feat: indexer service to replace etherscan dependency

go/indexer/Makefile

+GITCOMMIT := $(shell git rev-parse HEAD)
+GITDATE := $(shell git show -s --format='%ct')
+GITVERSION := $(shell cat package.json | jq .version)
+
+LDFLAGSSTRING +=-X main.GitCommit=$(GITCOMMIT)
+LDFLAGSSTRING +=-X main.GitDate=$(GITDATE)
+LDFLAGSSTRING +=-X main.GitVersion=$(GITVERSION)
+LDFLAGS := -ldflags "$(LDFLAGSSTRING)"
+
+L1BRIDGE_ABI_ARTIFACT = ../../packages/contracts/artifacts/contracts/L1/messaging/L1StandardBridge.sol/L1StandardBridge.json
+L2BRIDGE_ABI_ARTIFACT = ../../packages/contracts/artifacts/contracts/L2/messaging/L2StandardBridge.sol/L2StandardBridge.json
+
+ERC20_ABI_ARTIFACT = ./contracts/ERC20.sol/ERC20.json
+
+SCC_ABI_ARTIFACT = ../../packages/contracts/artifacts/contracts/L1/rollup/StateCommitmentChain.sol/StateCommitmentChain.json
+
+indexer:
+	env GO111MODULE=on go build -v $(LDFLAGS) ./cmd/indexer
+
+clean:
+	rm indexer
+
+test:
+	go test -v ./...
+
+lint:
+	golangci-lint run ./...
+
+bindings: bindings-l1bridge bindings-l2bridge bindings-l1erc20 bindings-l2erc20 bindings-scc
+
+bindings-l1bridge:
+	$(eval temp := $(shell mktemp))
+
+	cat $(L1BRIDGE_ABI_ARTIFACT) \
+		| jq -r .bytecode > $(temp)
+
+	cat $(L1BRIDGE_ABI_ARTIFACT) \
+		| jq .abi \
+		| abigen --pkg l1bridge \
+		--abi - \
+		--out bindings/l1bridge/l1_standard_bridge.go \
+		--type L1StandardBridge \
+		--bin $(temp)
+
+	rm $(temp)
+
+bindings-l2bridge:
+	$(eval temp := $(shell mktemp))
+
+	cat $(L2BRIDGE_ABI_ARTIFACT) \
+		| jq -r .bytecode > $(temp)
+
+	cat $(L2BRIDGE_ABI_ARTIFACT) \
+		| jq .abi \
+		| ../../l2geth/build/bin/abigen --pkg l2bridge \
+		--abi - \
+		--out bindings/l2bridge/l2_standard_bridge.go \
+		--type L2StandardBridge \
+		--bin $(temp)
+
+	rm $(temp)
+
+bindings-l1erc20:
+	$(eval temp := $(shell mktemp))
+
+	cat $(ERC20_ABI_ARTIFACT) \
+		| jq -r .bytecode > $(temp)
+
+	cat $(ERC20_ABI_ARTIFACT) \
+		| jq .abi \
+		| abigen --pkg l1erc20 \
+		--abi - \
+		--out bindings/l1erc20/l1erc20.go \
+		--type L1ERC20 \
+		--bin $(temp)
+
+	rm $(temp)
+
+bindings-l2erc20:
+	$(eval temp := $(shell mktemp))
+
+	cat $(ERC20_ABI_ARTIFACT) \
+		| jq -r .bytecode > $(temp)
+
+	cat $(ERC20_ABI_ARTIFACT) \
+		| jq .abi \
+		| ../../l2geth/build/bin/abigen --pkg l2erc20 \
+		--abi - \
+		--out bindings/l2erc20/l2erc20.go \
+		--type L2ERC20 \
+		--bin $(temp)
+
+	rm $(temp)
+
+bindings-scc:
+	$(eval temp := $(shell mktemp))
+
+	cat $(SCC_ABI_ARTIFACT) \
+		| jq -r .bytecode > $(temp)
+
+	cat $(SCC_ABI_ARTIFACT) \
+		| jq .abi \
+		| abigen --pkg scc \
+		--abi - \
+		--out bindings/scc/statecommitmentchain.go \
+		--type StateCommitmentChain \
+		--bin $(temp)
+
+	rm $(temp)
+
+bindings-address-manager:
+	$(eval temp := $(shell mktemp))
+
+	cat $(ADDRESS_MANAGER_ABI_ARTIFACT) \
+		| jq -r .bytecode > $(temp)
+
+	cat $(ADDRESS_MANAGER_ABI_ARTIFACT) \
+		| jq .abi \
+		| abigen --pkg address_manager \
+		--abi - \
+		--out ./bindings/address_manager/address_manager.go \
+		--type AddressManager \
+		--bin $(temp)
+
+.PHONY: \
+	indexer \
+	bindings \
+	bindings-l1bridge \
+	bindings-l2bridge \
+	bindings-l1erc20 \
+	bindings-l2erc20 \
+	bindings-scc \
+	clean \
+	test \
+	lint

go/indexer/bindings/address_manager/address_manager.go

+// Code generated - DO NOT EDIT.
+// This file is a generated binding and any manual changes will be lost.
+
+package address_manager
+
+import (
+	"errors"
+	"math/big"
+	"strings"
+
+	ethereum "github.com/ethereum/go-ethereum"
+	"github.com/ethereum/go-ethereum/accounts/abi"
+	"github.com/ethereum/go-ethereum/accounts/abi/bind"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/event"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var (
+	_ = errors.New
+	_ = big.NewInt
+	_ = strings.NewReader
+	_ = ethereum.NotFound
+	_ = bind.Bind
+	_ = common.Big1
+	_ = types.BloomLookup
+	_ = event.NewSubscription
+)
+
+// AddressManagerMetaData contains all meta data concerning the AddressManager contract.
+var AddressManagerMetaData = &bind.MetaData{
+	ABI: "[{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"string\",\"name\":\"_name\",\"type\":\"string\"},{\"indexed\":false,\"internalType\":\"address\",\"name\":\"_newAddress\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"address\",\"name\":\"_oldAddress\",\"type\":\"address\"}],\"name\":\"AddressSet\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"previousOwner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"OwnershipTransferred\",\"type\":\"event\"},{\"inputs\":[{\"internalType\":\"string\",\"name\":\"_name\",\"type\":\"string\"}],\"name\":\"getAddress\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"owner\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"renounceOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"string\",\"name\":\"_name\",\"type\":\"string\"},{\"internalType\":\"address\",\"name\":\"_address\",\"type\":\"address\"}],\"name\":\"setAddress\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"transferOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}]",
+	Bin: "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",
+}
+
+// AddressManagerABI is the input ABI used to generate the binding from.
+// Deprecated: Use AddressManagerMetaData.ABI instead.
+var AddressManagerABI = AddressManagerMetaData.ABI
+
+// AddressManagerBin is the compiled bytecode used for deploying new contracts.
+// Deprecated: Use AddressManagerMetaData.Bin instead.
+var AddressManagerBin = AddressManagerMetaData.Bin
+
+// DeployAddressManager deploys a new Ethereum contract, binding an instance of AddressManager to it.
+func DeployAddressManager(auth *bind.TransactOpts, backend bind.ContractBackend) (common.Address, *types.Transaction, *AddressManager, error) {
+	parsed, err := AddressManagerMetaData.GetAbi()
+	if err != nil {
+		return common.Address{}, nil, nil, err
+	}
+	if parsed == nil {
+		return common.Address{}, nil, nil, errors.New("GetABI returned nil")
+	}
+
+	address, tx, contract, err := bind.DeployContract(auth, *parsed, common.FromHex(AddressManagerBin), backend)
+	if err != nil {
+		return common.Address{}, nil, nil, err
+	}
+	return address, tx, &AddressManager{AddressManagerCaller: AddressManagerCaller{contract: contract}, AddressManagerTransactor: AddressManagerTransactor{contract: contract}, AddressManagerFilterer: AddressManagerFilterer{contract: contract}}, nil
+}
+
+// AddressManager is an auto generated Go binding around an Ethereum contract.
+type AddressManager struct {
+	AddressManagerCaller     // Read-only binding to the contract
+	AddressManagerTransactor // Write-only binding to the contract
+	AddressManagerFilterer   // Log filterer for contract events
+}
+
+// AddressManagerCaller is an auto generated read-only Go binding around an Ethereum contract.
+type AddressManagerCaller struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// AddressManagerTransactor is an auto generated write-only Go binding around an Ethereum contract.
+type AddressManagerTransactor struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// AddressManagerFilterer is an auto generated log filtering Go binding around an Ethereum contract events.
+type AddressManagerFilterer struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// AddressManagerSession is an auto generated Go binding around an Ethereum contract,
+// with pre-set call and transact options.
+type AddressManagerSession struct {
+	Contract     *AddressManager   // Generic contract binding to set the session for
+	CallOpts     bind.CallOpts     // Call options to use throughout this session
+	TransactOpts bind.TransactOpts // Transaction auth options to use throughout this session
+}
+
+// AddressManagerCallerSession is an auto generated read-only Go binding around an Ethereum contract,
+// with pre-set call options.
+type AddressManagerCallerSession struct {
+	Contract *AddressManagerCaller // Generic contract caller binding to set the session for
+	CallOpts bind.CallOpts         // Call options to use throughout this session
+}
+
+// AddressManagerTransactorSession is an auto generated write-only Go binding around an Ethereum contract,
+// with pre-set transact options.
+type AddressManagerTransactorSession struct {
+	Contract     *AddressManagerTransactor // Generic contract transactor binding to set the session for
+	TransactOpts bind.TransactOpts         // Transaction auth options to use throughout this session
+}
+
+// AddressManagerRaw is an auto generated low-level Go binding around an Ethereum contract.
+type AddressManagerRaw struct {
+	Contract *AddressManager // Generic contract binding to access the raw methods on
+}
+
+// AddressManagerCallerRaw is an auto generated low-level read-only Go binding around an Ethereum contract.
+type AddressManagerCallerRaw struct {
+	Contract *AddressManagerCaller // Generic read-only contract binding to access the raw methods on
+}
+
+// AddressManagerTransactorRaw is an auto generated low-level write-only Go binding around an Ethereum contract.
+type AddressManagerTransactorRaw struct {
+	Contract *AddressManagerTransactor // Generic write-only contract binding to access the raw methods on
+}
+
+// NewAddressManager creates a new instance of AddressManager, bound to a specific deployed contract.
+func NewAddressManager(address common.Address, backend bind.ContractBackend) (*AddressManager, error) {
+	contract, err := bindAddressManager(address, backend, backend, backend)
+	if err != nil {
+		return nil, err
+	}
+	return &AddressManager{AddressManagerCaller: AddressManagerCaller{contract: contract}, AddressManagerTransactor: AddressManagerTransactor{contract: contract}, AddressManagerFilterer: AddressManagerFilterer{contract: contract}}, nil
+}
+
+// NewAddressManagerCaller creates a new read-only instance of AddressManager, bound to a specific deployed contract.
+func NewAddressManagerCaller(address common.Address, caller bind.ContractCaller) (*AddressManagerCaller, error) {
+	contract, err := bindAddressManager(address, caller, nil, nil)
+	if err != nil {
+		return nil, err
+	}
+	return &AddressManagerCaller{contract: contract}, nil
+}
+
+// NewAddressManagerTransactor creates a new write-only instance of AddressManager, bound to a specific deployed contract.
+func NewAddressManagerTransactor(address common.Address, transactor bind.ContractTransactor) (*AddressManagerTransactor, error) {
+	contract, err := bindAddressManager(address, nil, transactor, nil)
+	if err != nil {
+		return nil, err
+	}
+	return &AddressManagerTransactor{contract: contract}, nil
+}
+
+// NewAddressManagerFilterer creates a new log filterer instance of AddressManager, bound to a specific deployed contract.
+func NewAddressManagerFilterer(address common.Address, filterer bind.ContractFilterer) (*AddressManagerFilterer, error) {
+	contract, err := bindAddressManager(address, nil, nil, filterer)
+	if err != nil {
+		return nil, err
+	}
+	return &AddressManagerFilterer{contract: contract}, nil
+}
+
+// bindAddressManager binds a generic wrapper to an already deployed contract.
+func bindAddressManager(address common.Address, caller bind.ContractCaller, transactor bind.ContractTransactor, filterer bind.ContractFilterer) (*bind.BoundContract, error) {
+	parsed, err := abi.JSON(strings.NewReader(AddressManagerABI))
+	if err != nil {
+		return nil, err
+	}
+	return bind.NewBoundContract(address, parsed, caller, transactor, filterer), nil
+}
+
+// Call invokes the (constant) contract method with params as input values and
+// sets the output to result. The result type might be a single field for simple
+// returns, a slice of interfaces for anonymous returns and a struct for named
+// returns.
+func (_AddressManager *AddressManagerRaw) Call(opts *bind.CallOpts, result *[]interface{}, method string, params ...interface{}) error {
+	return _AddressManager.Contract.AddressManagerCaller.contract.Call(opts, result, method, params...)
+}
+
+// Transfer initiates a plain transaction to move funds to the contract, calling
+// its default method if one is available.
+func (_AddressManager *AddressManagerRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _AddressManager.Contract.AddressManagerTransactor.contract.Transfer(opts)
+}
+
+// Transact invokes the (paid) contract method with params as input values.
+func (_AddressManager *AddressManagerRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
+	return _AddressManager.Contract.AddressManagerTransactor.contract.Transact(opts, method, params...)
+}
+
+// Call invokes the (constant) contract method with params as input values and
+// sets the output to result. The result type might be a single field for simple
+// returns, a slice of interfaces for anonymous returns and a struct for named
+// returns.
+func (_AddressManager *AddressManagerCallerRaw) Call(opts *bind.CallOpts, result *[]interface{}, method string, params ...interface{}) error {
+	return _AddressManager.Contract.contract.Call(opts, result, method, params...)
+}
+
+// Transfer initiates a plain transaction to move funds to the contract, calling
+// its default method if one is available.
+func (_AddressManager *AddressManagerTransactorRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _AddressManager.Contract.contract.Transfer(opts)
+}
+
+// Transact invokes the (paid) contract method with params as input values.
+func (_AddressManager *AddressManagerTransactorRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
+	return _AddressManager.Contract.contract.Transact(opts, method, params...)
+}
+
+// GetAddress is a free data retrieval call binding the contract method 0xbf40fac1.
+//
+// Solidity: function getAddress(string _name) view returns(address)
+func (_AddressManager *AddressManagerCaller) GetAddress(opts *bind.CallOpts, _name string) (common.Address, error) {
+	var out []interface{}
+	err := _AddressManager.contract.Call(opts, &out, "getAddress", _name)
+
+	if err != nil {
+		return *new(common.Address), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(common.Address)).(*common.Address)
+
+	return out0, err
+
+}
+
+// GetAddress is a free data retrieval call binding the contract method 0xbf40fac1.
+//
+// Solidity: function getAddress(string _name) view returns(address)
+func (_AddressManager *AddressManagerSession) GetAddress(_name string) (common.Address, error) {
+	return _AddressManager.Contract.GetAddress(&_AddressManager.CallOpts, _name)
+}
+
+// GetAddress is a free data retrieval call binding the contract method 0xbf40fac1.
+//
+// Solidity: function getAddress(string _name) view returns(address)
+func (_AddressManager *AddressManagerCallerSession) GetAddress(_name string) (common.Address, error) {
+	return _AddressManager.Contract.GetAddress(&_AddressManager.CallOpts, _name)
+}
+
+// Owner is a free data retrieval call binding the contract method 0x8da5cb5b.
+//
+// Solidity: function owner() view returns(address)
+func (_AddressManager *AddressManagerCaller) Owner(opts *bind.CallOpts) (common.Address, error) {
+	var out []interface{}
+	err := _AddressManager.contract.Call(opts, &out, "owner")
+
+	if err != nil {
+		return *new(common.Address), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(common.Address)).(*common.Address)
+
+	return out0, err
+
+}
+
+// Owner is a free data retrieval call binding the contract method 0x8da5cb5b.
+//
+// Solidity: function owner() view returns(address)
+func (_AddressManager *AddressManagerSession) Owner() (common.Address, error) {
+	return _AddressManager.Contract.Owner(&_AddressManager.CallOpts)
+}
+
+// Owner is a free data retrieval call binding the contract method 0x8da5cb5b.
+//
+// Solidity: function owner() view returns(address)
+func (_AddressManager *AddressManagerCallerSession) Owner() (common.Address, error) {
+	return _AddressManager.Contract.Owner(&_AddressManager.CallOpts)
+}
+
+// RenounceOwnership is a paid mutator transaction binding the contract method 0x715018a6.
+//
+// Solidity: function renounceOwnership() returns()
+func (_AddressManager *AddressManagerTransactor) RenounceOwnership(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _AddressManager.contract.Transact(opts, "renounceOwnership")
+}
+
+// RenounceOwnership is a paid mutator transaction binding the contract method 0x715018a6.
+//
+// Solidity: function renounceOwnership() returns()
+func (_AddressManager *AddressManagerSession) RenounceOwnership() (*types.Transaction, error) {
+	return _AddressManager.Contract.RenounceOwnership(&_AddressManager.TransactOpts)
+}
+
+// RenounceOwnership is a paid mutator transaction binding the contract method 0x715018a6.
+//
+// Solidity: function renounceOwnership() returns()
+func (_AddressManager *AddressManagerTransactorSession) RenounceOwnership() (*types.Transaction, error) {
+	return _AddressManager.Contract.RenounceOwnership(&_AddressManager.TransactOpts)
+}
+
+// SetAddress is a paid mutator transaction binding the contract method 0x9b2ea4bd.
+//
+// Solidity: function setAddress(string _name, address _address) returns()
+func (_AddressManager *AddressManagerTransactor) SetAddress(opts *bind.TransactOpts, _name string, _address common.Address) (*types.Transaction, error) {
+	return _AddressManager.contract.Transact(opts, "setAddress", _name, _address)
+}
+
+// SetAddress is a paid mutator transaction binding the contract method 0x9b2ea4bd.
+//
+// Solidity: function setAddress(string _name, address _address) returns()
+func (_AddressManager *AddressManagerSession) SetAddress(_name string, _address common.Address) (*types.Transaction, error) {
+	return _AddressManager.Contract.SetAddress(&_AddressManager.TransactOpts, _name, _address)
+}
+
+// SetAddress is a paid mutator transaction binding the contract method 0x9b2ea4bd.
+//
+// Solidity: function setAddress(string _name, address _address) returns()
+func (_AddressManager *AddressManagerTransactorSession) SetAddress(_name string, _address common.Address) (*types.Transaction, error) {
+	return _AddressManager.Contract.SetAddress(&_AddressManager.TransactOpts, _name, _address)
+}
+
+// TransferOwnership is a paid mutator transaction binding the contract method 0xf2fde38b.
+//
+// Solidity: function transferOwnership(address newOwner) returns()
+func (_AddressManager *AddressManagerTransactor) TransferOwnership(opts *bind.TransactOpts, newOwner common.Address) (*types.Transaction, error) {
+	return _AddressManager.contract.Transact(opts, "transferOwnership", newOwner)
+}
+
+// TransferOwnership is a paid mutator transaction binding the contract method 0xf2fde38b.
+//
+// Solidity: function transferOwnership(address newOwner) returns()
+func (_AddressManager *AddressManagerSession) TransferOwnership(newOwner common.Address) (*types.Transaction, error) {
+	return _AddressManager.Contract.TransferOwnership(&_AddressManager.TransactOpts, newOwner)
+}
+
+// TransferOwnership is a paid mutator transaction binding the contract method 0xf2fde38b.
+//
+// Solidity: function transferOwnership(address newOwner) returns()
+func (_AddressManager *AddressManagerTransactorSession) TransferOwnership(newOwner common.Address) (*types.Transaction, error) {
+	return _AddressManager.Contract.TransferOwnership(&_AddressManager.TransactOpts, newOwner)
+}
+
+// AddressManagerAddressSetIterator is returned from FilterAddressSet and is used to iterate over the raw logs and unpacked data for AddressSet events raised by the AddressManager contract.
+type AddressManagerAddressSetIterator struct {
+	Event *AddressManagerAddressSet // Event containing the contract specifics and raw log
+
+	contract *bind.BoundContract // Generic contract to use for unpacking event data
+	event    string              // Event name to use for unpacking event data
+
+	logs chan types.Log        // Log channel receiving the found contract events
+	sub  ethereum.Subscription // Subscription for errors, completion and termination
+	done bool                  // Whether the subscription completed delivering logs
+	fail error                 // Occurred error to stop iteration
+}
+
+// Next advances the iterator to the subsequent event, returning whether there
+// are any more events found. In case of a retrieval or parsing error, false is
+// returned and Error() can be queried for the exact failure.
+func (it *AddressManagerAddressSetIterator) Next() bool {
+	// If the iterator failed, stop iterating
+	if it.fail != nil {
+		return false
+	}
+	// If the iterator completed, deliver directly whatever's available
+	if it.done {
+		select {
+		case log := <-it.logs:
+			it.Event = new(AddressManagerAddressSet)
+			if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+				it.fail = err
+				return false
+			}
+			it.Event.Raw = log
+			return true
+
+		default:
+			return false
+		}
+	}
+	// Iterator still in progress, wait for either a data or an error event
+	select {
+	case log := <-it.logs:
+		it.Event = new(AddressManagerAddressSet)
+		if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+			it.fail = err
+			return false
+		}
+		it.Event.Raw = log
+		return true
+
+	case err := <-it.sub.Err():
+		it.done = true
+		it.fail = err
+		return it.Next()
+	}
+}
+
+// Error returns any retrieval or parsing error occurred during filtering.
+func (it *AddressManagerAddressSetIterator) Error() error {
+	return it.fail
+}
+
+// Close terminates the iteration process, releasing any pending underlying
+// resources.
+func (it *AddressManagerAddressSetIterator) Close() error {
+	it.sub.Unsubscribe()
+	return nil
+}
+
+// AddressManagerAddressSet represents a AddressSet event raised by the AddressManager contract.
+type AddressManagerAddressSet struct {
+	Name       common.Hash
+	NewAddress common.Address
+	OldAddress common.Address
+	Raw        types.Log // Blockchain specific contextual infos
+}
+
+// FilterAddressSet is a free log retrieval operation binding the contract event 0x9416a153a346f93d95f94b064ae3f148b6460473c6e82b3f9fc2521b873fcd6c.
+//
+// Solidity: event AddressSet(string indexed _name, address _newAddress, address _oldAddress)
+func (_AddressManager *AddressManagerFilterer) FilterAddressSet(opts *bind.FilterOpts, _name []string) (*AddressManagerAddressSetIterator, error) {
+
+	var _nameRule []interface{}
+	for _, _nameItem := range _name {
+		_nameRule = append(_nameRule, _nameItem)
+	}
+
+	logs, sub, err := _AddressManager.contract.FilterLogs(opts, "AddressSet", _nameRule)
+	if err != nil {
+		return nil, err
+	}
+	return &AddressManagerAddressSetIterator{contract: _AddressManager.contract, event: "AddressSet", logs: logs, sub: sub}, nil
+}
+
+// WatchAddressSet is a free log subscription operation binding the contract event 0x9416a153a346f93d95f94b064ae3f148b6460473c6e82b3f9fc2521b873fcd6c.
+//
+// Solidity: event AddressSet(string indexed _name, address _newAddress, address _oldAddress)
+func (_AddressManager *AddressManagerFilterer) WatchAddressSet(opts *bind.WatchOpts, sink chan<- *AddressManagerAddressSet, _name []string) (event.Subscription, error) {
+
+	var _nameRule []interface{}
+	for _, _nameItem := range _name {
+		_nameRule = append(_nameRule, _nameItem)
+	}
+
+	logs, sub, err := _AddressManager.contract.WatchLogs(opts, "AddressSet", _nameRule)
+	if err != nil {
+		return nil, err
+	}
+	return event.NewSubscription(func(quit <-chan struct{}) error {
+		defer sub.Unsubscribe()
+		for {
+			select {
+			case log := <-logs:
+				// New log arrived, parse the event and forward to the user
+				event := new(AddressManagerAddressSet)
+				if err := _AddressManager.contract.UnpackLog(event, "AddressSet", log); err != nil {
+					return err
+				}
+				event.Raw = log
+
+				select {
+				case sink <- event:
+				case err := <-sub.Err():
+					return err
+				case <-quit:
+					return nil
+				}
+			case err := <-sub.Err():
+				return err
+			case <-quit:
+				return nil
+			}
+		}
+	}), nil
+}
+
+// ParseAddressSet is a log parse operation binding the contract event 0x9416a153a346f93d95f94b064ae3f148b6460473c6e82b3f9fc2521b873fcd6c.
+//
+// Solidity: event AddressSet(string indexed _name, address _newAddress, address _oldAddress)
+func (_AddressManager *AddressManagerFilterer) ParseAddressSet(log types.Log) (*AddressManagerAddressSet, error) {
+	event := new(AddressManagerAddressSet)
+	if err := _AddressManager.contract.UnpackLog(event, "AddressSet", log); err != nil {
+		return nil, err
+	}
+	event.Raw = log
+	return event, nil
+}
+
+// AddressManagerOwnershipTransferredIterator is returned from FilterOwnershipTransferred and is used to iterate over the raw logs and unpacked data for OwnershipTransferred events raised by the AddressManager contract.
+type AddressManagerOwnershipTransferredIterator struct {
+	Event *AddressManagerOwnershipTransferred // Event containing the contract specifics and raw log
+
+	contract *bind.BoundContract // Generic contract to use for unpacking event data
+	event    string              // Event name to use for unpacking event data
+
+	logs chan types.Log        // Log channel receiving the found contract events
+	sub  ethereum.Subscription // Subscription for errors, completion and termination
+	done bool                  // Whether the subscription completed delivering logs
+	fail error                 // Occurred error to stop iteration
+}
+
+// Next advances the iterator to the subsequent event, returning whether there
+// are any more events found. In case of a retrieval or parsing error, false is
+// returned and Error() can be queried for the exact failure.
+func (it *AddressManagerOwnershipTransferredIterator) Next() bool {
+	// If the iterator failed, stop iterating
+	if it.fail != nil {
+		return false
+	}
+	// If the iterator completed, deliver directly whatever's available
+	if it.done {
+		select {
+		case log := <-it.logs:
+			it.Event = new(AddressManagerOwnershipTransferred)
+			if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+				it.fail = err
+				return false
+			}
+			it.Event.Raw = log
+			return true
+
+		default:
+			return false
+		}
+	}
+	// Iterator still in progress, wait for either a data or an error event
+	select {
+	case log := <-it.logs:
+		it.Event = new(AddressManagerOwnershipTransferred)
+		if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+			it.fail = err
+			return false
+		}
+		it.Event.Raw = log
+		return true
+
+	case err := <-it.sub.Err():
+		it.done = true
+		it.fail = err
+		return it.Next()
+	}
+}
+
+// Error returns any retrieval or parsing error occurred during filtering.
+func (it *AddressManagerOwnershipTransferredIterator) Error() error {
+	return it.fail
+}
+
+// Close terminates the iteration process, releasing any pending underlying
+// resources.
+func (it *AddressManagerOwnershipTransferredIterator) Close() error {
+	it.sub.Unsubscribe()
+	return nil
+}
+
+// AddressManagerOwnershipTransferred represents a OwnershipTransferred event raised by the AddressManager contract.
+type AddressManagerOwnershipTransferred struct {
+	PreviousOwner common.Address
+	NewOwner      common.Address
+	Raw           types.Log // Blockchain specific contextual infos
+}
+
+// FilterOwnershipTransferred is a free log retrieval operation binding the contract event 0x8be0079c531659141344cd1fd0a4f28419497f9722a3daafe3b4186f6b6457e0.
+//
+// Solidity: event OwnershipTransferred(address indexed previousOwner, address indexed newOwner)
+func (_AddressManager *AddressManagerFilterer) FilterOwnershipTransferred(opts *bind.FilterOpts, previousOwner []common.Address, newOwner []common.Address) (*AddressManagerOwnershipTransferredIterator, error) {
+
+	var previousOwnerRule []interface{}
+	for _, previousOwnerItem := range previousOwner {
+		previousOwnerRule = append(previousOwnerRule, previousOwnerItem)
+	}
+	var newOwnerRule []interface{}
+	for _, newOwnerItem := range newOwner {
+		newOwnerRule = append(newOwnerRule, newOwnerItem)
+	}
+
+	logs, sub, err := _AddressManager.contract.FilterLogs(opts, "OwnershipTransferred", previousOwnerRule, newOwnerRule)
+	if err != nil {
+		return nil, err
+	}
+	return &AddressManagerOwnershipTransferredIterator{contract: _AddressManager.contract, event: "OwnershipTransferred", logs: logs, sub: sub}, nil
+}
+
+// WatchOwnershipTransferred is a free log subscription operation binding the contract event 0x8be0079c531659141344cd1fd0a4f28419497f9722a3daafe3b4186f6b6457e0.
+//
+// Solidity: event OwnershipTransferred(address indexed previousOwner, address indexed newOwner)
+func (_AddressManager *AddressManagerFilterer) WatchOwnershipTransferred(opts *bind.WatchOpts, sink chan<- *AddressManagerOwnershipTransferred, previousOwner []common.Address, newOwner []common.Address) (event.Subscription, error) {
+
+	var previousOwnerRule []interface{}
+	for _, previousOwnerItem := range previousOwner {
+		previousOwnerRule = append(previousOwnerRule, previousOwnerItem)
+	}
+	var newOwnerRule []interface{}
+	for _, newOwnerItem := range newOwner {
+		newOwnerRule = append(newOwnerRule, newOwnerItem)
+	}
+
+	logs, sub, err := _AddressManager.contract.WatchLogs(opts, "OwnershipTransferred", previousOwnerRule, newOwnerRule)
+	if err != nil {
+		return nil, err
+	}
+	return event.NewSubscription(func(quit <-chan struct{}) error {
+		defer sub.Unsubscribe()
+		for {
+			select {
+			case log := <-logs:
+				// New log arrived, parse the event and forward to the user
+				event := new(AddressManagerOwnershipTransferred)
+				if err := _AddressManager.contract.UnpackLog(event, "OwnershipTransferred", log); err != nil {
+					return err
+				}
+				event.Raw = log
+
+				select {
+				case sink <- event:
+				case err := <-sub.Err():
+					return err
+				case <-quit:
+					return nil
+				}
+			case err := <-sub.Err():
+				return err
+			case <-quit:
+				return nil
+			}
+		}
+	}), nil
+}
+
+// ParseOwnershipTransferred is a log parse operation binding the contract event 0x8be0079c531659141344cd1fd0a4f28419497f9722a3daafe3b4186f6b6457e0.
+//
+// Solidity: event OwnershipTransferred(address indexed previousOwner, address indexed newOwner)
+func (_AddressManager *AddressManagerFilterer) ParseOwnershipTransferred(log types.Log) (*AddressManagerOwnershipTransferred, error) {
+	event := new(AddressManagerOwnershipTransferred)
+	if err := _AddressManager.contract.UnpackLog(event, "OwnershipTransferred", log); err != nil {
+		return nil, err
+	}
+	event.Raw = log
+	return event, nil
+}

go/indexer/bindings/l1bridge/l1_standard_bridge.go

+// Code generated - DO NOT EDIT.
+// This file is a generated binding and any manual changes will be lost.
+
+package l1bridge
+
+import (
+	"errors"
+	"math/big"
+	"strings"
+
+	ethereum "github.com/ethereum/go-ethereum"
+	"github.com/ethereum/go-ethereum/accounts/abi"
+	"github.com/ethereum/go-ethereum/accounts/abi/bind"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/event"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var (
+	_ = errors.New
+	_ = big.NewInt
+	_ = strings.NewReader
+	_ = ethereum.NotFound
+	_ = bind.Bind
+	_ = common.Big1
+	_ = types.BloomLookup
+	_ = event.NewSubscription
+)
+
+// L1StandardBridgeMetaData contains all meta data concerning the L1StandardBridge contract.
+var L1StandardBridgeMetaData = &bind.MetaData{
+	ABI: "[{\"inputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_l1Token\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_l2Token\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_from\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"address\",\"name\":\"_to\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"bytes\",\"name\":\"_data\",\"type\":\"bytes\"}],\"name\":\"ERC20DepositInitiated\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_l1Token\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_l2Token\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_from\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"address\",\"name\":\"_to\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"bytes\",\"name\":\"_data\",\"type\":\"bytes\"}],\"name\":\"ERC20WithdrawalFinalized\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_from\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_to\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"bytes\",\"name\":\"_data\",\"type\":\"bytes\"}],\"name\":\"ETHDepositInitiated\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_from\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_to\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"bytes\",\"name\":\"_data\",\"type\":\"bytes\"}],\"name\":\"ETHWithdrawalFinalized\",\"type\":\"event\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_l1Token\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"_l2Token\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"},{\"internalType\":\"uint32\",\"name\":\"_l2Gas\",\"type\":\"uint32\"},{\"internalType\":\"bytes\",\"name\":\"_data\",\"type\":\"bytes\"}],\"name\":\"depositERC20\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_l1Token\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"_l2Token\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"_to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"},{\"internalType\":\"uint32\",\"name\":\"_l2Gas\",\"type\":\"uint32\"},{\"internalType\":\"bytes\",\"name\":\"_data\",\"type\":\"bytes\"}],\"name\":\"depositERC20To\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint32\",\"name\":\"_l2Gas\",\"type\":\"uint32\"},{\"internalType\":\"bytes\",\"name\":\"_data\",\"type\":\"bytes\"}],\"name\":\"depositETH\",\"outputs\":[],\"stateMutability\":\"payable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_to\",\"type\":\"address\"},{\"internalType\":\"uint32\",\"name\":\"_l2Gas\",\"type\":\"uint32\"},{\"internalType\":\"bytes\",\"name\":\"_data\",\"type\":\"bytes\"}],\"name\":\"depositETHTo\",\"outputs\":[],\"stateMutability\":\"payable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"name\":\"deposits\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"donateETH\",\"outputs\":[],\"stateMutability\":\"payable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_l1Token\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"_l2Token\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"_from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"_to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"},{\"internalType\":\"bytes\",\"name\":\"_data\",\"type\":\"bytes\"}],\"name\":\"finalizeERC20Withdrawal\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"_to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"},{\"internalType\":\"bytes\",\"name\":\"_data\",\"type\":\"bytes\"}],\"name\":\"finalizeETHWithdrawal\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_l1messenger\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"_l2TokenBridge\",\"type\":\"address\"}],\"name\":\"initialize\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"l2TokenBridge\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"messenger\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"stateMutability\":\"payable\",\"type\":\"receive\"}]",
+	Bin: "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+}
+
+// L1StandardBridgeABI is the input ABI used to generate the binding from.
+// Deprecated: Use L1StandardBridgeMetaData.ABI instead.
+var L1StandardBridgeABI = L1StandardBridgeMetaData.ABI
+
+// L1StandardBridgeBin is the compiled bytecode used for deploying new contracts.
+// Deprecated: Use L1StandardBridgeMetaData.Bin instead.
+var L1StandardBridgeBin = L1StandardBridgeMetaData.Bin
+
+// DeployL1StandardBridge deploys a new Ethereum contract, binding an instance of L1StandardBridge to it.
+func DeployL1StandardBridge(auth *bind.TransactOpts, backend bind.ContractBackend) (common.Address, *types.Transaction, *L1StandardBridge, error) {
+	parsed, err := L1StandardBridgeMetaData.GetAbi()
+	if err != nil {
+		return common.Address{}, nil, nil, err
+	}
+	if parsed == nil {
+		return common.Address{}, nil, nil, errors.New("GetABI returned nil")
+	}
+
+	address, tx, contract, err := bind.DeployContract(auth, *parsed, common.FromHex(L1StandardBridgeBin), backend)
+	if err != nil {
+		return common.Address{}, nil, nil, err
+	}
+	return address, tx, &L1StandardBridge{L1StandardBridgeCaller: L1StandardBridgeCaller{contract: contract}, L1StandardBridgeTransactor: L1StandardBridgeTransactor{contract: contract}, L1StandardBridgeFilterer: L1StandardBridgeFilterer{contract: contract}}, nil
+}
+
+// L1StandardBridge is an auto generated Go binding around an Ethereum contract.
+type L1StandardBridge struct {
+	L1StandardBridgeCaller     // Read-only binding to the contract
+	L1StandardBridgeTransactor // Write-only binding to the contract
+	L1StandardBridgeFilterer   // Log filterer for contract events
+}
+
+// L1StandardBridgeCaller is an auto generated read-only Go binding around an Ethereum contract.
+type L1StandardBridgeCaller struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// L1StandardBridgeTransactor is an auto generated write-only Go binding around an Ethereum contract.
+type L1StandardBridgeTransactor struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// L1StandardBridgeFilterer is an auto generated log filtering Go binding around an Ethereum contract events.
+type L1StandardBridgeFilterer struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// L1StandardBridgeSession is an auto generated Go binding around an Ethereum contract,
+// with pre-set call and transact options.
+type L1StandardBridgeSession struct {
+	Contract     *L1StandardBridge // Generic contract binding to set the session for
+	CallOpts     bind.CallOpts     // Call options to use throughout this session
+	TransactOpts bind.TransactOpts // Transaction auth options to use throughout this session
+}
+
+// L1StandardBridgeCallerSession is an auto generated read-only Go binding around an Ethereum contract,
+// with pre-set call options.
+type L1StandardBridgeCallerSession struct {
+	Contract *L1StandardBridgeCaller // Generic contract caller binding to set the session for
+	CallOpts bind.CallOpts           // Call options to use throughout this session
+}
+
+// L1StandardBridgeTransactorSession is an auto generated write-only Go binding around an Ethereum contract,
+// with pre-set transact options.
+type L1StandardBridgeTransactorSession struct {
+	Contract     *L1StandardBridgeTransactor // Generic contract transactor binding to set the session for
+	TransactOpts bind.TransactOpts           // Transaction auth options to use throughout this session
+}
+
+// L1StandardBridgeRaw is an auto generated low-level Go binding around an Ethereum contract.
+type L1StandardBridgeRaw struct {
+	Contract *L1StandardBridge // Generic contract binding to access the raw methods on
+}
+
+// L1StandardBridgeCallerRaw is an auto generated low-level read-only Go binding around an Ethereum contract.
+type L1StandardBridgeCallerRaw struct {
+	Contract *L1StandardBridgeCaller // Generic read-only contract binding to access the raw methods on
+}
+
+// L1StandardBridgeTransactorRaw is an auto generated low-level write-only Go binding around an Ethereum contract.
+type L1StandardBridgeTransactorRaw struct {
+	Contract *L1StandardBridgeTransactor // Generic write-only contract binding to access the raw methods on
+}
+
+// NewL1StandardBridge creates a new instance of L1StandardBridge, bound to a specific deployed contract.
+func NewL1StandardBridge(address common.Address, backend bind.ContractBackend) (*L1StandardBridge, error) {
+	contract, err := bindL1StandardBridge(address, backend, backend, backend)
+	if err != nil {
+		return nil, err
+	}
+	return &L1StandardBridge{L1StandardBridgeCaller: L1StandardBridgeCaller{contract: contract}, L1StandardBridgeTransactor: L1StandardBridgeTransactor{contract: contract}, L1StandardBridgeFilterer: L1StandardBridgeFilterer{contract: contract}}, nil
+}
+
+// NewL1StandardBridgeCaller creates a new read-only instance of L1StandardBridge, bound to a specific deployed contract.
+func NewL1StandardBridgeCaller(address common.Address, caller bind.ContractCaller) (*L1StandardBridgeCaller, error) {
+	contract, err := bindL1StandardBridge(address, caller, nil, nil)
+	if err != nil {
+		return nil, err
+	}
+	return &L1StandardBridgeCaller{contract: contract}, nil
+}
+
+// NewL1StandardBridgeTransactor creates a new write-only instance of L1StandardBridge, bound to a specific deployed contract.
+func NewL1StandardBridgeTransactor(address common.Address, transactor bind.ContractTransactor) (*L1StandardBridgeTransactor, error) {
+	contract, err := bindL1StandardBridge(address, nil, transactor, nil)
+	if err != nil {
+		return nil, err
+	}
+	return &L1StandardBridgeTransactor{contract: contract}, nil
+}
+
+// NewL1StandardBridgeFilterer creates a new log filterer instance of L1StandardBridge, bound to a specific deployed contract.
+func NewL1StandardBridgeFilterer(address common.Address, filterer bind.ContractFilterer) (*L1StandardBridgeFilterer, error) {
+	contract, err := bindL1StandardBridge(address, nil, nil, filterer)
+	if err != nil {
+		return nil, err
+	}
+	return &L1StandardBridgeFilterer{contract: contract}, nil
+}
+
+// bindL1StandardBridge binds a generic wrapper to an already deployed contract.
+func bindL1StandardBridge(address common.Address, caller bind.ContractCaller, transactor bind.ContractTransactor, filterer bind.ContractFilterer) (*bind.BoundContract, error) {
+	parsed, err := abi.JSON(strings.NewReader(L1StandardBridgeABI))
+	if err != nil {
+		return nil, err
+	}
+	return bind.NewBoundContract(address, parsed, caller, transactor, filterer), nil
+}
+
+// Call invokes the (constant) contract method with params as input values and
+// sets the output to result. The result type might be a single field for simple
+// returns, a slice of interfaces for anonymous returns and a struct for named
+// returns.
+func (_L1StandardBridge *L1StandardBridgeRaw) Call(opts *bind.CallOpts, result *[]interface{}, method string, params ...interface{}) error {
+	return _L1StandardBridge.Contract.L1StandardBridgeCaller.contract.Call(opts, result, method, params...)
+}
+
+// Transfer initiates a plain transaction to move funds to the contract, calling
+// its default method if one is available.
+func (_L1StandardBridge *L1StandardBridgeRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _L1StandardBridge.Contract.L1StandardBridgeTransactor.contract.Transfer(opts)
+}
+
+// Transact invokes the (paid) contract method with params as input values.
+func (_L1StandardBridge *L1StandardBridgeRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
+	return _L1StandardBridge.Contract.L1StandardBridgeTransactor.contract.Transact(opts, method, params...)
+}
+
+// Call invokes the (constant) contract method with params as input values and
+// sets the output to result. The result type might be a single field for simple
+// returns, a slice of interfaces for anonymous returns and a struct for named
+// returns.
+func (_L1StandardBridge *L1StandardBridgeCallerRaw) Call(opts *bind.CallOpts, result *[]interface{}, method string, params ...interface{}) error {
+	return _L1StandardBridge.Contract.contract.Call(opts, result, method, params...)
+}
+
+// Transfer initiates a plain transaction to move funds to the contract, calling
+// its default method if one is available.
+func (_L1StandardBridge *L1StandardBridgeTransactorRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _L1StandardBridge.Contract.contract.Transfer(opts)
+}
+
+// Transact invokes the (paid) contract method with params as input values.
+func (_L1StandardBridge *L1StandardBridgeTransactorRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
+	return _L1StandardBridge.Contract.contract.Transact(opts, method, params...)
+}
+
+// Deposits is a free data retrieval call binding the contract method 0x8f601f66.
+//
+// Solidity: function deposits(address , address ) view returns(uint256)
+func (_L1StandardBridge *L1StandardBridgeCaller) Deposits(opts *bind.CallOpts, arg0 common.Address, arg1 common.Address) (*big.Int, error) {
+	var out []interface{}
+	err := _L1StandardBridge.contract.Call(opts, &out, "deposits", arg0, arg1)
+
+	if err != nil {
+		return *new(*big.Int), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(*big.Int)).(**big.Int)
+
+	return out0, err
+
+}
+
+// Deposits is a free data retrieval call binding the contract method 0x8f601f66.
+//
+// Solidity: function deposits(address , address ) view returns(uint256)
+func (_L1StandardBridge *L1StandardBridgeSession) Deposits(arg0 common.Address, arg1 common.Address) (*big.Int, error) {
+	return _L1StandardBridge.Contract.Deposits(&_L1StandardBridge.CallOpts, arg0, arg1)
+}
+
+// Deposits is a free data retrieval call binding the contract method 0x8f601f66.
+//
+// Solidity: function deposits(address , address ) view returns(uint256)
+func (_L1StandardBridge *L1StandardBridgeCallerSession) Deposits(arg0 common.Address, arg1 common.Address) (*big.Int, error) {
+	return _L1StandardBridge.Contract.Deposits(&_L1StandardBridge.CallOpts, arg0, arg1)
+}
+
+// L2TokenBridge is a free data retrieval call binding the contract method 0x91c49bf8.
+//
+// Solidity: function l2TokenBridge() view returns(address)
+func (_L1StandardBridge *L1StandardBridgeCaller) L2TokenBridge(opts *bind.CallOpts) (common.Address, error) {
+	var out []interface{}
+	err := _L1StandardBridge.contract.Call(opts, &out, "l2TokenBridge")
+
+	if err != nil {
+		return *new(common.Address), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(common.Address)).(*common.Address)
+
+	return out0, err
+
+}
+
+// L2TokenBridge is a free data retrieval call binding the contract method 0x91c49bf8.
+//
+// Solidity: function l2TokenBridge() view returns(address)
+func (_L1StandardBridge *L1StandardBridgeSession) L2TokenBridge() (common.Address, error) {
+	return _L1StandardBridge.Contract.L2TokenBridge(&_L1StandardBridge.CallOpts)
+}
+
+// L2TokenBridge is a free data retrieval call binding the contract method 0x91c49bf8.
+//
+// Solidity: function l2TokenBridge() view returns(address)
+func (_L1StandardBridge *L1StandardBridgeCallerSession) L2TokenBridge() (common.Address, error) {
+	return _L1StandardBridge.Contract.L2TokenBridge(&_L1StandardBridge.CallOpts)
+}
+
+// Messenger is a free data retrieval call binding the contract method 0x3cb747bf.
+//
+// Solidity: function messenger() view returns(address)
+func (_L1StandardBridge *L1StandardBridgeCaller) Messenger(opts *bind.CallOpts) (common.Address, error) {
+	var out []interface{}
+	err := _L1StandardBridge.contract.Call(opts, &out, "messenger")
+
+	if err != nil {
+		return *new(common.Address), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(common.Address)).(*common.Address)
+
+	return out0, err
+
+}
+
+// Messenger is a free data retrieval call binding the contract method 0x3cb747bf.
+//
+// Solidity: function messenger() view returns(address)
+func (_L1StandardBridge *L1StandardBridgeSession) Messenger() (common.Address, error) {
+	return _L1StandardBridge.Contract.Messenger(&_L1StandardBridge.CallOpts)
+}
+
+// Messenger is a free data retrieval call binding the contract method 0x3cb747bf.
+//
+// Solidity: function messenger() view returns(address)
+func (_L1StandardBridge *L1StandardBridgeCallerSession) Messenger() (common.Address, error) {
+	return _L1StandardBridge.Contract.Messenger(&_L1StandardBridge.CallOpts)
+}
+
+// DepositERC20 is a paid mutator transaction binding the contract method 0x58a997f6.
+//
+// Solidity: function depositERC20(address _l1Token, address _l2Token, uint256 _amount, uint32 _l2Gas, bytes _data) returns()
+func (_L1StandardBridge *L1StandardBridgeTransactor) DepositERC20(opts *bind.TransactOpts, _l1Token common.Address, _l2Token common.Address, _amount *big.Int, _l2Gas uint32, _data []byte) (*types.Transaction, error) {
+	return _L1StandardBridge.contract.Transact(opts, "depositERC20", _l1Token, _l2Token, _amount, _l2Gas, _data)
+}
+
+// DepositERC20 is a paid mutator transaction binding the contract method 0x58a997f6.
+//
+// Solidity: function depositERC20(address _l1Token, address _l2Token, uint256 _amount, uint32 _l2Gas, bytes _data) returns()
+func (_L1StandardBridge *L1StandardBridgeSession) DepositERC20(_l1Token common.Address, _l2Token common.Address, _amount *big.Int, _l2Gas uint32, _data []byte) (*types.Transaction, error) {
+	return _L1StandardBridge.Contract.DepositERC20(&_L1StandardBridge.TransactOpts, _l1Token, _l2Token, _amount, _l2Gas, _data)
+}
+
+// DepositERC20 is a paid mutator transaction binding the contract method 0x58a997f6.
+//
+// Solidity: function depositERC20(address _l1Token, address _l2Token, uint256 _amount, uint32 _l2Gas, bytes _data) returns()
+func (_L1StandardBridge *L1StandardBridgeTransactorSession) DepositERC20(_l1Token common.Address, _l2Token common.Address, _amount *big.Int, _l2Gas uint32, _data []byte) (*types.Transaction, error) {
+	return _L1StandardBridge.Contract.DepositERC20(&_L1StandardBridge.TransactOpts, _l1Token, _l2Token, _amount, _l2Gas, _data)
+}
+
+// DepositERC20To is a paid mutator transaction binding the contract method 0x838b2520.
+//
+// Solidity: function depositERC20To(address _l1Token, address _l2Token, address _to, uint256 _amount, uint32 _l2Gas, bytes _data) returns()
+func (_L1StandardBridge *L1StandardBridgeTransactor) DepositERC20To(opts *bind.TransactOpts, _l1Token common.Address, _l2Token common.Address, _to common.Address, _amount *big.Int, _l2Gas uint32, _data []byte) (*types.Transaction, error) {
+	return _L1StandardBridge.contract.Transact(opts, "depositERC20To", _l1Token, _l2Token, _to, _amount, _l2Gas, _data)
+}
+
+// DepositERC20To is a paid mutator transaction binding the contract method 0x838b2520.
+//
+// Solidity: function depositERC20To(address _l1Token, address _l2Token, address _to, uint256 _amount, uint32 _l2Gas, bytes _data) returns()
+func (_L1StandardBridge *L1StandardBridgeSession) DepositERC20To(_l1Token common.Address, _l2Token common.Address, _to common.Address, _amount *big.Int, _l2Gas uint32, _data []byte) (*types.Transaction, error) {
+	return _L1StandardBridge.Contract.DepositERC20To(&_L1StandardBridge.TransactOpts, _l1Token, _l2Token, _to, _amount, _l2Gas, _data)
+}
+
+// DepositERC20To is a paid mutator transaction binding the contract method 0x838b2520.
+//
+// Solidity: function depositERC20To(address _l1Token, address _l2Token, address _to, uint256 _amount, uint32 _l2Gas, bytes _data) returns()
+func (_L1StandardBridge *L1StandardBridgeTransactorSession) DepositERC20To(_l1Token common.Address, _l2Token common.Address, _to common.Address, _amount *big.Int, _l2Gas uint32, _data []byte) (*types.Transaction, error) {
+	return _L1StandardBridge.Contract.DepositERC20To(&_L1StandardBridge.TransactOpts, _l1Token, _l2Token, _to, _amount, _l2Gas, _data)
+}
+
+// DepositETH is a paid mutator transaction binding the contract method 0xb1a1a882.
+//
+// Solidity: function depositETH(uint32 _l2Gas, bytes _data) payable returns()
+func (_L1StandardBridge *L1StandardBridgeTransactor) DepositETH(opts *bind.TransactOpts, _l2Gas uint32, _data []byte) (*types.Transaction, error) {
+	return _L1StandardBridge.contract.Transact(opts, "depositETH", _l2Gas, _data)
+}
+
+// DepositETH is a paid mutator transaction binding the contract method 0xb1a1a882.
+//
+// Solidity: function depositETH(uint32 _l2Gas, bytes _data) payable returns()
+func (_L1StandardBridge *L1StandardBridgeSession) DepositETH(_l2Gas uint32, _data []byte) (*types.Transaction, error) {
+	return _L1StandardBridge.Contract.DepositETH(&_L1StandardBridge.TransactOpts, _l2Gas, _data)
+}
+
+// DepositETH is a paid mutator transaction binding the contract method 0xb1a1a882.
+//
+// Solidity: function depositETH(uint32 _l2Gas, bytes _data) payable returns()
+func (_L1StandardBridge *L1StandardBridgeTransactorSession) DepositETH(_l2Gas uint32, _data []byte) (*types.Transaction, error) {
+	return _L1StandardBridge.Contract.DepositETH(&_L1StandardBridge.TransactOpts, _l2Gas, _data)
+}
+
+// DepositETHTo is a paid mutator transaction binding the contract method 0x9a2ac6d5.
+//
+// Solidity: function depositETHTo(address _to, uint32 _l2Gas, bytes _data) payable returns()
+func (_L1StandardBridge *L1StandardBridgeTransactor) DepositETHTo(opts *bind.TransactOpts, _to common.Address, _l2Gas uint32, _data []byte) (*types.Transaction, error) {
+	return _L1StandardBridge.contract.Transact(opts, "depositETHTo", _to, _l2Gas, _data)
+}
+
+// DepositETHTo is a paid mutator transaction binding the contract method 0x9a2ac6d5.
+//
+// Solidity: function depositETHTo(address _to, uint32 _l2Gas, bytes _data) payable returns()
+func (_L1StandardBridge *L1StandardBridgeSession) DepositETHTo(_to common.Address, _l2Gas uint32, _data []byte) (*types.Transaction, error) {
+	return _L1StandardBridge.Contract.DepositETHTo(&_L1StandardBridge.TransactOpts, _to, _l2Gas, _data)
+}
+
+// DepositETHTo is a paid mutator transaction binding the contract method 0x9a2ac6d5.
+//
+// Solidity: function depositETHTo(address _to, uint32 _l2Gas, bytes _data) payable returns()
+func (_L1StandardBridge *L1StandardBridgeTransactorSession) DepositETHTo(_to common.Address, _l2Gas uint32, _data []byte) (*types.Transaction, error) {
+	return _L1StandardBridge.Contract.DepositETHTo(&_L1StandardBridge.TransactOpts, _to, _l2Gas, _data)
+}
+
+// DonateETH is a paid mutator transaction binding the contract method 0x8b4c40b0.
+//
+// Solidity: function donateETH() payable returns()
+func (_L1StandardBridge *L1StandardBridgeTransactor) DonateETH(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _L1StandardBridge.contract.Transact(opts, "donateETH")
+}
+
+// DonateETH is a paid mutator transaction binding the contract method 0x8b4c40b0.
+//
+// Solidity: function donateETH() payable returns()
+func (_L1StandardBridge *L1StandardBridgeSession) DonateETH() (*types.Transaction, error) {
+	return _L1StandardBridge.Contract.DonateETH(&_L1StandardBridge.TransactOpts)
+}
+
+// DonateETH is a paid mutator transaction binding the contract method 0x8b4c40b0.
+//
+// Solidity: function donateETH() payable returns()
+func (_L1StandardBridge *L1StandardBridgeTransactorSession) DonateETH() (*types.Transaction, error) {
+	return _L1StandardBridge.Contract.DonateETH(&_L1StandardBridge.TransactOpts)
+}
+
+// FinalizeERC20Withdrawal is a paid mutator transaction binding the contract method 0xa9f9e675.
+//
+// Solidity: function finalizeERC20Withdrawal(address _l1Token, address _l2Token, address _from, address _to, uint256 _amount, bytes _data) returns()
+func (_L1StandardBridge *L1StandardBridgeTransactor) FinalizeERC20Withdrawal(opts *bind.TransactOpts, _l1Token common.Address, _l2Token common.Address, _from common.Address, _to common.Address, _amount *big.Int, _data []byte) (*types.Transaction, error) {
+	return _L1StandardBridge.contract.Transact(opts, "finalizeERC20Withdrawal", _l1Token, _l2Token, _from, _to, _amount, _data)
+}
+
+// FinalizeERC20Withdrawal is a paid mutator transaction binding the contract method 0xa9f9e675.
+//
+// Solidity: function finalizeERC20Withdrawal(address _l1Token, address _l2Token, address _from, address _to, uint256 _amount, bytes _data) returns()
+func (_L1StandardBridge *L1StandardBridgeSession) FinalizeERC20Withdrawal(_l1Token common.Address, _l2Token common.Address, _from common.Address, _to common.Address, _amount *big.Int, _data []byte) (*types.Transaction, error) {
+	return _L1StandardBridge.Contract.FinalizeERC20Withdrawal(&_L1StandardBridge.TransactOpts, _l1Token, _l2Token, _from, _to, _amount, _data)
+}
+
+// FinalizeERC20Withdrawal is a paid mutator transaction binding the contract method 0xa9f9e675.
+//
+// Solidity: function finalizeERC20Withdrawal(address _l1Token, address _l2Token, address _from, address _to, uint256 _amount, bytes _data) returns()
+func (_L1StandardBridge *L1StandardBridgeTransactorSession) FinalizeERC20Withdrawal(_l1Token common.Address, _l2Token common.Address, _from common.Address, _to common.Address, _amount *big.Int, _data []byte) (*types.Transaction, error) {
+	return _L1StandardBridge.Contract.FinalizeERC20Withdrawal(&_L1StandardBridge.TransactOpts, _l1Token, _l2Token, _from, _to, _amount, _data)
+}
+
+// FinalizeETHWithdrawal is a paid mutator transaction binding the contract method 0x1532ec34.
+//
+// Solidity: function finalizeETHWithdrawal(address _from, address _to, uint256 _amount, bytes _data) returns()
+func (_L1StandardBridge *L1StandardBridgeTransactor) FinalizeETHWithdrawal(opts *bind.TransactOpts, _from common.Address, _to common.Address, _amount *big.Int, _data []byte) (*types.Transaction, error) {
+	return _L1StandardBridge.contract.Transact(opts, "finalizeETHWithdrawal", _from, _to, _amount, _data)
+}
+
+// FinalizeETHWithdrawal is a paid mutator transaction binding the contract method 0x1532ec34.
+//
+// Solidity: function finalizeETHWithdrawal(address _from, address _to, uint256 _amount, bytes _data) returns()
+func (_L1StandardBridge *L1StandardBridgeSession) FinalizeETHWithdrawal(_from common.Address, _to common.Address, _amount *big.Int, _data []byte) (*types.Transaction, error) {
+	return _L1StandardBridge.Contract.FinalizeETHWithdrawal(&_L1StandardBridge.TransactOpts, _from, _to, _amount, _data)
+}
+
+// FinalizeETHWithdrawal is a paid mutator transaction binding the contract method 0x1532ec34.
+//
+// Solidity: function finalizeETHWithdrawal(address _from, address _to, uint256 _amount, bytes _data) returns()
+func (_L1StandardBridge *L1StandardBridgeTransactorSession) FinalizeETHWithdrawal(_from common.Address, _to common.Address, _amount *big.Int, _data []byte) (*types.Transaction, error) {
+	return _L1StandardBridge.Contract.FinalizeETHWithdrawal(&_L1StandardBridge.TransactOpts, _from, _to, _amount, _data)
+}
+
+// Initialize is a paid mutator transaction binding the contract method 0x485cc955.
+//
+// Solidity: function initialize(address _l1messenger, address _l2TokenBridge) returns()
+func (_L1StandardBridge *L1StandardBridgeTransactor) Initialize(opts *bind.TransactOpts, _l1messenger common.Address, _l2TokenBridge common.Address) (*types.Transaction, error) {
+	return _L1StandardBridge.contract.Transact(opts, "initialize", _l1messenger, _l2TokenBridge)
+}
+
+// Initialize is a paid mutator transaction binding the contract method 0x485cc955.
+//
+// Solidity: function initialize(address _l1messenger, address _l2TokenBridge) returns()
+func (_L1StandardBridge *L1StandardBridgeSession) Initialize(_l1messenger common.Address, _l2TokenBridge common.Address) (*types.Transaction, error) {
+	return _L1StandardBridge.Contract.Initialize(&_L1StandardBridge.TransactOpts, _l1messenger, _l2TokenBridge)
+}
+
+// Initialize is a paid mutator transaction binding the contract method 0x485cc955.
+//
+// Solidity: function initialize(address _l1messenger, address _l2TokenBridge) returns()
+func (_L1StandardBridge *L1StandardBridgeTransactorSession) Initialize(_l1messenger common.Address, _l2TokenBridge common.Address) (*types.Transaction, error) {
+	return _L1StandardBridge.Contract.Initialize(&_L1StandardBridge.TransactOpts, _l1messenger, _l2TokenBridge)
+}
+
+// Receive is a paid mutator transaction binding the contract receive function.
+//
+// Solidity: receive() payable returns()
+func (_L1StandardBridge *L1StandardBridgeTransactor) Receive(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _L1StandardBridge.contract.RawTransact(opts, nil) // calldata is disallowed for receive function
+}
+
+// Receive is a paid mutator transaction binding the contract receive function.
+//
+// Solidity: receive() payable returns()
+func (_L1StandardBridge *L1StandardBridgeSession) Receive() (*types.Transaction, error) {
+	return _L1StandardBridge.Contract.Receive(&_L1StandardBridge.TransactOpts)
+}
+
+// Receive is a paid mutator transaction binding the contract receive function.
+//
+// Solidity: receive() payable returns()
+func (_L1StandardBridge *L1StandardBridgeTransactorSession) Receive() (*types.Transaction, error) {
+	return _L1StandardBridge.Contract.Receive(&_L1StandardBridge.TransactOpts)
+}
+
+// L1StandardBridgeERC20DepositInitiatedIterator is returned from FilterERC20DepositInitiated and is used to iterate over the raw logs and unpacked data for ERC20DepositInitiated events raised by the L1StandardBridge contract.
+type L1StandardBridgeERC20DepositInitiatedIterator struct {
+	Event *L1StandardBridgeERC20DepositInitiated // Event containing the contract specifics and raw log
+
+	contract *bind.BoundContract // Generic contract to use for unpacking event data
+	event    string              // Event name to use for unpacking event data
+
+	logs chan types.Log        // Log channel receiving the found contract events
+	sub  ethereum.Subscription // Subscription for errors, completion and termination
+	done bool                  // Whether the subscription completed delivering logs
+	fail error                 // Occurred error to stop iteration
+}
+
+// Next advances the iterator to the subsequent event, returning whether there
+// are any more events found. In case of a retrieval or parsing error, false is
+// returned and Error() can be queried for the exact failure.
+func (it *L1StandardBridgeERC20DepositInitiatedIterator) Next() bool {
+	// If the iterator failed, stop iterating
+	if it.fail != nil {
+		return false
+	}
+	// If the iterator completed, deliver directly whatever's available
+	if it.done {
+		select {
+		case log := <-it.logs:
+			it.Event = new(L1StandardBridgeERC20DepositInitiated)
+			if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+				it.fail = err
+				return false
+			}
+			it.Event.Raw = log
+			return true
+
+		default:
+			return false
+		}
+	}
+	// Iterator still in progress, wait for either a data or an error event
+	select {
+	case log := <-it.logs:
+		it.Event = new(L1StandardBridgeERC20DepositInitiated)
+		if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+			it.fail = err
+			return false
+		}
+		it.Event.Raw = log
+		return true
+
+	case err := <-it.sub.Err():
+		it.done = true
+		it.fail = err
+		return it.Next()
+	}
+}
+
+// Error returns any retrieval or parsing error occurred during filtering.
+func (it *L1StandardBridgeERC20DepositInitiatedIterator) Error() error {
+	return it.fail
+}
+
+// Close terminates the iteration process, releasing any pending underlying
+// resources.
+func (it *L1StandardBridgeERC20DepositInitiatedIterator) Close() error {
+	it.sub.Unsubscribe()
+	return nil
+}
+
+// L1StandardBridgeERC20DepositInitiated represents a ERC20DepositInitiated event raised by the L1StandardBridge contract.
+type L1StandardBridgeERC20DepositInitiated struct {
+	L1Token common.Address
+	L2Token common.Address
+	From    common.Address
+	To      common.Address
+	Amount  *big.Int
+	Data    []byte
+	Raw     types.Log // Blockchain specific contextual infos
+}
+
+// FilterERC20DepositInitiated is a free log retrieval operation binding the contract event 0x718594027abd4eaed59f95162563e0cc6d0e8d5b86b1c7be8b1b0ac3343d0396.
+//
+// Solidity: event ERC20DepositInitiated(address indexed _l1Token, address indexed _l2Token, address indexed _from, address _to, uint256 _amount, bytes _data)
+func (_L1StandardBridge *L1StandardBridgeFilterer) FilterERC20DepositInitiated(opts *bind.FilterOpts, _l1Token []common.Address, _l2Token []common.Address, _from []common.Address) (*L1StandardBridgeERC20DepositInitiatedIterator, error) {
+
+	var _l1TokenRule []interface{}
+	for _, _l1TokenItem := range _l1Token {
+		_l1TokenRule = append(_l1TokenRule, _l1TokenItem)
+	}
+	var _l2TokenRule []interface{}
+	for _, _l2TokenItem := range _l2Token {
+		_l2TokenRule = append(_l2TokenRule, _l2TokenItem)
+	}
+	var _fromRule []interface{}
+	for _, _fromItem := range _from {
+		_fromRule = append(_fromRule, _fromItem)
+	}
+
+	logs, sub, err := _L1StandardBridge.contract.FilterLogs(opts, "ERC20DepositInitiated", _l1TokenRule, _l2TokenRule, _fromRule)
+	if err != nil {
+		return nil, err
+	}
+	return &L1StandardBridgeERC20DepositInitiatedIterator{contract: _L1StandardBridge.contract, event: "ERC20DepositInitiated", logs: logs, sub: sub}, nil
+}
+
+// WatchERC20DepositInitiated is a free log subscription operation binding the contract event 0x718594027abd4eaed59f95162563e0cc6d0e8d5b86b1c7be8b1b0ac3343d0396.
+//
+// Solidity: event ERC20DepositInitiated(address indexed _l1Token, address indexed _l2Token, address indexed _from, address _to, uint256 _amount, bytes _data)
+func (_L1StandardBridge *L1StandardBridgeFilterer) WatchERC20DepositInitiated(opts *bind.WatchOpts, sink chan<- *L1StandardBridgeERC20DepositInitiated, _l1Token []common.Address, _l2Token []common.Address, _from []common.Address) (event.Subscription, error) {
+
+	var _l1TokenRule []interface{}
+	for _, _l1TokenItem := range _l1Token {
+		_l1TokenRule = append(_l1TokenRule, _l1TokenItem)
+	}
+	var _l2TokenRule []interface{}
+	for _, _l2TokenItem := range _l2Token {
+		_l2TokenRule = append(_l2TokenRule, _l2TokenItem)
+	}
+	var _fromRule []interface{}
+	for _, _fromItem := range _from {
+		_fromRule = append(_fromRule, _fromItem)
+	}
+
+	logs, sub, err := _L1StandardBridge.contract.WatchLogs(opts, "ERC20DepositInitiated", _l1TokenRule, _l2TokenRule, _fromRule)
+	if err != nil {
+		return nil, err
+	}
+	return event.NewSubscription(func(quit <-chan struct{}) error {
+		defer sub.Unsubscribe()
+		for {
+			select {
+			case log := <-logs:
+				// New log arrived, parse the event and forward to the user
+				event := new(L1StandardBridgeERC20DepositInitiated)
+				if err := _L1StandardBridge.contract.UnpackLog(event, "ERC20DepositInitiated", log); err != nil {
+					return err
+				}
+				event.Raw = log
+
+				select {
+				case sink <- event:
+				case err := <-sub.Err():
+					return err
+				case <-quit:
+					return nil
+				}
+			case err := <-sub.Err():
+				return err
+			case <-quit:
+				return nil
+			}
+		}
+	}), nil
+}
+
+// ParseERC20DepositInitiated is a log parse operation binding the contract event 0x718594027abd4eaed59f95162563e0cc6d0e8d5b86b1c7be8b1b0ac3343d0396.
+//
+// Solidity: event ERC20DepositInitiated(address indexed _l1Token, address indexed _l2Token, address indexed _from, address _to, uint256 _amount, bytes _data)
+func (_L1StandardBridge *L1StandardBridgeFilterer) ParseERC20DepositInitiated(log types.Log) (*L1StandardBridgeERC20DepositInitiated, error) {
+	event := new(L1StandardBridgeERC20DepositInitiated)
+	if err := _L1StandardBridge.contract.UnpackLog(event, "ERC20DepositInitiated", log); err != nil {
+		return nil, err
+	}
+	event.Raw = log
+	return event, nil
+}
+
+// L1StandardBridgeERC20WithdrawalFinalizedIterator is returned from FilterERC20WithdrawalFinalized and is used to iterate over the raw logs and unpacked data for ERC20WithdrawalFinalized events raised by the L1StandardBridge contract.
+type L1StandardBridgeERC20WithdrawalFinalizedIterator struct {
+	Event *L1StandardBridgeERC20WithdrawalFinalized // Event containing the contract specifics and raw log
+
+	contract *bind.BoundContract // Generic contract to use for unpacking event data
+	event    string              // Event name to use for unpacking event data
+
+	logs chan types.Log        // Log channel receiving the found contract events
+	sub  ethereum.Subscription // Subscription for errors, completion and termination
+	done bool                  // Whether the subscription completed delivering logs
+	fail error                 // Occurred error to stop iteration
+}
+
+// Next advances the iterator to the subsequent event, returning whether there
+// are any more events found. In case of a retrieval or parsing error, false is
+// returned and Error() can be queried for the exact failure.
+func (it *L1StandardBridgeERC20WithdrawalFinalizedIterator) Next() bool {
+	// If the iterator failed, stop iterating
+	if it.fail != nil {
+		return false
+	}
+	// If the iterator completed, deliver directly whatever's available
+	if it.done {
+		select {
+		case log := <-it.logs:
+			it.Event = new(L1StandardBridgeERC20WithdrawalFinalized)
+			if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+				it.fail = err
+				return false
+			}
+			it.Event.Raw = log
+			return true
+
+		default:
+			return false
+		}
+	}
+	// Iterator still in progress, wait for either a data or an error event
+	select {
+	case log := <-it.logs:
+		it.Event = new(L1StandardBridgeERC20WithdrawalFinalized)
+		if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+			it.fail = err
+			return false
+		}
+		it.Event.Raw = log
+		return true
+
+	case err := <-it.sub.Err():
+		it.done = true
+		it.fail = err
+		return it.Next()
+	}
+}
+
+// Error returns any retrieval or parsing error occurred during filtering.
+func (it *L1StandardBridgeERC20WithdrawalFinalizedIterator) Error() error {
+	return it.fail
+}
+
+// Close terminates the iteration process, releasing any pending underlying
+// resources.
+func (it *L1StandardBridgeERC20WithdrawalFinalizedIterator) Close() error {
+	it.sub.Unsubscribe()
+	return nil
+}
+
+// L1StandardBridgeERC20WithdrawalFinalized represents a ERC20WithdrawalFinalized event raised by the L1StandardBridge contract.
+type L1StandardBridgeERC20WithdrawalFinalized struct {
+	L1Token common.Address
+	L2Token common.Address
+	From    common.Address
+	To      common.Address
+	Amount  *big.Int
+	Data    []byte
+	Raw     types.Log // Blockchain specific contextual infos
+}
+
+// FilterERC20WithdrawalFinalized is a free log retrieval operation binding the contract event 0x3ceee06c1e37648fcbb6ed52e17b3e1f275a1f8c7b22a84b2b84732431e046b3.
+//
+// Solidity: event ERC20WithdrawalFinalized(address indexed _l1Token, address indexed _l2Token, address indexed _from, address _to, uint256 _amount, bytes _data)
+func (_L1StandardBridge *L1StandardBridgeFilterer) FilterERC20WithdrawalFinalized(opts *bind.FilterOpts, _l1Token []common.Address, _l2Token []common.Address, _from []common.Address) (*L1StandardBridgeERC20WithdrawalFinalizedIterator, error) {
+
+	var _l1TokenRule []interface{}
+	for _, _l1TokenItem := range _l1Token {
+		_l1TokenRule = append(_l1TokenRule, _l1TokenItem)
+	}
+	var _l2TokenRule []interface{}
+	for _, _l2TokenItem := range _l2Token {
+		_l2TokenRule = append(_l2TokenRule, _l2TokenItem)
+	}
+	var _fromRule []interface{}
+	for _, _fromItem := range _from {
+		_fromRule = append(_fromRule, _fromItem)
+	}
+
+	logs, sub, err := _L1StandardBridge.contract.FilterLogs(opts, "ERC20WithdrawalFinalized", _l1TokenRule, _l2TokenRule, _fromRule)
+	if err != nil {
+		return nil, err
+	}
+	return &L1StandardBridgeERC20WithdrawalFinalizedIterator{contract: _L1StandardBridge.contract, event: "ERC20WithdrawalFinalized", logs: logs, sub: sub}, nil
+}
+
+// WatchERC20WithdrawalFinalized is a free log subscription operation binding the contract event 0x3ceee06c1e37648fcbb6ed52e17b3e1f275a1f8c7b22a84b2b84732431e046b3.
+//
+// Solidity: event ERC20WithdrawalFinalized(address indexed _l1Token, address indexed _l2Token, address indexed _from, address _to, uint256 _amount, bytes _data)
+func (_L1StandardBridge *L1StandardBridgeFilterer) WatchERC20WithdrawalFinalized(opts *bind.WatchOpts, sink chan<- *L1StandardBridgeERC20WithdrawalFinalized, _l1Token []common.Address, _l2Token []common.Address, _from []common.Address) (event.Subscription, error) {
+
+	var _l1TokenRule []interface{}
+	for _, _l1TokenItem := range _l1Token {
+		_l1TokenRule = append(_l1TokenRule, _l1TokenItem)
+	}
+	var _l2TokenRule []interface{}
+	for _, _l2TokenItem := range _l2Token {
+		_l2TokenRule = append(_l2TokenRule, _l2TokenItem)
+	}
+	var _fromRule []interface{}
+	for _, _fromItem := range _from {
+		_fromRule = append(_fromRule, _fromItem)
+	}
+
+	logs, sub, err := _L1StandardBridge.contract.WatchLogs(opts, "ERC20WithdrawalFinalized", _l1TokenRule, _l2TokenRule, _fromRule)
+	if err != nil {
+		return nil, err
+	}
+	return event.NewSubscription(func(quit <-chan struct{}) error {
+		defer sub.Unsubscribe()
+		for {
+			select {
+			case log := <-logs:
+				// New log arrived, parse the event and forward to the user
+				event := new(L1StandardBridgeERC20WithdrawalFinalized)
+				if err := _L1StandardBridge.contract.UnpackLog(event, "ERC20WithdrawalFinalized", log); err != nil {
+					return err
+				}
+				event.Raw = log
+
+				select {
+				case sink <- event:
+				case err := <-sub.Err():
+					return err
+				case <-quit:
+					return nil
+				}
+			case err := <-sub.Err():
+				return err
+			case <-quit:
+				return nil
+			}
+		}
+	}), nil
+}
+
+// ParseERC20WithdrawalFinalized is a log parse operation binding the contract event 0x3ceee06c1e37648fcbb6ed52e17b3e1f275a1f8c7b22a84b2b84732431e046b3.
+//
+// Solidity: event ERC20WithdrawalFinalized(address indexed _l1Token, address indexed _l2Token, address indexed _from, address _to, uint256 _amount, bytes _data)
+func (_L1StandardBridge *L1StandardBridgeFilterer) ParseERC20WithdrawalFinalized(log types.Log) (*L1StandardBridgeERC20WithdrawalFinalized, error) {
+	event := new(L1StandardBridgeERC20WithdrawalFinalized)
+	if err := _L1StandardBridge.contract.UnpackLog(event, "ERC20WithdrawalFinalized", log); err != nil {
+		return nil, err
+	}
+	event.Raw = log
+	return event, nil
+}
+
+// L1StandardBridgeETHDepositInitiatedIterator is returned from FilterETHDepositInitiated and is used to iterate over the raw logs and unpacked data for ETHDepositInitiated events raised by the L1StandardBridge contract.
+type L1StandardBridgeETHDepositInitiatedIterator struct {
+	Event *L1StandardBridgeETHDepositInitiated // Event containing the contract specifics and raw log
+
+	contract *bind.BoundContract // Generic contract to use for unpacking event data
+	event    string              // Event name to use for unpacking event data
+
+	logs chan types.Log        // Log channel receiving the found contract events
+	sub  ethereum.Subscription // Subscription for errors, completion and termination
+	done bool                  // Whether the subscription completed delivering logs
+	fail error                 // Occurred error to stop iteration
+}
+
+// Next advances the iterator to the subsequent event, returning whether there
+// are any more events found. In case of a retrieval or parsing error, false is
+// returned and Error() can be queried for the exact failure.
+func (it *L1StandardBridgeETHDepositInitiatedIterator) Next() bool {
+	// If the iterator failed, stop iterating
+	if it.fail != nil {
+		return false
+	}
+	// If the iterator completed, deliver directly whatever's available
+	if it.done {
+		select {
+		case log := <-it.logs:
+			it.Event = new(L1StandardBridgeETHDepositInitiated)
+			if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+				it.fail = err
+				return false
+			}
+			it.Event.Raw = log
+			return true
+
+		default:
+			return false
+		}
+	}
+	// Iterator still in progress, wait for either a data or an error event
+	select {
+	case log := <-it.logs:
+		it.Event = new(L1StandardBridgeETHDepositInitiated)
+		if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+			it.fail = err
+			return false
+		}
+		it.Event.Raw = log
+		return true
+
+	case err := <-it.sub.Err():
+		it.done = true
+		it.fail = err
+		return it.Next()
+	}
+}
+
+// Error returns any retrieval or parsing error occurred during filtering.
+func (it *L1StandardBridgeETHDepositInitiatedIterator) Error() error {
+	return it.fail
+}
+
+// Close terminates the iteration process, releasing any pending underlying
+// resources.
+func (it *L1StandardBridgeETHDepositInitiatedIterator) Close() error {
+	it.sub.Unsubscribe()
+	return nil
+}
+
+// L1StandardBridgeETHDepositInitiated represents a ETHDepositInitiated event raised by the L1StandardBridge contract.
+type L1StandardBridgeETHDepositInitiated struct {
+	From   common.Address
+	To     common.Address
+	Amount *big.Int
+	Data   []byte
+	Raw    types.Log // Blockchain specific contextual infos
+}
+
+// FilterETHDepositInitiated is a free log retrieval operation binding the contract event 0x35d79ab81f2b2017e19afb5c5571778877782d7a8786f5907f93b0f4702f4f23.
+//
+// Solidity: event ETHDepositInitiated(address indexed _from, address indexed _to, uint256 _amount, bytes _data)
+func (_L1StandardBridge *L1StandardBridgeFilterer) FilterETHDepositInitiated(opts *bind.FilterOpts, _from []common.Address, _to []common.Address) (*L1StandardBridgeETHDepositInitiatedIterator, error) {
+
+	var _fromRule []interface{}
+	for _, _fromItem := range _from {
+		_fromRule = append(_fromRule, _fromItem)
+	}
+	var _toRule []interface{}
+	for _, _toItem := range _to {
+		_toRule = append(_toRule, _toItem)
+	}
+
+	logs, sub, err := _L1StandardBridge.contract.FilterLogs(opts, "ETHDepositInitiated", _fromRule, _toRule)
+	if err != nil {
+		return nil, err
+	}
+	return &L1StandardBridgeETHDepositInitiatedIterator{contract: _L1StandardBridge.contract, event: "ETHDepositInitiated", logs: logs, sub: sub}, nil
+}
+
+// WatchETHDepositInitiated is a free log subscription operation binding the contract event 0x35d79ab81f2b2017e19afb5c5571778877782d7a8786f5907f93b0f4702f4f23.
+//
+// Solidity: event ETHDepositInitiated(address indexed _from, address indexed _to, uint256 _amount, bytes _data)
+func (_L1StandardBridge *L1StandardBridgeFilterer) WatchETHDepositInitiated(opts *bind.WatchOpts, sink chan<- *L1StandardBridgeETHDepositInitiated, _from []common.Address, _to []common.Address) (event.Subscription, error) {
+
+	var _fromRule []interface{}
+	for _, _fromItem := range _from {
+		_fromRule = append(_fromRule, _fromItem)
+	}
+	var _toRule []interface{}
+	for _, _toItem := range _to {
+		_toRule = append(_toRule, _toItem)
+	}
+
+	logs, sub, err := _L1StandardBridge.contract.WatchLogs(opts, "ETHDepositInitiated", _fromRule, _toRule)
+	if err != nil {
+		return nil, err
+	}
+	return event.NewSubscription(func(quit <-chan struct{}) error {
+		defer sub.Unsubscribe()
+		for {
+			select {
+			case log := <-logs:
+				// New log arrived, parse the event and forward to the user
+				event := new(L1StandardBridgeETHDepositInitiated)
+				if err := _L1StandardBridge.contract.UnpackLog(event, "ETHDepositInitiated", log); err != nil {
+					return err
+				}
+				event.Raw = log
+
+				select {
+				case sink <- event:
+				case err := <-sub.Err():
+					return err
+				case <-quit:
+					return nil
+				}
+			case err := <-sub.Err():
+				return err
+			case <-quit:
+				return nil
+			}
+		}
+	}), nil
+}
+
+// ParseETHDepositInitiated is a log parse operation binding the contract event 0x35d79ab81f2b2017e19afb5c5571778877782d7a8786f5907f93b0f4702f4f23.
+//
+// Solidity: event ETHDepositInitiated(address indexed _from, address indexed _to, uint256 _amount, bytes _data)
+func (_L1StandardBridge *L1StandardBridgeFilterer) ParseETHDepositInitiated(log types.Log) (*L1StandardBridgeETHDepositInitiated, error) {
+	event := new(L1StandardBridgeETHDepositInitiated)
+	if err := _L1StandardBridge.contract.UnpackLog(event, "ETHDepositInitiated", log); err != nil {
+		return nil, err
+	}
+	event.Raw = log
+	return event, nil
+}
+
+// L1StandardBridgeETHWithdrawalFinalizedIterator is returned from FilterETHWithdrawalFinalized and is used to iterate over the raw logs and unpacked data for ETHWithdrawalFinalized events raised by the L1StandardBridge contract.
+type L1StandardBridgeETHWithdrawalFinalizedIterator struct {
+	Event *L1StandardBridgeETHWithdrawalFinalized // Event containing the contract specifics and raw log
+
+	contract *bind.BoundContract // Generic contract to use for unpacking event data
+	event    string              // Event name to use for unpacking event data
+
+	logs chan types.Log        // Log channel receiving the found contract events
+	sub  ethereum.Subscription // Subscription for errors, completion and termination
+	done bool                  // Whether the subscription completed delivering logs
+	fail error                 // Occurred error to stop iteration
+}
+
+// Next advances the iterator to the subsequent event, returning whether there
+// are any more events found. In case of a retrieval or parsing error, false is
+// returned and Error() can be queried for the exact failure.
+func (it *L1StandardBridgeETHWithdrawalFinalizedIterator) Next() bool {
+	// If the iterator failed, stop iterating
+	if it.fail != nil {
+		return false
+	}
+	// If the iterator completed, deliver directly whatever's available
+	if it.done {
+		select {
+		case log := <-it.logs:
+			it.Event = new(L1StandardBridgeETHWithdrawalFinalized)
+			if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+				it.fail = err
+				return false
+			}
+			it.Event.Raw = log
+			return true
+
+		default:
+			return false
+		}
+	}
+	// Iterator still in progress, wait for either a data or an error event
+	select {
+	case log := <-it.logs:
+		it.Event = new(L1StandardBridgeETHWithdrawalFinalized)
+		if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+			it.fail = err
+			return false
+		}
+		it.Event.Raw = log
+		return true
+
+	case err := <-it.sub.Err():
+		it.done = true
+		it.fail = err
+		return it.Next()
+	}
+}
+
+// Error returns any retrieval or parsing error occurred during filtering.
+func (it *L1StandardBridgeETHWithdrawalFinalizedIterator) Error() error {
+	return it.fail
+}
+
+// Close terminates the iteration process, releasing any pending underlying
+// resources.
+func (it *L1StandardBridgeETHWithdrawalFinalizedIterator) Close() error {
+	it.sub.Unsubscribe()
+	return nil
+}
+
+// L1StandardBridgeETHWithdrawalFinalized represents a ETHWithdrawalFinalized event raised by the L1StandardBridge contract.
+type L1StandardBridgeETHWithdrawalFinalized struct {
+	From   common.Address
+	To     common.Address
+	Amount *big.Int
+	Data   []byte
+	Raw    types.Log // Blockchain specific contextual infos
+}
+
+// FilterETHWithdrawalFinalized is a free log retrieval operation binding the contract event 0x2ac69ee804d9a7a0984249f508dfab7cb2534b465b6ce1580f99a38ba9c5e631.
+//
+// Solidity: event ETHWithdrawalFinalized(address indexed _from, address indexed _to, uint256 _amount, bytes _data)
+func (_L1StandardBridge *L1StandardBridgeFilterer) FilterETHWithdrawalFinalized(opts *bind.FilterOpts, _from []common.Address, _to []common.Address) (*L1StandardBridgeETHWithdrawalFinalizedIterator, error) {
+
+	var _fromRule []interface{}
+	for _, _fromItem := range _from {
+		_fromRule = append(_fromRule, _fromItem)
+	}
+	var _toRule []interface{}
+	for _, _toItem := range _to {
+		_toRule = append(_toRule, _toItem)
+	}
+
+	logs, sub, err := _L1StandardBridge.contract.FilterLogs(opts, "ETHWithdrawalFinalized", _fromRule, _toRule)
+	if err != nil {
+		return nil, err
+	}
+	return &L1StandardBridgeETHWithdrawalFinalizedIterator{contract: _L1StandardBridge.contract, event: "ETHWithdrawalFinalized", logs: logs, sub: sub}, nil
+}
+
+// WatchETHWithdrawalFinalized is a free log subscription operation binding the contract event 0x2ac69ee804d9a7a0984249f508dfab7cb2534b465b6ce1580f99a38ba9c5e631.
+//
+// Solidity: event ETHWithdrawalFinalized(address indexed _from, address indexed _to, uint256 _amount, bytes _data)
+func (_L1StandardBridge *L1StandardBridgeFilterer) WatchETHWithdrawalFinalized(opts *bind.WatchOpts, sink chan<- *L1StandardBridgeETHWithdrawalFinalized, _from []common.Address, _to []common.Address) (event.Subscription, error) {
+
+	var _fromRule []interface{}
+	for _, _fromItem := range _from {
+		_fromRule = append(_fromRule, _fromItem)
+	}
+	var _toRule []interface{}
+	for _, _toItem := range _to {
+		_toRule = append(_toRule, _toItem)
+	}
+
+	logs, sub, err := _L1StandardBridge.contract.WatchLogs(opts, "ETHWithdrawalFinalized", _fromRule, _toRule)
+	if err != nil {
+		return nil, err
+	}
+	return event.NewSubscription(func(quit <-chan struct{}) error {
+		defer sub.Unsubscribe()
+		for {
+			select {
+			case log := <-logs:
+				// New log arrived, parse the event and forward to the user
+				event := new(L1StandardBridgeETHWithdrawalFinalized)
+				if err := _L1StandardBridge.contract.UnpackLog(event, "ETHWithdrawalFinalized", log); err != nil {
+					return err
+				}
+				event.Raw = log
+
+				select {
+				case sink <- event:
+				case err := <-sub.Err():
+					return err
+				case <-quit:
+					return nil
+				}
+			case err := <-sub.Err():
+				return err
+			case <-quit:
+				return nil
+			}
+		}
+	}), nil
+}
+
+// ParseETHWithdrawalFinalized is a log parse operation binding the contract event 0x2ac69ee804d9a7a0984249f508dfab7cb2534b465b6ce1580f99a38ba9c5e631.
+//
+// Solidity: event ETHWithdrawalFinalized(address indexed _from, address indexed _to, uint256 _amount, bytes _data)
+func (_L1StandardBridge *L1StandardBridgeFilterer) ParseETHWithdrawalFinalized(log types.Log) (*L1StandardBridgeETHWithdrawalFinalized, error) {
+	event := new(L1StandardBridgeETHWithdrawalFinalized)
+	if err := _L1StandardBridge.contract.UnpackLog(event, "ETHWithdrawalFinalized", log); err != nil {
+		return nil, err
+	}
+	event.Raw = log
+	return event, nil
+}

go/indexer/bindings/l1erc20/l1erc20.go

+// Code generated - DO NOT EDIT.
+// This file is a generated binding and any manual changes will be lost.
+
+package l1erc20
+
+import (
+	"errors"
+	"math/big"
+	"strings"
+
+	ethereum "github.com/ethereum/go-ethereum"
+	"github.com/ethereum/go-ethereum/accounts/abi"
+	"github.com/ethereum/go-ethereum/accounts/abi/bind"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/event"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var (
+	_ = errors.New
+	_ = big.NewInt
+	_ = strings.NewReader
+	_ = ethereum.NotFound
+	_ = bind.Bind
+	_ = common.Big1
+	_ = types.BloomLookup
+	_ = event.NewSubscription
+)
+
+// L1ERC20MetaData contains all meta data concerning the L1ERC20 contract.
+var L1ERC20MetaData = &bind.MetaData{
+	ABI: "[{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"_initialAmount\",\"type\":\"uint256\"},{\"internalType\":\"string\",\"name\":\"_tokenName\",\"type\":\"string\"},{\"internalType\":\"uint8\",\"name\":\"_decimalUnits\",\"type\":\"uint8\"},{\"internalType\":\"string\",\"name\":\"_tokenSymbol\",\"type\":\"string\"}],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_owner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_spender\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"_value\",\"type\":\"uint256\"}],\"name\":\"Approval\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_from\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_to\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"_value\",\"type\":\"uint256\"}],\"name\":\"Transfer\",\"type\":\"event\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_owner\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"_spender\",\"type\":\"address\"}],\"name\":\"allowance\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"remaining\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"name\":\"allowed\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_spender\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"_value\",\"type\":\"uint256\"}],\"name\":\"approve\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"success\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_owner\",\"type\":\"address\"}],\"name\":\"balanceOf\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"balance\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"name\":\"balances\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"decimals\",\"outputs\":[{\"internalType\":\"uint8\",\"name\":\"\",\"type\":\"uint8\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"destroy\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"name\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"symbol\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"totalSupply\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"_value\",\"type\":\"uint256\"}],\"name\":\"transfer\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"success\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"_to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"_value\",\"type\":\"uint256\"}],\"name\":\"transferFrom\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"success\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}]",
+	Bin: "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",
+}
+
+// L1ERC20ABI is the input ABI used to generate the binding from.
+// Deprecated: Use L1ERC20MetaData.ABI instead.
+var L1ERC20ABI = L1ERC20MetaData.ABI
+
+// L1ERC20Bin is the compiled bytecode used for deploying new contracts.
+// Deprecated: Use L1ERC20MetaData.Bin instead.
+var L1ERC20Bin = L1ERC20MetaData.Bin
+
+// DeployL1ERC20 deploys a new Ethereum contract, binding an instance of L1ERC20 to it.
+func DeployL1ERC20(auth *bind.TransactOpts, backend bind.ContractBackend, _initialAmount *big.Int, _tokenName string, _decimalUnits uint8, _tokenSymbol string) (common.Address, *types.Transaction, *L1ERC20, error) {
+	parsed, err := L1ERC20MetaData.GetAbi()
+	if err != nil {
+		return common.Address{}, nil, nil, err
+	}
+	if parsed == nil {
+		return common.Address{}, nil, nil, errors.New("GetABI returned nil")
+	}
+
+	address, tx, contract, err := bind.DeployContract(auth, *parsed, common.FromHex(L1ERC20Bin), backend, _initialAmount, _tokenName, _decimalUnits, _tokenSymbol)
+	if err != nil {
+		return common.Address{}, nil, nil, err
+	}
+	return address, tx, &L1ERC20{L1ERC20Caller: L1ERC20Caller{contract: contract}, L1ERC20Transactor: L1ERC20Transactor{contract: contract}, L1ERC20Filterer: L1ERC20Filterer{contract: contract}}, nil
+}
+
+// L1ERC20 is an auto generated Go binding around an Ethereum contract.
+type L1ERC20 struct {
+	L1ERC20Caller     // Read-only binding to the contract
+	L1ERC20Transactor // Write-only binding to the contract
+	L1ERC20Filterer   // Log filterer for contract events
+}
+
+// L1ERC20Caller is an auto generated read-only Go binding around an Ethereum contract.
+type L1ERC20Caller struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// L1ERC20Transactor is an auto generated write-only Go binding around an Ethereum contract.
+type L1ERC20Transactor struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// L1ERC20Filterer is an auto generated log filtering Go binding around an Ethereum contract events.
+type L1ERC20Filterer struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// L1ERC20Session is an auto generated Go binding around an Ethereum contract,
+// with pre-set call and transact options.
+type L1ERC20Session struct {
+	Contract     *L1ERC20          // Generic contract binding to set the session for
+	CallOpts     bind.CallOpts     // Call options to use throughout this session
+	TransactOpts bind.TransactOpts // Transaction auth options to use throughout this session
+}
+
+// L1ERC20CallerSession is an auto generated read-only Go binding around an Ethereum contract,
+// with pre-set call options.
+type L1ERC20CallerSession struct {
+	Contract *L1ERC20Caller // Generic contract caller binding to set the session for
+	CallOpts bind.CallOpts  // Call options to use throughout this session
+}
+
+// L1ERC20TransactorSession is an auto generated write-only Go binding around an Ethereum contract,
+// with pre-set transact options.
+type L1ERC20TransactorSession struct {
+	Contract     *L1ERC20Transactor // Generic contract transactor binding to set the session for
+	TransactOpts bind.TransactOpts  // Transaction auth options to use throughout this session
+}
+
+// L1ERC20Raw is an auto generated low-level Go binding around an Ethereum contract.
+type L1ERC20Raw struct {
+	Contract *L1ERC20 // Generic contract binding to access the raw methods on
+}
+
+// L1ERC20CallerRaw is an auto generated low-level read-only Go binding around an Ethereum contract.
+type L1ERC20CallerRaw struct {
+	Contract *L1ERC20Caller // Generic read-only contract binding to access the raw methods on
+}
+
+// L1ERC20TransactorRaw is an auto generated low-level write-only Go binding around an Ethereum contract.
+type L1ERC20TransactorRaw struct {
+	Contract *L1ERC20Transactor // Generic write-only contract binding to access the raw methods on
+}
+
+// NewL1ERC20 creates a new instance of L1ERC20, bound to a specific deployed contract.
+func NewL1ERC20(address common.Address, backend bind.ContractBackend) (*L1ERC20, error) {
+	contract, err := bindL1ERC20(address, backend, backend, backend)
+	if err != nil {
+		return nil, err
+	}
+	return &L1ERC20{L1ERC20Caller: L1ERC20Caller{contract: contract}, L1ERC20Transactor: L1ERC20Transactor{contract: contract}, L1ERC20Filterer: L1ERC20Filterer{contract: contract}}, nil
+}
+
+// NewL1ERC20Caller creates a new read-only instance of L1ERC20, bound to a specific deployed contract.
+func NewL1ERC20Caller(address common.Address, caller bind.ContractCaller) (*L1ERC20Caller, error) {
+	contract, err := bindL1ERC20(address, caller, nil, nil)
+	if err != nil {
+		return nil, err
+	}
+	return &L1ERC20Caller{contract: contract}, nil
+}
+
+// NewL1ERC20Transactor creates a new write-only instance of L1ERC20, bound to a specific deployed contract.
+func NewL1ERC20Transactor(address common.Address, transactor bind.ContractTransactor) (*L1ERC20Transactor, error) {
+	contract, err := bindL1ERC20(address, nil, transactor, nil)
+	if err != nil {
+		return nil, err
+	}
+	return &L1ERC20Transactor{contract: contract}, nil
+}
+
+// NewL1ERC20Filterer creates a new log filterer instance of L1ERC20, bound to a specific deployed contract.
+func NewL1ERC20Filterer(address common.Address, filterer bind.ContractFilterer) (*L1ERC20Filterer, error) {
+	contract, err := bindL1ERC20(address, nil, nil, filterer)
+	if err != nil {
+		return nil, err
+	}
+	return &L1ERC20Filterer{contract: contract}, nil
+}
+
+// bindL1ERC20 binds a generic wrapper to an already deployed contract.
+func bindL1ERC20(address common.Address, caller bind.ContractCaller, transactor bind.ContractTransactor, filterer bind.ContractFilterer) (*bind.BoundContract, error) {
+	parsed, err := abi.JSON(strings.NewReader(L1ERC20ABI))
+	if err != nil {
+		return nil, err
+	}
+	return bind.NewBoundContract(address, parsed, caller, transactor, filterer), nil
+}
+
+// Call invokes the (constant) contract method with params as input values and
+// sets the output to result. The result type might be a single field for simple
+// returns, a slice of interfaces for anonymous returns and a struct for named
+// returns.
+func (_L1ERC20 *L1ERC20Raw) Call(opts *bind.CallOpts, result *[]interface{}, method string, params ...interface{}) error {
+	return _L1ERC20.Contract.L1ERC20Caller.contract.Call(opts, result, method, params...)
+}
+
+// Transfer initiates a plain transaction to move funds to the contract, calling
+// its default method if one is available.
+func (_L1ERC20 *L1ERC20Raw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _L1ERC20.Contract.L1ERC20Transactor.contract.Transfer(opts)
+}
+
+// Transact invokes the (paid) contract method with params as input values.
+func (_L1ERC20 *L1ERC20Raw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
+	return _L1ERC20.Contract.L1ERC20Transactor.contract.Transact(opts, method, params...)
+}
+
+// Call invokes the (constant) contract method with params as input values and
+// sets the output to result. The result type might be a single field for simple
+// returns, a slice of interfaces for anonymous returns and a struct for named
+// returns.
+func (_L1ERC20 *L1ERC20CallerRaw) Call(opts *bind.CallOpts, result *[]interface{}, method string, params ...interface{}) error {
+	return _L1ERC20.Contract.contract.Call(opts, result, method, params...)
+}
+
+// Transfer initiates a plain transaction to move funds to the contract, calling
+// its default method if one is available.
+func (_L1ERC20 *L1ERC20TransactorRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _L1ERC20.Contract.contract.Transfer(opts)
+}
+
+// Transact invokes the (paid) contract method with params as input values.
+func (_L1ERC20 *L1ERC20TransactorRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
+	return _L1ERC20.Contract.contract.Transact(opts, method, params...)
+}
+
+// Allowance is a free data retrieval call binding the contract method 0xdd62ed3e.
+//
+// Solidity: function allowance(address _owner, address _spender) view returns(uint256 remaining)
+func (_L1ERC20 *L1ERC20Caller) Allowance(opts *bind.CallOpts, _owner common.Address, _spender common.Address) (*big.Int, error) {
+	var out []interface{}
+	err := _L1ERC20.contract.Call(opts, &out, "allowance", _owner, _spender)
+
+	if err != nil {
+		return *new(*big.Int), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(*big.Int)).(**big.Int)
+
+	return out0, err
+
+}
+
+// Allowance is a free data retrieval call binding the contract method 0xdd62ed3e.
+//
+// Solidity: function allowance(address _owner, address _spender) view returns(uint256 remaining)
+func (_L1ERC20 *L1ERC20Session) Allowance(_owner common.Address, _spender common.Address) (*big.Int, error) {
+	return _L1ERC20.Contract.Allowance(&_L1ERC20.CallOpts, _owner, _spender)
+}
+
+// Allowance is a free data retrieval call binding the contract method 0xdd62ed3e.
+//
+// Solidity: function allowance(address _owner, address _spender) view returns(uint256 remaining)
+func (_L1ERC20 *L1ERC20CallerSession) Allowance(_owner common.Address, _spender common.Address) (*big.Int, error) {
+	return _L1ERC20.Contract.Allowance(&_L1ERC20.CallOpts, _owner, _spender)
+}
+
+// Allowed is a free data retrieval call binding the contract method 0x5c658165.
+//
+// Solidity: function allowed(address , address ) view returns(uint256)
+func (_L1ERC20 *L1ERC20Caller) Allowed(opts *bind.CallOpts, arg0 common.Address, arg1 common.Address) (*big.Int, error) {
+	var out []interface{}
+	err := _L1ERC20.contract.Call(opts, &out, "allowed", arg0, arg1)
+
+	if err != nil {
+		return *new(*big.Int), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(*big.Int)).(**big.Int)
+
+	return out0, err
+
+}
+
+// Allowed is a free data retrieval call binding the contract method 0x5c658165.
+//
+// Solidity: function allowed(address , address ) view returns(uint256)
+func (_L1ERC20 *L1ERC20Session) Allowed(arg0 common.Address, arg1 common.Address) (*big.Int, error) {
+	return _L1ERC20.Contract.Allowed(&_L1ERC20.CallOpts, arg0, arg1)
+}
+
+// Allowed is a free data retrieval call binding the contract method 0x5c658165.
+//
+// Solidity: function allowed(address , address ) view returns(uint256)
+func (_L1ERC20 *L1ERC20CallerSession) Allowed(arg0 common.Address, arg1 common.Address) (*big.Int, error) {
+	return _L1ERC20.Contract.Allowed(&_L1ERC20.CallOpts, arg0, arg1)
+}
+
+// BalanceOf is a free data retrieval call binding the contract method 0x70a08231.
+//
+// Solidity: function balanceOf(address _owner) view returns(uint256 balance)
+func (_L1ERC20 *L1ERC20Caller) BalanceOf(opts *bind.CallOpts, _owner common.Address) (*big.Int, error) {
+	var out []interface{}
+	err := _L1ERC20.contract.Call(opts, &out, "balanceOf", _owner)
+
+	if err != nil {
+		return *new(*big.Int), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(*big.Int)).(**big.Int)
+
+	return out0, err
+
+}
+
+// BalanceOf is a free data retrieval call binding the contract method 0x70a08231.
+//
+// Solidity: function balanceOf(address _owner) view returns(uint256 balance)
+func (_L1ERC20 *L1ERC20Session) BalanceOf(_owner common.Address) (*big.Int, error) {
+	return _L1ERC20.Contract.BalanceOf(&_L1ERC20.CallOpts, _owner)
+}
+
+// BalanceOf is a free data retrieval call binding the contract method 0x70a08231.
+//
+// Solidity: function balanceOf(address _owner) view returns(uint256 balance)
+func (_L1ERC20 *L1ERC20CallerSession) BalanceOf(_owner common.Address) (*big.Int, error) {
+	return _L1ERC20.Contract.BalanceOf(&_L1ERC20.CallOpts, _owner)
+}
+
+// Balances is a free data retrieval call binding the contract method 0x27e235e3.
+//
+// Solidity: function balances(address ) view returns(uint256)
+func (_L1ERC20 *L1ERC20Caller) Balances(opts *bind.CallOpts, arg0 common.Address) (*big.Int, error) {
+	var out []interface{}
+	err := _L1ERC20.contract.Call(opts, &out, "balances", arg0)
+
+	if err != nil {
+		return *new(*big.Int), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(*big.Int)).(**big.Int)
+
+	return out0, err
+
+}
+
+// Balances is a free data retrieval call binding the contract method 0x27e235e3.
+//
+// Solidity: function balances(address ) view returns(uint256)
+func (_L1ERC20 *L1ERC20Session) Balances(arg0 common.Address) (*big.Int, error) {
+	return _L1ERC20.Contract.Balances(&_L1ERC20.CallOpts, arg0)
+}
+
+// Balances is a free data retrieval call binding the contract method 0x27e235e3.
+//
+// Solidity: function balances(address ) view returns(uint256)
+func (_L1ERC20 *L1ERC20CallerSession) Balances(arg0 common.Address) (*big.Int, error) {
+	return _L1ERC20.Contract.Balances(&_L1ERC20.CallOpts, arg0)
+}
+
+// Decimals is a free data retrieval call binding the contract method 0x313ce567.
+//
+// Solidity: function decimals() view returns(uint8)
+func (_L1ERC20 *L1ERC20Caller) Decimals(opts *bind.CallOpts) (uint8, error) {
+	var out []interface{}
+	err := _L1ERC20.contract.Call(opts, &out, "decimals")
+
+	if err != nil {
+		return *new(uint8), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(uint8)).(*uint8)
+
+	return out0, err
+
+}
+
+// Decimals is a free data retrieval call binding the contract method 0x313ce567.
+//
+// Solidity: function decimals() view returns(uint8)
+func (_L1ERC20 *L1ERC20Session) Decimals() (uint8, error) {
+	return _L1ERC20.Contract.Decimals(&_L1ERC20.CallOpts)
+}
+
+// Decimals is a free data retrieval call binding the contract method 0x313ce567.
+//
+// Solidity: function decimals() view returns(uint8)
+func (_L1ERC20 *L1ERC20CallerSession) Decimals() (uint8, error) {
+	return _L1ERC20.Contract.Decimals(&_L1ERC20.CallOpts)
+}
+
+// Name is a free data retrieval call binding the contract method 0x06fdde03.
+//
+// Solidity: function name() view returns(string)
+func (_L1ERC20 *L1ERC20Caller) Name(opts *bind.CallOpts) (string, error) {
+	var out []interface{}
+	err := _L1ERC20.contract.Call(opts, &out, "name")
+
+	if err != nil {
+		return *new(string), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(string)).(*string)
+
+	return out0, err
+
+}
+
+// Name is a free data retrieval call binding the contract method 0x06fdde03.
+//
+// Solidity: function name() view returns(string)
+func (_L1ERC20 *L1ERC20Session) Name() (string, error) {
+	return _L1ERC20.Contract.Name(&_L1ERC20.CallOpts)
+}
+
+// Name is a free data retrieval call binding the contract method 0x06fdde03.
+//
+// Solidity: function name() view returns(string)
+func (_L1ERC20 *L1ERC20CallerSession) Name() (string, error) {
+	return _L1ERC20.Contract.Name(&_L1ERC20.CallOpts)
+}
+
+// Symbol is a free data retrieval call binding the contract method 0x95d89b41.
+//
+// Solidity: function symbol() view returns(string)
+func (_L1ERC20 *L1ERC20Caller) Symbol(opts *bind.CallOpts) (string, error) {
+	var out []interface{}
+	err := _L1ERC20.contract.Call(opts, &out, "symbol")
+
+	if err != nil {
+		return *new(string), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(string)).(*string)
+
+	return out0, err
+
+}
+
+// Symbol is a free data retrieval call binding the contract method 0x95d89b41.
+//
+// Solidity: function symbol() view returns(string)
+func (_L1ERC20 *L1ERC20Session) Symbol() (string, error) {
+	return _L1ERC20.Contract.Symbol(&_L1ERC20.CallOpts)
+}
+
+// Symbol is a free data retrieval call binding the contract method 0x95d89b41.
+//
+// Solidity: function symbol() view returns(string)
+func (_L1ERC20 *L1ERC20CallerSession) Symbol() (string, error) {
+	return _L1ERC20.Contract.Symbol(&_L1ERC20.CallOpts)
+}
+
+// TotalSupply is a free data retrieval call binding the contract method 0x18160ddd.
+//
+// Solidity: function totalSupply() view returns(uint256)
+func (_L1ERC20 *L1ERC20Caller) TotalSupply(opts *bind.CallOpts) (*big.Int, error) {
+	var out []interface{}
+	err := _L1ERC20.contract.Call(opts, &out, "totalSupply")
+
+	if err != nil {
+		return *new(*big.Int), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(*big.Int)).(**big.Int)
+
+	return out0, err
+
+}
+
+// TotalSupply is a free data retrieval call binding the contract method 0x18160ddd.
+//
+// Solidity: function totalSupply() view returns(uint256)
+func (_L1ERC20 *L1ERC20Session) TotalSupply() (*big.Int, error) {
+	return _L1ERC20.Contract.TotalSupply(&_L1ERC20.CallOpts)
+}
+
+// TotalSupply is a free data retrieval call binding the contract method 0x18160ddd.
+//
+// Solidity: function totalSupply() view returns(uint256)
+func (_L1ERC20 *L1ERC20CallerSession) TotalSupply() (*big.Int, error) {
+	return _L1ERC20.Contract.TotalSupply(&_L1ERC20.CallOpts)
+}
+
+// Approve is a paid mutator transaction binding the contract method 0x095ea7b3.
+//
+// Solidity: function approve(address _spender, uint256 _value) returns(bool success)
+func (_L1ERC20 *L1ERC20Transactor) Approve(opts *bind.TransactOpts, _spender common.Address, _value *big.Int) (*types.Transaction, error) {
+	return _L1ERC20.contract.Transact(opts, "approve", _spender, _value)
+}
+
+// Approve is a paid mutator transaction binding the contract method 0x095ea7b3.
+//
+// Solidity: function approve(address _spender, uint256 _value) returns(bool success)
+func (_L1ERC20 *L1ERC20Session) Approve(_spender common.Address, _value *big.Int) (*types.Transaction, error) {
+	return _L1ERC20.Contract.Approve(&_L1ERC20.TransactOpts, _spender, _value)
+}
+
+// Approve is a paid mutator transaction binding the contract method 0x095ea7b3.
+//
+// Solidity: function approve(address _spender, uint256 _value) returns(bool success)
+func (_L1ERC20 *L1ERC20TransactorSession) Approve(_spender common.Address, _value *big.Int) (*types.Transaction, error) {
+	return _L1ERC20.Contract.Approve(&_L1ERC20.TransactOpts, _spender, _value)
+}
+
+// Destroy is a paid mutator transaction binding the contract method 0x83197ef0.
+//
+// Solidity: function destroy() returns()
+func (_L1ERC20 *L1ERC20Transactor) Destroy(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _L1ERC20.contract.Transact(opts, "destroy")
+}
+
+// Destroy is a paid mutator transaction binding the contract method 0x83197ef0.
+//
+// Solidity: function destroy() returns()
+func (_L1ERC20 *L1ERC20Session) Destroy() (*types.Transaction, error) {
+	return _L1ERC20.Contract.Destroy(&_L1ERC20.TransactOpts)
+}
+
+// Destroy is a paid mutator transaction binding the contract method 0x83197ef0.
+//
+// Solidity: function destroy() returns()
+func (_L1ERC20 *L1ERC20TransactorSession) Destroy() (*types.Transaction, error) {
+	return _L1ERC20.Contract.Destroy(&_L1ERC20.TransactOpts)
+}
+
+// Transfer is a paid mutator transaction binding the contract method 0xa9059cbb.
+//
+// Solidity: function transfer(address _to, uint256 _value) returns(bool success)
+func (_L1ERC20 *L1ERC20Transactor) Transfer(opts *bind.TransactOpts, _to common.Address, _value *big.Int) (*types.Transaction, error) {
+	return _L1ERC20.contract.Transact(opts, "transfer", _to, _value)
+}
+
+// Transfer is a paid mutator transaction binding the contract method 0xa9059cbb.
+//
+// Solidity: function transfer(address _to, uint256 _value) returns(bool success)
+func (_L1ERC20 *L1ERC20Session) Transfer(_to common.Address, _value *big.Int) (*types.Transaction, error) {
+	return _L1ERC20.Contract.Transfer(&_L1ERC20.TransactOpts, _to, _value)
+}
+
+// Transfer is a paid mutator transaction binding the contract method 0xa9059cbb.
+//
+// Solidity: function transfer(address _to, uint256 _value) returns(bool success)
+func (_L1ERC20 *L1ERC20TransactorSession) Transfer(_to common.Address, _value *big.Int) (*types.Transaction, error) {
+	return _L1ERC20.Contract.Transfer(&_L1ERC20.TransactOpts, _to, _value)
+}
+
+// TransferFrom is a paid mutator transaction binding the contract method 0x23b872dd.
+//
+// Solidity: function transferFrom(address _from, address _to, uint256 _value) returns(bool success)
+func (_L1ERC20 *L1ERC20Transactor) TransferFrom(opts *bind.TransactOpts, _from common.Address, _to common.Address, _value *big.Int) (*types.Transaction, error) {
+	return _L1ERC20.contract.Transact(opts, "transferFrom", _from, _to, _value)
+}
+
+// TransferFrom is a paid mutator transaction binding the contract method 0x23b872dd.
+//
+// Solidity: function transferFrom(address _from, address _to, uint256 _value) returns(bool success)
+func (_L1ERC20 *L1ERC20Session) TransferFrom(_from common.Address, _to common.Address, _value *big.Int) (*types.Transaction, error) {
+	return _L1ERC20.Contract.TransferFrom(&_L1ERC20.TransactOpts, _from, _to, _value)
+}
+
+// TransferFrom is a paid mutator transaction binding the contract method 0x23b872dd.
+//
+// Solidity: function transferFrom(address _from, address _to, uint256 _value) returns(bool success)
+func (_L1ERC20 *L1ERC20TransactorSession) TransferFrom(_from common.Address, _to common.Address, _value *big.Int) (*types.Transaction, error) {
+	return _L1ERC20.Contract.TransferFrom(&_L1ERC20.TransactOpts, _from, _to, _value)
+}
+
+// L1ERC20ApprovalIterator is returned from FilterApproval and is used to iterate over the raw logs and unpacked data for Approval events raised by the L1ERC20 contract.
+type L1ERC20ApprovalIterator struct {
+	Event *L1ERC20Approval // Event containing the contract specifics and raw log
+
+	contract *bind.BoundContract // Generic contract to use for unpacking event data
+	event    string              // Event name to use for unpacking event data
+
+	logs chan types.Log        // Log channel receiving the found contract events
+	sub  ethereum.Subscription // Subscription for errors, completion and termination
+	done bool                  // Whether the subscription completed delivering logs
+	fail error                 // Occurred error to stop iteration
+}
+
+// Next advances the iterator to the subsequent event, returning whether there
+// are any more events found. In case of a retrieval or parsing error, false is
+// returned and Error() can be queried for the exact failure.
+func (it *L1ERC20ApprovalIterator) Next() bool {
+	// If the iterator failed, stop iterating
+	if it.fail != nil {
+		return false
+	}
+	// If the iterator completed, deliver directly whatever's available
+	if it.done {
+		select {
+		case log := <-it.logs:
+			it.Event = new(L1ERC20Approval)
+			if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+				it.fail = err
+				return false
+			}
+			it.Event.Raw = log
+			return true
+
+		default:
+			return false
+		}
+	}
+	// Iterator still in progress, wait for either a data or an error event
+	select {
+	case log := <-it.logs:
+		it.Event = new(L1ERC20Approval)
+		if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+			it.fail = err
+			return false
+		}
+		it.Event.Raw = log
+		return true
+
+	case err := <-it.sub.Err():
+		it.done = true
+		it.fail = err
+		return it.Next()
+	}
+}
+
+// Error returns any retrieval or parsing error occurred during filtering.
+func (it *L1ERC20ApprovalIterator) Error() error {
+	return it.fail
+}
+
+// Close terminates the iteration process, releasing any pending underlying
+// resources.
+func (it *L1ERC20ApprovalIterator) Close() error {
+	it.sub.Unsubscribe()
+	return nil
+}
+
+// L1ERC20Approval represents a Approval event raised by the L1ERC20 contract.
+type L1ERC20Approval struct {
+	Owner   common.Address
+	Spender common.Address
+	Value   *big.Int
+	Raw     types.Log // Blockchain specific contextual infos
+}
+
+// FilterApproval is a free log retrieval operation binding the contract event 0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925.
+//
+// Solidity: event Approval(address indexed _owner, address indexed _spender, uint256 _value)
+func (_L1ERC20 *L1ERC20Filterer) FilterApproval(opts *bind.FilterOpts, _owner []common.Address, _spender []common.Address) (*L1ERC20ApprovalIterator, error) {
+
+	var _ownerRule []interface{}
+	for _, _ownerItem := range _owner {
+		_ownerRule = append(_ownerRule, _ownerItem)
+	}
+	var _spenderRule []interface{}
+	for _, _spenderItem := range _spender {
+		_spenderRule = append(_spenderRule, _spenderItem)
+	}
+
+	logs, sub, err := _L1ERC20.contract.FilterLogs(opts, "Approval", _ownerRule, _spenderRule)
+	if err != nil {
+		return nil, err
+	}
+	return &L1ERC20ApprovalIterator{contract: _L1ERC20.contract, event: "Approval", logs: logs, sub: sub}, nil
+}
+
+// WatchApproval is a free log subscription operation binding the contract event 0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925.
+//
+// Solidity: event Approval(address indexed _owner, address indexed _spender, uint256 _value)
+func (_L1ERC20 *L1ERC20Filterer) WatchApproval(opts *bind.WatchOpts, sink chan<- *L1ERC20Approval, _owner []common.Address, _spender []common.Address) (event.Subscription, error) {
+
+	var _ownerRule []interface{}
+	for _, _ownerItem := range _owner {
+		_ownerRule = append(_ownerRule, _ownerItem)
+	}
+	var _spenderRule []interface{}
+	for _, _spenderItem := range _spender {
+		_spenderRule = append(_spenderRule, _spenderItem)
+	}
+
+	logs, sub, err := _L1ERC20.contract.WatchLogs(opts, "Approval", _ownerRule, _spenderRule)
+	if err != nil {
+		return nil, err
+	}
+	return event.NewSubscription(func(quit <-chan struct{}) error {
+		defer sub.Unsubscribe()
+		for {
+			select {
+			case log := <-logs:
+				// New log arrived, parse the event and forward to the user
+				event := new(L1ERC20Approval)
+				if err := _L1ERC20.contract.UnpackLog(event, "Approval", log); err != nil {
+					return err
+				}
+				event.Raw = log
+
+				select {
+				case sink <- event:
+				case err := <-sub.Err():
+					return err
+				case <-quit:
+					return nil
+				}
+			case err := <-sub.Err():
+				return err
+			case <-quit:
+				return nil
+			}
+		}
+	}), nil
+}
+
+// ParseApproval is a log parse operation binding the contract event 0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925.
+//
+// Solidity: event Approval(address indexed _owner, address indexed _spender, uint256 _value)
+func (_L1ERC20 *L1ERC20Filterer) ParseApproval(log types.Log) (*L1ERC20Approval, error) {
+	event := new(L1ERC20Approval)
+	if err := _L1ERC20.contract.UnpackLog(event, "Approval", log); err != nil {
+		return nil, err
+	}
+	event.Raw = log
+	return event, nil
+}
+
+// L1ERC20TransferIterator is returned from FilterTransfer and is used to iterate over the raw logs and unpacked data for Transfer events raised by the L1ERC20 contract.
+type L1ERC20TransferIterator struct {
+	Event *L1ERC20Transfer // Event containing the contract specifics and raw log
+
+	contract *bind.BoundContract // Generic contract to use for unpacking event data
+	event    string              // Event name to use for unpacking event data
+
+	logs chan types.Log        // Log channel receiving the found contract events
+	sub  ethereum.Subscription // Subscription for errors, completion and termination
+	done bool                  // Whether the subscription completed delivering logs
+	fail error                 // Occurred error to stop iteration
+}
+
+// Next advances the iterator to the subsequent event, returning whether there
+// are any more events found. In case of a retrieval or parsing error, false is
+// returned and Error() can be queried for the exact failure.
+func (it *L1ERC20TransferIterator) Next() bool {
+	// If the iterator failed, stop iterating
+	if it.fail != nil {
+		return false
+	}
+	// If the iterator completed, deliver directly whatever's available
+	if it.done {
+		select {
+		case log := <-it.logs:
+			it.Event = new(L1ERC20Transfer)
+			if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+				it.fail = err
+				return false
+			}
+			it.Event.Raw = log
+			return true
+
+		default:
+			return false
+		}
+	}
+	// Iterator still in progress, wait for either a data or an error event
+	select {
+	case log := <-it.logs:
+		it.Event = new(L1ERC20Transfer)
+		if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+			it.fail = err
+			return false
+		}
+		it.Event.Raw = log
+		return true
+
+	case err := <-it.sub.Err():
+		it.done = true
+		it.fail = err
+		return it.Next()
+	}
+}
+
+// Error returns any retrieval or parsing error occurred during filtering.
+func (it *L1ERC20TransferIterator) Error() error {
+	return it.fail
+}
+
+// Close terminates the iteration process, releasing any pending underlying
+// resources.
+func (it *L1ERC20TransferIterator) Close() error {
+	it.sub.Unsubscribe()
+	return nil
+}
+
+// L1ERC20Transfer represents a Transfer event raised by the L1ERC20 contract.
+type L1ERC20Transfer struct {
+	From  common.Address
+	To    common.Address
+	Value *big.Int
+	Raw   types.Log // Blockchain specific contextual infos
+}
+
+// FilterTransfer is a free log retrieval operation binding the contract event 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef.
+//
+// Solidity: event Transfer(address indexed _from, address indexed _to, uint256 _value)
+func (_L1ERC20 *L1ERC20Filterer) FilterTransfer(opts *bind.FilterOpts, _from []common.Address, _to []common.Address) (*L1ERC20TransferIterator, error) {
+
+	var _fromRule []interface{}
+	for _, _fromItem := range _from {
+		_fromRule = append(_fromRule, _fromItem)
+	}
+	var _toRule []interface{}
+	for _, _toItem := range _to {
+		_toRule = append(_toRule, _toItem)
+	}
+
+	logs, sub, err := _L1ERC20.contract.FilterLogs(opts, "Transfer", _fromRule, _toRule)
+	if err != nil {
+		return nil, err
+	}
+	return &L1ERC20TransferIterator{contract: _L1ERC20.contract, event: "Transfer", logs: logs, sub: sub}, nil
+}
+
+// WatchTransfer is a free log subscription operation binding the contract event 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef.
+//
+// Solidity: event Transfer(address indexed _from, address indexed _to, uint256 _value)
+func (_L1ERC20 *L1ERC20Filterer) WatchTransfer(opts *bind.WatchOpts, sink chan<- *L1ERC20Transfer, _from []common.Address, _to []common.Address) (event.Subscription, error) {
+
+	var _fromRule []interface{}
+	for _, _fromItem := range _from {
+		_fromRule = append(_fromRule, _fromItem)
+	}
+	var _toRule []interface{}
+	for _, _toItem := range _to {
+		_toRule = append(_toRule, _toItem)
+	}
+
+	logs, sub, err := _L1ERC20.contract.WatchLogs(opts, "Transfer", _fromRule, _toRule)
+	if err != nil {
+		return nil, err
+	}
+	return event.NewSubscription(func(quit <-chan struct{}) error {
+		defer sub.Unsubscribe()
+		for {
+			select {
+			case log := <-logs:
+				// New log arrived, parse the event and forward to the user
+				event := new(L1ERC20Transfer)
+				if err := _L1ERC20.contract.UnpackLog(event, "Transfer", log); err != nil {
+					return err
+				}
+				event.Raw = log
+
+				select {
+				case sink <- event:
+				case err := <-sub.Err():
+					return err
+				case <-quit:
+					return nil
+				}
+			case err := <-sub.Err():
+				return err
+			case <-quit:
+				return nil
+			}
+		}
+	}), nil
+}
+
+// ParseTransfer is a log parse operation binding the contract event 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef.
+//
+// Solidity: event Transfer(address indexed _from, address indexed _to, uint256 _value)
+func (_L1ERC20 *L1ERC20Filterer) ParseTransfer(log types.Log) (*L1ERC20Transfer, error) {
+	event := new(L1ERC20Transfer)
+	if err := _L1ERC20.contract.UnpackLog(event, "Transfer", log); err != nil {
+		return nil, err
+	}
+	event.Raw = log
+	return event, nil
+}

go/indexer/bindings/l2bridge/l2_standard_bridge.go

+// Code generated - DO NOT EDIT.
+// This file is a generated binding and any manual changes will be lost.
+
+package l2bridge
+
+import (
+	"math/big"
+	"strings"
+
+	ethereum "github.com/ethereum-optimism/optimism/l2geth"
+	"github.com/ethereum-optimism/optimism/l2geth/accounts/abi"
+	"github.com/ethereum-optimism/optimism/l2geth/accounts/abi/bind"
+	"github.com/ethereum-optimism/optimism/l2geth/common"
+	"github.com/ethereum-optimism/optimism/l2geth/core/types"
+	"github.com/ethereum-optimism/optimism/l2geth/event"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var (
+	_ = big.NewInt
+	_ = strings.NewReader
+	_ = ethereum.NotFound
+	_ = abi.U256
+	_ = bind.Bind
+	_ = common.Big1
+	_ = types.BloomLookup
+	_ = event.NewSubscription
+)
+
+// L2StandardBridgeABI is the input ABI used to generate the binding from.
+const L2StandardBridgeABI = "[{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_l2CrossDomainMessenger\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"_l1TokenBridge\",\"type\":\"address\"}],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_l1Token\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_l2Token\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_from\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"address\",\"name\":\"_to\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"bytes\",\"name\":\"_data\",\"type\":\"bytes\"}],\"name\":\"DepositFailed\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_l1Token\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_l2Token\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_from\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"address\",\"name\":\"_to\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"bytes\",\"name\":\"_data\",\"type\":\"bytes\"}],\"name\":\"DepositFinalized\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_l1Token\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_l2Token\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_from\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"address\",\"name\":\"_to\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"bytes\",\"name\":\"_data\",\"type\":\"bytes\"}],\"name\":\"WithdrawalInitiated\",\"type\":\"event\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_l1Token\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"_l2Token\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"_from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"_to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"},{\"internalType\":\"bytes\",\"name\":\"_data\",\"type\":\"bytes\"}],\"name\":\"finalizeDeposit\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"l1TokenBridge\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"messenger\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_l2Token\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"},{\"internalType\":\"uint32\",\"name\":\"_l1Gas\",\"type\":\"uint32\"},{\"internalType\":\"bytes\",\"name\":\"_data\",\"type\":\"bytes\"}],\"name\":\"withdraw\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_l2Token\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"_to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"},{\"internalType\":\"uint32\",\"name\":\"_l1Gas\",\"type\":\"uint32\"},{\"internalType\":\"bytes\",\"name\":\"_data\",\"type\":\"bytes\"}],\"name\":\"withdrawTo\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}]"
+
+// L2StandardBridgeBin is the compiled bytecode used for deploying new contracts.
+var L2StandardBridgeBin = "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+
+// DeployL2StandardBridge deploys a new Ethereum contract, binding an instance of L2StandardBridge to it.
+func DeployL2StandardBridge(auth *bind.TransactOpts, backend bind.ContractBackend, _l2CrossDomainMessenger common.Address, _l1TokenBridge common.Address) (common.Address, *types.Transaction, *L2StandardBridge, error) {
+	parsed, err := abi.JSON(strings.NewReader(L2StandardBridgeABI))
+	if err != nil {
+		return common.Address{}, nil, nil, err
+	}
+
+	address, tx, contract, err := bind.DeployContract(auth, parsed, common.FromHex(L2StandardBridgeBin), backend, _l2CrossDomainMessenger, _l1TokenBridge)
+	if err != nil {
+		return common.Address{}, nil, nil, err
+	}
+	return address, tx, &L2StandardBridge{L2StandardBridgeCaller: L2StandardBridgeCaller{contract: contract}, L2StandardBridgeTransactor: L2StandardBridgeTransactor{contract: contract}, L2StandardBridgeFilterer: L2StandardBridgeFilterer{contract: contract}}, nil
+}
+
+// L2StandardBridge is an auto generated Go binding around an Ethereum contract.
+type L2StandardBridge struct {
+	L2StandardBridgeCaller     // Read-only binding to the contract
+	L2StandardBridgeTransactor // Write-only binding to the contract
+	L2StandardBridgeFilterer   // Log filterer for contract events
+}
+
+// L2StandardBridgeCaller is an auto generated read-only Go binding around an Ethereum contract.
+type L2StandardBridgeCaller struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// L2StandardBridgeTransactor is an auto generated write-only Go binding around an Ethereum contract.
+type L2StandardBridgeTransactor struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// L2StandardBridgeFilterer is an auto generated log filtering Go binding around an Ethereum contract events.
+type L2StandardBridgeFilterer struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// L2StandardBridgeSession is an auto generated Go binding around an Ethereum contract,
+// with pre-set call and transact options.
+type L2StandardBridgeSession struct {
+	Contract     *L2StandardBridge // Generic contract binding to set the session for
+	CallOpts     bind.CallOpts     // Call options to use throughout this session
+	TransactOpts bind.TransactOpts // Transaction auth options to use throughout this session
+}
+
+// L2StandardBridgeCallerSession is an auto generated read-only Go binding around an Ethereum contract,
+// with pre-set call options.
+type L2StandardBridgeCallerSession struct {
+	Contract *L2StandardBridgeCaller // Generic contract caller binding to set the session for
+	CallOpts bind.CallOpts           // Call options to use throughout this session
+}
+
+// L2StandardBridgeTransactorSession is an auto generated write-only Go binding around an Ethereum contract,
+// with pre-set transact options.
+type L2StandardBridgeTransactorSession struct {
+	Contract     *L2StandardBridgeTransactor // Generic contract transactor binding to set the session for
+	TransactOpts bind.TransactOpts           // Transaction auth options to use throughout this session
+}
+
+// L2StandardBridgeRaw is an auto generated low-level Go binding around an Ethereum contract.
+type L2StandardBridgeRaw struct {
+	Contract *L2StandardBridge // Generic contract binding to access the raw methods on
+}
+
+// L2StandardBridgeCallerRaw is an auto generated low-level read-only Go binding around an Ethereum contract.
+type L2StandardBridgeCallerRaw struct {
+	Contract *L2StandardBridgeCaller // Generic read-only contract binding to access the raw methods on
+}
+
+// L2StandardBridgeTransactorRaw is an auto generated low-level write-only Go binding around an Ethereum contract.
+type L2StandardBridgeTransactorRaw struct {
+	Contract *L2StandardBridgeTransactor // Generic write-only contract binding to access the raw methods on
+}
+
+// NewL2StandardBridge creates a new instance of L2StandardBridge, bound to a specific deployed contract.
+func NewL2StandardBridge(address common.Address, backend bind.ContractBackend) (*L2StandardBridge, error) {
+	contract, err := bindL2StandardBridge(address, backend, backend, backend)
+	if err != nil {
+		return nil, err
+	}
+	return &L2StandardBridge{L2StandardBridgeCaller: L2StandardBridgeCaller{contract: contract}, L2StandardBridgeTransactor: L2StandardBridgeTransactor{contract: contract}, L2StandardBridgeFilterer: L2StandardBridgeFilterer{contract: contract}}, nil
+}
+
+// NewL2StandardBridgeCaller creates a new read-only instance of L2StandardBridge, bound to a specific deployed contract.
+func NewL2StandardBridgeCaller(address common.Address, caller bind.ContractCaller) (*L2StandardBridgeCaller, error) {
+	contract, err := bindL2StandardBridge(address, caller, nil, nil)
+	if err != nil {
+		return nil, err
+	}
+	return &L2StandardBridgeCaller{contract: contract}, nil
+}
+
+// NewL2StandardBridgeTransactor creates a new write-only instance of L2StandardBridge, bound to a specific deployed contract.
+func NewL2StandardBridgeTransactor(address common.Address, transactor bind.ContractTransactor) (*L2StandardBridgeTransactor, error) {
+	contract, err := bindL2StandardBridge(address, nil, transactor, nil)
+	if err != nil {
+		return nil, err
+	}
+	return &L2StandardBridgeTransactor{contract: contract}, nil
+}
+
+// NewL2StandardBridgeFilterer creates a new log filterer instance of L2StandardBridge, bound to a specific deployed contract.
+func NewL2StandardBridgeFilterer(address common.Address, filterer bind.ContractFilterer) (*L2StandardBridgeFilterer, error) {
+	contract, err := bindL2StandardBridge(address, nil, nil, filterer)
+	if err != nil {
+		return nil, err
+	}
+	return &L2StandardBridgeFilterer{contract: contract}, nil
+}
+
+// bindL2StandardBridge binds a generic wrapper to an already deployed contract.
+func bindL2StandardBridge(address common.Address, caller bind.ContractCaller, transactor bind.ContractTransactor, filterer bind.ContractFilterer) (*bind.BoundContract, error) {
+	parsed, err := abi.JSON(strings.NewReader(L2StandardBridgeABI))
+	if err != nil {
+		return nil, err
+	}
+	return bind.NewBoundContract(address, parsed, caller, transactor, filterer), nil
+}
+
+// Call invokes the (constant) contract method with params as input values and
+// sets the output to result. The result type might be a single field for simple
+// returns, a slice of interfaces for anonymous returns and a struct for named
+// returns.
+func (_L2StandardBridge *L2StandardBridgeRaw) Call(opts *bind.CallOpts, result interface{}, method string, params ...interface{}) error {
+	return _L2StandardBridge.Contract.L2StandardBridgeCaller.contract.Call(opts, result, method, params...)
+}
+
+// Transfer initiates a plain transaction to move funds to the contract, calling
+// its default method if one is available.
+func (_L2StandardBridge *L2StandardBridgeRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _L2StandardBridge.Contract.L2StandardBridgeTransactor.contract.Transfer(opts)
+}
+
+// Transact invokes the (paid) contract method with params as input values.
+func (_L2StandardBridge *L2StandardBridgeRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
+	return _L2StandardBridge.Contract.L2StandardBridgeTransactor.contract.Transact(opts, method, params...)
+}
+
+// Call invokes the (constant) contract method with params as input values and
+// sets the output to result. The result type might be a single field for simple
+// returns, a slice of interfaces for anonymous returns and a struct for named
+// returns.
+func (_L2StandardBridge *L2StandardBridgeCallerRaw) Call(opts *bind.CallOpts, result interface{}, method string, params ...interface{}) error {
+	return _L2StandardBridge.Contract.contract.Call(opts, result, method, params...)
+}
+
+// Transfer initiates a plain transaction to move funds to the contract, calling
+// its default method if one is available.
+func (_L2StandardBridge *L2StandardBridgeTransactorRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _L2StandardBridge.Contract.contract.Transfer(opts)
+}
+
+// Transact invokes the (paid) contract method with params as input values.
+func (_L2StandardBridge *L2StandardBridgeTransactorRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
+	return _L2StandardBridge.Contract.contract.Transact(opts, method, params...)
+}
+
+// L1TokenBridge is a free data retrieval call binding the contract method 0x36c717c1.
+//
+// Solidity: function l1TokenBridge() constant returns(address)
+func (_L2StandardBridge *L2StandardBridgeCaller) L1TokenBridge(opts *bind.CallOpts) (common.Address, error) {
+	var (
+		ret0 = new(common.Address)
+	)
+	out := ret0
+	err := _L2StandardBridge.contract.Call(opts, out, "l1TokenBridge")
+	return *ret0, err
+}
+
+// L1TokenBridge is a free data retrieval call binding the contract method 0x36c717c1.
+//
+// Solidity: function l1TokenBridge() constant returns(address)
+func (_L2StandardBridge *L2StandardBridgeSession) L1TokenBridge() (common.Address, error) {
+	return _L2StandardBridge.Contract.L1TokenBridge(&_L2StandardBridge.CallOpts)
+}
+
+// L1TokenBridge is a free data retrieval call binding the contract method 0x36c717c1.
+//
+// Solidity: function l1TokenBridge() constant returns(address)
+func (_L2StandardBridge *L2StandardBridgeCallerSession) L1TokenBridge() (common.Address, error) {
+	return _L2StandardBridge.Contract.L1TokenBridge(&_L2StandardBridge.CallOpts)
+}
+
+// Messenger is a free data retrieval call binding the contract method 0x3cb747bf.
+//
+// Solidity: function messenger() constant returns(address)
+func (_L2StandardBridge *L2StandardBridgeCaller) Messenger(opts *bind.CallOpts) (common.Address, error) {
+	var (
+		ret0 = new(common.Address)
+	)
+	out := ret0
+	err := _L2StandardBridge.contract.Call(opts, out, "messenger")
+	return *ret0, err
+}
+
+// Messenger is a free data retrieval call binding the contract method 0x3cb747bf.
+//
+// Solidity: function messenger() constant returns(address)
+func (_L2StandardBridge *L2StandardBridgeSession) Messenger() (common.Address, error) {
+	return _L2StandardBridge.Contract.Messenger(&_L2StandardBridge.CallOpts)
+}
+
+// Messenger is a free data retrieval call binding the contract method 0x3cb747bf.
+//
+// Solidity: function messenger() constant returns(address)
+func (_L2StandardBridge *L2StandardBridgeCallerSession) Messenger() (common.Address, error) {
+	return _L2StandardBridge.Contract.Messenger(&_L2StandardBridge.CallOpts)
+}
+
+// FinalizeDeposit is a paid mutator transaction binding the contract method 0x662a633a.
+//
+// Solidity: function finalizeDeposit(address _l1Token, address _l2Token, address _from, address _to, uint256 _amount, bytes _data) returns()
+func (_L2StandardBridge *L2StandardBridgeTransactor) FinalizeDeposit(opts *bind.TransactOpts, _l1Token common.Address, _l2Token common.Address, _from common.Address, _to common.Address, _amount *big.Int, _data []byte) (*types.Transaction, error) {
+	return _L2StandardBridge.contract.Transact(opts, "finalizeDeposit", _l1Token, _l2Token, _from, _to, _amount, _data)
+}
+
+// FinalizeDeposit is a paid mutator transaction binding the contract method 0x662a633a.
+//
+// Solidity: function finalizeDeposit(address _l1Token, address _l2Token, address _from, address _to, uint256 _amount, bytes _data) returns()
+func (_L2StandardBridge *L2StandardBridgeSession) FinalizeDeposit(_l1Token common.Address, _l2Token common.Address, _from common.Address, _to common.Address, _amount *big.Int, _data []byte) (*types.Transaction, error) {
+	return _L2StandardBridge.Contract.FinalizeDeposit(&_L2StandardBridge.TransactOpts, _l1Token, _l2Token, _from, _to, _amount, _data)
+}
+
+// FinalizeDeposit is a paid mutator transaction binding the contract method 0x662a633a.
+//
+// Solidity: function finalizeDeposit(address _l1Token, address _l2Token, address _from, address _to, uint256 _amount, bytes _data) returns()
+func (_L2StandardBridge *L2StandardBridgeTransactorSession) FinalizeDeposit(_l1Token common.Address, _l2Token common.Address, _from common.Address, _to common.Address, _amount *big.Int, _data []byte) (*types.Transaction, error) {
+	return _L2StandardBridge.Contract.FinalizeDeposit(&_L2StandardBridge.TransactOpts, _l1Token, _l2Token, _from, _to, _amount, _data)
+}
+
+// Withdraw is a paid mutator transaction binding the contract method 0x32b7006d.
+//
+// Solidity: function withdraw(address _l2Token, uint256 _amount, uint32 _l1Gas, bytes _data) returns()
+func (_L2StandardBridge *L2StandardBridgeTransactor) Withdraw(opts *bind.TransactOpts, _l2Token common.Address, _amount *big.Int, _l1Gas uint32, _data []byte) (*types.Transaction, error) {
+	return _L2StandardBridge.contract.Transact(opts, "withdraw", _l2Token, _amount, _l1Gas, _data)
+}
+
+// Withdraw is a paid mutator transaction binding the contract method 0x32b7006d.
+//
+// Solidity: function withdraw(address _l2Token, uint256 _amount, uint32 _l1Gas, bytes _data) returns()
+func (_L2StandardBridge *L2StandardBridgeSession) Withdraw(_l2Token common.Address, _amount *big.Int, _l1Gas uint32, _data []byte) (*types.Transaction, error) {
+	return _L2StandardBridge.Contract.Withdraw(&_L2StandardBridge.TransactOpts, _l2Token, _amount, _l1Gas, _data)
+}
+
+// Withdraw is a paid mutator transaction binding the contract method 0x32b7006d.
+//
+// Solidity: function withdraw(address _l2Token, uint256 _amount, uint32 _l1Gas, bytes _data) returns()
+func (_L2StandardBridge *L2StandardBridgeTransactorSession) Withdraw(_l2Token common.Address, _amount *big.Int, _l1Gas uint32, _data []byte) (*types.Transaction, error) {
+	return _L2StandardBridge.Contract.Withdraw(&_L2StandardBridge.TransactOpts, _l2Token, _amount, _l1Gas, _data)
+}
+
+// WithdrawTo is a paid mutator transaction binding the contract method 0xa3a79548.
+//
+// Solidity: function withdrawTo(address _l2Token, address _to, uint256 _amount, uint32 _l1Gas, bytes _data) returns()
+func (_L2StandardBridge *L2StandardBridgeTransactor) WithdrawTo(opts *bind.TransactOpts, _l2Token common.Address, _to common.Address, _amount *big.Int, _l1Gas uint32, _data []byte) (*types.Transaction, error) {
+	return _L2StandardBridge.contract.Transact(opts, "withdrawTo", _l2Token, _to, _amount, _l1Gas, _data)
+}
+
+// WithdrawTo is a paid mutator transaction binding the contract method 0xa3a79548.
+//
+// Solidity: function withdrawTo(address _l2Token, address _to, uint256 _amount, uint32 _l1Gas, bytes _data) returns()
+func (_L2StandardBridge *L2StandardBridgeSession) WithdrawTo(_l2Token common.Address, _to common.Address, _amount *big.Int, _l1Gas uint32, _data []byte) (*types.Transaction, error) {
+	return _L2StandardBridge.Contract.WithdrawTo(&_L2StandardBridge.TransactOpts, _l2Token, _to, _amount, _l1Gas, _data)
+}
+
+// WithdrawTo is a paid mutator transaction binding the contract method 0xa3a79548.
+//
+// Solidity: function withdrawTo(address _l2Token, address _to, uint256 _amount, uint32 _l1Gas, bytes _data) returns()
+func (_L2StandardBridge *L2StandardBridgeTransactorSession) WithdrawTo(_l2Token common.Address, _to common.Address, _amount *big.Int, _l1Gas uint32, _data []byte) (*types.Transaction, error) {
+	return _L2StandardBridge.Contract.WithdrawTo(&_L2StandardBridge.TransactOpts, _l2Token, _to, _amount, _l1Gas, _data)
+}
+
+// L2StandardBridgeDepositFailedIterator is returned from FilterDepositFailed and is used to iterate over the raw logs and unpacked data for DepositFailed events raised by the L2StandardBridge contract.
+type L2StandardBridgeDepositFailedIterator struct {
+	Event *L2StandardBridgeDepositFailed // Event containing the contract specifics and raw log
+
+	contract *bind.BoundContract // Generic contract to use for unpacking event data
+	event    string              // Event name to use for unpacking event data
+
+	logs chan types.Log        // Log channel receiving the found contract events
+	sub  ethereum.Subscription // Subscription for errors, completion and termination
+	done bool                  // Whether the subscription completed delivering logs
+	fail error                 // Occurred error to stop iteration
+}
+
+// Next advances the iterator to the subsequent event, returning whether there
+// are any more events found. In case of a retrieval or parsing error, false is
+// returned and Error() can be queried for the exact failure.
+func (it *L2StandardBridgeDepositFailedIterator) Next() bool {
+	// If the iterator failed, stop iterating
+	if it.fail != nil {
+		return false
+	}
+	// If the iterator completed, deliver directly whatever's available
+	if it.done {
+		select {
+		case log := <-it.logs:
+			it.Event = new(L2StandardBridgeDepositFailed)
+			if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+				it.fail = err
+				return false
+			}
+			it.Event.Raw = log
+			return true
+
+		default:
+			return false
+		}
+	}
+	// Iterator still in progress, wait for either a data or an error event
+	select {
+	case log := <-it.logs:
+		it.Event = new(L2StandardBridgeDepositFailed)
+		if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+			it.fail = err
+			return false
+		}
+		it.Event.Raw = log
+		return true
+
+	case err := <-it.sub.Err():
+		it.done = true
+		it.fail = err
+		return it.Next()
+	}
+}
+
+// Error returns any retrieval or parsing error occurred during filtering.
+func (it *L2StandardBridgeDepositFailedIterator) Error() error {
+	return it.fail
+}
+
+// Close terminates the iteration process, releasing any pending underlying
+// resources.
+func (it *L2StandardBridgeDepositFailedIterator) Close() error {
+	it.sub.Unsubscribe()
+	return nil
+}
+
+// L2StandardBridgeDepositFailed represents a DepositFailed event raised by the L2StandardBridge contract.
+type L2StandardBridgeDepositFailed struct {
+	L1Token common.Address
+	L2Token common.Address
+	From    common.Address
+	To      common.Address
+	Amount  *big.Int
+	Data    []byte
+	Raw     types.Log // Blockchain specific contextual infos
+}
+
+// FilterDepositFailed is a free log retrieval operation binding the contract event 0x7ea89a4591614515571c2b51f5ea06494056f261c10ab1ed8c03c7590d87bce0.
+//
+// Solidity: event DepositFailed(address indexed _l1Token, address indexed _l2Token, address indexed _from, address _to, uint256 _amount, bytes _data)
+func (_L2StandardBridge *L2StandardBridgeFilterer) FilterDepositFailed(opts *bind.FilterOpts, _l1Token []common.Address, _l2Token []common.Address, _from []common.Address) (*L2StandardBridgeDepositFailedIterator, error) {
+
+	var _l1TokenRule []interface{}
+	for _, _l1TokenItem := range _l1Token {
+		_l1TokenRule = append(_l1TokenRule, _l1TokenItem)
+	}
+	var _l2TokenRule []interface{}
+	for _, _l2TokenItem := range _l2Token {
+		_l2TokenRule = append(_l2TokenRule, _l2TokenItem)
+	}
+	var _fromRule []interface{}
+	for _, _fromItem := range _from {
+		_fromRule = append(_fromRule, _fromItem)
+	}
+
+	logs, sub, err := _L2StandardBridge.contract.FilterLogs(opts, "DepositFailed", _l1TokenRule, _l2TokenRule, _fromRule)
+	if err != nil {
+		return nil, err
+	}
+	return &L2StandardBridgeDepositFailedIterator{contract: _L2StandardBridge.contract, event: "DepositFailed", logs: logs, sub: sub}, nil
+}
+
+// WatchDepositFailed is a free log subscription operation binding the contract event 0x7ea89a4591614515571c2b51f5ea06494056f261c10ab1ed8c03c7590d87bce0.
+//
+// Solidity: event DepositFailed(address indexed _l1Token, address indexed _l2Token, address indexed _from, address _to, uint256 _amount, bytes _data)
+func (_L2StandardBridge *L2StandardBridgeFilterer) WatchDepositFailed(opts *bind.WatchOpts, sink chan<- *L2StandardBridgeDepositFailed, _l1Token []common.Address, _l2Token []common.Address, _from []common.Address) (event.Subscription, error) {
+
+	var _l1TokenRule []interface{}
+	for _, _l1TokenItem := range _l1Token {
+		_l1TokenRule = append(_l1TokenRule, _l1TokenItem)
+	}
+	var _l2TokenRule []interface{}
+	for _, _l2TokenItem := range _l2Token {
+		_l2TokenRule = append(_l2TokenRule, _l2TokenItem)
+	}
+	var _fromRule []interface{}
+	for _, _fromItem := range _from {
+		_fromRule = append(_fromRule, _fromItem)
+	}
+
+	logs, sub, err := _L2StandardBridge.contract.WatchLogs(opts, "DepositFailed", _l1TokenRule, _l2TokenRule, _fromRule)
+	if err != nil {
+		return nil, err
+	}
+	return event.NewSubscription(func(quit <-chan struct{}) error {
+		defer sub.Unsubscribe()
+		for {
+			select {
+			case log := <-logs:
+				// New log arrived, parse the event and forward to the user
+				event := new(L2StandardBridgeDepositFailed)
+				if err := _L2StandardBridge.contract.UnpackLog(event, "DepositFailed", log); err != nil {
+					return err
+				}
+				event.Raw = log
+
+				select {
+				case sink <- event:
+				case err := <-sub.Err():
+					return err
+				case <-quit:
+					return nil
+				}
+			case err := <-sub.Err():
+				return err
+			case <-quit:
+				return nil
+			}
+		}
+	}), nil
+}
+
+// ParseDepositFailed is a log parse operation binding the contract event 0x7ea89a4591614515571c2b51f5ea06494056f261c10ab1ed8c03c7590d87bce0.
+//
+// Solidity: event DepositFailed(address indexed _l1Token, address indexed _l2Token, address indexed _from, address _to, uint256 _amount, bytes _data)
+func (_L2StandardBridge *L2StandardBridgeFilterer) ParseDepositFailed(log types.Log) (*L2StandardBridgeDepositFailed, error) {
+	event := new(L2StandardBridgeDepositFailed)
+	if err := _L2StandardBridge.contract.UnpackLog(event, "DepositFailed", log); err != nil {
+		return nil, err
+	}
+	return event, nil
+}
+
+// L2StandardBridgeDepositFinalizedIterator is returned from FilterDepositFinalized and is used to iterate over the raw logs and unpacked data for DepositFinalized events raised by the L2StandardBridge contract.
+type L2StandardBridgeDepositFinalizedIterator struct {
+	Event *L2StandardBridgeDepositFinalized // Event containing the contract specifics and raw log
+
+	contract *bind.BoundContract // Generic contract to use for unpacking event data
+	event    string              // Event name to use for unpacking event data
+
+	logs chan types.Log        // Log channel receiving the found contract events
+	sub  ethereum.Subscription // Subscription for errors, completion and termination
+	done bool                  // Whether the subscription completed delivering logs
+	fail error                 // Occurred error to stop iteration
+}
+
+// Next advances the iterator to the subsequent event, returning whether there
+// are any more events found. In case of a retrieval or parsing error, false is
+// returned and Error() can be queried for the exact failure.
+func (it *L2StandardBridgeDepositFinalizedIterator) Next() bool {
+	// If the iterator failed, stop iterating
+	if it.fail != nil {
+		return false
+	}
+	// If the iterator completed, deliver directly whatever's available
+	if it.done {
+		select {
+		case log := <-it.logs:
+			it.Event = new(L2StandardBridgeDepositFinalized)
+			if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+				it.fail = err
+				return false
+			}
+			it.Event.Raw = log
+			return true
+
+		default:
+			return false
+		}
+	}
+	// Iterator still in progress, wait for either a data or an error event
+	select {
+	case log := <-it.logs:
+		it.Event = new(L2StandardBridgeDepositFinalized)
+		if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+			it.fail = err
+			return false
+		}
+		it.Event.Raw = log
+		return true
+
+	case err := <-it.sub.Err():
+		it.done = true
+		it.fail = err
+		return it.Next()
+	}
+}
+
+// Error returns any retrieval or parsing error occurred during filtering.
+func (it *L2StandardBridgeDepositFinalizedIterator) Error() error {
+	return it.fail
+}
+
+// Close terminates the iteration process, releasing any pending underlying
+// resources.
+func (it *L2StandardBridgeDepositFinalizedIterator) Close() error {
+	it.sub.Unsubscribe()
+	return nil
+}
+
+// L2StandardBridgeDepositFinalized represents a DepositFinalized event raised by the L2StandardBridge contract.
+type L2StandardBridgeDepositFinalized struct {
+	L1Token common.Address
+	L2Token common.Address
+	From    common.Address
+	To      common.Address
+	Amount  *big.Int
+	Data    []byte
+	Raw     types.Log // Blockchain specific contextual infos
+}
+
+// FilterDepositFinalized is a free log retrieval operation binding the contract event 0xb0444523268717a02698be47d0803aa7468c00acbed2f8bd93a0459cde61dd89.
+//
+// Solidity: event DepositFinalized(address indexed _l1Token, address indexed _l2Token, address indexed _from, address _to, uint256 _amount, bytes _data)
+func (_L2StandardBridge *L2StandardBridgeFilterer) FilterDepositFinalized(opts *bind.FilterOpts, _l1Token []common.Address, _l2Token []common.Address, _from []common.Address) (*L2StandardBridgeDepositFinalizedIterator, error) {
+
+	var _l1TokenRule []interface{}
+	for _, _l1TokenItem := range _l1Token {
+		_l1TokenRule = append(_l1TokenRule, _l1TokenItem)
+	}
+	var _l2TokenRule []interface{}
+	for _, _l2TokenItem := range _l2Token {
+		_l2TokenRule = append(_l2TokenRule, _l2TokenItem)
+	}
+	var _fromRule []interface{}
+	for _, _fromItem := range _from {
+		_fromRule = append(_fromRule, _fromItem)
+	}
+
+	logs, sub, err := _L2StandardBridge.contract.FilterLogs(opts, "DepositFinalized", _l1TokenRule, _l2TokenRule, _fromRule)
+	if err != nil {
+		return nil, err
+	}
+	return &L2StandardBridgeDepositFinalizedIterator{contract: _L2StandardBridge.contract, event: "DepositFinalized", logs: logs, sub: sub}, nil
+}
+
+// WatchDepositFinalized is a free log subscription operation binding the contract event 0xb0444523268717a02698be47d0803aa7468c00acbed2f8bd93a0459cde61dd89.
+//
+// Solidity: event DepositFinalized(address indexed _l1Token, address indexed _l2Token, address indexed _from, address _to, uint256 _amount, bytes _data)
+func (_L2StandardBridge *L2StandardBridgeFilterer) WatchDepositFinalized(opts *bind.WatchOpts, sink chan<- *L2StandardBridgeDepositFinalized, _l1Token []common.Address, _l2Token []common.Address, _from []common.Address) (event.Subscription, error) {
+
+	var _l1TokenRule []interface{}
+	for _, _l1TokenItem := range _l1Token {
+		_l1TokenRule = append(_l1TokenRule, _l1TokenItem)
+	}
+	var _l2TokenRule []interface{}
+	for _, _l2TokenItem := range _l2Token {
+		_l2TokenRule = append(_l2TokenRule, _l2TokenItem)
+	}
+	var _fromRule []interface{}
+	for _, _fromItem := range _from {
+		_fromRule = append(_fromRule, _fromItem)
+	}
+
+	logs, sub, err := _L2StandardBridge.contract.WatchLogs(opts, "DepositFinalized", _l1TokenRule, _l2TokenRule, _fromRule)
+	if err != nil {
+		return nil, err
+	}
+	return event.NewSubscription(func(quit <-chan struct{}) error {
+		defer sub.Unsubscribe()
+		for {
+			select {
+			case log := <-logs:
+				// New log arrived, parse the event and forward to the user
+				event := new(L2StandardBridgeDepositFinalized)
+				if err := _L2StandardBridge.contract.UnpackLog(event, "DepositFinalized", log); err != nil {
+					return err
+				}
+				event.Raw = log
+
+				select {
+				case sink <- event:
+				case err := <-sub.Err():
+					return err
+				case <-quit:
+					return nil
+				}
+			case err := <-sub.Err():
+				return err
+			case <-quit:
+				return nil
+			}
+		}
+	}), nil
+}
+
+// ParseDepositFinalized is a log parse operation binding the contract event 0xb0444523268717a02698be47d0803aa7468c00acbed2f8bd93a0459cde61dd89.
+//
+// Solidity: event DepositFinalized(address indexed _l1Token, address indexed _l2Token, address indexed _from, address _to, uint256 _amount, bytes _data)
+func (_L2StandardBridge *L2StandardBridgeFilterer) ParseDepositFinalized(log types.Log) (*L2StandardBridgeDepositFinalized, error) {
+	event := new(L2StandardBridgeDepositFinalized)
+	if err := _L2StandardBridge.contract.UnpackLog(event, "DepositFinalized", log); err != nil {
+		return nil, err
+	}
+	return event, nil
+}
+
+// L2StandardBridgeWithdrawalInitiatedIterator is returned from FilterWithdrawalInitiated and is used to iterate over the raw logs and unpacked data for WithdrawalInitiated events raised by the L2StandardBridge contract.
+type L2StandardBridgeWithdrawalInitiatedIterator struct {
+	Event *L2StandardBridgeWithdrawalInitiated // Event containing the contract specifics and raw log
+
+	contract *bind.BoundContract // Generic contract to use for unpacking event data
+	event    string              // Event name to use for unpacking event data
+
+	logs chan types.Log        // Log channel receiving the found contract events
+	sub  ethereum.Subscription // Subscription for errors, completion and termination
+	done bool                  // Whether the subscription completed delivering logs
+	fail error                 // Occurred error to stop iteration
+}
+
+// Next advances the iterator to the subsequent event, returning whether there
+// are any more events found. In case of a retrieval or parsing error, false is
+// returned and Error() can be queried for the exact failure.
+func (it *L2StandardBridgeWithdrawalInitiatedIterator) Next() bool {
+	// If the iterator failed, stop iterating
+	if it.fail != nil {
+		return false
+	}
+	// If the iterator completed, deliver directly whatever's available
+	if it.done {
+		select {
+		case log := <-it.logs:
+			it.Event = new(L2StandardBridgeWithdrawalInitiated)
+			if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+				it.fail = err
+				return false
+			}
+			it.Event.Raw = log
+			return true
+
+		default:
+			return false
+		}
+	}
+	// Iterator still in progress, wait for either a data or an error event
+	select {
+	case log := <-it.logs:
+		it.Event = new(L2StandardBridgeWithdrawalInitiated)
+		if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+			it.fail = err
+			return false
+		}
+		it.Event.Raw = log
+		return true
+
+	case err := <-it.sub.Err():
+		it.done = true
+		it.fail = err
+		return it.Next()
+	}
+}
+
+// Error returns any retrieval or parsing error occurred during filtering.
+func (it *L2StandardBridgeWithdrawalInitiatedIterator) Error() error {
+	return it.fail
+}
+
+// Close terminates the iteration process, releasing any pending underlying
+// resources.
+func (it *L2StandardBridgeWithdrawalInitiatedIterator) Close() error {
+	it.sub.Unsubscribe()
+	return nil
+}
+
+// L2StandardBridgeWithdrawalInitiated represents a WithdrawalInitiated event raised by the L2StandardBridge contract.
+type L2StandardBridgeWithdrawalInitiated struct {
+	L1Token common.Address
+	L2Token common.Address
+	From    common.Address
+	To      common.Address
+	Amount  *big.Int
+	Data    []byte
+	Raw     types.Log // Blockchain specific contextual infos
+}
+
+// FilterWithdrawalInitiated is a free log retrieval operation binding the contract event 0x73d170910aba9e6d50b102db522b1dbcd796216f5128b445aa2135272886497e.
+//
+// Solidity: event WithdrawalInitiated(address indexed _l1Token, address indexed _l2Token, address indexed _from, address _to, uint256 _amount, bytes _data)
+func (_L2StandardBridge *L2StandardBridgeFilterer) FilterWithdrawalInitiated(opts *bind.FilterOpts, _l1Token []common.Address, _l2Token []common.Address, _from []common.Address) (*L2StandardBridgeWithdrawalInitiatedIterator, error) {
+
+	var _l1TokenRule []interface{}
+	for _, _l1TokenItem := range _l1Token {
+		_l1TokenRule = append(_l1TokenRule, _l1TokenItem)
+	}
+	var _l2TokenRule []interface{}
+	for _, _l2TokenItem := range _l2Token {
+		_l2TokenRule = append(_l2TokenRule, _l2TokenItem)
+	}
+	var _fromRule []interface{}
+	for _, _fromItem := range _from {
+		_fromRule = append(_fromRule, _fromItem)
+	}
+
+	logs, sub, err := _L2StandardBridge.contract.FilterLogs(opts, "WithdrawalInitiated", _l1TokenRule, _l2TokenRule, _fromRule)
+	if err != nil {
+		return nil, err
+	}
+	return &L2StandardBridgeWithdrawalInitiatedIterator{contract: _L2StandardBridge.contract, event: "WithdrawalInitiated", logs: logs, sub: sub}, nil
+}
+
+// WatchWithdrawalInitiated is a free log subscription operation binding the contract event 0x73d170910aba9e6d50b102db522b1dbcd796216f5128b445aa2135272886497e.
+//
+// Solidity: event WithdrawalInitiated(address indexed _l1Token, address indexed _l2Token, address indexed _from, address _to, uint256 _amount, bytes _data)
+func (_L2StandardBridge *L2StandardBridgeFilterer) WatchWithdrawalInitiated(opts *bind.WatchOpts, sink chan<- *L2StandardBridgeWithdrawalInitiated, _l1Token []common.Address, _l2Token []common.Address, _from []common.Address) (event.Subscription, error) {
+
+	var _l1TokenRule []interface{}
+	for _, _l1TokenItem := range _l1Token {
+		_l1TokenRule = append(_l1TokenRule, _l1TokenItem)
+	}
+	var _l2TokenRule []interface{}
+	for _, _l2TokenItem := range _l2Token {
+		_l2TokenRule = append(_l2TokenRule, _l2TokenItem)
+	}
+	var _fromRule []interface{}
+	for _, _fromItem := range _from {
+		_fromRule = append(_fromRule, _fromItem)
+	}
+
+	logs, sub, err := _L2StandardBridge.contract.WatchLogs(opts, "WithdrawalInitiated", _l1TokenRule, _l2TokenRule, _fromRule)
+	if err != nil {
+		return nil, err
+	}
+	return event.NewSubscription(func(quit <-chan struct{}) error {
+		defer sub.Unsubscribe()
+		for {
+			select {
+			case log := <-logs:
+				// New log arrived, parse the event and forward to the user
+				event := new(L2StandardBridgeWithdrawalInitiated)
+				if err := _L2StandardBridge.contract.UnpackLog(event, "WithdrawalInitiated", log); err != nil {
+					return err
+				}
+				event.Raw = log
+
+				select {
+				case sink <- event:
+				case err := <-sub.Err():
+					return err
+				case <-quit:
+					return nil
+				}
+			case err := <-sub.Err():
+				return err
+			case <-quit:
+				return nil
+			}
+		}
+	}), nil
+}
+
+// ParseWithdrawalInitiated is a log parse operation binding the contract event 0x73d170910aba9e6d50b102db522b1dbcd796216f5128b445aa2135272886497e.
+//
+// Solidity: event WithdrawalInitiated(address indexed _l1Token, address indexed _l2Token, address indexed _from, address _to, uint256 _amount, bytes _data)
+func (_L2StandardBridge *L2StandardBridgeFilterer) ParseWithdrawalInitiated(log types.Log) (*L2StandardBridgeWithdrawalInitiated, error) {
+	event := new(L2StandardBridgeWithdrawalInitiated)
+	if err := _L2StandardBridge.contract.UnpackLog(event, "WithdrawalInitiated", log); err != nil {
+		return nil, err
+	}
+	return event, nil
+}

go/indexer/bindings/l2erc20/l2erc20.go

+// Code generated - DO NOT EDIT.
+// This file is a generated binding and any manual changes will be lost.
+
+package l2erc20
+
+import (
+	"math/big"
+	"strings"
+
+	ethereum "github.com/ethereum-optimism/optimism/l2geth"
+	"github.com/ethereum-optimism/optimism/l2geth/accounts/abi"
+	"github.com/ethereum-optimism/optimism/l2geth/accounts/abi/bind"
+	"github.com/ethereum-optimism/optimism/l2geth/common"
+	"github.com/ethereum-optimism/optimism/l2geth/core/types"
+	"github.com/ethereum-optimism/optimism/l2geth/event"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var (
+	_ = big.NewInt
+	_ = strings.NewReader
+	_ = ethereum.NotFound
+	_ = abi.U256
+	_ = bind.Bind
+	_ = common.Big1
+	_ = types.BloomLookup
+	_ = event.NewSubscription
+)
+
+// L2ERC20ABI is the input ABI used to generate the binding from.
+const L2ERC20ABI = "[{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"_initialAmount\",\"type\":\"uint256\"},{\"internalType\":\"string\",\"name\":\"_tokenName\",\"type\":\"string\"},{\"internalType\":\"uint8\",\"name\":\"_decimalUnits\",\"type\":\"uint8\"},{\"internalType\":\"string\",\"name\":\"_tokenSymbol\",\"type\":\"string\"}],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_owner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_spender\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"_value\",\"type\":\"uint256\"}],\"name\":\"Approval\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_from\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_to\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"_value\",\"type\":\"uint256\"}],\"name\":\"Transfer\",\"type\":\"event\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_owner\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"_spender\",\"type\":\"address\"}],\"name\":\"allowance\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"remaining\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"name\":\"allowed\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_spender\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"_value\",\"type\":\"uint256\"}],\"name\":\"approve\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"success\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_owner\",\"type\":\"address\"}],\"name\":\"balanceOf\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"balance\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"name\":\"balances\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"decimals\",\"outputs\":[{\"internalType\":\"uint8\",\"name\":\"\",\"type\":\"uint8\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"destroy\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"name\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"symbol\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"totalSupply\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"_value\",\"type\":\"uint256\"}],\"name\":\"transfer\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"success\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"_to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"_value\",\"type\":\"uint256\"}],\"name\":\"transferFrom\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"success\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}]"
+
+// L2ERC20Bin is the compiled bytecode used for deploying new contracts.
+var L2ERC20Bin = "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"
+
+// DeployL2ERC20 deploys a new Ethereum contract, binding an instance of L2ERC20 to it.
+func DeployL2ERC20(auth *bind.TransactOpts, backend bind.ContractBackend, _initialAmount *big.Int, _tokenName string, _decimalUnits uint8, _tokenSymbol string) (common.Address, *types.Transaction, *L2ERC20, error) {
+	parsed, err := abi.JSON(strings.NewReader(L2ERC20ABI))
+	if err != nil {
+		return common.Address{}, nil, nil, err
+	}
+
+	address, tx, contract, err := bind.DeployContract(auth, parsed, common.FromHex(L2ERC20Bin), backend, _initialAmount, _tokenName, _decimalUnits, _tokenSymbol)
+	if err != nil {
+		return common.Address{}, nil, nil, err
+	}
+	return address, tx, &L2ERC20{L2ERC20Caller: L2ERC20Caller{contract: contract}, L2ERC20Transactor: L2ERC20Transactor{contract: contract}, L2ERC20Filterer: L2ERC20Filterer{contract: contract}}, nil
+}
+
+// L2ERC20 is an auto generated Go binding around an Ethereum contract.
+type L2ERC20 struct {
+	L2ERC20Caller     // Read-only binding to the contract
+	L2ERC20Transactor // Write-only binding to the contract
+	L2ERC20Filterer   // Log filterer for contract events
+}
+
+// L2ERC20Caller is an auto generated read-only Go binding around an Ethereum contract.
+type L2ERC20Caller struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// L2ERC20Transactor is an auto generated write-only Go binding around an Ethereum contract.
+type L2ERC20Transactor struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// L2ERC20Filterer is an auto generated log filtering Go binding around an Ethereum contract events.
+type L2ERC20Filterer struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// L2ERC20Session is an auto generated Go binding around an Ethereum contract,
+// with pre-set call and transact options.
+type L2ERC20Session struct {
+	Contract     *L2ERC20          // Generic contract binding to set the session for
+	CallOpts     bind.CallOpts     // Call options to use throughout this session
+	TransactOpts bind.TransactOpts // Transaction auth options to use throughout this session
+}
+
+// L2ERC20CallerSession is an auto generated read-only Go binding around an Ethereum contract,
+// with pre-set call options.
+type L2ERC20CallerSession struct {
+	Contract *L2ERC20Caller // Generic contract caller binding to set the session for
+	CallOpts bind.CallOpts  // Call options to use throughout this session
+}
+
+// L2ERC20TransactorSession is an auto generated write-only Go binding around an Ethereum contract,
+// with pre-set transact options.
+type L2ERC20TransactorSession struct {
+	Contract     *L2ERC20Transactor // Generic contract transactor binding to set the session for
+	TransactOpts bind.TransactOpts  // Transaction auth options to use throughout this session
+}
+
+// L2ERC20Raw is an auto generated low-level Go binding around an Ethereum contract.
+type L2ERC20Raw struct {
+	Contract *L2ERC20 // Generic contract binding to access the raw methods on
+}
+
+// L2ERC20CallerRaw is an auto generated low-level read-only Go binding around an Ethereum contract.
+type L2ERC20CallerRaw struct {
+	Contract *L2ERC20Caller // Generic read-only contract binding to access the raw methods on
+}
+
+// L2ERC20TransactorRaw is an auto generated low-level write-only Go binding around an Ethereum contract.
+type L2ERC20TransactorRaw struct {
+	Contract *L2ERC20Transactor // Generic write-only contract binding to access the raw methods on
+}
+
+// NewL2ERC20 creates a new instance of L2ERC20, bound to a specific deployed contract.
+func NewL2ERC20(address common.Address, backend bind.ContractBackend) (*L2ERC20, error) {
+	contract, err := bindL2ERC20(address, backend, backend, backend)
+	if err != nil {
+		return nil, err
+	}
+	return &L2ERC20{L2ERC20Caller: L2ERC20Caller{contract: contract}, L2ERC20Transactor: L2ERC20Transactor{contract: contract}, L2ERC20Filterer: L2ERC20Filterer{contract: contract}}, nil
+}
+
+// NewL2ERC20Caller creates a new read-only instance of L2ERC20, bound to a specific deployed contract.
+func NewL2ERC20Caller(address common.Address, caller bind.ContractCaller) (*L2ERC20Caller, error) {
+	contract, err := bindL2ERC20(address, caller, nil, nil)
+	if err != nil {
+		return nil, err
+	}
+	return &L2ERC20Caller{contract: contract}, nil
+}
+
+// NewL2ERC20Transactor creates a new write-only instance of L2ERC20, bound to a specific deployed contract.
+func NewL2ERC20Transactor(address common.Address, transactor bind.ContractTransactor) (*L2ERC20Transactor, error) {
+	contract, err := bindL2ERC20(address, nil, transactor, nil)
+	if err != nil {
+		return nil, err
+	}
+	return &L2ERC20Transactor{contract: contract}, nil
+}
+
+// NewL2ERC20Filterer creates a new log filterer instance of L2ERC20, bound to a specific deployed contract.
+func NewL2ERC20Filterer(address common.Address, filterer bind.ContractFilterer) (*L2ERC20Filterer, error) {
+	contract, err := bindL2ERC20(address, nil, nil, filterer)
+	if err != nil {
+		return nil, err
+	}
+	return &L2ERC20Filterer{contract: contract}, nil
+}
+
+// bindL2ERC20 binds a generic wrapper to an already deployed contract.
+func bindL2ERC20(address common.Address, caller bind.ContractCaller, transactor bind.ContractTransactor, filterer bind.ContractFilterer) (*bind.BoundContract, error) {
+	parsed, err := abi.JSON(strings.NewReader(L2ERC20ABI))
+	if err != nil {
+		return nil, err
+	}
+	return bind.NewBoundContract(address, parsed, caller, transactor, filterer), nil
+}
+
+// Call invokes the (constant) contract method with params as input values and
+// sets the output to result. The result type might be a single field for simple
+// returns, a slice of interfaces for anonymous returns and a struct for named
+// returns.
+func (_L2ERC20 *L2ERC20Raw) Call(opts *bind.CallOpts, result interface{}, method string, params ...interface{}) error {
+	return _L2ERC20.Contract.L2ERC20Caller.contract.Call(opts, result, method, params...)
+}
+
+// Transfer initiates a plain transaction to move funds to the contract, calling
+// its default method if one is available.
+func (_L2ERC20 *L2ERC20Raw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _L2ERC20.Contract.L2ERC20Transactor.contract.Transfer(opts)
+}
+
+// Transact invokes the (paid) contract method with params as input values.
+func (_L2ERC20 *L2ERC20Raw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
+	return _L2ERC20.Contract.L2ERC20Transactor.contract.Transact(opts, method, params...)
+}
+
+// Call invokes the (constant) contract method with params as input values and
+// sets the output to result. The result type might be a single field for simple
+// returns, a slice of interfaces for anonymous returns and a struct for named
+// returns.
+func (_L2ERC20 *L2ERC20CallerRaw) Call(opts *bind.CallOpts, result interface{}, method string, params ...interface{}) error {
+	return _L2ERC20.Contract.contract.Call(opts, result, method, params...)
+}
+
+// Transfer initiates a plain transaction to move funds to the contract, calling
+// its default method if one is available.
+func (_L2ERC20 *L2ERC20TransactorRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _L2ERC20.Contract.contract.Transfer(opts)
+}
+
+// Transact invokes the (paid) contract method with params as input values.
+func (_L2ERC20 *L2ERC20TransactorRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
+	return _L2ERC20.Contract.contract.Transact(opts, method, params...)
+}
+
+// Allowance is a free data retrieval call binding the contract method 0xdd62ed3e.
+//
+// Solidity: function allowance(address _owner, address _spender) constant returns(uint256 remaining)
+func (_L2ERC20 *L2ERC20Caller) Allowance(opts *bind.CallOpts, _owner common.Address, _spender common.Address) (*big.Int, error) {
+	var (
+		ret0 = new(*big.Int)
+	)
+	out := ret0
+	err := _L2ERC20.contract.Call(opts, out, "allowance", _owner, _spender)
+	return *ret0, err
+}
+
+// Allowance is a free data retrieval call binding the contract method 0xdd62ed3e.
+//
+// Solidity: function allowance(address _owner, address _spender) constant returns(uint256 remaining)
+func (_L2ERC20 *L2ERC20Session) Allowance(_owner common.Address, _spender common.Address) (*big.Int, error) {
+	return _L2ERC20.Contract.Allowance(&_L2ERC20.CallOpts, _owner, _spender)
+}
+
+// Allowance is a free data retrieval call binding the contract method 0xdd62ed3e.
+//
+// Solidity: function allowance(address _owner, address _spender) constant returns(uint256 remaining)
+func (_L2ERC20 *L2ERC20CallerSession) Allowance(_owner common.Address, _spender common.Address) (*big.Int, error) {
+	return _L2ERC20.Contract.Allowance(&_L2ERC20.CallOpts, _owner, _spender)
+}
+
+// Allowed is a free data retrieval call binding the contract method 0x5c658165.
+//
+// Solidity: function allowed(address , address ) constant returns(uint256)
+func (_L2ERC20 *L2ERC20Caller) Allowed(opts *bind.CallOpts, arg0 common.Address, arg1 common.Address) (*big.Int, error) {
+	var (
+		ret0 = new(*big.Int)
+	)
+	out := ret0
+	err := _L2ERC20.contract.Call(opts, out, "allowed", arg0, arg1)
+	return *ret0, err
+}
+
+// Allowed is a free data retrieval call binding the contract method 0x5c658165.
+//
+// Solidity: function allowed(address , address ) constant returns(uint256)
+func (_L2ERC20 *L2ERC20Session) Allowed(arg0 common.Address, arg1 common.Address) (*big.Int, error) {
+	return _L2ERC20.Contract.Allowed(&_L2ERC20.CallOpts, arg0, arg1)
+}
+
+// Allowed is a free data retrieval call binding the contract method 0x5c658165.
+//
+// Solidity: function allowed(address , address ) constant returns(uint256)
+func (_L2ERC20 *L2ERC20CallerSession) Allowed(arg0 common.Address, arg1 common.Address) (*big.Int, error) {
+	return _L2ERC20.Contract.Allowed(&_L2ERC20.CallOpts, arg0, arg1)
+}
+
+// BalanceOf is a free data retrieval call binding the contract method 0x70a08231.
+//
+// Solidity: function balanceOf(address _owner) constant returns(uint256 balance)
+func (_L2ERC20 *L2ERC20Caller) BalanceOf(opts *bind.CallOpts, _owner common.Address) (*big.Int, error) {
+	var (
+		ret0 = new(*big.Int)
+	)
+	out := ret0
+	err := _L2ERC20.contract.Call(opts, out, "balanceOf", _owner)
+	return *ret0, err
+}
+
+// BalanceOf is a free data retrieval call binding the contract method 0x70a08231.
+//
+// Solidity: function balanceOf(address _owner) constant returns(uint256 balance)
+func (_L2ERC20 *L2ERC20Session) BalanceOf(_owner common.Address) (*big.Int, error) {
+	return _L2ERC20.Contract.BalanceOf(&_L2ERC20.CallOpts, _owner)
+}
+
+// BalanceOf is a free data retrieval call binding the contract method 0x70a08231.
+//
+// Solidity: function balanceOf(address _owner) constant returns(uint256 balance)
+func (_L2ERC20 *L2ERC20CallerSession) BalanceOf(_owner common.Address) (*big.Int, error) {
+	return _L2ERC20.Contract.BalanceOf(&_L2ERC20.CallOpts, _owner)
+}
+
+// Balances is a free data retrieval call binding the contract method 0x27e235e3.
+//
+// Solidity: function balances(address ) constant returns(uint256)
+func (_L2ERC20 *L2ERC20Caller) Balances(opts *bind.CallOpts, arg0 common.Address) (*big.Int, error) {
+	var (
+		ret0 = new(*big.Int)
+	)
+	out := ret0
+	err := _L2ERC20.contract.Call(opts, out, "balances", arg0)
+	return *ret0, err
+}
+
+// Balances is a free data retrieval call binding the contract method 0x27e235e3.
+//
+// Solidity: function balances(address ) constant returns(uint256)
+func (_L2ERC20 *L2ERC20Session) Balances(arg0 common.Address) (*big.Int, error) {
+	return _L2ERC20.Contract.Balances(&_L2ERC20.CallOpts, arg0)
+}
+
+// Balances is a free data retrieval call binding the contract method 0x27e235e3.
+//
+// Solidity: function balances(address ) constant returns(uint256)
+func (_L2ERC20 *L2ERC20CallerSession) Balances(arg0 common.Address) (*big.Int, error) {
+	return _L2ERC20.Contract.Balances(&_L2ERC20.CallOpts, arg0)
+}
+
+// Decimals is a free data retrieval call binding the contract method 0x313ce567.
+//
+// Solidity: function decimals() constant returns(uint8)
+func (_L2ERC20 *L2ERC20Caller) Decimals(opts *bind.CallOpts) (uint8, error) {
+	var (
+		ret0 = new(uint8)
+	)
+	out := ret0
+	err := _L2ERC20.contract.Call(opts, out, "decimals")
+	return *ret0, err
+}
+
+// Decimals is a free data retrieval call binding the contract method 0x313ce567.
+//
+// Solidity: function decimals() constant returns(uint8)
+func (_L2ERC20 *L2ERC20Session) Decimals() (uint8, error) {
+	return _L2ERC20.Contract.Decimals(&_L2ERC20.CallOpts)
+}
+
+// Decimals is a free data retrieval call binding the contract method 0x313ce567.
+//
+// Solidity: function decimals() constant returns(uint8)
+func (_L2ERC20 *L2ERC20CallerSession) Decimals() (uint8, error) {
+	return _L2ERC20.Contract.Decimals(&_L2ERC20.CallOpts)
+}
+
+// Name is a free data retrieval call binding the contract method 0x06fdde03.
+//
+// Solidity: function name() constant returns(string)
+func (_L2ERC20 *L2ERC20Caller) Name(opts *bind.CallOpts) (string, error) {
+	var (
+		ret0 = new(string)
+	)
+	out := ret0
+	err := _L2ERC20.contract.Call(opts, out, "name")
+	return *ret0, err
+}
+
+// Name is a free data retrieval call binding the contract method 0x06fdde03.
+//
+// Solidity: function name() constant returns(string)
+func (_L2ERC20 *L2ERC20Session) Name() (string, error) {
+	return _L2ERC20.Contract.Name(&_L2ERC20.CallOpts)
+}
+
+// Name is a free data retrieval call binding the contract method 0x06fdde03.
+//
+// Solidity: function name() constant returns(string)
+func (_L2ERC20 *L2ERC20CallerSession) Name() (string, error) {
+	return _L2ERC20.Contract.Name(&_L2ERC20.CallOpts)
+}
+
+// Symbol is a free data retrieval call binding the contract method 0x95d89b41.
+//
+// Solidity: function symbol() constant returns(string)
+func (_L2ERC20 *L2ERC20Caller) Symbol(opts *bind.CallOpts) (string, error) {
+	var (
+		ret0 = new(string)
+	)
+	out := ret0
+	err := _L2ERC20.contract.Call(opts, out, "symbol")
+	return *ret0, err
+}
+
+// Symbol is a free data retrieval call binding the contract method 0x95d89b41.
+//
+// Solidity: function symbol() constant returns(string)
+func (_L2ERC20 *L2ERC20Session) Symbol() (string, error) {
+	return _L2ERC20.Contract.Symbol(&_L2ERC20.CallOpts)
+}
+
+// Symbol is a free data retrieval call binding the contract method 0x95d89b41.
+//
+// Solidity: function symbol() constant returns(string)
+func (_L2ERC20 *L2ERC20CallerSession) Symbol() (string, error) {
+	return _L2ERC20.Contract.Symbol(&_L2ERC20.CallOpts)
+}
+
+// TotalSupply is a free data retrieval call binding the contract method 0x18160ddd.
+//
+// Solidity: function totalSupply() constant returns(uint256)
+func (_L2ERC20 *L2ERC20Caller) TotalSupply(opts *bind.CallOpts) (*big.Int, error) {
+	var (
+		ret0 = new(*big.Int)
+	)
+	out := ret0
+	err := _L2ERC20.contract.Call(opts, out, "totalSupply")
+	return *ret0, err
+}
+
+// TotalSupply is a free data retrieval call binding the contract method 0x18160ddd.
+//
+// Solidity: function totalSupply() constant returns(uint256)
+func (_L2ERC20 *L2ERC20Session) TotalSupply() (*big.Int, error) {
+	return _L2ERC20.Contract.TotalSupply(&_L2ERC20.CallOpts)
+}
+
+// TotalSupply is a free data retrieval call binding the contract method 0x18160ddd.
+//
+// Solidity: function totalSupply() constant returns(uint256)
+func (_L2ERC20 *L2ERC20CallerSession) TotalSupply() (*big.Int, error) {
+	return _L2ERC20.Contract.TotalSupply(&_L2ERC20.CallOpts)
+}
+
+// Approve is a paid mutator transaction binding the contract method 0x095ea7b3.
+//
+// Solidity: function approve(address _spender, uint256 _value) returns(bool success)
+func (_L2ERC20 *L2ERC20Transactor) Approve(opts *bind.TransactOpts, _spender common.Address, _value *big.Int) (*types.Transaction, error) {
+	return _L2ERC20.contract.Transact(opts, "approve", _spender, _value)
+}
+
+// Approve is a paid mutator transaction binding the contract method 0x095ea7b3.
+//
+// Solidity: function approve(address _spender, uint256 _value) returns(bool success)
+func (_L2ERC20 *L2ERC20Session) Approve(_spender common.Address, _value *big.Int) (*types.Transaction, error) {
+	return _L2ERC20.Contract.Approve(&_L2ERC20.TransactOpts, _spender, _value)
+}
+
+// Approve is a paid mutator transaction binding the contract method 0x095ea7b3.
+//
+// Solidity: function approve(address _spender, uint256 _value) returns(bool success)
+func (_L2ERC20 *L2ERC20TransactorSession) Approve(_spender common.Address, _value *big.Int) (*types.Transaction, error) {
+	return _L2ERC20.Contract.Approve(&_L2ERC20.TransactOpts, _spender, _value)
+}
+
+// Destroy is a paid mutator transaction binding the contract method 0x83197ef0.
+//
+// Solidity: function destroy() returns()
+func (_L2ERC20 *L2ERC20Transactor) Destroy(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _L2ERC20.contract.Transact(opts, "destroy")
+}
+
+// Destroy is a paid mutator transaction binding the contract method 0x83197ef0.
+//
+// Solidity: function destroy() returns()
+func (_L2ERC20 *L2ERC20Session) Destroy() (*types.Transaction, error) {
+	return _L2ERC20.Contract.Destroy(&_L2ERC20.TransactOpts)
+}
+
+// Destroy is a paid mutator transaction binding the contract method 0x83197ef0.
+//
+// Solidity: function destroy() returns()
+func (_L2ERC20 *L2ERC20TransactorSession) Destroy() (*types.Transaction, error) {
+	return _L2ERC20.Contract.Destroy(&_L2ERC20.TransactOpts)
+}
+
+// Transfer is a paid mutator transaction binding the contract method 0xa9059cbb.
+//
+// Solidity: function transfer(address _to, uint256 _value) returns(bool success)
+func (_L2ERC20 *L2ERC20Transactor) Transfer(opts *bind.TransactOpts, _to common.Address, _value *big.Int) (*types.Transaction, error) {
+	return _L2ERC20.contract.Transact(opts, "transfer", _to, _value)
+}
+
+// Transfer is a paid mutator transaction binding the contract method 0xa9059cbb.
+//
+// Solidity: function transfer(address _to, uint256 _value) returns(bool success)
+func (_L2ERC20 *L2ERC20Session) Transfer(_to common.Address, _value *big.Int) (*types.Transaction, error) {
+	return _L2ERC20.Contract.Transfer(&_L2ERC20.TransactOpts, _to, _value)
+}
+
+// Transfer is a paid mutator transaction binding the contract method 0xa9059cbb.
+//
+// Solidity: function transfer(address _to, uint256 _value) returns(bool success)
+func (_L2ERC20 *L2ERC20TransactorSession) Transfer(_to common.Address, _value *big.Int) (*types.Transaction, error) {
+	return _L2ERC20.Contract.Transfer(&_L2ERC20.TransactOpts, _to, _value)
+}
+
+// TransferFrom is a paid mutator transaction binding the contract method 0x23b872dd.
+//
+// Solidity: function transferFrom(address _from, address _to, uint256 _value) returns(bool success)
+func (_L2ERC20 *L2ERC20Transactor) TransferFrom(opts *bind.TransactOpts, _from common.Address, _to common.Address, _value *big.Int) (*types.Transaction, error) {
+	return _L2ERC20.contract.Transact(opts, "transferFrom", _from, _to, _value)
+}
+
+// TransferFrom is a paid mutator transaction binding the contract method 0x23b872dd.
+//
+// Solidity: function transferFrom(address _from, address _to, uint256 _value) returns(bool success)
+func (_L2ERC20 *L2ERC20Session) TransferFrom(_from common.Address, _to common.Address, _value *big.Int) (*types.Transaction, error) {
+	return _L2ERC20.Contract.TransferFrom(&_L2ERC20.TransactOpts, _from, _to, _value)
+}
+
+// TransferFrom is a paid mutator transaction binding the contract method 0x23b872dd.
+//
+// Solidity: function transferFrom(address _from, address _to, uint256 _value) returns(bool success)
+func (_L2ERC20 *L2ERC20TransactorSession) TransferFrom(_from common.Address, _to common.Address, _value *big.Int) (*types.Transaction, error) {
+	return _L2ERC20.Contract.TransferFrom(&_L2ERC20.TransactOpts, _from, _to, _value)
+}
+
+// L2ERC20ApprovalIterator is returned from FilterApproval and is used to iterate over the raw logs and unpacked data for Approval events raised by the L2ERC20 contract.
+type L2ERC20ApprovalIterator struct {
+	Event *L2ERC20Approval // Event containing the contract specifics and raw log
+
+	contract *bind.BoundContract // Generic contract to use for unpacking event data
+	event    string              // Event name to use for unpacking event data
+
+	logs chan types.Log        // Log channel receiving the found contract events
+	sub  ethereum.Subscription // Subscription for errors, completion and termination
+	done bool                  // Whether the subscription completed delivering logs
+	fail error                 // Occurred error to stop iteration
+}
+
+// Next advances the iterator to the subsequent event, returning whether there
+// are any more events found. In case of a retrieval or parsing error, false is
+// returned and Error() can be queried for the exact failure.
+func (it *L2ERC20ApprovalIterator) Next() bool {
+	// If the iterator failed, stop iterating
+	if it.fail != nil {
+		return false
+	}
+	// If the iterator completed, deliver directly whatever's available
+	if it.done {
+		select {
+		case log := <-it.logs:
+			it.Event = new(L2ERC20Approval)
+			if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+				it.fail = err
+				return false
+			}
+			it.Event.Raw = log
+			return true
+
+		default:
+			return false
+		}
+	}
+	// Iterator still in progress, wait for either a data or an error event
+	select {
+	case log := <-it.logs:
+		it.Event = new(L2ERC20Approval)
+		if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+			it.fail = err
+			return false
+		}
+		it.Event.Raw = log
+		return true
+
+	case err := <-it.sub.Err():
+		it.done = true
+		it.fail = err
+		return it.Next()
+	}
+}
+
+// Error returns any retrieval or parsing error occurred during filtering.
+func (it *L2ERC20ApprovalIterator) Error() error {
+	return it.fail
+}
+
+// Close terminates the iteration process, releasing any pending underlying
+// resources.
+func (it *L2ERC20ApprovalIterator) Close() error {
+	it.sub.Unsubscribe()
+	return nil
+}
+
+// L2ERC20Approval represents a Approval event raised by the L2ERC20 contract.
+type L2ERC20Approval struct {
+	Owner   common.Address
+	Spender common.Address
+	Value   *big.Int
+	Raw     types.Log // Blockchain specific contextual infos
+}
+
+// FilterApproval is a free log retrieval operation binding the contract event 0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925.
+//
+// Solidity: event Approval(address indexed _owner, address indexed _spender, uint256 _value)
+func (_L2ERC20 *L2ERC20Filterer) FilterApproval(opts *bind.FilterOpts, _owner []common.Address, _spender []common.Address) (*L2ERC20ApprovalIterator, error) {
+
+	var _ownerRule []interface{}
+	for _, _ownerItem := range _owner {
+		_ownerRule = append(_ownerRule, _ownerItem)
+	}
+	var _spenderRule []interface{}
+	for _, _spenderItem := range _spender {
+		_spenderRule = append(_spenderRule, _spenderItem)
+	}
+
+	logs, sub, err := _L2ERC20.contract.FilterLogs(opts, "Approval", _ownerRule, _spenderRule)
+	if err != nil {
+		return nil, err
+	}
+	return &L2ERC20ApprovalIterator{contract: _L2ERC20.contract, event: "Approval", logs: logs, sub: sub}, nil
+}
+
+// WatchApproval is a free log subscription operation binding the contract event 0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925.
+//
+// Solidity: event Approval(address indexed _owner, address indexed _spender, uint256 _value)
+func (_L2ERC20 *L2ERC20Filterer) WatchApproval(opts *bind.WatchOpts, sink chan<- *L2ERC20Approval, _owner []common.Address, _spender []common.Address) (event.Subscription, error) {
+
+	var _ownerRule []interface{}
+	for _, _ownerItem := range _owner {
+		_ownerRule = append(_ownerRule, _ownerItem)
+	}
+	var _spenderRule []interface{}
+	for _, _spenderItem := range _spender {
+		_spenderRule = append(_spenderRule, _spenderItem)
+	}
+
+	logs, sub, err := _L2ERC20.contract.WatchLogs(opts, "Approval", _ownerRule, _spenderRule)
+	if err != nil {
+		return nil, err
+	}
+	return event.NewSubscription(func(quit <-chan struct{}) error {
+		defer sub.Unsubscribe()
+		for {
+			select {
+			case log := <-logs:
+				// New log arrived, parse the event and forward to the user
+				event := new(L2ERC20Approval)
+				if err := _L2ERC20.contract.UnpackLog(event, "Approval", log); err != nil {
+					return err
+				}
+				event.Raw = log
+
+				select {
+				case sink <- event:
+				case err := <-sub.Err():
+					return err
+				case <-quit:
+					return nil
+				}
+			case err := <-sub.Err():
+				return err
+			case <-quit:
+				return nil
+			}
+		}
+	}), nil
+}
+
+// ParseApproval is a log parse operation binding the contract event 0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925.
+//
+// Solidity: event Approval(address indexed _owner, address indexed _spender, uint256 _value)
+func (_L2ERC20 *L2ERC20Filterer) ParseApproval(log types.Log) (*L2ERC20Approval, error) {
+	event := new(L2ERC20Approval)
+	if err := _L2ERC20.contract.UnpackLog(event, "Approval", log); err != nil {
+		return nil, err
+	}
+	return event, nil
+}
+
+// L2ERC20TransferIterator is returned from FilterTransfer and is used to iterate over the raw logs and unpacked data for Transfer events raised by the L2ERC20 contract.
+type L2ERC20TransferIterator struct {
+	Event *L2ERC20Transfer // Event containing the contract specifics and raw log
+
+	contract *bind.BoundContract // Generic contract to use for unpacking event data
+	event    string              // Event name to use for unpacking event data
+
+	logs chan types.Log        // Log channel receiving the found contract events
+	sub  ethereum.Subscription // Subscription for errors, completion and termination
+	done bool                  // Whether the subscription completed delivering logs
+	fail error                 // Occurred error to stop iteration
+}
+
+// Next advances the iterator to the subsequent event, returning whether there
+// are any more events found. In case of a retrieval or parsing error, false is
+// returned and Error() can be queried for the exact failure.
+func (it *L2ERC20TransferIterator) Next() bool {
+	// If the iterator failed, stop iterating
+	if it.fail != nil {
+		return false
+	}
+	// If the iterator completed, deliver directly whatever's available
+	if it.done {
+		select {
+		case log := <-it.logs:
+			it.Event = new(L2ERC20Transfer)
+			if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+				it.fail = err
+				return false
+			}
+			it.Event.Raw = log
+			return true
+
+		default:
+			return false
+		}
+	}
+	// Iterator still in progress, wait for either a data or an error event
+	select {
+	case log := <-it.logs:
+		it.Event = new(L2ERC20Transfer)
+		if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+			it.fail = err
+			return false
+		}
+		it.Event.Raw = log
+		return true
+
+	case err := <-it.sub.Err():
+		it.done = true
+		it.fail = err
+		return it.Next()
+	}
+}
+
+// Error returns any retrieval or parsing error occurred during filtering.
+func (it *L2ERC20TransferIterator) Error() error {
+	return it.fail
+}
+
+// Close terminates the iteration process, releasing any pending underlying
+// resources.
+func (it *L2ERC20TransferIterator) Close() error {
+	it.sub.Unsubscribe()
+	return nil
+}
+
+// L2ERC20Transfer represents a Transfer event raised by the L2ERC20 contract.
+type L2ERC20Transfer struct {
+	From  common.Address
+	To    common.Address
+	Value *big.Int
+	Raw   types.Log // Blockchain specific contextual infos
+}
+
+// FilterTransfer is a free log retrieval operation binding the contract event 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef.
+//
+// Solidity: event Transfer(address indexed _from, address indexed _to, uint256 _value)
+func (_L2ERC20 *L2ERC20Filterer) FilterTransfer(opts *bind.FilterOpts, _from []common.Address, _to []common.Address) (*L2ERC20TransferIterator, error) {
+
+	var _fromRule []interface{}
+	for _, _fromItem := range _from {
+		_fromRule = append(_fromRule, _fromItem)
+	}
+	var _toRule []interface{}
+	for _, _toItem := range _to {
+		_toRule = append(_toRule, _toItem)
+	}
+
+	logs, sub, err := _L2ERC20.contract.FilterLogs(opts, "Transfer", _fromRule, _toRule)
+	if err != nil {
+		return nil, err
+	}
+	return &L2ERC20TransferIterator{contract: _L2ERC20.contract, event: "Transfer", logs: logs, sub: sub}, nil
+}
+
+// WatchTransfer is a free log subscription operation binding the contract event 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef.
+//
+// Solidity: event Transfer(address indexed _from, address indexed _to, uint256 _value)
+func (_L2ERC20 *L2ERC20Filterer) WatchTransfer(opts *bind.WatchOpts, sink chan<- *L2ERC20Transfer, _from []common.Address, _to []common.Address) (event.Subscription, error) {
+
+	var _fromRule []interface{}
+	for _, _fromItem := range _from {
+		_fromRule = append(_fromRule, _fromItem)
+	}
+	var _toRule []interface{}
+	for _, _toItem := range _to {
+		_toRule = append(_toRule, _toItem)
+	}
+
+	logs, sub, err := _L2ERC20.contract.WatchLogs(opts, "Transfer", _fromRule, _toRule)
+	if err != nil {
+		return nil, err
+	}
+	return event.NewSubscription(func(quit <-chan struct{}) error {
+		defer sub.Unsubscribe()
+		for {
+			select {
+			case log := <-logs:
+				// New log arrived, parse the event and forward to the user
+				event := new(L2ERC20Transfer)
+				if err := _L2ERC20.contract.UnpackLog(event, "Transfer", log); err != nil {
+					return err
+				}
+				event.Raw = log
+
+				select {
+				case sink <- event:
+				case err := <-sub.Err():
+					return err
+				case <-quit:
+					return nil
+				}
+			case err := <-sub.Err():
+				return err
+			case <-quit:
+				return nil
+			}
+		}
+	}), nil
+}
+
+// ParseTransfer is a log parse operation binding the contract event 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef.
+//
+// Solidity: event Transfer(address indexed _from, address indexed _to, uint256 _value)
+func (_L2ERC20 *L2ERC20Filterer) ParseTransfer(log types.Log) (*L2ERC20Transfer, error) {
+	event := new(L2ERC20Transfer)
+	if err := _L2ERC20.contract.UnpackLog(event, "Transfer", log); err != nil {
+		return nil, err
+	}
+	return event, nil
+}

go/indexer/bindings/scc/statecommitmentchain.go

+// Code generated - DO NOT EDIT.
+// This file is a generated binding and any manual changes will be lost.
+
+package scc
+
+import (
+	"errors"
+	"math/big"
+	"strings"
+
+	ethereum "github.com/ethereum/go-ethereum"
+	"github.com/ethereum/go-ethereum/accounts/abi"
+	"github.com/ethereum/go-ethereum/accounts/abi/bind"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/event"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var (
+	_ = errors.New
+	_ = big.NewInt
+	_ = strings.NewReader
+	_ = ethereum.NotFound
+	_ = bind.Bind
+	_ = common.Big1
+	_ = types.BloomLookup
+	_ = event.NewSubscription
+)
+
+// Lib_OVMCodecChainBatchHeader is an auto generated low-level Go binding around an user-defined struct.
+type Lib_OVMCodecChainBatchHeader struct {
+	BatchIndex        *big.Int
+	BatchRoot         [32]byte
+	BatchSize         *big.Int
+	PrevTotalElements *big.Int
+	ExtraData         []byte
+}
+
+// Lib_OVMCodecChainInclusionProof is an auto generated low-level Go binding around an user-defined struct.
+type Lib_OVMCodecChainInclusionProof struct {
+	Index    *big.Int
+	Siblings [][32]byte
+}
+
+// StateCommitmentChainMetaData contains all meta data concerning the StateCommitmentChain contract.
+var StateCommitmentChainMetaData = &bind.MetaData{
+	ABI: "[{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_libAddressManager\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"_fraudProofWindow\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"_sequencerPublishWindow\",\"type\":\"uint256\"}],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"uint256\",\"name\":\"_batchIndex\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"bytes32\",\"name\":\"_batchRoot\",\"type\":\"bytes32\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"_batchSize\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"_prevTotalElements\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"bytes\",\"name\":\"_extraData\",\"type\":\"bytes\"}],\"name\":\"StateBatchAppended\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"uint256\",\"name\":\"_batchIndex\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"bytes32\",\"name\":\"_batchRoot\",\"type\":\"bytes32\"}],\"name\":\"StateBatchDeleted\",\"type\":\"event\"},{\"inputs\":[],\"name\":\"FRAUD_PROOF_WINDOW\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"SEQUENCER_PUBLISH_WINDOW\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"bytes32[]\",\"name\":\"_batch\",\"type\":\"bytes32[]\"},{\"internalType\":\"uint256\",\"name\":\"_shouldStartAtElement\",\"type\":\"uint256\"}],\"name\":\"appendStateBatch\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"batches\",\"outputs\":[{\"internalType\":\"contractIChainStorageContainer\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"components\":[{\"internalType\":\"uint256\",\"name\":\"batchIndex\",\"type\":\"uint256\"},{\"internalType\":\"bytes32\",\"name\":\"batchRoot\",\"type\":\"bytes32\"},{\"internalType\":\"uint256\",\"name\":\"batchSize\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"prevTotalElements\",\"type\":\"uint256\"},{\"internalType\":\"bytes\",\"name\":\"extraData\",\"type\":\"bytes\"}],\"internalType\":\"structLib_OVMCodec.ChainBatchHeader\",\"name\":\"_batchHeader\",\"type\":\"tuple\"}],\"name\":\"deleteStateBatch\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"getLastSequencerTimestamp\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"_lastSequencerTimestamp\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"getTotalBatches\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"_totalBatches\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"getTotalElements\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"_totalElements\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"components\":[{\"internalType\":\"uint256\",\"name\":\"batchIndex\",\"type\":\"uint256\"},{\"internalType\":\"bytes32\",\"name\":\"batchRoot\",\"type\":\"bytes32\"},{\"internalType\":\"uint256\",\"name\":\"batchSize\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"prevTotalElements\",\"type\":\"uint256\"},{\"internalType\":\"bytes\",\"name\":\"extraData\",\"type\":\"bytes\"}],\"internalType\":\"structLib_OVMCodec.ChainBatchHeader\",\"name\":\"_batchHeader\",\"type\":\"tuple\"}],\"name\":\"insideFraudProofWindow\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"_inside\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"libAddressManager\",\"outputs\":[{\"internalType\":\"contractLib_AddressManager\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"string\",\"name\":\"_name\",\"type\":\"string\"}],\"name\":\"resolve\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"_element\",\"type\":\"bytes32\"},{\"components\":[{\"internalType\":\"uint256\",\"name\":\"batchIndex\",\"type\":\"uint256\"},{\"internalType\":\"bytes32\",\"name\":\"batchRoot\",\"type\":\"bytes32\"},{\"internalType\":\"uint256\",\"name\":\"batchSize\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"prevTotalElements\",\"type\":\"uint256\"},{\"internalType\":\"bytes\",\"name\":\"extraData\",\"type\":\"bytes\"}],\"internalType\":\"structLib_OVMCodec.ChainBatchHeader\",\"name\":\"_batchHeader\",\"type\":\"tuple\"},{\"components\":[{\"internalType\":\"uint256\",\"name\":\"index\",\"type\":\"uint256\"},{\"internalType\":\"bytes32[]\",\"name\":\"siblings\",\"type\":\"bytes32[]\"}],\"internalType\":\"structLib_OVMCodec.ChainInclusionProof\",\"name\":\"_proof\",\"type\":\"tuple\"}],\"name\":\"verifyStateCommitment\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"}]",
+	Bin: 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+}
+
+// StateCommitmentChainABI is the input ABI used to generate the binding from.
+// Deprecated: Use StateCommitmentChainMetaData.ABI instead.
+var StateCommitmentChainABI = StateCommitmentChainMetaData.ABI
+
+// StateCommitmentChainBin is the compiled bytecode used for deploying new contracts.
+// Deprecated: Use StateCommitmentChainMetaData.Bin instead.
+var StateCommitmentChainBin = StateCommitmentChainMetaData.Bin
+
+// DeployStateCommitmentChain deploys a new Ethereum contract, binding an instance of StateCommitmentChain to it.
+func DeployStateCommitmentChain(auth *bind.TransactOpts, backend bind.ContractBackend, _libAddressManager common.Address, _fraudProofWindow *big.Int, _sequencerPublishWindow *big.Int) (common.Address, *types.Transaction, *StateCommitmentChain, error) {
+	parsed, err := StateCommitmentChainMetaData.GetAbi()
+	if err != nil {
+		return common.Address{}, nil, nil, err
+	}
+	if parsed == nil {
+		return common.Address{}, nil, nil, errors.New("GetABI returned nil")
+	}
+
+	address, tx, contract, err := bind.DeployContract(auth, *parsed, common.FromHex(StateCommitmentChainBin), backend, _libAddressManager, _fraudProofWindow, _sequencerPublishWindow)
+	if err != nil {
+		return common.Address{}, nil, nil, err
+	}
+	return address, tx, &StateCommitmentChain{StateCommitmentChainCaller: StateCommitmentChainCaller{contract: contract}, StateCommitmentChainTransactor: StateCommitmentChainTransactor{contract: contract}, StateCommitmentChainFilterer: StateCommitmentChainFilterer{contract: contract}}, nil
+}
+
+// StateCommitmentChain is an auto generated Go binding around an Ethereum contract.
+type StateCommitmentChain struct {
+	StateCommitmentChainCaller     // Read-only binding to the contract
+	StateCommitmentChainTransactor // Write-only binding to the contract
+	StateCommitmentChainFilterer   // Log filterer for contract events
+}
+
+// StateCommitmentChainCaller is an auto generated read-only Go binding around an Ethereum contract.
+type StateCommitmentChainCaller struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// StateCommitmentChainTransactor is an auto generated write-only Go binding around an Ethereum contract.
+type StateCommitmentChainTransactor struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// StateCommitmentChainFilterer is an auto generated log filtering Go binding around an Ethereum contract events.
+type StateCommitmentChainFilterer struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// StateCommitmentChainSession is an auto generated Go binding around an Ethereum contract,
+// with pre-set call and transact options.
+type StateCommitmentChainSession struct {
+	Contract     *StateCommitmentChain // Generic contract binding to set the session for
+	CallOpts     bind.CallOpts         // Call options to use throughout this session
+	TransactOpts bind.TransactOpts     // Transaction auth options to use throughout this session
+}
+
+// StateCommitmentChainCallerSession is an auto generated read-only Go binding around an Ethereum contract,
+// with pre-set call options.
+type StateCommitmentChainCallerSession struct {
+	Contract *StateCommitmentChainCaller // Generic contract caller binding to set the session for
+	CallOpts bind.CallOpts               // Call options to use throughout this session
+}
+
+// StateCommitmentChainTransactorSession is an auto generated write-only Go binding around an Ethereum contract,
+// with pre-set transact options.
+type StateCommitmentChainTransactorSession struct {
+	Contract     *StateCommitmentChainTransactor // Generic contract transactor binding to set the session for
+	TransactOpts bind.TransactOpts               // Transaction auth options to use throughout this session
+}
+
+// StateCommitmentChainRaw is an auto generated low-level Go binding around an Ethereum contract.
+type StateCommitmentChainRaw struct {
+	Contract *StateCommitmentChain // Generic contract binding to access the raw methods on
+}
+
+// StateCommitmentChainCallerRaw is an auto generated low-level read-only Go binding around an Ethereum contract.
+type StateCommitmentChainCallerRaw struct {
+	Contract *StateCommitmentChainCaller // Generic read-only contract binding to access the raw methods on
+}
+
+// StateCommitmentChainTransactorRaw is an auto generated low-level write-only Go binding around an Ethereum contract.
+type StateCommitmentChainTransactorRaw struct {
+	Contract *StateCommitmentChainTransactor // Generic write-only contract binding to access the raw methods on
+}
+
+// NewStateCommitmentChain creates a new instance of StateCommitmentChain, bound to a specific deployed contract.
+func NewStateCommitmentChain(address common.Address, backend bind.ContractBackend) (*StateCommitmentChain, error) {
+	contract, err := bindStateCommitmentChain(address, backend, backend, backend)
+	if err != nil {
+		return nil, err
+	}
+	return &StateCommitmentChain{StateCommitmentChainCaller: StateCommitmentChainCaller{contract: contract}, StateCommitmentChainTransactor: StateCommitmentChainTransactor{contract: contract}, StateCommitmentChainFilterer: StateCommitmentChainFilterer{contract: contract}}, nil
+}
+
+// NewStateCommitmentChainCaller creates a new read-only instance of StateCommitmentChain, bound to a specific deployed contract.
+func NewStateCommitmentChainCaller(address common.Address, caller bind.ContractCaller) (*StateCommitmentChainCaller, error) {
+	contract, err := bindStateCommitmentChain(address, caller, nil, nil)
+	if err != nil {
+		return nil, err
+	}
+	return &StateCommitmentChainCaller{contract: contract}, nil
+}
+
+// NewStateCommitmentChainTransactor creates a new write-only instance of StateCommitmentChain, bound to a specific deployed contract.
+func NewStateCommitmentChainTransactor(address common.Address, transactor bind.ContractTransactor) (*StateCommitmentChainTransactor, error) {
+	contract, err := bindStateCommitmentChain(address, nil, transactor, nil)
+	if err != nil {
+		return nil, err
+	}
+	return &StateCommitmentChainTransactor{contract: contract}, nil
+}
+
+// NewStateCommitmentChainFilterer creates a new log filterer instance of StateCommitmentChain, bound to a specific deployed contract.
+func NewStateCommitmentChainFilterer(address common.Address, filterer bind.ContractFilterer) (*StateCommitmentChainFilterer, error) {
+	contract, err := bindStateCommitmentChain(address, nil, nil, filterer)
+	if err != nil {
+		return nil, err
+	}
+	return &StateCommitmentChainFilterer{contract: contract}, nil
+}
+
+// bindStateCommitmentChain binds a generic wrapper to an already deployed contract.
+func bindStateCommitmentChain(address common.Address, caller bind.ContractCaller, transactor bind.ContractTransactor, filterer bind.ContractFilterer) (*bind.BoundContract, error) {
+	parsed, err := abi.JSON(strings.NewReader(StateCommitmentChainABI))
+	if err != nil {
+		return nil, err
+	}
+	return bind.NewBoundContract(address, parsed, caller, transactor, filterer), nil
+}
+
+// Call invokes the (constant) contract method with params as input values and
+// sets the output to result. The result type might be a single field for simple
+// returns, a slice of interfaces for anonymous returns and a struct for named
+// returns.
+func (_StateCommitmentChain *StateCommitmentChainRaw) Call(opts *bind.CallOpts, result *[]interface{}, method string, params ...interface{}) error {
+	return _StateCommitmentChain.Contract.StateCommitmentChainCaller.contract.Call(opts, result, method, params...)
+}
+
+// Transfer initiates a plain transaction to move funds to the contract, calling
+// its default method if one is available.
+func (_StateCommitmentChain *StateCommitmentChainRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _StateCommitmentChain.Contract.StateCommitmentChainTransactor.contract.Transfer(opts)
+}
+
+// Transact invokes the (paid) contract method with params as input values.
+func (_StateCommitmentChain *StateCommitmentChainRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
+	return _StateCommitmentChain.Contract.StateCommitmentChainTransactor.contract.Transact(opts, method, params...)
+}
+
+// Call invokes the (constant) contract method with params as input values and
+// sets the output to result. The result type might be a single field for simple
+// returns, a slice of interfaces for anonymous returns and a struct for named
+// returns.
+func (_StateCommitmentChain *StateCommitmentChainCallerRaw) Call(opts *bind.CallOpts, result *[]interface{}, method string, params ...interface{}) error {
+	return _StateCommitmentChain.Contract.contract.Call(opts, result, method, params...)
+}
+
+// Transfer initiates a plain transaction to move funds to the contract, calling
+// its default method if one is available.
+func (_StateCommitmentChain *StateCommitmentChainTransactorRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _StateCommitmentChain.Contract.contract.Transfer(opts)
+}
+
+// Transact invokes the (paid) contract method with params as input values.
+func (_StateCommitmentChain *StateCommitmentChainTransactorRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
+	return _StateCommitmentChain.Contract.contract.Transact(opts, method, params...)
+}
+
+// FRAUDPROOFWINDOW is a free data retrieval call binding the contract method 0xc17b291b.
+//
+// Solidity: function FRAUD_PROOF_WINDOW() view returns(uint256)
+func (_StateCommitmentChain *StateCommitmentChainCaller) FRAUDPROOFWINDOW(opts *bind.CallOpts) (*big.Int, error) {
+	var out []interface{}
+	err := _StateCommitmentChain.contract.Call(opts, &out, "FRAUD_PROOF_WINDOW")
+
+	if err != nil {
+		return *new(*big.Int), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(*big.Int)).(**big.Int)
+
+	return out0, err
+
+}
+
+// FRAUDPROOFWINDOW is a free data retrieval call binding the contract method 0xc17b291b.
+//
+// Solidity: function FRAUD_PROOF_WINDOW() view returns(uint256)
+func (_StateCommitmentChain *StateCommitmentChainSession) FRAUDPROOFWINDOW() (*big.Int, error) {
+	return _StateCommitmentChain.Contract.FRAUDPROOFWINDOW(&_StateCommitmentChain.CallOpts)
+}
+
+// FRAUDPROOFWINDOW is a free data retrieval call binding the contract method 0xc17b291b.
+//
+// Solidity: function FRAUD_PROOF_WINDOW() view returns(uint256)
+func (_StateCommitmentChain *StateCommitmentChainCallerSession) FRAUDPROOFWINDOW() (*big.Int, error) {
+	return _StateCommitmentChain.Contract.FRAUDPROOFWINDOW(&_StateCommitmentChain.CallOpts)
+}
+
+// SEQUENCERPUBLISHWINDOW is a free data retrieval call binding the contract method 0x81eb62ef.
+//
+// Solidity: function SEQUENCER_PUBLISH_WINDOW() view returns(uint256)
+func (_StateCommitmentChain *StateCommitmentChainCaller) SEQUENCERPUBLISHWINDOW(opts *bind.CallOpts) (*big.Int, error) {
+	var out []interface{}
+	err := _StateCommitmentChain.contract.Call(opts, &out, "SEQUENCER_PUBLISH_WINDOW")
+
+	if err != nil {
+		return *new(*big.Int), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(*big.Int)).(**big.Int)
+
+	return out0, err
+
+}
+
+// SEQUENCERPUBLISHWINDOW is a free data retrieval call binding the contract method 0x81eb62ef.
+//
+// Solidity: function SEQUENCER_PUBLISH_WINDOW() view returns(uint256)
+func (_StateCommitmentChain *StateCommitmentChainSession) SEQUENCERPUBLISHWINDOW() (*big.Int, error) {
+	return _StateCommitmentChain.Contract.SEQUENCERPUBLISHWINDOW(&_StateCommitmentChain.CallOpts)
+}
+
+// SEQUENCERPUBLISHWINDOW is a free data retrieval call binding the contract method 0x81eb62ef.
+//
+// Solidity: function SEQUENCER_PUBLISH_WINDOW() view returns(uint256)
+func (_StateCommitmentChain *StateCommitmentChainCallerSession) SEQUENCERPUBLISHWINDOW() (*big.Int, error) {
+	return _StateCommitmentChain.Contract.SEQUENCERPUBLISHWINDOW(&_StateCommitmentChain.CallOpts)
+}
+
+// Batches is a free data retrieval call binding the contract method 0xcfdf677e.
+//
+// Solidity: function batches() view returns(address)
+func (_StateCommitmentChain *StateCommitmentChainCaller) Batches(opts *bind.CallOpts) (common.Address, error) {
+	var out []interface{}
+	err := _StateCommitmentChain.contract.Call(opts, &out, "batches")
+
+	if err != nil {
+		return *new(common.Address), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(common.Address)).(*common.Address)
+
+	return out0, err
+
+}
+
+// Batches is a free data retrieval call binding the contract method 0xcfdf677e.
+//
+// Solidity: function batches() view returns(address)
+func (_StateCommitmentChain *StateCommitmentChainSession) Batches() (common.Address, error) {
+	return _StateCommitmentChain.Contract.Batches(&_StateCommitmentChain.CallOpts)
+}
+
+// Batches is a free data retrieval call binding the contract method 0xcfdf677e.
+//
+// Solidity: function batches() view returns(address)
+func (_StateCommitmentChain *StateCommitmentChainCallerSession) Batches() (common.Address, error) {
+	return _StateCommitmentChain.Contract.Batches(&_StateCommitmentChain.CallOpts)
+}
+
+// GetLastSequencerTimestamp is a free data retrieval call binding the contract method 0x7ad168a0.
+//
+// Solidity: function getLastSequencerTimestamp() view returns(uint256 _lastSequencerTimestamp)
+func (_StateCommitmentChain *StateCommitmentChainCaller) GetLastSequencerTimestamp(opts *bind.CallOpts) (*big.Int, error) {
+	var out []interface{}
+	err := _StateCommitmentChain.contract.Call(opts, &out, "getLastSequencerTimestamp")
+
+	if err != nil {
+		return *new(*big.Int), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(*big.Int)).(**big.Int)
+
+	return out0, err
+
+}
+
+// GetLastSequencerTimestamp is a free data retrieval call binding the contract method 0x7ad168a0.
+//
+// Solidity: function getLastSequencerTimestamp() view returns(uint256 _lastSequencerTimestamp)
+func (_StateCommitmentChain *StateCommitmentChainSession) GetLastSequencerTimestamp() (*big.Int, error) {
+	return _StateCommitmentChain.Contract.GetLastSequencerTimestamp(&_StateCommitmentChain.CallOpts)
+}
+
+// GetLastSequencerTimestamp is a free data retrieval call binding the contract method 0x7ad168a0.
+//
+// Solidity: function getLastSequencerTimestamp() view returns(uint256 _lastSequencerTimestamp)
+func (_StateCommitmentChain *StateCommitmentChainCallerSession) GetLastSequencerTimestamp() (*big.Int, error) {
+	return _StateCommitmentChain.Contract.GetLastSequencerTimestamp(&_StateCommitmentChain.CallOpts)
+}
+
+// GetTotalBatches is a free data retrieval call binding the contract method 0xe561dddc.
+//
+// Solidity: function getTotalBatches() view returns(uint256 _totalBatches)
+func (_StateCommitmentChain *StateCommitmentChainCaller) GetTotalBatches(opts *bind.CallOpts) (*big.Int, error) {
+	var out []interface{}
+	err := _StateCommitmentChain.contract.Call(opts, &out, "getTotalBatches")
+
+	if err != nil {
+		return *new(*big.Int), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(*big.Int)).(**big.Int)
+
+	return out0, err
+
+}
+
+// GetTotalBatches is a free data retrieval call binding the contract method 0xe561dddc.
+//
+// Solidity: function getTotalBatches() view returns(uint256 _totalBatches)
+func (_StateCommitmentChain *StateCommitmentChainSession) GetTotalBatches() (*big.Int, error) {
+	return _StateCommitmentChain.Contract.GetTotalBatches(&_StateCommitmentChain.CallOpts)
+}
+
+// GetTotalBatches is a free data retrieval call binding the contract method 0xe561dddc.
+//
+// Solidity: function getTotalBatches() view returns(uint256 _totalBatches)
+func (_StateCommitmentChain *StateCommitmentChainCallerSession) GetTotalBatches() (*big.Int, error) {
+	return _StateCommitmentChain.Contract.GetTotalBatches(&_StateCommitmentChain.CallOpts)
+}
+
+// GetTotalElements is a free data retrieval call binding the contract method 0x7aa63a86.
+//
+// Solidity: function getTotalElements() view returns(uint256 _totalElements)
+func (_StateCommitmentChain *StateCommitmentChainCaller) GetTotalElements(opts *bind.CallOpts) (*big.Int, error) {
+	var out []interface{}
+	err := _StateCommitmentChain.contract.Call(opts, &out, "getTotalElements")
+
+	if err != nil {
+		return *new(*big.Int), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(*big.Int)).(**big.Int)
+
+	return out0, err
+
+}
+
+// GetTotalElements is a free data retrieval call binding the contract method 0x7aa63a86.
+//
+// Solidity: function getTotalElements() view returns(uint256 _totalElements)
+func (_StateCommitmentChain *StateCommitmentChainSession) GetTotalElements() (*big.Int, error) {
+	return _StateCommitmentChain.Contract.GetTotalElements(&_StateCommitmentChain.CallOpts)
+}
+
+// GetTotalElements is a free data retrieval call binding the contract method 0x7aa63a86.
+//
+// Solidity: function getTotalElements() view returns(uint256 _totalElements)
+func (_StateCommitmentChain *StateCommitmentChainCallerSession) GetTotalElements() (*big.Int, error) {
+	return _StateCommitmentChain.Contract.GetTotalElements(&_StateCommitmentChain.CallOpts)
+}
+
+// InsideFraudProofWindow is a free data retrieval call binding the contract method 0x9418bddd.
+//
+// Solidity: function insideFraudProofWindow((uint256,bytes32,uint256,uint256,bytes) _batchHeader) view returns(bool _inside)
+func (_StateCommitmentChain *StateCommitmentChainCaller) InsideFraudProofWindow(opts *bind.CallOpts, _batchHeader Lib_OVMCodecChainBatchHeader) (bool, error) {
+	var out []interface{}
+	err := _StateCommitmentChain.contract.Call(opts, &out, "insideFraudProofWindow", _batchHeader)
+
+	if err != nil {
+		return *new(bool), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(bool)).(*bool)
+
+	return out0, err
+
+}
+
+// InsideFraudProofWindow is a free data retrieval call binding the contract method 0x9418bddd.
+//
+// Solidity: function insideFraudProofWindow((uint256,bytes32,uint256,uint256,bytes) _batchHeader) view returns(bool _inside)
+func (_StateCommitmentChain *StateCommitmentChainSession) InsideFraudProofWindow(_batchHeader Lib_OVMCodecChainBatchHeader) (bool, error) {
+	return _StateCommitmentChain.Contract.InsideFraudProofWindow(&_StateCommitmentChain.CallOpts, _batchHeader)
+}
+
+// InsideFraudProofWindow is a free data retrieval call binding the contract method 0x9418bddd.
+//
+// Solidity: function insideFraudProofWindow((uint256,bytes32,uint256,uint256,bytes) _batchHeader) view returns(bool _inside)
+func (_StateCommitmentChain *StateCommitmentChainCallerSession) InsideFraudProofWindow(_batchHeader Lib_OVMCodecChainBatchHeader) (bool, error) {
+	return _StateCommitmentChain.Contract.InsideFraudProofWindow(&_StateCommitmentChain.CallOpts, _batchHeader)
+}
+
+// LibAddressManager is a free data retrieval call binding the contract method 0x299ca478.
+//
+// Solidity: function libAddressManager() view returns(address)
+func (_StateCommitmentChain *StateCommitmentChainCaller) LibAddressManager(opts *bind.CallOpts) (common.Address, error) {
+	var out []interface{}
+	err := _StateCommitmentChain.contract.Call(opts, &out, "libAddressManager")
+
+	if err != nil {
+		return *new(common.Address), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(common.Address)).(*common.Address)
+
+	return out0, err
+
+}
+
+// LibAddressManager is a free data retrieval call binding the contract method 0x299ca478.
+//
+// Solidity: function libAddressManager() view returns(address)
+func (_StateCommitmentChain *StateCommitmentChainSession) LibAddressManager() (common.Address, error) {
+	return _StateCommitmentChain.Contract.LibAddressManager(&_StateCommitmentChain.CallOpts)
+}
+
+// LibAddressManager is a free data retrieval call binding the contract method 0x299ca478.
+//
+// Solidity: function libAddressManager() view returns(address)
+func (_StateCommitmentChain *StateCommitmentChainCallerSession) LibAddressManager() (common.Address, error) {
+	return _StateCommitmentChain.Contract.LibAddressManager(&_StateCommitmentChain.CallOpts)
+}
+
+// Resolve is a free data retrieval call binding the contract method 0x461a4478.
+//
+// Solidity: function resolve(string _name) view returns(address)
+func (_StateCommitmentChain *StateCommitmentChainCaller) Resolve(opts *bind.CallOpts, _name string) (common.Address, error) {
+	var out []interface{}
+	err := _StateCommitmentChain.contract.Call(opts, &out, "resolve", _name)
+
+	if err != nil {
+		return *new(common.Address), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(common.Address)).(*common.Address)
+
+	return out0, err
+
+}
+
+// Resolve is a free data retrieval call binding the contract method 0x461a4478.
+//
+// Solidity: function resolve(string _name) view returns(address)
+func (_StateCommitmentChain *StateCommitmentChainSession) Resolve(_name string) (common.Address, error) {
+	return _StateCommitmentChain.Contract.Resolve(&_StateCommitmentChain.CallOpts, _name)
+}
+
+// Resolve is a free data retrieval call binding the contract method 0x461a4478.
+//
+// Solidity: function resolve(string _name) view returns(address)
+func (_StateCommitmentChain *StateCommitmentChainCallerSession) Resolve(_name string) (common.Address, error) {
+	return _StateCommitmentChain.Contract.Resolve(&_StateCommitmentChain.CallOpts, _name)
+}
+
+// VerifyStateCommitment is a free data retrieval call binding the contract method 0x4d69ee57.
+//
+// Solidity: function verifyStateCommitment(bytes32 _element, (uint256,bytes32,uint256,uint256,bytes) _batchHeader, (uint256,bytes32[]) _proof) view returns(bool)
+func (_StateCommitmentChain *StateCommitmentChainCaller) VerifyStateCommitment(opts *bind.CallOpts, _element [32]byte, _batchHeader Lib_OVMCodecChainBatchHeader, _proof Lib_OVMCodecChainInclusionProof) (bool, error) {
+	var out []interface{}
+	err := _StateCommitmentChain.contract.Call(opts, &out, "verifyStateCommitment", _element, _batchHeader, _proof)
+
+	if err != nil {
+		return *new(bool), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(bool)).(*bool)
+
+	return out0, err
+
+}
+
+// VerifyStateCommitment is a free data retrieval call binding the contract method 0x4d69ee57.
+//
+// Solidity: function verifyStateCommitment(bytes32 _element, (uint256,bytes32,uint256,uint256,bytes) _batchHeader, (uint256,bytes32[]) _proof) view returns(bool)
+func (_StateCommitmentChain *StateCommitmentChainSession) VerifyStateCommitment(_element [32]byte, _batchHeader Lib_OVMCodecChainBatchHeader, _proof Lib_OVMCodecChainInclusionProof) (bool, error) {
+	return _StateCommitmentChain.Contract.VerifyStateCommitment(&_StateCommitmentChain.CallOpts, _element, _batchHeader, _proof)
+}
+
+// VerifyStateCommitment is a free data retrieval call binding the contract method 0x4d69ee57.
+//
+// Solidity: function verifyStateCommitment(bytes32 _element, (uint256,bytes32,uint256,uint256,bytes) _batchHeader, (uint256,bytes32[]) _proof) view returns(bool)
+func (_StateCommitmentChain *StateCommitmentChainCallerSession) VerifyStateCommitment(_element [32]byte, _batchHeader Lib_OVMCodecChainBatchHeader, _proof Lib_OVMCodecChainInclusionProof) (bool, error) {
+	return _StateCommitmentChain.Contract.VerifyStateCommitment(&_StateCommitmentChain.CallOpts, _element, _batchHeader, _proof)
+}
+
+// AppendStateBatch is a paid mutator transaction binding the contract method 0x8ca5cbb9.
+//
+// Solidity: function appendStateBatch(bytes32[] _batch, uint256 _shouldStartAtElement) returns()
+func (_StateCommitmentChain *StateCommitmentChainTransactor) AppendStateBatch(opts *bind.TransactOpts, _batch [][32]byte, _shouldStartAtElement *big.Int) (*types.Transaction, error) {
+	return _StateCommitmentChain.contract.Transact(opts, "appendStateBatch", _batch, _shouldStartAtElement)
+}
+
+// AppendStateBatch is a paid mutator transaction binding the contract method 0x8ca5cbb9.
+//
+// Solidity: function appendStateBatch(bytes32[] _batch, uint256 _shouldStartAtElement) returns()
+func (_StateCommitmentChain *StateCommitmentChainSession) AppendStateBatch(_batch [][32]byte, _shouldStartAtElement *big.Int) (*types.Transaction, error) {
+	return _StateCommitmentChain.Contract.AppendStateBatch(&_StateCommitmentChain.TransactOpts, _batch, _shouldStartAtElement)
+}
+
+// AppendStateBatch is a paid mutator transaction binding the contract method 0x8ca5cbb9.
+//
+// Solidity: function appendStateBatch(bytes32[] _batch, uint256 _shouldStartAtElement) returns()
+func (_StateCommitmentChain *StateCommitmentChainTransactorSession) AppendStateBatch(_batch [][32]byte, _shouldStartAtElement *big.Int) (*types.Transaction, error) {
+	return _StateCommitmentChain.Contract.AppendStateBatch(&_StateCommitmentChain.TransactOpts, _batch, _shouldStartAtElement)
+}
+
+// DeleteStateBatch is a paid mutator transaction binding the contract method 0xb8e189ac.
+//
+// Solidity: function deleteStateBatch((uint256,bytes32,uint256,uint256,bytes) _batchHeader) returns()
+func (_StateCommitmentChain *StateCommitmentChainTransactor) DeleteStateBatch(opts *bind.TransactOpts, _batchHeader Lib_OVMCodecChainBatchHeader) (*types.Transaction, error) {
+	return _StateCommitmentChain.contract.Transact(opts, "deleteStateBatch", _batchHeader)
+}
+
+// DeleteStateBatch is a paid mutator transaction binding the contract method 0xb8e189ac.
+//
+// Solidity: function deleteStateBatch((uint256,bytes32,uint256,uint256,bytes) _batchHeader) returns()
+func (_StateCommitmentChain *StateCommitmentChainSession) DeleteStateBatch(_batchHeader Lib_OVMCodecChainBatchHeader) (*types.Transaction, error) {
+	return _StateCommitmentChain.Contract.DeleteStateBatch(&_StateCommitmentChain.TransactOpts, _batchHeader)
+}
+
+// DeleteStateBatch is a paid mutator transaction binding the contract method 0xb8e189ac.
+//
+// Solidity: function deleteStateBatch((uint256,bytes32,uint256,uint256,bytes) _batchHeader) returns()
+func (_StateCommitmentChain *StateCommitmentChainTransactorSession) DeleteStateBatch(_batchHeader Lib_OVMCodecChainBatchHeader) (*types.Transaction, error) {
+	return _StateCommitmentChain.Contract.DeleteStateBatch(&_StateCommitmentChain.TransactOpts, _batchHeader)
+}
+
+// StateCommitmentChainStateBatchAppendedIterator is returned from FilterStateBatchAppended and is used to iterate over the raw logs and unpacked data for StateBatchAppended events raised by the StateCommitmentChain contract.
+type StateCommitmentChainStateBatchAppendedIterator struct {
+	Event *StateCommitmentChainStateBatchAppended // Event containing the contract specifics and raw log
+
+	contract *bind.BoundContract // Generic contract to use for unpacking event data
+	event    string              // Event name to use for unpacking event data
+
+	logs chan types.Log        // Log channel receiving the found contract events
+	sub  ethereum.Subscription // Subscription for errors, completion and termination
+	done bool                  // Whether the subscription completed delivering logs
+	fail error                 // Occurred error to stop iteration
+}
+
+// Next advances the iterator to the subsequent event, returning whether there
+// are any more events found. In case of a retrieval or parsing error, false is
+// returned and Error() can be queried for the exact failure.
+func (it *StateCommitmentChainStateBatchAppendedIterator) Next() bool {
+	// If the iterator failed, stop iterating
+	if it.fail != nil {
+		return false
+	}
+	// If the iterator completed, deliver directly whatever's available
+	if it.done {
+		select {
+		case log := <-it.logs:
+			it.Event = new(StateCommitmentChainStateBatchAppended)
+			if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+				it.fail = err
+				return false
+			}
+			it.Event.Raw = log
+			return true
+
+		default:
+			return false
+		}
+	}
+	// Iterator still in progress, wait for either a data or an error event
+	select {
+	case log := <-it.logs:
+		it.Event = new(StateCommitmentChainStateBatchAppended)
+		if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+			it.fail = err
+			return false
+		}
+		it.Event.Raw = log
+		return true
+
+	case err := <-it.sub.Err():
+		it.done = true
+		it.fail = err
+		return it.Next()
+	}
+}
+
+// Error returns any retrieval or parsing error occurred during filtering.
+func (it *StateCommitmentChainStateBatchAppendedIterator) Error() error {
+	return it.fail
+}
+
+// Close terminates the iteration process, releasing any pending underlying
+// resources.
+func (it *StateCommitmentChainStateBatchAppendedIterator) Close() error {
+	it.sub.Unsubscribe()
+	return nil
+}
+
+// StateCommitmentChainStateBatchAppended represents a StateBatchAppended event raised by the StateCommitmentChain contract.
+type StateCommitmentChainStateBatchAppended struct {
+	BatchIndex        *big.Int
+	BatchRoot         [32]byte
+	BatchSize         *big.Int
+	PrevTotalElements *big.Int
+	ExtraData         []byte
+	Raw               types.Log // Blockchain specific contextual infos
+}
+
+// FilterStateBatchAppended is a free log retrieval operation binding the contract event 0x16be4c5129a4e03cf3350262e181dc02ddfb4a6008d925368c0899fcd97ca9c5.
+//
+// Solidity: event StateBatchAppended(uint256 indexed _batchIndex, bytes32 _batchRoot, uint256 _batchSize, uint256 _prevTotalElements, bytes _extraData)
+func (_StateCommitmentChain *StateCommitmentChainFilterer) FilterStateBatchAppended(opts *bind.FilterOpts, _batchIndex []*big.Int) (*StateCommitmentChainStateBatchAppendedIterator, error) {
+
+	var _batchIndexRule []interface{}
+	for _, _batchIndexItem := range _batchIndex {
+		_batchIndexRule = append(_batchIndexRule, _batchIndexItem)
+	}
+
+	logs, sub, err := _StateCommitmentChain.contract.FilterLogs(opts, "StateBatchAppended", _batchIndexRule)
+	if err != nil {
+		return nil, err
+	}
+	return &StateCommitmentChainStateBatchAppendedIterator{contract: _StateCommitmentChain.contract, event: "StateBatchAppended", logs: logs, sub: sub}, nil
+}
+
+// WatchStateBatchAppended is a free log subscription operation binding the contract event 0x16be4c5129a4e03cf3350262e181dc02ddfb4a6008d925368c0899fcd97ca9c5.
+//
+// Solidity: event StateBatchAppended(uint256 indexed _batchIndex, bytes32 _batchRoot, uint256 _batchSize, uint256 _prevTotalElements, bytes _extraData)
+func (_StateCommitmentChain *StateCommitmentChainFilterer) WatchStateBatchAppended(opts *bind.WatchOpts, sink chan<- *StateCommitmentChainStateBatchAppended, _batchIndex []*big.Int) (event.Subscription, error) {
+
+	var _batchIndexRule []interface{}
+	for _, _batchIndexItem := range _batchIndex {
+		_batchIndexRule = append(_batchIndexRule, _batchIndexItem)
+	}
+
+	logs, sub, err := _StateCommitmentChain.contract.WatchLogs(opts, "StateBatchAppended", _batchIndexRule)
+	if err != nil {
+		return nil, err
+	}
+	return event.NewSubscription(func(quit <-chan struct{}) error {
+		defer sub.Unsubscribe()
+		for {
+			select {
+			case log := <-logs:
+				// New log arrived, parse the event and forward to the user
+				event := new(StateCommitmentChainStateBatchAppended)
+				if err := _StateCommitmentChain.contract.UnpackLog(event, "StateBatchAppended", log); err != nil {
+					return err
+				}
+				event.Raw = log
+
+				select {
+				case sink <- event:
+				case err := <-sub.Err():
+					return err
+				case <-quit:
+					return nil
+				}
+			case err := <-sub.Err():
+				return err
+			case <-quit:
+				return nil
+			}
+		}
+	}), nil
+}
+
+// ParseStateBatchAppended is a log parse operation binding the contract event 0x16be4c5129a4e03cf3350262e181dc02ddfb4a6008d925368c0899fcd97ca9c5.
+//
+// Solidity: event StateBatchAppended(uint256 indexed _batchIndex, bytes32 _batchRoot, uint256 _batchSize, uint256 _prevTotalElements, bytes _extraData)
+func (_StateCommitmentChain *StateCommitmentChainFilterer) ParseStateBatchAppended(log types.Log) (*StateCommitmentChainStateBatchAppended, error) {
+	event := new(StateCommitmentChainStateBatchAppended)
+	if err := _StateCommitmentChain.contract.UnpackLog(event, "StateBatchAppended", log); err != nil {
+		return nil, err
+	}
+	event.Raw = log
+	return event, nil
+}
+
+// StateCommitmentChainStateBatchDeletedIterator is returned from FilterStateBatchDeleted and is used to iterate over the raw logs and unpacked data for StateBatchDeleted events raised by the StateCommitmentChain contract.
+type StateCommitmentChainStateBatchDeletedIterator struct {
+	Event *StateCommitmentChainStateBatchDeleted // Event containing the contract specifics and raw log
+
+	contract *bind.BoundContract // Generic contract to use for unpacking event data
+	event    string              // Event name to use for unpacking event data
+
+	logs chan types.Log        // Log channel receiving the found contract events
+	sub  ethereum.Subscription // Subscription for errors, completion and termination
+	done bool                  // Whether the subscription completed delivering logs
+	fail error                 // Occurred error to stop iteration
+}
+
+// Next advances the iterator to the subsequent event, returning whether there
+// are any more events found. In case of a retrieval or parsing error, false is
+// returned and Error() can be queried for the exact failure.
+func (it *StateCommitmentChainStateBatchDeletedIterator) Next() bool {
+	// If the iterator failed, stop iterating
+	if it.fail != nil {
+		return false
+	}
+	// If the iterator completed, deliver directly whatever's available
+	if it.done {
+		select {
+		case log := <-it.logs:
+			it.Event = new(StateCommitmentChainStateBatchDeleted)
+			if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+				it.fail = err
+				return false
+			}
+			it.Event.Raw = log
+			return true
+
+		default:
+			return false
+		}
+	}
+	// Iterator still in progress, wait for either a data or an error event
+	select {
+	case log := <-it.logs:
+		it.Event = new(StateCommitmentChainStateBatchDeleted)
+		if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+			it.fail = err
+			return false
+		}
+		it.Event.Raw = log
+		return true
+
+	case err := <-it.sub.Err():
+		it.done = true
+		it.fail = err
+		return it.Next()
+	}
+}
+
+// Error returns any retrieval or parsing error occurred during filtering.
+func (it *StateCommitmentChainStateBatchDeletedIterator) Error() error {
+	return it.fail
+}
+
+// Close terminates the iteration process, releasing any pending underlying
+// resources.
+func (it *StateCommitmentChainStateBatchDeletedIterator) Close() error {
+	it.sub.Unsubscribe()
+	return nil
+}
+
+// StateCommitmentChainStateBatchDeleted represents a StateBatchDeleted event raised by the StateCommitmentChain contract.
+type StateCommitmentChainStateBatchDeleted struct {
+	BatchIndex *big.Int
+	BatchRoot  [32]byte
+	Raw        types.Log // Blockchain specific contextual infos
+}
+
+// FilterStateBatchDeleted is a free log retrieval operation binding the contract event 0x8747b69ce8fdb31c3b9b0a67bd8049ad8c1a69ea417b69b12174068abd9cbd64.
+//
+// Solidity: event StateBatchDeleted(uint256 indexed _batchIndex, bytes32 _batchRoot)
+func (_StateCommitmentChain *StateCommitmentChainFilterer) FilterStateBatchDeleted(opts *bind.FilterOpts, _batchIndex []*big.Int) (*StateCommitmentChainStateBatchDeletedIterator, error) {
+
+	var _batchIndexRule []interface{}
+	for _, _batchIndexItem := range _batchIndex {
+		_batchIndexRule = append(_batchIndexRule, _batchIndexItem)
+	}
+
+	logs, sub, err := _StateCommitmentChain.contract.FilterLogs(opts, "StateBatchDeleted", _batchIndexRule)
+	if err != nil {
+		return nil, err
+	}
+	return &StateCommitmentChainStateBatchDeletedIterator{contract: _StateCommitmentChain.contract, event: "StateBatchDeleted", logs: logs, sub: sub}, nil
+}
+
+// WatchStateBatchDeleted is a free log subscription operation binding the contract event 0x8747b69ce8fdb31c3b9b0a67bd8049ad8c1a69ea417b69b12174068abd9cbd64.
+//
+// Solidity: event StateBatchDeleted(uint256 indexed _batchIndex, bytes32 _batchRoot)
+func (_StateCommitmentChain *StateCommitmentChainFilterer) WatchStateBatchDeleted(opts *bind.WatchOpts, sink chan<- *StateCommitmentChainStateBatchDeleted, _batchIndex []*big.Int) (event.Subscription, error) {
+
+	var _batchIndexRule []interface{}
+	for _, _batchIndexItem := range _batchIndex {
+		_batchIndexRule = append(_batchIndexRule, _batchIndexItem)
+	}
+
+	logs, sub, err := _StateCommitmentChain.contract.WatchLogs(opts, "StateBatchDeleted", _batchIndexRule)
+	if err != nil {
+		return nil, err
+	}
+	return event.NewSubscription(func(quit <-chan struct{}) error {
+		defer sub.Unsubscribe()
+		for {
+			select {
+			case log := <-logs:
+				// New log arrived, parse the event and forward to the user
+				event := new(StateCommitmentChainStateBatchDeleted)
+				if err := _StateCommitmentChain.contract.UnpackLog(event, "StateBatchDeleted", log); err != nil {
+					return err
+				}
+				event.Raw = log
+
+				select {
+				case sink <- event:
+				case err := <-sub.Err():
+					return err
+				case <-quit:
+					return nil
+				}
+			case err := <-sub.Err():
+				return err
+			case <-quit:
+				return nil
+			}
+		}
+	}), nil
+}
+
+// ParseStateBatchDeleted is a log parse operation binding the contract event 0x8747b69ce8fdb31c3b9b0a67bd8049ad8c1a69ea417b69b12174068abd9cbd64.
+//
+// Solidity: event StateBatchDeleted(uint256 indexed _batchIndex, bytes32 _batchRoot)
+func (_StateCommitmentChain *StateCommitmentChainFilterer) ParseStateBatchDeleted(log types.Log) (*StateCommitmentChainStateBatchDeleted, error) {
+	event := new(StateCommitmentChainStateBatchDeleted)
+	if err := _StateCommitmentChain.contract.UnpackLog(event, "StateBatchDeleted", log); err != nil {
+		return nil, err
+	}
+	event.Raw = log
+	return event, nil
+}

go/indexer/cmd/indexer/main.go

+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/ethereum/go-ethereum/log"
+	"github.com/ethereum/go-ethereum/params"
+	"github.com/urfave/cli"
+
+	"github.com/ethereum-optimism/optimism/go/indexer"
+	"github.com/ethereum-optimism/optimism/go/indexer/flags"
+)
+
+var (
+	GitVersion = ""
+	GitCommit  = ""
+	GitDate    = ""
+)
+
+func main() {
+	// Set up logger with a default INFO level in case we fail to parse flags.
+	// Otherwise the final crtiical log won't show what the parsing error was.
+	log.Root().SetHandler(
+		log.LvlFilterHandler(
+			log.LvlInfo,
+			log.StreamHandler(os.Stdout, log.TerminalFormat(true)),
+		),
+	)
+
+	app := cli.NewApp()
+	app.Flags = flags.Flags
+	app.Version = fmt.Sprintf("%s-%s", GitVersion, params.VersionWithCommit(GitCommit, GitDate))
+	app.Name = "indexer"
+	app.Usage = "Indexer Service"
+	app.Description = "Service for indexing deposits and withdrawals " +
+		"by account on L1 and L2"
+
+	app.Action = indexer.Main(GitVersion)
+	err := app.Run(os.Args)
+	if err != nil {
+		log.Crit("Application failed", "message", err)
+	}
+}

go/indexer/config.go

+package indexer
+
+import (
+	"errors"
+	"time"
+
+	"github.com/ethereum/go-ethereum/log"
+	"github.com/urfave/cli"
+
+	"github.com/ethereum-optimism/optimism/go/indexer/flags"
+)
+
+var (
+	// ErrSentryDSNNotSet signals that not Data Source Name was provided
+	// with which to configure Sentry logging.
+	ErrSentryDSNNotSet = errors.New("sentry-dsn must be set if use-sentry " +
+		"is true")
+)
+
+type Config struct {
+	/* Required Params */
+
+	// BuildEnv identifies the environment this binary is intended for, i.e.
+	// production, development, etc.
+	BuildEnv string
+
+	// EthNetworkName identifies the intended Ethereum network.
+	EthNetworkName string
+
+	// ChainID identifies the chain being indexed.
+	ChainID int64
+
+	// L1EthRpc is the HTTP provider URL for L1.
+	L1EthRpc string
+
+	// L2EthRpc is the HTTP provider URL for L1.
+	L2EthRpc string
+
+	// L1AddressManagerAddress is the address of the address manager for L1.
+	L1AddressManagerAddress string
+
+	// L2GenesisBlockHash is the l2 genesis block hash.
+	L2GenesisBlockHash string
+
+	// PollInterval is the delay between querying L2 for more transaction
+	// and creating a new batch.
+	PollInterval time.Duration
+
+	// Hostname of the database connection.
+	DBHost string
+
+	// Port of the database connection.
+	DBPort uint64
+
+	// Username of the database connection.
+	DBUser string
+
+	// Password of the database connection.
+	DBPassword string
+
+	// Database name of the database connection.
+	DBName string
+
+	/* Optional Params */
+
+	// LogLevel is the lowest log level that will be output.
+	LogLevel string
+
+	// LogTerminal if true, prints to stdout in terminal format, otherwise
+	// prints using JSON. If SentryEnable is true this flag is ignored, and logs
+	// are printed using JSON.
+	LogTerminal bool
+
+	// SentryEnable if true, logs any error messages to sentry. SentryDsn
+	// must also be set if SentryEnable is true.
+	SentryEnable bool
+
+	// SentryDsn is the sentry Data Source Name.
+	SentryDsn string
+
+	// SentryTraceRate the frequency with which Sentry should flush buffered
+	// events.
+	SentryTraceRate time.Duration
+
+	// StartBlockNumber is the block number to start indexing from.
+	StartBlockNumber uint64
+
+	// StartBlockHash is the block hash to start indexing from.
+	StartBlockHash string
+
+	// ConfDepth is the number of confirmations after which headers are
+	// considered confirmed.
+	ConfDepth uint64
+
+	// MaxHeaderBatchSize is the maximum number of headers to request as a
+	// batch.
+	MaxHeaderBatchSize uint64
+
+	// MetricsServerEnable if true, will create a metrics client and log to
+	// Prometheus.
+	MetricsServerEnable bool
+
+	// MetricsHostname is the hostname at which the metrics server is running.
+	MetricsHostname string
+
+	// MetricsPort is the port at which the metrics server is running.
+	MetricsPort uint64
+
+	// DisableIndexer enables/disables the indexer.
+	DisableIndexer bool
+}
+
+// NewConfig parses the Config from the provided flags or environment variables.
+// This method fails if ValidateConfig deems the configuration to be malformed.
+func NewConfig(ctx *cli.Context) (Config, error) {
+	cfg := Config{
+		/* Required Flags */
+		BuildEnv:                ctx.GlobalString(flags.BuildEnvFlag.Name),
+		EthNetworkName:          ctx.GlobalString(flags.EthNetworkNameFlag.Name),
+		ChainID:                 ctx.GlobalInt64(flags.ChainIDFlag.Name),
+		L1EthRpc:                ctx.GlobalString(flags.L1EthRpcFlag.Name),
+		L2EthRpc:                ctx.GlobalString(flags.L2EthRpcFlag.Name),
+		L1AddressManagerAddress: ctx.GlobalString(flags.L1AddressManagerAddressFlag.Name),
+		L2GenesisBlockHash:      ctx.GlobalString(flags.L2GenesisBlockHashFlag.Name),
+		DBHost:                  ctx.GlobalString(flags.DBHostFlag.Name),
+		DBPort:                  ctx.GlobalUint64(flags.DBPortFlag.Name),
+		DBUser:                  ctx.GlobalString(flags.DBUserFlag.Name),
+		DBPassword:              ctx.GlobalString(flags.DBPasswordFlag.Name),
+		DBName:                  ctx.GlobalString(flags.DBNameFlag.Name),
+		/* Optional Flags */
+		DisableIndexer:      ctx.GlobalBool(flags.DisableIndexer.Name),
+		LogLevel:            ctx.GlobalString(flags.LogLevelFlag.Name),
+		LogTerminal:         ctx.GlobalBool(flags.LogTerminalFlag.Name),
+		SentryEnable:        ctx.GlobalBool(flags.SentryEnableFlag.Name),
+		SentryDsn:           ctx.GlobalString(flags.SentryDsnFlag.Name),
+		SentryTraceRate:     ctx.GlobalDuration(flags.SentryTraceRateFlag.Name),
+		StartBlockNumber:    ctx.GlobalUint64(flags.StartBlockNumberFlag.Name),
+		StartBlockHash:      ctx.GlobalString(flags.StartBlockHashFlag.Name),
+		ConfDepth:           ctx.GlobalUint64(flags.ConfDepthFlag.Name),
+		MaxHeaderBatchSize:  ctx.GlobalUint64(flags.MaxHeaderBatchSizeFlag.Name),
+		MetricsServerEnable: ctx.GlobalBool(flags.MetricsServerEnableFlag.Name),
+		MetricsHostname:     ctx.GlobalString(flags.MetricsHostnameFlag.Name),
+		MetricsPort:         ctx.GlobalUint64(flags.MetricsPortFlag.Name),
+	}
+
+	err := ValidateConfig(&cfg)
+	if err != nil {
+		return Config{}, err
+	}
+
+	return cfg, nil
+}
+
+// ValidateConfig ensures additional constraints on the parsed configuration to
+// ensure that it is well-formed.
+func ValidateConfig(cfg *Config) error {
+	// Sanity check log level.
+	if cfg.LogLevel == "" {
+		cfg.LogLevel = "debug"
+	}
+
+	_, err := log.LvlFromString(cfg.LogLevel)
+	if err != nil {
+		return err
+	}
+
+	// Ensure the Sentry Data Source Name is set when using Sentry.
+	if cfg.SentryEnable && cfg.SentryDsn == "" {
+		return ErrSentryDSNNotSet
+	}
+
+	return nil
+}

go/indexer/config_test.go

+package indexer_test
+
+import (
+	"fmt"
+	"testing"
+
+	indexer "github.com/ethereum-optimism/optimism/go/indexer"
+	"github.com/stretchr/testify/require"
+)
+
+var validateConfigTests = []struct {
+	name   string
+	cfg    indexer.Config
+	expErr error
+}{
+	{
+		name: "bad log level",
+		cfg: indexer.Config{
+			LogLevel: "unknown",
+		},
+		expErr: fmt.Errorf("unknown level: unknown"),
+	},
+}
+
+// TestValidateConfig asserts the behavior of ValidateConfig by testing expected
+// error and success configurations.
+func TestValidateConfig(t *testing.T) {
+	for _, test := range validateConfigTests {
+		t.Run(test.name, func(t *testing.T) {
+			err := indexer.ValidateConfig(&test.cfg)
+			require.Equal(t, err, test.expErr)
+		})
+	}
+}

go/indexer/contracts/ERC20.sol/ERC20.dbg.json

+{
+  "_format": "hh-sol-dbg-1",
+  "buildInfo": "../../build-info/d8a0f286587dfbd9a9d1e4f1e98e7119.json"
+}

go/indexer/contracts/ERC20.sol/ERC20.json

+{
+  "_format": "hh-sol-artifact-1",
+  "contractName": "ERC20",
+  "sourceName": "contracts/ERC20.sol",
+  "abi": [
+    {
+      "inputs": [
+        {
+          "internalType": "uint256",
+          "name": "_initialAmount",
+          "type": "uint256"
+        },
+        {
+          "internalType": "string",
+          "name": "_tokenName",
+          "type": "string"
+        },
+        {
+          "internalType": "uint8",
+          "name": "_decimalUnits",
+          "type": "uint8"
+        },
+        {
+          "internalType": "string",
+          "name": "_tokenSymbol",
+          "type": "string"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "constructor"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "_owner",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "_spender",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "internalType": "uint256",
+          "name": "_value",
+          "type": "uint256"
+        }
+      ],
+      "name": "Approval",
+      "type": "event"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "_from",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "_to",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "internalType": "uint256",
+          "name": "_value",
+          "type": "uint256"
+        }
+      ],
+      "name": "Transfer",
+      "type": "event"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "_owner",
+          "type": "address"
+        },
+        {
+          "internalType": "address",
+          "name": "_spender",
+          "type": "address"
+        }
+      ],
+      "name": "allowance",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "remaining",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "",
+          "type": "address"
+        },
+        {
+          "internalType": "address",
+          "name": "",
+          "type": "address"
+        }
+      ],
+      "name": "allowed",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "_spender",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "_value",
+          "type": "uint256"
+        }
+      ],
+      "name": "approve",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "success",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "_owner",
+          "type": "address"
+        }
+      ],
+      "name": "balanceOf",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "balance",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "",
+          "type": "address"
+        }
+      ],
+      "name": "balances",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [],
+      "name": "decimals",
+      "outputs": [
+        {
+          "internalType": "uint8",
+          "name": "",
+          "type": "uint8"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [],
+      "name": "destroy",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [],
+      "name": "name",
+      "outputs": [
+        {
+          "internalType": "string",
+          "name": "",
+          "type": "string"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [],
+      "name": "symbol",
+      "outputs": [
+        {
+          "internalType": "string",
+          "name": "",
+          "type": "string"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [],
+      "name": "totalSupply",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "_to",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "_value",
+          "type": "uint256"
+        }
+      ],
+      "name": "transfer",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "success",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "_from",
+          "type": "address"
+        },
+        {
+          "internalType": "address",
+          "name": "_to",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "_value",
+          "type": "uint256"
+        }
+      ],
+      "name": "transferFrom",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "success",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    }
+  ],
+  "bytecode": "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",
+  "deployedBytecode": "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",
+  "linkReferences": {},
+  "deployedLinkReferences": {}
+}

go/indexer/crypto.go

+package indexer
+
+import (
+	"fmt"
+
+	l2common "github.com/ethereum-optimism/optimism/l2geth/common"
+	"github.com/ethereum/go-ethereum/common"
+)
+
+// ParseL1Address parses a L1 ETH addres from a hex string. This method will
+// fail if the address is not a valid hexidecimal address.
+func ParseL1Address(address string) (common.Address, error) {
+	if common.IsHexAddress(address) {
+		return common.HexToAddress(address), nil
+	}
+	return common.Address{}, fmt.Errorf("invalid address: %v", address)
+}
+
+// ParseL2Address parses a L2 ETH addres from a hex string. This method will
+// fail if the address is not a valid hexidecimal address.
+func ParseL2Address(address string) (l2common.Address, error) {
+	if l2common.IsHexAddress(address) {
+		return l2common.HexToAddress(address), nil
+	}
+	return l2common.Address{}, fmt.Errorf("invalid address: %v", address)
+}

go/indexer/crypto_test.go

+package indexer_test
+
+import (
+	"bytes"
+	"errors"
+	"testing"
+
+	indexer "github.com/ethereum-optimism/optimism/go/indexer"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/stretchr/testify/require"
+)
+
+// TestParseAddress asserts that ParseAddress correctly parses 40-characater
+// hexidecimal strings with optional 0x prefix into valid 20-byte addresses.
+func TestParseAddress(t *testing.T) {
+	tests := []struct {
+		name    string
+		addr    string
+		expErr  error
+		expAddr common.Address
+	}{
+		{
+			name:   "empty address",
+			addr:   "",
+			expErr: errors.New("invalid address: "),
+		},
+		{
+			name:   "only 0x",
+			addr:   "0x",
+			expErr: errors.New("invalid address: 0x"),
+		},
+		{
+			name:   "non hex character",
+			addr:   "0xaaaaaazaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
+			expErr: errors.New("invalid address: 0xaaaaaazaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"),
+		},
+		{
+			name:    "valid address",
+			addr:    "0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
+			expErr:  nil,
+			expAddr: common.BytesToAddress(bytes.Repeat([]byte{170}, 20)),
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			addr, err := indexer.ParseAddress(test.addr)
+			require.Equal(t, err, test.expErr)
+			if test.expErr != nil {
+				return
+			}
+			require.Equal(t, addr, test.expAddr)
+		})
+	}
+}

go/indexer/db/db.go

+package db
+
+import (
+	"database/sql"
+	"errors"
+	"math/big"
+
+	"github.com/google/uuid"
+
+	l2common "github.com/ethereum-optimism/optimism/l2geth/common"
+	"github.com/ethereum/go-ethereum/common"
+	_ "github.com/lib/pq"
+)
+
+const createL1BlocksTable = `
+CREATE TABLE IF NOT EXISTS l1_blocks (
+	hash VARCHAR NOT NULL PRIMARY KEY,
+	parent_hash VARCHAR NOT NULL,
+	number INTEGER NOT NULL,
+	timestamp INTEGER NOT NULL
+)
+`
+
+const createL2BlocksTable = `
+CREATE TABLE IF NOT EXISTS l2_blocks (
+	hash VARCHAR NOT NULL PRIMARY KEY,
+	parent_hash VARCHAR NOT NULL,
+	number INTEGER NOT NULL,
+	timestamp INTEGER NOT NULL
+)
+`
+
+const createDepositsTable = `
+CREATE TABLE IF NOT EXISTS deposits (
+	guid VARCHAR PRIMARY KEY NOT NULL,
+	from_address VARCHAR NOT NULL,
+	to_address VARCHAR NOT NULL,
+	l1_token VARCHAR NOT NULL REFERENCES l1_tokens(address),
+	l2_token VARCHAR NOT NULL,
+	amount VARCHAR NOT NULL,
+	data BYTEA NOT NULL,
+	log_index INTEGER NOT NULL,
+	block_hash VARCHAR NOT NULL REFERENCES l1_blocks(hash),
+	tx_hash VARCHAR NOT NULL
+)
+`
+
+const createL1TokensTable = `
+CREATE TABLE IF NOT EXISTS l1_tokens (
+	address VARCHAR NOT NULL PRIMARY KEY,
+	name VARCHAR NOT NULL,
+	symbol VARCHAR NOT NULL,
+	decimals INTEGER NOT NULL
+)
+`
+
+const createL2TokensTable = `
+CREATE TABLE IF NOT EXISTS l2_tokens (
+	address TEXT NOT NULL PRIMARY KEY,
+	name TEXT NOT NULL,
+	symbol TEXT NOT NULL,
+	decimals INTEGER NOT NULL
+)
+`
+
+const createStateBatchesTable = `
+CREATE TABLE IF NOT EXISTS state_batches (
+	index INTEGER NOT NULL PRIMARY KEY,
+	root VARCHAR NOT NULL,
+	size INTEGER NOT NULL,
+	prev_total INTEGER NOT NULL,
+	extra_data BYTEA NOT NULL,
+	block_hash VARCHAR NOT NULL REFERENCES l1_blocks(hash)
+);
+CREATE INDEX IF NOT EXISTS state_batches_block_hash ON state_batches(block_hash);
+CREATE INDEX IF NOT EXISTS state_batches_size ON state_batches(size);
+CREATE INDEX IF NOT EXISTS state_batches_prev_total ON state_batches(prev_total);
+`
+
+const createWithdrawalsTable = `
+CREATE TABLE IF NOT EXISTS withdrawals (
+	guid VARCHAR PRIMARY KEY NOT NULL,
+	from_address VARCHAR NOT NULL,
+	to_address VARCHAR NOT NULL,
+	l1_token VARCHAR NOT NULL,
+	l2_token VARCHAR NOT NULL REFERENCES l2_tokens(address),
+	amount VARCHAR NOT NULL,
+	data BYTEA NOT NULL,
+	log_index INTEGER NOT NULL,
+	block_hash VARCHAR NOT NULL REFERENCES l2_blocks(hash),
+	tx_hash VARCHAR NOT NULL,
+	state_batch INTEGER REFERENCES state_batches(index)
+)
+`
+
+const insertETHL1Token = `
+INSERT INTO l1_tokens
+	(address, name, symbol, decimals)
+VALUES ('0x0000000000000000000000000000000000000000', 'Ethereum', 'ETH', 18)
+ON CONFLICT (address) DO NOTHING;
+`
+
+// earlier transactions used 0x0000000000000000000000000000000000000000 as
+// address of ETH so insert both that and
+// 0xDeadDeAddeAddEAddeadDEaDDEAdDeaDDeAD0000
+const insertETHL2Token = `
+INSERT INTO l2_tokens
+	(address, name, symbol, decimals)
+VALUES ('0xDeadDeAddeAddEAddeadDEaDDEAdDeaDDeAD0000', 'Ethereum', 'ETH', 18)
+ON CONFLICT (address) DO NOTHING;
+INSERT INTO l2_tokens
+	(address, name, symbol, decimals)
+VALUES ('0x0000000000000000000000000000000000000000', 'Ethereum', 'ETH', 18)
+ON CONFLICT (address) DO NOTHING;
+`
+
+const createL1L2NumberIndex = `
+CREATE UNIQUE INDEX IF NOT EXISTS l1_blocks_number ON l1_blocks(number);
+CREATE UNIQUE INDEX IF NOT EXISTS l2_blocks_number ON l2_blocks(number);
+`
+
+type PaginationParam struct {
+	Limit  uint64
+	Offset uint64
+}
+
+var schema = []string{
+	createL1BlocksTable,
+	createL2BlocksTable,
+	createL1TokensTable,
+	createL2TokensTable,
+	createStateBatchesTable,
+	insertETHL1Token,
+	insertETHL2Token,
+	createDepositsTable,
+	createWithdrawalsTable,
+	createL1L2NumberIndex,
+}
+
+type TxnEnqueuedEvent struct {
+	BlockNumber uint64
+	Timestamp   uint64
+	TxHash      common.Hash
+	Data        []byte
+}
+
+func (e TxnEnqueuedEvent) String() string {
+	return e.TxHash.String()
+}
+
+type Deposit struct {
+	GUID        string
+	TxHash      common.Hash
+	L1Token     common.Address
+	L2Token     common.Address
+	FromAddress common.Address
+	ToAddress   common.Address
+	Amount      *big.Int
+	Data        []byte
+	LogIndex    uint
+}
+
+func (d Deposit) String() string {
+	return d.TxHash.String()
+}
+
+type Withdrawal struct {
+	GUID        string
+	TxHash      l2common.Hash
+	L1Token     l2common.Address
+	L2Token     l2common.Address
+	FromAddress l2common.Address
+	ToAddress   l2common.Address
+	Amount      *big.Int
+	Data        []byte
+	LogIndex    uint
+}
+
+func (w Withdrawal) String() string {
+	return w.TxHash.String()
+}
+
+type IndexedL1Block struct {
+	Hash       common.Hash
+	ParentHash common.Hash
+	Number     uint64
+	Timestamp  uint64
+	Deposits   []Deposit
+}
+
+func (b IndexedL1Block) String() string {
+	return b.Hash.String()
+}
+
+type IndexedL2Block struct {
+	Hash        l2common.Hash
+	ParentHash  l2common.Hash
+	Number      uint64
+	Timestamp   uint64
+	Withdrawals []Withdrawal
+}
+
+func (b IndexedL2Block) String() string {
+	return b.Hash.String()
+}
+
+func (b *IndexedL1Block) Events() []TxnEnqueuedEvent {
+	nDeposits := len(b.Deposits)
+	if nDeposits == 0 {
+		return nil
+	}
+
+	var events = make([]TxnEnqueuedEvent, 0, nDeposits)
+	for _, deposit := range b.Deposits {
+		events = append(events, TxnEnqueuedEvent{
+			BlockNumber: b.Number,
+			Timestamp:   b.Timestamp,
+			TxHash:      deposit.TxHash,
+			Data:        deposit.Data, // TODO: copy?
+		})
+	}
+
+	return events
+}
+
+type StateBatch struct {
+	Index     *big.Int
+	Root      common.Hash
+	Size      *big.Int
+	PrevTotal *big.Int
+	ExtraData []byte
+	BlockHash common.Hash
+}
+
+type StateBatchJSON struct {
+	Index          uint64 `json:"index"`
+	Root           string `json:"root"`
+	Size           uint64 `json:"size"`
+	PrevTotal      uint64 `json:"prevTotal"`
+	ExtraData      []byte `json:"extraData"`
+	BlockHash      string `json:"blockHash"`
+	BlockNumber    uint64 `json:"blockNumber"`
+	BlockTimestamp uint64 `json:"blockTimestamp"`
+}
+
+type Token struct {
+	Address  string `json:"address"`
+	Name     string `json:"name"`
+	Symbol   string `json:"symbol"`
+	Decimals uint8  `json:"decimals"`
+}
+
+var ETHL1Token = &Token{
+	Address:  "0x0000000000000000000000000000000000000000",
+	Name:     "Ethereum",
+	Symbol:   "ETH",
+	Decimals: 18,
+}
+
+var ETHL2Address = l2common.HexToAddress("0xDeadDeAddeAddEAddeadDEaDDEAdDeaDDeAD0000")
+
+var ETHL2Token = &Token{
+	Address:  "0xDeadDeAddeAddEAddeadDEaDDEAdDeaDDeAD0000",
+	Name:     "Ethereum",
+	Symbol:   "ETH",
+	Decimals: 18,
+}
+
+type DepositJSON struct {
+	GUID           string `json:"guid"`
+	FromAddress    string `json:"from"`
+	ToAddress      string `json:"to"`
+	L1Token        *Token `json:"l1Token"`
+	L2Token        string `json:"l2Token"`
+	Amount         string `json:"amount"`
+	Data           []byte `json:"data"`
+	LogIndex       uint64 `json:"logIndex"`
+	BlockNumber    uint64 `json:"blockNumber"`
+	BlockTimestamp string `json:"blockTimestamp"`
+	TxHash         string `json:"transactionHash"`
+}
+
+type WithdrawalJSON struct {
+	GUID           string          `json:"guid"`
+	FromAddress    string          `json:"from"`
+	ToAddress      string          `json:"to"`
+	L1Token        string          `json:"l1Token"`
+	L2Token        *Token          `json:"l2Token"`
+	Amount         string          `json:"amount"`
+	Data           []byte          `json:"data"`
+	LogIndex       uint64          `json:"logIndex"`
+	BlockNumber    uint64          `json:"blockNumber"`
+	BlockTimestamp string          `json:"blockTimestamp"`
+	TxHash         string          `json:"transactionHash"`
+	Batch          *StateBatchJSON `json:"batch"`
+}
+
+type Database struct {
+	db     *sql.DB
+	config string
+}
+
+func (d *Database) GetL1TokenByAddress(address string) (*Token, error) {
+	const selectL1TokenStatement = `
+	SELECT name, symbol, decimals FROM l1_tokens WHERE address = $1;
+	`
+
+	var token *Token
+	err := txn(d.db, func(tx *sql.Tx) error {
+		queryStmt, err := tx.Prepare(selectL1TokenStatement)
+		if err != nil {
+			return err
+		}
+
+		rows, err := queryStmt.Query(address)
+		if err != nil {
+			return err
+		}
+
+		if !rows.Next() {
+			return nil
+		}
+
+		var name string
+		var symbol string
+		var decimals uint8
+		err = rows.Scan(&name, &symbol, &decimals)
+		if err != nil {
+			return err
+		}
+
+		if rows.Next() {
+			return errors.New("address should be unique")
+		}
+
+		token = &Token{
+			Name:     name,
+			Symbol:   symbol,
+			Decimals: decimals,
+		}
+
+		return nil
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	return token, nil
+}
+
+func (d *Database) GetL2TokenByAddress(address string) (*Token, error) {
+	const selectL2TokenStatement = `
+	SELECT name, symbol, decimals FROM l2_tokens WHERE address = $1;
+	`
+
+	var token *Token
+	err := txn(d.db, func(tx *sql.Tx) error {
+		queryStmt, err := tx.Prepare(selectL2TokenStatement)
+		if err != nil {
+			return err
+		}
+
+		rows, err := queryStmt.Query(address)
+		if err != nil {
+			return err
+		}
+
+		if !rows.Next() {
+			return nil
+		}
+
+		var name string
+		var symbol string
+		var decimals uint8
+		err = rows.Scan(&name, &symbol, &decimals)
+		if err != nil {
+			return err
+		}
+
+		if rows.Next() {
+			return errors.New("address should be unique")
+		}
+
+		token = &Token{
+			Name:     name,
+			Symbol:   symbol,
+			Decimals: decimals,
+		}
+
+		return nil
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	return token, nil
+}
+
+func (d *Database) AddL1Token(address string, token *Token) error {
+	const insertTokenStatement = `
+	INSERT INTO l1_tokens
+		(address, name, symbol, decimals)
+	VALUES
+		($1, $2, $3, $4)
+	`
+
+	return txn(d.db, func(tx *sql.Tx) error {
+		tokenStmt, err := tx.Prepare(insertTokenStatement)
+		if err != nil {
+			return err
+		}
+
+		_, err = tokenStmt.Exec(
+			address,
+			token.Name,
+			token.Symbol,
+			token.Decimals,
+		)
+		if err != nil {
+			return err
+		}
+
+		return nil
+	})
+}
+
+func (d *Database) AddL2Token(address string, token *Token) error {
+	const insertTokenStatement = `
+	INSERT INTO l2_tokens
+		(address, name, symbol, decimals)
+	VALUES
+		($1, $2, $3, $4)
+	`
+
+	return txn(d.db, func(tx *sql.Tx) error {
+		tokenStmt, err := tx.Prepare(insertTokenStatement)
+		if err != nil {
+			return err
+		}
+
+		_, err = tokenStmt.Exec(
+			address,
+			token.Name,
+			token.Symbol,
+			token.Decimals,
+		)
+		if err != nil {
+			return err
+		}
+
+		return nil
+	})
+}
+
+func (d *Database) AddIndexedL1Block(block *IndexedL1Block) error {
+	const insertBlockStatement = `
+	INSERT INTO l1_blocks
+		(hash, parent_hash, number, timestamp)
+	VALUES
+		($1, $2, $3, $4)
+	`
+
+	const insertDepositStatement = `
+	INSERT INTO deposits
+		(guid, from_address, to_address, l1_token, l2_token, amount, tx_hash, log_index, block_hash, data)
+	VALUES
+		($1, $2, $3, $4, $5, $6, $7, $8, $9, $10)
+	`
+	return txn(d.db, func(tx *sql.Tx) error {
+		blockStmt, err := tx.Prepare(insertBlockStatement)
+		if err != nil {
+			return err
+		}
+
+		_, err = blockStmt.Exec(
+			block.Hash.String(),
+			block.ParentHash.String(),
+			block.Number,
+			block.Timestamp,
+		)
+		if err != nil {
+			return err
+		}
+
+		if len(block.Deposits) == 0 {
+			return nil
+		}
+
+		depositStmt, err := tx.Prepare(insertDepositStatement)
+		if err != nil {
+			return err
+		}
+
+		for _, deposit := range block.Deposits {
+			_, err = depositStmt.Exec(
+				NewGUID(),
+				deposit.FromAddress.String(),
+				deposit.ToAddress.String(),
+				deposit.L1Token.String(),
+				deposit.L2Token.String(),
+				deposit.Amount.String(),
+				deposit.TxHash.String(),
+				deposit.LogIndex,
+				block.Hash.String(),
+				deposit.Data,
+			)
+			if err != nil {
+				return err
+			}
+		}
+
+		return nil
+	})
+}
+
+func (d *Database) AddIndexedL2Block(block *IndexedL2Block) error {
+	const insertBlockStatement = `
+	INSERT INTO l2_blocks
+		(hash, parent_hash, number, timestamp)
+	VALUES
+		($1, $2, $3, $4)
+	`
+
+	const insertWithdrawalStatement = `
+	INSERT INTO withdrawals
+		(guid, from_address, to_address, l1_token, l2_token, amount, tx_hash, log_index, block_hash, data)
+	VALUES
+		($1, $2, $3, $4, $5, $6, $7, $8, $9, $10)
+	`
+	return txn(d.db, func(tx *sql.Tx) error {
+		blockStmt, err := tx.Prepare(insertBlockStatement)
+		if err != nil {
+			return err
+		}
+
+		_, err = blockStmt.Exec(
+			block.Hash.String(),
+			block.ParentHash.String(),
+			block.Number,
+			block.Timestamp,
+		)
+		if err != nil {
+			return err
+		}
+
+		if len(block.Withdrawals) == 0 {
+			return nil
+		}
+
+		withdrawalStmt, err := tx.Prepare(insertWithdrawalStatement)
+		if err != nil {
+			return err
+		}
+
+		for _, withdrawal := range block.Withdrawals {
+			_, err = withdrawalStmt.Exec(
+				NewGUID(),
+				withdrawal.FromAddress.String(),
+				withdrawal.ToAddress.String(),
+				withdrawal.L1Token.String(),
+				withdrawal.L2Token.String(),
+				withdrawal.Amount.String(),
+				withdrawal.TxHash.String(),
+				withdrawal.LogIndex,
+				block.Hash.String(),
+				withdrawal.Data,
+			)
+			if err != nil {
+				return err
+			}
+		}
+
+		return nil
+	})
+}
+
+func (d *Database) AddStateBatch(batches []StateBatch) error {
+	const insertStateBatchStatement = `
+	INSERT INTO state_batches
+		(index, root, size, prev_total, extra_data, block_hash)
+	VALUES
+		($1, $2, $3, $4, $5, $6)
+	`
+
+	return txn(d.db, func(tx *sql.Tx) error {
+		stateBatchStmt, err := tx.Prepare(insertStateBatchStatement)
+		if err != nil {
+			return err
+		}
+
+		for _, sb := range batches {
+			_, err = stateBatchStmt.Exec(
+				sb.Index.Uint64(),
+				sb.Root.String(),
+				sb.Size.Uint64(),
+				sb.PrevTotal.Uint64(),
+				sb.ExtraData,
+				sb.BlockHash.String(),
+			)
+			if err != nil {
+				return err
+			}
+		}
+
+		return nil
+	})
+}
+
+func (d *Database) GetDepositsByAddress(address common.Address, page PaginationParam) ([]DepositJSON, error) {
+	const selectDepositsStatement = `
+	SELECT
+		deposits.guid, deposits.from_address, deposits.to_address,
+		deposits.amount, deposits.tx_hash, deposits.data,
+		deposits.l1_token, deposits.l2_token,
+		l1_tokens.name, l1_tokens.symbol, l1_tokens.decimals,
+		l1_blocks.number, l1_blocks.timestamp
+	FROM deposits
+		INNER JOIN l1_blocks ON deposits.block_hash=l1_blocks.hash
+		INNER JOIN l1_tokens ON deposits.l1_token=l1_tokens.address
+	WHERE deposits.from_address = $1 ORDER BY l1_blocks.timestamp LIMIT $2 OFFSET $3;
+	`
+	var deposits []DepositJSON
+
+	err := txn(d.db, func(tx *sql.Tx) error {
+		queryStmt, err := tx.Prepare(selectDepositsStatement)
+		if err != nil {
+			return err
+		}
+
+		rows, err := queryStmt.Query(address.String(), page.Limit, page.Offset)
+		if err != nil {
+			return err
+		}
+
+		for rows.Next() {
+			var deposit DepositJSON
+			var l1_token Token
+			if err := rows.Scan(
+				&deposit.GUID, &deposit.FromAddress, &deposit.ToAddress,
+				&deposit.Amount, &deposit.TxHash, &deposit.Data,
+				&l1_token.Address, &deposit.L2Token,
+				&l1_token.Name, &l1_token.Symbol, &l1_token.Decimals,
+				&deposit.BlockNumber, &deposit.BlockTimestamp,
+			); err != nil {
+				return err
+			}
+			deposit.L1Token = &l1_token
+			deposits = append(deposits, deposit)
+		}
+
+		return nil
+	})
+
+	if err != nil {
+		return nil, err
+	}
+	return deposits, nil
+}
+
+func (d *Database) GetWithdrawalBatch(hash l2common.Hash) (*StateBatchJSON, error) {
+	const selectWithdrawalBatchStatement = `
+	SELECT
+		state_batches.index, state_batches.root, state_batches.size, state_batches.prev_total, state_batches.extra_data, state_batches.block_hash,
+		l1_blocks.number, l1_blocks.timestamp
+	FROM state_batches
+	INNER JOIN l1_blocks ON state_batches.block_hash = l1_blocks.hash
+	WHERE size + prev_total >= (
+		SELECT
+			number
+		FROM
+		withdrawals
+		INNER JOIN l2_blocks ON withdrawals.block_hash = l2_blocks.hash where tx_hash=$1
+	) ORDER BY "index" LIMIT 1;
+	`
+
+	var batch *StateBatchJSON
+	err := txn(d.db, func(tx *sql.Tx) error {
+		queryStmt, err := tx.Prepare(selectWithdrawalBatchStatement)
+		if err != nil {
+			return err
+		}
+
+		row := queryStmt.QueryRow(hash.String())
+		if row.Err() != nil {
+			return row.Err()
+		}
+
+		var index, size, prev_total, block_number, block_timestamp uint64
+		var root, block_hash string
+		var extra_data []byte
+		err = row.Scan(&index, &root, &size, &prev_total, &extra_data, &block_hash,
+			&block_number, &block_timestamp)
+		if err != nil {
+			if errors.Is(err, sql.ErrNoRows) {
+				batch = nil
+				return nil
+			}
+			return err
+		}
+
+		batch = &StateBatchJSON{
+			Index:          index,
+			Root:           root,
+			Size:           size,
+			PrevTotal:      prev_total,
+			ExtraData:      extra_data,
+			BlockHash:      block_hash,
+			BlockNumber:    block_number,
+			BlockTimestamp: block_timestamp,
+		}
+
+		return nil
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	return batch, nil
+}
+
+func (d *Database) GetWithdrawalsByAddress(address l2common.Address, page PaginationParam) ([]WithdrawalJSON, error) {
+	const selectWithdrawalsStatement = `
+	SELECT
+	    withdrawals.guid, withdrawals.from_address, withdrawals.to_address,
+		withdrawals.amount, withdrawals.tx_hash, withdrawals.data,
+		withdrawals.l1_token, withdrawals.l2_token,
+		l2_tokens.name, l2_tokens.symbol, l2_tokens.decimals,
+		l2_blocks.number, l2_blocks.timestamp
+	FROM withdrawals
+		INNER JOIN l2_blocks ON withdrawals.block_hash=l2_blocks.hash
+		INNER JOIN l2_tokens ON withdrawals.l2_token=l2_tokens.address
+	WHERE withdrawals.from_address = $1 ORDER BY l2_blocks.timestamp LIMIT $2 OFFSET $3;
+	`
+	var withdrawals []WithdrawalJSON
+
+	err := txn(d.db, func(tx *sql.Tx) error {
+		queryStmt, err := tx.Prepare(selectWithdrawalsStatement)
+		if err != nil {
+			return err
+		}
+
+		rows, err := queryStmt.Query(address.String(), page.Limit, page.Offset)
+		if err != nil {
+			return err
+		}
+
+		for rows.Next() {
+			var withdrawal WithdrawalJSON
+			var l2_token Token
+			if err := rows.Scan(
+				&withdrawal.GUID, &withdrawal.FromAddress, &withdrawal.ToAddress,
+				&withdrawal.Amount, &withdrawal.TxHash, &withdrawal.Data,
+				&withdrawal.L1Token, &l2_token.Address,
+				&l2_token.Name, &l2_token.Symbol, &l2_token.Decimals,
+				&withdrawal.BlockNumber, &withdrawal.BlockTimestamp,
+			); err != nil {
+				return err
+			}
+			withdrawal.L2Token = &l2_token
+			withdrawals = append(withdrawals, withdrawal)
+		}
+
+		return nil
+	})
+
+	if err != nil {
+		return nil, err
+	}
+
+	for i := range withdrawals {
+		batch, _ := d.GetWithdrawalBatch(l2common.HexToHash(withdrawals[i].TxHash))
+		withdrawals[i].Batch = batch
+	}
+
+	return withdrawals, nil
+}
+
+type L1BlockLocator struct {
+	Number uint64      `json:"number"`
+	Hash   common.Hash `json:"hash"`
+}
+
+type L2BlockLocator struct {
+	Number uint64        `json:"number"`
+	Hash   l2common.Hash `json:"hash"`
+}
+
+func (d *Database) GetHighestL1Block() (*L1BlockLocator, error) {
+	const selectHighestBlockStatement = `
+	SELECT number, hash FROM l1_blocks ORDER BY number DESC LIMIT 1
+	`
+
+	var highestBlock *L1BlockLocator
+	err := txn(d.db, func(tx *sql.Tx) error {
+		queryStmt, err := tx.Prepare(selectHighestBlockStatement)
+		if err != nil {
+			return err
+		}
+
+		row := queryStmt.QueryRow()
+		if row.Err() != nil {
+			return row.Err()
+		}
+
+		var number uint64
+		var hash string
+		err = row.Scan(&number, &hash)
+		if err != nil {
+			if errors.Is(err, sql.ErrNoRows) {
+				highestBlock = nil
+				return nil
+			}
+			return err
+		}
+
+		highestBlock = &L1BlockLocator{
+			Number: number,
+			Hash:   common.HexToHash(hash),
+		}
+
+		return nil
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	return highestBlock, nil
+}
+
+func (d *Database) GetHighestL2Block() (*L2BlockLocator, error) {
+	const selectHighestBlockStatement = `
+	SELECT number, hash FROM l2_blocks ORDER BY number DESC LIMIT 1
+	`
+
+	var highestBlock *L2BlockLocator
+	err := txn(d.db, func(tx *sql.Tx) error {
+		queryStmt, err := tx.Prepare(selectHighestBlockStatement)
+		if err != nil {
+			return err
+		}
+
+		row := queryStmt.QueryRow()
+		if row.Err() != nil {
+			return row.Err()
+		}
+
+		var number uint64
+		var hash string
+		err = row.Scan(&number, &hash)
+		if err != nil {
+			if errors.Is(err, sql.ErrNoRows) {
+				highestBlock = nil
+				return nil
+			}
+			return err
+		}
+
+		highestBlock = &L2BlockLocator{
+			Number: number,
+			Hash:   l2common.HexToHash(hash),
+		}
+
+		return nil
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	return highestBlock, nil
+}
+
+func (d *Database) GetIndexedL1BlockByHash(hash common.Hash) (*IndexedL1Block, error) {
+	const selectBlockByHashStatement = `
+	SELECT
+		hash, parent_hash, number, timestamp
+	FROM l1_blocks
+	WHERE hash = $1
+	`
+
+	var block *IndexedL1Block
+	err := txn(d.db, func(tx *sql.Tx) error {
+		queryStmt, err := tx.Prepare(selectBlockByHashStatement)
+		if err != nil {
+			return err
+		}
+
+		row := queryStmt.QueryRow(hash.String())
+		if errors.Is(row.Err(), sql.ErrNoRows) {
+			return nil
+		}
+		if row.Err() != nil {
+			return err
+		}
+
+		var hash string
+		var parentHash string
+		var number uint64
+		var timestamp uint64
+		err = row.Scan(&hash, &parentHash, &number, &timestamp)
+		if err != nil {
+			return err
+		}
+
+		block = &IndexedL1Block{
+			Hash:       common.HexToHash(hash),
+			ParentHash: common.HexToHash(parentHash),
+			Number:     number,
+			Timestamp:  timestamp,
+			Deposits:   nil,
+		}
+
+		return nil
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	return block, nil
+
+}
+
+func (d *Database) GetEventsByBlockHash(hash common.Hash) ([]TxnEnqueuedEvent, error) {
+	const selectEventsByBlockHashStatement = `
+	SELECT
+		b.number, b.timestamp,
+		d.tx_hash, d.data
+	FROM
+		blocks AS b,
+		deposits AS d
+	WHERE b.hash = d.block_hash AND b.hash = $1
+	`
+
+	var events []TxnEnqueuedEvent
+	err := txn(d.db, func(tx *sql.Tx) error {
+		queryStmt, err := tx.Prepare(selectEventsByBlockHashStatement)
+		if err != nil {
+			return err
+		}
+
+		rows, err := queryStmt.Query(hash.String())
+		if err != nil {
+			return err
+		}
+
+		for rows.Next() {
+			event, err := scanTxnEnqueuedEvent(rows)
+			if err != nil {
+				return err
+			}
+
+			events = append(events, event)
+		}
+
+		return nil
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	return events, nil
+}
+
+func scanTxnEnqueuedEvent(rows *sql.Rows) (TxnEnqueuedEvent, error) {
+	var number uint64
+	var timestamp uint64
+	var txHash string
+	var data []byte
+	err := rows.Scan(
+		&number,
+		&timestamp,
+		&txHash,
+		&data,
+	)
+	if err != nil {
+		return TxnEnqueuedEvent{}, err
+	}
+
+	return TxnEnqueuedEvent{
+		BlockNumber: number,
+		Timestamp:   timestamp,
+		TxHash:      common.HexToHash(txHash),
+		Data:        data,
+	}, nil
+}
+
+func (d *Database) Close() error {
+	return d.db.Close()
+}
+
+func (d *Database) Config() string {
+	return d.config
+}
+
+func NewDatabase(config string) (*Database, error) {
+	db, err := sql.Open("postgres", config)
+	if err != nil {
+		return nil, err
+	}
+
+	err = db.Ping()
+	if err != nil {
+		return nil, err
+	}
+
+	for _, migration := range schema {
+		_, err = db.Exec(migration)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	return &Database{
+		db:     db,
+		config: config,
+	}, nil
+}
+
+func txn(db *sql.DB, apply func(*sql.Tx) error) error {
+	tx, err := db.Begin()
+	if err != nil {
+		return err
+	}
+	defer func() {
+		if p := recover(); p != nil {
+			tx.Rollback()
+			panic(p)
+		}
+	}()
+
+	err = apply(tx)
+	if err != nil {
+		// Don't swallow application error
+		_ = tx.Rollback()
+		return err
+	}
+
+	return tx.Commit()
+}
+
+func NewGUID() string {
+	return uuid.New().String()
+}

go/indexer/flags/flags.go

+package flags
+
+import (
+	"time"
+
+	"github.com/urfave/cli"
+)
+
+const envVarPrefix = "INDEXER_"
+
+func prefixEnvVar(name string) string {
+	return envVarPrefix + name
+}
+
+var (
+	/* Required Flags */
+
+	BuildEnvFlag = cli.StringFlag{
+		Name: "build-env",
+		Usage: "Build environment for which the binary is produced, " +
+			"e.g. production or development",
+		Required: true,
+		EnvVar:   prefixEnvVar("BUILD_ENV"),
+	}
+	EthNetworkNameFlag = cli.StringFlag{
+		Name:     "eth-network-name",
+		Usage:    "Ethereum network name",
+		Required: true,
+		EnvVar:   prefixEnvVar("ETH_NETWORK_NAME"),
+	}
+	ChainIDFlag = cli.StringFlag{
+		Name: "chain-id",
+		Usage: "Ethereum chain ID",
+		Required: true,
+		EnvVar: prefixEnvVar("CHAIN_ID"),
+	}
+	L1EthRpcFlag = cli.StringFlag{
+		Name:     "l1-eth-rpc",
+		Usage:    "HTTP provider URL for L1",
+		Required: true,
+		EnvVar:   prefixEnvVar("L1_ETH_RPC"),
+	}
+	L2EthRpcFlag = cli.StringFlag{
+		Name:     "l2-eth-rpc",
+		Usage:    "HTTP provider URL for L2",
+		Required: true,
+		EnvVar:   prefixEnvVar("L2_ETH_RPC"),
+	}
+	L1AddressManagerAddressFlag = cli.StringFlag{
+		Name: "l1-address-manager-address",
+		Usage: "Address of the L1 address manager",
+		Required: true,
+		EnvVar: prefixEnvVar("L1_ADDRESS_MANAGER_ADDRESS"),
+	}
+	L2GenesisBlockHashFlag = cli.StringFlag{
+		Name:     "l2-genesis-block-hash",
+		Usage:    "Genesis block hash of the L2 chain",
+		Required: true,
+		EnvVar:   prefixEnvVar("L2_GENESIS_BLOCK_HASH"),
+	}
+	DBHostFlag = cli.StringFlag{
+		Name:     "db-host",
+		Usage:    "Hostname of the database connection",
+		Required: true,
+		EnvVar:   prefixEnvVar("DB_HOST"),
+	}
+	DBPortFlag = cli.Uint64Flag{
+		Name:     "db-port",
+		Usage:    "Port of the database connection",
+		Required: true,
+		EnvVar:   prefixEnvVar("DB_PORT"),
+	}
+	DBUserFlag = cli.StringFlag{
+		Name:     "db-user",
+		Usage:    "Username of the database connection",
+		Required: true,
+		EnvVar:   prefixEnvVar("DB_USER"),
+	}
+	DBPasswordFlag = cli.StringFlag{
+		Name:     "db-password",
+		Usage:    "Password of the database connection",
+		Required: true,
+		EnvVar:   prefixEnvVar("DB_PASSWORD"),
+	}
+	DBNameFlag = cli.StringFlag{
+		Name:     "db-name",
+		Usage:    "Database name of the database connection",
+		Required: true,
+		EnvVar:   prefixEnvVar("DB_NAME"),
+	}
+
+	/* Optional Flags */
+
+	DisableIndexer = cli.BoolFlag{
+		Name:     "disable-indexer",
+		Usage:    "Whether or not to enable the indexer on this instance",
+		Required: false,
+		EnvVar:   prefixEnvVar("DISABLE_INDEXER"),
+	}
+	LogLevelFlag = cli.StringFlag{
+		Name:   "log-level",
+		Usage:  "The lowest log level that will be output",
+		Value:  "info",
+		EnvVar: prefixEnvVar("LOG_LEVEL"),
+	}
+	LogTerminalFlag = cli.BoolFlag{
+		Name: "log-terminal",
+		Usage: "If true, outputs logs in terminal format, otherwise prints " +
+			"in JSON format. If SENTRY_ENABLE is set to true, this flag is " +
+			"ignored and logs are printed using JSON",
+		EnvVar: prefixEnvVar("LOG_TERMINAL"),
+	}
+	SentryEnableFlag = cli.BoolFlag{
+		Name:   "sentry-enable",
+		Usage:  "Whether or not to enable Sentry. If true, sentry-dsn must also be set",
+		EnvVar: prefixEnvVar("SENTRY_ENABLE"),
+	}
+	SentryDsnFlag = cli.StringFlag{
+		Name:   "sentry-dsn",
+		Usage:  "Sentry data source name",
+		EnvVar: prefixEnvVar("SENTRY_DSN"),
+	}
+	SentryTraceRateFlag = cli.DurationFlag{
+		Name:   "sentry-trace-rate",
+		Usage:  "Sentry trace rate",
+		Value:  50 * time.Millisecond,
+		EnvVar: prefixEnvVar("SENTRY_TRACE_RATE"),
+	}
+	StartBlockNumberFlag = cli.Uint64Flag{
+		Name:   "start-block-number",
+		Usage:  "The block number to start indexing from. Must be use together with start block hash",
+		Value:  0,
+		EnvVar: prefixEnvVar("START_BLOCK_NUMBER"),
+	}
+	StartBlockHashFlag = cli.StringFlag{
+		Name:   "start-block-hash",
+		Usage:  "The block hash to start indexing from. Must be use together with start block number",
+		Value:  "0xd4e56740f876aef8c010b86a40d5f56745a118d0906a34e69aec8c0db1cb8fa3",
+		EnvVar: prefixEnvVar("START_BLOCK_HASH"),
+	}
+	ConfDepthFlag = cli.Uint64Flag{
+		Name:   "conf-depth",
+		Usage:  "The number of confirmations after which headers are considered confirmed",
+		Value:  20,
+		EnvVar: prefixEnvVar("CONF_DEPTH"),
+	}
+	MaxHeaderBatchSizeFlag = cli.Uint64Flag{
+		Name:   "max-header-batch-size",
+		Usage:  "The maximum number of headers to request as a batch",
+		Value:  2000,
+		EnvVar: prefixEnvVar("MAX_HEADER_BATCH_SIZE"),
+	}
+	MetricsServerEnableFlag = cli.BoolFlag{
+		Name:   "metrics-server-enable",
+		Usage:  "Whether or not to run the embedded metrics server",
+		EnvVar: prefixEnvVar("METRICS_SERVER_ENABLE"),
+	}
+	MetricsHostnameFlag = cli.StringFlag{
+		Name:   "metrics-hostname",
+		Usage:  "The hostname of the metrics server",
+		Value:  "127.0.0.1",
+		EnvVar: prefixEnvVar("METRICS_HOSTNAME"),
+	}
+	MetricsPortFlag = cli.Uint64Flag{
+		Name:   "metrics-port",
+		Usage:  "The port of the metrics server",
+		Value:  7300,
+		EnvVar: prefixEnvVar("METRICS_PORT"),
+	}
+)
+
+var requiredFlags = []cli.Flag{
+	BuildEnvFlag,
+	EthNetworkNameFlag,
+	ChainIDFlag,
+	L1EthRpcFlag,
+	L2EthRpcFlag,
+	L1AddressManagerAddressFlag,
+	L2GenesisBlockHashFlag,
+	DBHostFlag,
+	DBPortFlag,
+	DBUserFlag,
+	DBPasswordFlag,
+	DBNameFlag,
+}
+
+var optionalFlags = []cli.Flag{
+	DisableIndexer,
+	LogLevelFlag,
+	LogTerminalFlag,
+	SentryEnableFlag,
+	SentryDsnFlag,
+	SentryTraceRateFlag,
+	ConfDepthFlag,
+	MaxHeaderBatchSizeFlag,
+	StartBlockNumberFlag,
+	StartBlockHashFlag,
+	MetricsServerEnableFlag,
+	MetricsHostnameFlag,
+	MetricsPortFlag,
+}
+
+// Flags contains the list of configuration options available to the binary.
+var Flags = append(requiredFlags, optionalFlags...)

go/indexer/flags/flags_test.go

+package flags
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+	"github.com/urfave/cli"
+)
+
+// TestRequiredFlagsSetRequired asserts that all flags deemed required properly
+// have the Required field set to true.
+func TestRequiredFlagsSetRequired(t *testing.T) {
+	for _, flag := range requiredFlags {
+		reqFlag, ok := flag.(cli.RequiredFlag)
+		require.True(t, ok)
+		require.True(t, reqFlag.IsRequired())
+	}
+}
+
+// TestOptionalFlagsDontSetRequired asserts that all flags deemed optional set
+// the Required field to false.
+func TestOptionalFlagsDontSetRequired(t *testing.T) {
+	for _, flag := range optionalFlags {
+		reqFlag, ok := flag.(cli.RequiredFlag)
+		require.True(t, ok)
+		require.False(t, reqFlag.IsRequired())
+	}
+}

go/indexer/go.mod

+module github.com/ethereum-optimism/optimism/go/indexer
+
+go 1.17
+
+require (
+	github.com/ethereum-optimism/optimism/l2geth v0.0.0-20220104205740-f39387287484
+	github.com/ethereum/go-ethereum v1.10.14
+	github.com/getsentry/sentry-go v0.12.0
+	github.com/gorilla/mux v1.8.0
+	github.com/lib/pq v1.0.0
+	github.com/prometheus/client_golang v1.0.0
+	github.com/rs/cors v1.7.0
+	github.com/stretchr/testify v1.7.0
+	github.com/urfave/cli v1.22.5
+)
+
+require (
+	github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6 // indirect
+	github.com/VictoriaMetrics/fastcache v1.6.0 // indirect
+	github.com/aristanetworks/goarista v0.0.0-20170210015632-ea17b1a17847 // indirect
+	github.com/beorn7/perks v1.0.0 // indirect
+	github.com/btcsuite/btcd v0.22.0-beta // indirect
+	github.com/cespare/xxhash/v2 v2.1.1 // indirect
+	github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/deckarep/golang-set v0.0.0-20180603214616-504e848d77ea // indirect
+	github.com/edsrzf/mmap-go v1.0.0 // indirect
+	github.com/elastic/gosigar v0.8.1-0.20180330100440-37f05ff46ffa // indirect
+	github.com/gballet/go-libpcsclite v0.0.0-20190607065134-2772fd86a8ff // indirect
+	github.com/go-ole/go-ole v1.2.1 // indirect
+	github.com/go-stack/stack v1.8.0 // indirect
+	github.com/golang/protobuf v1.4.3 // indirect
+	github.com/golang/snappy v0.0.4 // indirect
+	github.com/google/uuid v1.3.0 // indirect
+	github.com/gorilla/websocket v1.4.2 // indirect
+	github.com/hashicorp/golang-lru v0.5.5-0.20210104140557-80c98217689d // indirect
+	github.com/huin/goupnp v1.0.2 // indirect
+	github.com/jackpal/go-nat-pmp v1.0.2-0.20160603034137-1fa385a6f458 // indirect
+	github.com/karalabe/usb v0.0.0-20211005121534-4c5740d64559 // indirect
+	github.com/mattn/go-runewidth v0.0.9 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
+	github.com/olekukonko/tablewriter v0.0.5 // indirect
+	github.com/pborman/uuid v0.0.0-20170112150404-1b00554d8222 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4 // indirect
+	github.com/prometheus/common v0.6.0 // indirect
+	github.com/prometheus/procfs v0.0.2 // indirect
+	github.com/prometheus/tsdb v0.7.1 // indirect
+	github.com/rjeczalik/notify v0.9.1 // indirect
+	github.com/russross/blackfriday/v2 v2.0.1 // indirect
+	github.com/shirou/gopsutil v3.21.4-0.20210419000835-c7a38de76ee5+incompatible // indirect
+	github.com/shurcooL/sanitized_anchor_name v1.0.0 // indirect
+	github.com/status-im/keycard-go v0.0.0-20190316090335-8537d3370df4 // indirect
+	github.com/steakknife/bloomfilter v0.0.0-20180922174646-6819c0d2a570 // indirect
+	github.com/steakknife/hamming v0.0.0-20180906055917-c99c65617cd3 // indirect
+	github.com/syndtr/goleveldb v1.0.1-0.20210819022825-2ae1ddf74ef7 // indirect
+	github.com/tklauser/go-sysconf v0.3.5 // indirect
+	github.com/tklauser/numcpus v0.2.2 // indirect
+	github.com/tyler-smith/go-bip39 v1.0.1-0.20181017060643-dbb3b84ba2ef // indirect
+	github.com/wsddn/go-ecdh v0.0.0-20161211032359-48726bab9208 // indirect
+	golang.org/x/crypto v0.0.0-20210921155107-089bfa567519 // indirect
+	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c // indirect
+	golang.org/x/sys v0.0.0-20211007075335-d3039528d8ac // indirect
+	golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1 // indirect
+	golang.org/x/text v0.3.7 // indirect
+	google.golang.org/protobuf v1.23.0 // indirect
+	gopkg.in/natefinch/npipe.v2 v2.0.0-20160621034901-c1b8fa8bdcce // indirect
+	gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c // indirect
+)

go/indexer/go.sum

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go/indexer/indexer.go

+package indexer
+
+import (
+	"context"
+	"fmt"
+	"math/big"
+	"net/http"
+	"os"
+	"time"
+
+	"github.com/ethereum-optimism/optimism/go/indexer/metrics"
+	"github.com/ethereum-optimism/optimism/go/indexer/server"
+	"github.com/rs/cors"
+
+	database "github.com/ethereum-optimism/optimism/go/indexer/db"
+	"github.com/ethereum-optimism/optimism/go/indexer/services/l1"
+	"github.com/ethereum-optimism/optimism/go/indexer/services/l2"
+	l2ethclient "github.com/ethereum-optimism/optimism/l2geth/ethclient"
+	"github.com/ethereum/go-ethereum/ethclient"
+	"github.com/ethereum/go-ethereum/log"
+	"github.com/ethereum/go-ethereum/rpc"
+	"github.com/getsentry/sentry-go"
+	"github.com/gorilla/mux"
+	"github.com/urfave/cli"
+)
+
+const (
+	// defaultDialTimeout is default duration the service will wait on
+	// startup to make a connection to either the L1 or L2 backends.
+	defaultDialTimeout = 5 * time.Second
+)
+
+// Main is the entrypoint into the indexer service. This method returns
+// a closure that executes the service and blocks until the service exits. The
+// use of a closure allows the parameters bound to the top-level main package,
+// e.g. GitVersion, to be captured and used once the function is executed.
+func Main(gitVersion string) func(ctx *cli.Context) error {
+	return func(ctx *cli.Context) error {
+		cfg, err := NewConfig(ctx)
+		if err != nil {
+			return err
+		}
+
+		// The call to defer is done here so that any errors logged from
+		// this point on are posted to Sentry before exiting.
+		if cfg.SentryEnable {
+			defer sentry.Flush(2 * time.Second)
+		}
+
+		log.Info("Initializing indexer")
+
+		indexer, err := NewIndexer(cfg, gitVersion)
+		if err != nil {
+			log.Error("Unable to create indexer", "error", err)
+			return err
+		}
+
+		log.Info("Starting indexer")
+
+		if err := indexer.Start(); err != nil {
+			return err
+		}
+		defer indexer.Stop()
+
+		log.Info("Indexer started")
+
+		<-(chan struct{})(nil)
+
+		return nil
+	}
+}
+
+// Indexer is a service that configures the necessary resources for
+// running the Sync and BlockHandler sub-services.
+type Indexer struct {
+	ctx      context.Context
+	cfg      Config
+	l1Client *ethclient.Client
+	l2Client *l2ethclient.Client
+
+	l1IndexingService *l1.Service
+	l2IndexingService *l2.Service
+
+	router *mux.Router
+}
+
+// NewIndexer initializes the Indexer, gathering any resources
+// that will be needed by the TxIndexer and StateIndexer
+// sub-services.
+func NewIndexer(cfg Config, gitVersion string) (*Indexer, error) {
+	ctx := context.Background()
+
+	// Set up our logging. If Sentry is enabled, we will use our custom
+	// log handler that logs to stdout and forwards any error messages to
+	// Sentry for collection. Otherwise, logs will only be posted to stdout.
+	var logHandler log.Handler
+	if cfg.SentryEnable {
+		err := sentry.Init(sentry.ClientOptions{
+			Dsn:              cfg.SentryDsn,
+			Environment:      cfg.EthNetworkName,
+			Release:          "indexer@" + gitVersion,
+			TracesSampleRate: traceRateToFloat64(cfg.SentryTraceRate),
+			Debug:            false,
+		})
+		if err != nil {
+			return nil, err
+		}
+
+		logHandler = SentryStreamHandler(os.Stdout, log.JSONFormat())
+	} else if cfg.LogTerminal {
+		logHandler = log.StreamHandler(os.Stdout, log.TerminalFormat(true))
+	} else {
+		logHandler = log.StreamHandler(os.Stdout, log.JSONFormat())
+	}
+
+	logLevel, err := log.LvlFromString(cfg.LogLevel)
+	if err != nil {
+		return nil, err
+	}
+
+	log.Root().SetHandler(log.LvlFilterHandler(logLevel, logHandler))
+
+	// Connect to L1 and L2 providers. Perform these last since they are the
+	// most expensive.
+	l1Client, rawl1Client, err := dialL1EthClientWithTimeout(ctx, cfg.L1EthRpc)
+	if err != nil {
+		return nil, err
+	}
+
+	l2Client, err := dialL2EthClientWithTimeout(ctx, cfg.L2EthRpc)
+	if err != nil {
+		return nil, err
+	}
+
+	m := metrics.NewMetrics(nil)
+
+	if cfg.MetricsServerEnable {
+		go func() {
+			_, err := m.Serve(cfg.MetricsHostname, cfg.MetricsPort)
+			if err != nil {
+				log.Error("metrics server failed to start", "err", err)
+			}
+		}()
+		log.Info("metrics server enabled", "host", cfg.MetricsHostname, "port", cfg.MetricsPort)
+	}
+
+	dsn := fmt.Sprintf("host=%s port=%d user=%s dbname=%s sslmode=disable",
+		cfg.DBHost, cfg.DBPort, cfg.DBUser, cfg.DBName)
+	if cfg.DBPassword != "" {
+		dsn += fmt.Sprintf(" password=%s", cfg.DBPassword)
+	}
+	db, err := database.NewDatabase(dsn)
+	if err != nil {
+		return nil, err
+	}
+
+	l1AddressManagerAddress, err := ParseL1Address(cfg.L1AddressManagerAddress)
+	if err != nil {
+		return nil, err
+	}
+
+	l1IndexingService, err := l1.NewService(l1.ServiceConfig{
+		Context:               ctx,
+		Metrics:               m,
+		L1Client:              l1Client,
+		RawL1Client:           rawl1Client,
+		ChainID:               big.NewInt(cfg.ChainID),
+		AddressManagerAddress: l1AddressManagerAddress,
+		DB:                    db,
+		ConfDepth:             cfg.ConfDepth,
+		MaxHeaderBatchSize:    cfg.MaxHeaderBatchSize,
+		StartBlockNumber:      cfg.StartBlockNumber,
+		StartBlockHash:        cfg.StartBlockHash,
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	l2IndexingService, err := l2.NewService(l2.ServiceConfig{
+		Context:            ctx,
+		Metrics:            m,
+		L2Client:           l2Client,
+		DB:                 db,
+		ConfDepth:          cfg.ConfDepth,
+		MaxHeaderBatchSize: cfg.MaxHeaderBatchSize,
+		StartBlockNumber:   uint64(0),
+		StartBlockHash:     cfg.L2GenesisBlockHash,
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	return &Indexer{
+		ctx:               ctx,
+		cfg:               cfg,
+		l1Client:          l1Client,
+		l2Client:          l2Client,
+		l1IndexingService: l1IndexingService,
+		l2IndexingService: l2IndexingService,
+		router:            mux.NewRouter(),
+	}, nil
+}
+
+func (b *Indexer) Serve(ctx context.Context) {
+	c := cors.New(cors.Options{
+		AllowedOrigins: []string{"*"},
+	})
+
+	b.router.HandleFunc("/v1/l1/status", b.l1IndexingService.GetIndexerStatus).Methods("GET")
+	b.router.HandleFunc("/v1/l2/status", b.l2IndexingService.GetIndexerStatus).Methods("GET")
+	b.router.HandleFunc("/v1/deposits/0x{address:[a-fA-F0-9]{40}}", b.l1IndexingService.GetDeposits).Methods("GET")
+	b.router.HandleFunc("/v1/withdrawal/0x{hash:[a-fA-F0-9]{64}}", b.l2IndexingService.GetWithdrawalBatch).Methods("GET")
+	b.router.HandleFunc("/v1/withdrawals/0x{address:[a-fA-F0-9]{40}}", b.l2IndexingService.GetWithdrawals).Methods("GET")
+	b.router.HandleFunc("/healthz", func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(200)
+		w.Write([]byte("OK"))
+	})
+
+	middleware := server.LoggingMiddleware(log.New("service", "server"))
+	http.ListenAndServe(":8080", middleware(c.Handler(b.router)))
+}
+
+func (b *Indexer) Start() error {
+	if b.cfg.DisableIndexer {
+		log.Info("indexer disabled, only serving data")
+	} else {
+		b.l1IndexingService.Start()
+		b.l2IndexingService.Start()
+	}
+
+	b.Serve(b.ctx)
+	return nil
+}
+
+func (b *Indexer) Stop() {
+	if !b.cfg.DisableIndexer {
+		b.l1IndexingService.Stop()
+		b.l2IndexingService.Stop()
+	}
+}
+
+// dialL1EthClientWithTimeout attempts to dial the L1 provider using the
+// provided URL. If the dial doesn't complete within defaultDialTimeout seconds,
+// this method will return an error.
+func dialL1EthClientWithTimeout(ctx context.Context, url string) (
+	*ethclient.Client, *rpc.Client, error) {
+
+	ctxt, cancel := context.WithTimeout(ctx, defaultDialTimeout)
+	defer cancel()
+
+	c, err := rpc.DialContext(ctxt, url)
+	if err != nil {
+		return nil, nil, err
+	}
+	return ethclient.NewClient(c), c, nil
+}
+
+// dialL2EthClientWithTimeout attempts to dial the L2 provider using the
+// provided URL. If the dial doesn't complete within defaultDialTimeout seconds,
+// this method will return an error.
+func dialL2EthClientWithTimeout(ctx context.Context, url string) (
+	*l2ethclient.Client, error) {
+
+	ctxt, cancel := context.WithTimeout(ctx, defaultDialTimeout)
+	defer cancel()
+
+	return l2ethclient.DialContext(ctxt, url)
+}
+
+// traceRateToFloat64 converts a time.Duration into a valid float64 for the
+// Sentry client. The client only accepts values between 0.0 and 1.0, so this
+// method clamps anything greater than 1 second to 1.0.
+func traceRateToFloat64(rate time.Duration) float64 {
+	rate64 := float64(rate) / float64(time.Second)
+	if rate64 > 1.0 {
+		rate64 = 1.0
+	}
+	return rate64
+}
+
+func gasPriceFromGwei(gasPriceInGwei uint64) *big.Int {
+	return new(big.Int).SetUint64(gasPriceInGwei * 1e9)
+}

go/indexer/metrics/metrics.go

+package metrics
+
+import (
+	"fmt"
+	l2common "github.com/ethereum-optimism/optimism/l2geth/common"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promauto"
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+	"net/http"
+)
+
+const metricsNamespace = "indexer"
+
+type Metrics struct {
+	SyncHeight *prometheus.GaugeVec
+
+	DepositsCount *prometheus.CounterVec
+
+	WithdrawalsCount *prometheus.CounterVec
+
+	StateBatchesCount prometheus.Counter
+
+	L1CatchingUp prometheus.Gauge
+
+	L2CatchingUp prometheus.Gauge
+
+	SyncPercent *prometheus.GaugeVec
+
+	UpdateDuration *prometheus.SummaryVec
+
+	CachedTokensCount *prometheus.CounterVec
+
+	tokenAddrs map[string]string
+}
+
+func NewMetrics(monitoredTokens map[string]string) *Metrics {
+	mts := make(map[string]string)
+	mts["0x0000000000000000000000000000000000000000"] = "ETH"
+	for addr, symbol := range monitoredTokens {
+		mts[addr] = symbol
+	}
+
+	return &Metrics{
+		SyncHeight: promauto.NewGaugeVec(prometheus.GaugeOpts{
+			Name:      "l1_sync_height",
+			Help:      "The max height of the indexer's last batch of L1 blocks.",
+			Namespace: metricsNamespace,
+		}, []string{
+			"chain",
+		}),
+
+		DepositsCount: promauto.NewCounterVec(prometheus.CounterOpts{
+			Name:      "deposits_count",
+			Help:      "The number of deposits indexed.",
+			Namespace: metricsNamespace,
+		}, []string{
+			"symbol",
+		}),
+
+		WithdrawalsCount: promauto.NewCounterVec(prometheus.CounterOpts{
+			Name:      "withdrawals_count",
+			Help:      "The number of withdrawals indexed.",
+			Namespace: metricsNamespace,
+		}, []string{
+			"symbol",
+		}),
+
+		StateBatchesCount: prometheus.NewCounter(prometheus.CounterOpts{
+			Name:      "state_batches_count",
+			Help:      "The number of state batches indexed.",
+			Namespace: metricsNamespace,
+		}),
+
+		L1CatchingUp: promauto.NewGauge(prometheus.GaugeOpts{
+			Name:      "l1_catching_up",
+			Help:      "Whether or not L1 is far behind the chain tip.",
+			Namespace: metricsNamespace,
+		}),
+
+		L2CatchingUp: promauto.NewGauge(prometheus.GaugeOpts{
+			Name:      "l2_catching_up",
+			Help:      "Whether or not L2 is far behind the chain tip.",
+			Namespace: metricsNamespace,
+		}),
+
+		SyncPercent: promauto.NewGaugeVec(prometheus.GaugeOpts{
+			Name:      "sync_percent",
+			Help:      "Sync percentage for each chain.",
+			Namespace: metricsNamespace,
+		}, []string{
+			"chain",
+		}),
+
+		UpdateDuration: promauto.NewSummaryVec(prometheus.SummaryOpts{
+			Name:       "update_duration_seconds",
+			Help:       "How long each update took.",
+			Namespace:  metricsNamespace,
+			Objectives: map[float64]float64{0.5: 0.05, 0.9: 0.01, 0.95: 0.005, 0.99: 0.001},
+		}, []string{
+			"chain",
+		}),
+
+		CachedTokensCount: prometheus.NewCounterVec(prometheus.CounterOpts{
+			Name:      "cached_tokens_count",
+			Help:      "How many tokens are in the cache",
+			Namespace: metricsNamespace,
+		}, []string{
+			"chain",
+		}),
+
+		tokenAddrs: mts,
+	}
+}
+
+func (m *Metrics) SetL1SyncHeight(height uint64) {
+	m.SyncHeight.WithLabelValues("l1").Set(float64(height))
+}
+
+func (m *Metrics) SetL2SyncHeight(height uint64) {
+	m.SyncHeight.WithLabelValues("l1").Set(float64(height))
+}
+
+func (m *Metrics) RecordDeposit(addr common.Address) {
+	sym := m.tokenAddrs[addr.String()]
+	if sym == "" {
+		sym = "UNKNOWN"
+	}
+
+	m.DepositsCount.WithLabelValues(sym).Inc()
+}
+
+func (m *Metrics) RecordWithdrawal(addr l2common.Address) {
+	sym := m.tokenAddrs[addr.String()]
+	if sym == "" {
+		sym = "UNKNOWN"
+	}
+
+	m.WithdrawalsCount.WithLabelValues(sym).Inc()
+}
+
+func (m *Metrics) RecordStateBatches(count int) {
+	m.StateBatchesCount.Add(float64(count))
+}
+
+func (m *Metrics) SetL1CatchingUp(state bool) {
+	var catchingUp float64
+	if state {
+		catchingUp = 1
+	}
+	m.L1CatchingUp.Set(catchingUp)
+}
+
+func (m *Metrics) SetL2CatchingUp(state bool) {
+	var catchingUp float64
+	if state {
+		catchingUp = 1
+	}
+	m.L2CatchingUp.Set(catchingUp)
+}
+
+func (m *Metrics) SetL1SyncPercent(height uint64, head uint64) {
+	m.SyncPercent.WithLabelValues("l1").Set(float64(height) / float64(head))
+}
+
+func (m *Metrics) SetL2SyncPercent(height uint64, head uint64) {
+	m.SyncPercent.WithLabelValues("l2").Set(float64(height) / float64(head))
+}
+
+func (m *Metrics) IncL1CachedTokensCount() {
+	m.CachedTokensCount.WithLabelValues("l1").Inc()
+}
+
+func (m *Metrics) IncL2CachedTokensCount() {
+	m.CachedTokensCount.WithLabelValues("l2").Inc()
+}
+
+func (m *Metrics) Serve(hostname string, port uint64) (*http.Server, error) {
+	mux := http.NewServeMux()
+	mux.Handle("/metrics", promhttp.Handler())
+	srv := new(http.Server)
+	srv.Addr = fmt.Sprintf("%s:%d", hostname, port)
+	srv.Handler = mux
+	err := srv.ListenAndServe()
+	return srv, err
+}

go/indexer/package.json

+{
+  "name": "indexer",
+  "version": "0.0.1",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "MIT"
+}

go/indexer/sentry_log.go

+package indexer
+
+import (
+	"errors"
+	"io"
+
+	"github.com/ethereum/go-ethereum/log"
+	"github.com/getsentry/sentry-go"
+)
+
+var jsonFmt = log.JSONFormat()
+
+// SentryStreamHandler creates a log.Handler that behaves similarly to
+// log.StreamHandler, however it writes any log with severity greater than or
+// equal to log.LvlError to Sentry. In that case, the passed log.Record is
+// encoded using JSON rather than the default terminal output, so that it can be
+// captured for debugging in the Sentry dashboard.
+func SentryStreamHandler(wr io.Writer, fmtr log.Format) log.Handler {
+	h := log.FuncHandler(func(r *log.Record) error {
+		_, err := wr.Write(fmtr.Format(r))
+		// If this record's severity is log.LvlError or higher,
+		// serialize the record using JSON and write it to Sentry. We
+		// also capture the error message separately so that it's easy
+		// to parse what the error is in the dashboard.
+		//
+		// NOTE: The log.Lvl* constants are defined in reverse order of
+		// their severity, i.e. zero (log.LvlCrit) is the highest
+		// severity.
+		if r.Lvl <= log.LvlError {
+			sentry.WithScope(func(scope *sentry.Scope) {
+				scope.SetExtra("context", jsonFmt.Format(r))
+				sentry.CaptureException(errors.New(r.Msg))
+			})
+		}
+		return err
+	})
+	return log.LazyHandler(log.SyncHandler(h))
+}

go/indexer/server/server.go

+package server
+
+import (
+	"encoding/json"
+	"github.com/ethereum/go-ethereum/log"
+	"net/http"
+	"runtime/debug"
+	"time"
+)
+
+func RespondWithError(w http.ResponseWriter, code int, message string) {
+	RespondWithJSON(w, code, map[string]string{"error": message})
+}
+
+func RespondWithJSON(w http.ResponseWriter, code int, payload interface{}) {
+	response, _ := json.Marshal(payload)
+
+	w.WriteHeader(code)
+	w.Header().Set("Content-Type", "application/json")
+	w.Write(response)
+}
+
+// responseWriter is a minimal wrapper for http.ResponseWriter that allows the
+// written HTTP status code to be captured for logging.
+type responseWriter struct {
+	http.ResponseWriter
+	status      int
+	wroteHeader bool
+}
+
+func wrapResponseWriter(w http.ResponseWriter) *responseWriter {
+	return &responseWriter{ResponseWriter: w}
+}
+
+func (rw *responseWriter) Status() int {
+	return rw.status
+}
+
+func (rw *responseWriter) WriteHeader(code int) {
+	if rw.wroteHeader {
+		return
+	}
+
+	rw.status = code
+	rw.ResponseWriter.WriteHeader(code)
+	rw.wroteHeader = true
+
+	return
+}
+
+// LoggingMiddleware logs the incoming HTTP request & its duration.
+func LoggingMiddleware(logger log.Logger) func(http.Handler) http.Handler {
+	return func(next http.Handler) http.Handler {
+		fn := func(w http.ResponseWriter, r *http.Request) {
+			defer func() {
+				if err := recover(); err != nil {
+					w.WriteHeader(http.StatusInternalServerError)
+					logger.Error(
+						"server panicked",
+						"err", err,
+						"trace", debug.Stack(),
+					)
+				}
+			}()
+
+			start := time.Now()
+			wrapped := wrapResponseWriter(w)
+			next.ServeHTTP(wrapped, r)
+			logger.Info(
+				"served request",
+				"status", wrapped.status,
+				"method", r.Method,
+				"path", r.URL.EscapedPath(),
+				"duration", time.Since(start),
+			)
+		}
+
+		return http.HandlerFunc(fn)
+	}
+}

go/indexer/services/l1/bridge/addresses.go

+package bridge
+
+import (
+	"fmt"
+	"github.com/ethereum-optimism/optimism/go/indexer/bindings/address_manager"
+	"github.com/ethereum/go-ethereum/accounts/abi/bind"
+	"github.com/ethereum/go-ethereum/common"
+)
+
+var zeroAddr common.Address
+
+var standardContracts = []string{
+	"Proxy__OVM_L1CrossDomainMessenger",
+	"Proxy__OVM_L1StandardBridge",
+	"StateCommitmentChain",
+	"CanonicalTransactionChain",
+	"BondManager",
+}
+
+type Addresses struct {
+	addrs map[string]common.Address
+}
+
+func NewAddresses(client bind.ContractBackend, addrMgrAddr common.Address) (*Addresses, error) {
+	ret := &Addresses{
+		addrs: make(map[string]common.Address),
+	}
+	ret.addrs["AddressManager"] = addrMgrAddr
+
+	mgr, err := address_manager.NewAddressManager(addrMgrAddr, client)
+	if err != nil {
+		return nil, err
+	}
+
+	for _, contractName := range standardContracts {
+		contractAddr, err := mgr.GetAddress(nil, contractName)
+		if err != nil {
+			return nil, fmt.Errorf("error getting contract %s: %v", contractName, err)
+		}
+		if contractAddr == zeroAddr {
+			return nil, fmt.Errorf("contract %s is not deployed", contractName)
+		}
+		ret.addrs[contractName] = contractAddr
+	}
+
+	return ret, nil
+}
+
+func (a *Addresses) AddressManager() common.Address {
+	return a.addrs["AddressManager"]
+}
+
+func (a *Addresses) L1CrossDomainMessenger() common.Address {
+	return a.addrs["Proxy__OVM_L1CrossDomainMessenger"]
+}
+
+func (a *Addresses) L1StandardBridge() common.Address {
+	return a.addrs["Proxy__OVM_L1StandardBridge"]
+}
+
+func (a *Addresses) StateCommitmentChain() common.Address {
+	return a.addrs["StateCommitmentChain"]
+}
+
+func (a *Addresses) CanonicalTransactionChain() common.Address {
+	return a.addrs["CanonicalTransactionChain"]
+}
+
+func (a *Addresses) BondManager() common.Address {
+	return a.addrs["BondManager"]
+}

go/indexer/services/l1/bridge/bridge.go

+package bridge
+
+import (
+	"context"
+	"errors"
+	"math/big"
+
+	"github.com/ethereum-optimism/optimism/go/indexer/bindings/l1bridge"
+	"github.com/ethereum-optimism/optimism/go/indexer/bindings/scc"
+	"github.com/ethereum-optimism/optimism/go/indexer/db"
+	"github.com/ethereum/go-ethereum/accounts/abi/bind"
+	"github.com/ethereum/go-ethereum/common"
+)
+
+type DepositsMap map[common.Hash][]db.Deposit
+
+type Bridge interface {
+	Address() common.Address
+	GetDepositsByBlockRange(uint64, uint64) (DepositsMap, error)
+	String() string
+}
+
+type implConfig struct {
+	name string
+	impl string
+	addr common.Address
+}
+
+var customBridgeCfgs = map[uint64][]*implConfig{
+	// Mainnet
+	1: {
+		{"BitBTC", "StandardBridge", common.HexToAddress("0xaBA2c5F108F7E820C049D5Af70B16ac266c8f128")},
+		{"DAI", "StandardBridge", common.HexToAddress("0x10E6593CDda8c58a1d0f14C5164B376352a55f2F")},
+	},
+	// Kovan
+	42: {
+		{"BitBTC", "StandardBridge", common.HexToAddress("0x0b651A42F32069d62d5ECf4f2a7e5Bd3E9438746")},
+		{"USX", "StandardBridge", common.HexToAddress("0x40E862341b2416345F02c41Ac70df08525150dC7")},
+		{"DAI", "StandardBridge", common.HexToAddress("0xb415e822C4983ecD6B1c1596e8a5f976cf6CD9e3")},
+	},
+}
+
+func BridgesByChainID(chainID *big.Int, client bind.ContractBackend, addrs *Addresses, ctx context.Context) (map[string]Bridge, error) {
+	allCfgs := []*implConfig{
+		{"Standard", "StandardBridge", addrs.L1StandardBridge()},
+		{"ETH", "ETHBridge", addrs.L1StandardBridge()},
+	}
+	allCfgs = append(allCfgs, customBridgeCfgs[chainID.Uint64()]...)
+
+	bridges := make(map[string]Bridge)
+	for _, bridge := range allCfgs {
+		switch bridge.impl {
+		case "StandardBridge":
+			l1StandardBridgeFilter, err := l1bridge.NewL1StandardBridgeFilterer(bridge.addr, client)
+			if err != nil {
+				return nil, err
+			}
+
+			standardBridge := &StandardBridge{
+				name:     bridge.name,
+				ctx:      ctx,
+				address:  bridge.addr,
+				client:   client,
+				filterer: l1StandardBridgeFilter,
+			}
+			bridges[bridge.name] = standardBridge
+		case "ETHBridge":
+			l1EthBridgeFilter, err := l1bridge.NewL1StandardBridgeFilterer(bridge.addr, client)
+			if err != nil {
+				return nil, err
+			}
+
+			ethBridge := &EthBridge{
+				name:     bridge.name,
+				ctx:      ctx,
+				address:  bridge.addr,
+				client:   client,
+				filterer: l1EthBridgeFilter,
+			}
+			bridges[bridge.name] = ethBridge
+		default:
+			return nil, errors.New("unsupported bridge")
+		}
+	}
+	return bridges, nil
+}
+
+func StateCommitmentChainScanner(client bind.ContractFilterer, addrs *Addresses) (*scc.StateCommitmentChainFilterer, error) {
+	filter, err := scc.NewStateCommitmentChainFilterer(addrs.StateCommitmentChain(), client)
+	if err != nil {
+		return nil, err
+	}
+	return filter, nil
+}

go/indexer/services/l1/bridge/const.go

+package bridge
+
+import "time"
+
+const (
+	DefaultConnectionTimeout = 60 * time.Second
+)

go/indexer/services/l1/bridge/eth_bridge.go

+package bridge
+
+import (
+	"context"
+	"github.com/ethereum-optimism/optimism/go/indexer/bindings/l1bridge"
+	"github.com/ethereum-optimism/optimism/go/indexer/db"
+	"github.com/ethereum/go-ethereum/accounts/abi/bind"
+	"github.com/ethereum/go-ethereum/common"
+)
+
+type EthBridge struct {
+	name     string
+	ctx      context.Context
+	address  common.Address
+	client   bind.ContractFilterer
+	filterer *l1bridge.L1StandardBridgeFilterer
+}
+
+func (e *EthBridge) Address() common.Address {
+	return e.address
+}
+
+func (e *EthBridge) GetDepositsByBlockRange(start, end uint64) (DepositsMap, error) {
+	depositsByBlockhash := make(DepositsMap)
+
+	iter, err := FilterETHDepositInitiatedWithRetry(e.filterer, &bind.FilterOpts{
+		Start:   start,
+		End:     &end,
+		Context: e.ctx,
+	})
+	if err != nil {
+		logger.Error("Error fetching filter", "err", err)
+	}
+
+	for iter.Next() {
+		depositsByBlockhash[iter.Event.Raw.BlockHash] = append(
+			depositsByBlockhash[iter.Event.Raw.BlockHash], db.Deposit{
+				TxHash:      iter.Event.Raw.TxHash,
+				FromAddress: iter.Event.From,
+				ToAddress:   iter.Event.To,
+				Amount:      iter.Event.Amount,
+				Data:        iter.Event.Data,
+				LogIndex:    iter.Event.Raw.Index,
+			})
+	}
+	if err := iter.Error(); err != nil {
+		return nil, err
+	}
+
+	return depositsByBlockhash, nil
+}
+
+func (e *EthBridge) String() string {
+	return e.name
+}

go/indexer/services/l1/bridge/filter.go

+package bridge
+
+import (
+	"context"
+	"time"
+
+	"github.com/ethereum-optimism/optimism/go/indexer/bindings/l1bridge"
+	"github.com/ethereum-optimism/optimism/go/indexer/bindings/scc"
+	"github.com/ethereum/go-ethereum/accounts/abi/bind"
+)
+
+// clientRetryInterval is the interval to wait between retrying client API
+// calls.
+var clientRetryInterval = 5 * time.Second
+
+// FilterStateBatchAppendedWithRetry retries the given func until it succeeds,
+// waiting for clientRetryInterval duration after every call.
+func FilterStateBatchAppendedWithRetry(filterer *scc.StateCommitmentChainFilterer, opts *bind.FilterOpts) (*scc.StateCommitmentChainStateBatchAppendedIterator, error) {
+	for {
+		ctxt, cancel := context.WithTimeout(opts.Context, DefaultConnectionTimeout)
+		opts.Context = ctxt
+		res, err := filterer.FilterStateBatchAppended(opts, nil)
+		switch err {
+		case nil:
+			cancel()
+			return res, err
+		default:
+			logger.Error("Error fetching filter", "err", err)
+			break
+		}
+		time.Sleep(clientRetryInterval)
+	}
+}
+
+// FilterETHDepositInitiatedWithRetry retries the given func until it succeeds,
+// waiting for clientRetryInterval duration after every call.
+func FilterETHDepositInitiatedWithRetry(filterer *l1bridge.L1StandardBridgeFilterer, opts *bind.FilterOpts) (*l1bridge.L1StandardBridgeETHDepositInitiatedIterator, error) {
+	for {
+		ctxt, cancel := context.WithTimeout(opts.Context, DefaultConnectionTimeout)
+		opts.Context = ctxt
+		res, err := filterer.FilterETHDepositInitiated(opts, nil, nil)
+		switch err {
+		case nil:
+			cancel()
+			return res, err
+		default:
+			logger.Error("Error fetching filter", "err", err)
+			break
+		}
+		time.Sleep(clientRetryInterval)
+	}
+}
+
+// FilterERC20DepositInitiatedWithRetry retries the given func until it succeeds,
+// waiting for clientRetryInterval duration after every call.
+func FilterERC20DepositInitiatedWithRetry(filterer *l1bridge.L1StandardBridgeFilterer, opts *bind.FilterOpts) (*l1bridge.L1StandardBridgeERC20DepositInitiatedIterator, error) {
+	for {
+		ctxt, cancel := context.WithTimeout(opts.Context, DefaultConnectionTimeout)
+		opts.Context = ctxt
+		res, err := filterer.FilterERC20DepositInitiated(opts, nil, nil, nil)
+		switch err {
+		case nil:
+			cancel()
+			return res, err
+		default:
+			logger.Error("Error fetching filter", "err", err)
+			break
+		}
+		time.Sleep(clientRetryInterval)
+	}
+}

go/indexer/services/l1/bridge/log.go

+package bridge
+
+import "github.com/ethereum/go-ethereum/log"
+
+var logger = log.New("service", "l1-bridge")

go/indexer/services/l1/bridge/standard_bridge.go

+package bridge
+
+import (
+	"context"
+
+	"github.com/ethereum-optimism/optimism/go/indexer/bindings/l1bridge"
+	"github.com/ethereum-optimism/optimism/go/indexer/db"
+	"github.com/ethereum/go-ethereum/accounts/abi/bind"
+	"github.com/ethereum/go-ethereum/common"
+)
+
+type StandardBridge struct {
+	name     string
+	ctx      context.Context
+	address  common.Address
+	client   bind.ContractFilterer
+	filterer *l1bridge.L1StandardBridgeFilterer
+}
+
+func (s *StandardBridge) Address() common.Address {
+	return s.address
+}
+
+func (s *StandardBridge) GetDepositsByBlockRange(start, end uint64) (DepositsMap, error) {
+	depositsByBlockhash := make(DepositsMap)
+
+	iter, err := FilterERC20DepositInitiatedWithRetry(s.filterer, &bind.FilterOpts{
+		Start:   start,
+		End:     &end,
+		Context: s.ctx,
+	})
+	if err != nil {
+		logger.Error("Error fetching filter", "err", err)
+	}
+
+	for iter.Next() {
+		depositsByBlockhash[iter.Event.Raw.BlockHash] = append(
+			depositsByBlockhash[iter.Event.Raw.BlockHash], db.Deposit{
+				TxHash:      iter.Event.Raw.TxHash,
+				L1Token:     iter.Event.L1Token,
+				L2Token:     iter.Event.L2Token,
+				FromAddress: iter.Event.From,
+				ToAddress:   iter.Event.To,
+				Amount:      iter.Event.Amount,
+				Data:        iter.Event.Data,
+				LogIndex:    iter.Event.Raw.Index,
+			})
+	}
+	if err := iter.Error(); err != nil {
+		return nil, err
+	}
+
+	return depositsByBlockhash, nil
+}
+
+func (s *StandardBridge) String() string {
+	return s.name
+}

go/indexer/services/l1/confirmed_headers.go

+package l1
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"math/big"
+	"sync"
+	"time"
+
+	"github.com/ethereum/go-ethereum"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/common/hexutil"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/log"
+	"github.com/ethereum/go-ethereum/rpc"
+)
+
+const (
+	DefaultConnectionTimeout        = 20 * time.Second
+	DefaultConfDepth         uint64 = 20
+	DefaultMaxBatchSize      uint64 = 100
+)
+
+type NewHeader struct {
+	types.Header
+	Hash common.Hash
+}
+
+func (h *NewHeader) UnmarshalJSON(input []byte) error {
+	type NewHeader struct {
+		Hash        *common.Hash      `json:"hash"             gencodec:"required"`
+		ParentHash  *common.Hash      `json:"parentHash"       gencodec:"required"`
+		UncleHash   *common.Hash      `json:"sha3Uncles"       gencodec:"required"`
+		Coinbase    *common.Address   `json:"miner"            gencodec:"required"`
+		Root        *common.Hash      `json:"stateRoot"        gencodec:"required"`
+		TxHash      *common.Hash      `json:"transactionsRoot" gencodec:"required"`
+		ReceiptHash *common.Hash      `json:"receiptsRoot"     gencodec:"required"`
+		Bloom       *types.Bloom      `json:"logsBloom"        gencodec:"required"`
+		Difficulty  *hexutil.Big      `json:"difficulty"       gencodec:"required"`
+		Number      *hexutil.Big      `json:"number"           gencodec:"required"`
+		GasLimit    *hexutil.Uint64   `json:"gasLimit"         gencodec:"required"`
+		GasUsed     *hexutil.Uint64   `json:"gasUsed"          gencodec:"required"`
+		Time        *hexutil.Uint64   `json:"timestamp"        gencodec:"required"`
+		Extra       *hexutil.Bytes    `json:"extraData"        gencodec:"required"`
+		MixDigest   *common.Hash      `json:"mixHash"`
+		Nonce       *types.BlockNonce `json:"nonce"`
+		BaseFee     *hexutil.Big      `json:"baseFeePerGas" rlp:"optional"`
+	}
+	var dec NewHeader
+	if err := json.Unmarshal(input, &dec); err != nil {
+		return err
+	}
+	if dec.Hash == nil {
+		return errors.New("missing required field 'hash' for Header")
+	}
+	h.Hash = *dec.Hash
+	if dec.ParentHash == nil {
+		return errors.New("missing required field 'parentHash' for Header")
+	}
+	h.ParentHash = *dec.ParentHash
+	if dec.UncleHash == nil {
+		return errors.New("missing required field 'sha3Uncles' for Header")
+	}
+	h.UncleHash = *dec.UncleHash
+	if dec.Coinbase == nil {
+		return errors.New("missing required field 'miner' for Header")
+	}
+	h.Coinbase = *dec.Coinbase
+	if dec.Root == nil {
+		return errors.New("missing required field 'stateRoot' for Header")
+	}
+	h.Root = *dec.Root
+	if dec.TxHash == nil {
+		return errors.New("missing required field 'transactionsRoot' for Header")
+	}
+	h.TxHash = *dec.TxHash
+	if dec.ReceiptHash == nil {
+		return errors.New("missing required field 'receiptsRoot' for Header")
+	}
+	h.ReceiptHash = *dec.ReceiptHash
+	if dec.Bloom == nil {
+		return errors.New("missing required field 'logsBloom' for Header")
+	}
+	h.Bloom = *dec.Bloom
+	if dec.Difficulty == nil {
+		return errors.New("missing required field 'difficulty' for Header")
+	}
+	h.Difficulty = (*big.Int)(dec.Difficulty)
+	if dec.Number == nil {
+		return errors.New("missing required field 'number' for Header")
+	}
+	h.Number = (*big.Int)(dec.Number)
+	if dec.GasLimit == nil {
+		return errors.New("missing required field 'gasLimit' for Header")
+	}
+	h.GasLimit = uint64(*dec.GasLimit)
+	if dec.GasUsed == nil {
+		return errors.New("missing required field 'gasUsed' for Header")
+	}
+	h.GasUsed = uint64(*dec.GasUsed)
+	if dec.Time == nil {
+		return errors.New("missing required field 'timestamp' for Header")
+	}
+	h.Time = uint64(*dec.Time)
+	if dec.Extra == nil {
+		return errors.New("missing required field 'extraData' for Header")
+	}
+	h.Extra = *dec.Extra
+	if dec.MixDigest != nil {
+		h.MixDigest = *dec.MixDigest
+	}
+	if dec.Nonce != nil {
+		h.Nonce = *dec.Nonce
+	}
+	if dec.BaseFee != nil {
+		h.BaseFee = (*big.Int)(dec.BaseFee)
+	}
+	return nil
+}
+
+type HeaderSelectorConfig struct {
+	ConfDepth    uint64
+	MaxBatchSize uint64
+}
+
+type ConfirmedHeaderSelector struct {
+	cfg HeaderSelectorConfig
+}
+
+func toBlockNumArg(number *big.Int) string {
+	if number == nil {
+		return "latest"
+	}
+	pending := big.NewInt(-1)
+	if number.Cmp(pending) == 0 {
+		return "pending"
+	}
+	return hexutil.EncodeBig(number)
+}
+
+func HeaderByNumber(ctx context.Context, client *rpc.Client, height *big.Int) (*NewHeader, error) {
+	var head *NewHeader
+	err := client.CallContext(ctx, &head, "eth_getBlockByNumber", toBlockNumArg(height), false)
+	if err == nil && head == nil {
+		err = ethereum.NotFound
+	}
+	return head, nil
+}
+
+func (f *ConfirmedHeaderSelector) NewHead(
+	ctx context.Context,
+	lowest uint64,
+	header *types.Header,
+	client *rpc.Client,
+) []*NewHeader {
+
+	number := header.Number.Uint64()
+	blockHash := header.Hash
+
+	logger.Info("New block", "block", number, "hash", blockHash)
+
+	if number < f.cfg.ConfDepth {
+		return nil
+	}
+	endHeight := number - f.cfg.ConfDepth + 1
+
+	minNextHeight := lowest + f.cfg.ConfDepth
+	if minNextHeight > number {
+		log.Info("Fork block ", "block", number, "hash", blockHash)
+		return nil
+	}
+	startHeight := lowest + 1
+
+	// Clamp to max batch size
+	if startHeight+f.cfg.MaxBatchSize < endHeight+1 {
+		endHeight = startHeight + f.cfg.MaxBatchSize - 1
+	}
+
+	nHeaders := endHeight - startHeight + 1
+	if nHeaders > 1 {
+		logger.Info("Loading block batch ",
+			"startHeight", startHeight, "endHeight", endHeight)
+	}
+
+	headers := make([]*NewHeader, nHeaders)
+	var wg sync.WaitGroup
+	for i := uint64(0); i < nHeaders; i++ {
+		wg.Add(1)
+		go func(ii uint64) {
+			defer wg.Done()
+
+			ctxt, cancel := context.WithTimeout(ctx, DefaultConnectionTimeout)
+			defer cancel()
+
+			height := startHeight + ii
+			bigHeight := new(big.Int).SetUint64(height)
+			header, err := HeaderByNumber(ctxt, client, bigHeight)
+			if err != nil {
+				log.Error("Unable to load block ", "block", height, "err", err)
+				return
+			}
+
+			headers[ii] = header
+		}(i)
+	}
+	wg.Wait()
+
+	logger.Debug("Verifying block range ",
+		"startHeight", startHeight, "endHeight", endHeight)
+
+	for i, header := range headers {
+		// Trim the returned headers if any of the lookups failed.
+		if header == nil {
+			headers = headers[:i]
+			break
+		}
+
+		// Assert that each header builds on the parent before it, trim if there
+		// are any discontinuities.
+		if i > 0 {
+			prevHeader := headers[i-1]
+			if prevHeader.Hash != header.ParentHash {
+				log.Error("Parent hash does not connect to ",
+					"block", header.Number.Uint64(), "hash", header.Hash,
+					"prev", prevHeader.Number.Uint64(), "hash", prevHeader.Hash)
+				headers = headers[:i]
+				break
+			}
+		}
+
+		log.Debug("Confirmed block ",
+			"block", header.Number.Uint64(), "hash", header.Hash)
+	}
+
+	return headers
+}
+
+func NewConfirmedHeaderSelector(cfg HeaderSelectorConfig) (*ConfirmedHeaderSelector,
+	error) {
+	if cfg.ConfDepth == 0 {
+		return nil, errors.New("ConfDepth must be greater than zero")
+	}
+	if cfg.MaxBatchSize == 0 {
+		return nil, errors.New("MaxBatchSize must be greater than zero")
+	}
+
+	return &ConfirmedHeaderSelector{
+		cfg: cfg,
+	}, nil
+}

go/indexer/services/l1/query.go

+package l1
+
+import (
+	"context"
+	"github.com/ethereum-optimism/optimism/go/indexer/bindings/l1erc20"
+	"github.com/ethereum/go-ethereum/ethclient"
+
+	"github.com/ethereum-optimism/optimism/go/indexer/bindings/scc"
+	"github.com/ethereum-optimism/optimism/go/indexer/db"
+	"github.com/ethereum-optimism/optimism/go/indexer/services/l1/bridge"
+	"github.com/ethereum/go-ethereum/accounts/abi/bind"
+	"github.com/ethereum/go-ethereum/common"
+)
+
+func QueryERC20(address common.Address, client *ethclient.Client) (*db.Token, error) {
+	contract, err := l1erc20.NewL1ERC20(address, client)
+	if err != nil {
+		return nil, err
+	}
+
+	name, err := contract.Name(&bind.CallOpts{})
+	if err != nil {
+		return nil, err
+	}
+
+	symbol, err := contract.Symbol(&bind.CallOpts{})
+	if err != nil {
+		return nil, err
+	}
+
+	decimals, err := contract.Decimals(&bind.CallOpts{})
+	if err != nil {
+		return nil, err
+	}
+
+	return &db.Token{
+		Name:     name,
+		Symbol:   symbol,
+		Decimals: decimals,
+	}, nil
+}
+
+
+func QueryStateBatches(filterer *scc.StateCommitmentChainFilterer, startHeight, endHeight uint64, ctx context.Context) (map[common.Hash][]db.StateBatch, error) {
+	batches := make(map[common.Hash][]db.StateBatch)
+
+	iter, err := bridge.FilterStateBatchAppendedWithRetry(filterer, &bind.FilterOpts{
+		Start:   startHeight,
+		End:     &endHeight,
+		Context: ctx,
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	for iter.Next() {
+		batches[iter.Event.Raw.BlockHash] = append(
+			batches[iter.Event.Raw.BlockHash], db.StateBatch{
+				Index:     iter.Event.BatchIndex,
+				Root:      iter.Event.BatchRoot,
+				Size:      iter.Event.BatchSize,
+				PrevTotal: iter.Event.PrevTotalElements,
+				ExtraData: iter.Event.ExtraData,
+				BlockHash: iter.Event.Raw.BlockHash,
+			})
+	}
+	if err := iter.Error(); err != nil {
+		return nil, err
+	}
+	return batches, nil
+}

go/indexer/services/l1/service.go

+package l1
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"math/big"
+	"net/http"
+	"strconv"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"github.com/ethereum-optimism/optimism/go/indexer/metrics"
+	"github.com/prometheus/client_golang/prometheus"
+
+	"github.com/ethereum-optimism/optimism/go/indexer/bindings/scc"
+	"github.com/ethereum-optimism/optimism/go/indexer/server"
+	"github.com/ethereum-optimism/optimism/go/indexer/services/l1/bridge"
+
+	_ "github.com/lib/pq"
+
+	"github.com/ethereum-optimism/optimism/go/indexer/db"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/ethclient"
+	"github.com/ethereum/go-ethereum/log"
+	"github.com/ethereum/go-ethereum/rpc"
+	"github.com/gorilla/mux"
+)
+
+var logger = log.New("service", "l1")
+
+// errNoChainID represents the error when the chain id is not provided
+// and it cannot be remotely fetched
+var errNoChainID = errors.New("no chain id provided")
+
+// errWrongChainID represents the error when the configured chain id is not
+// correct
+var errWrongChainID = errors.New("wrong chain id provided")
+
+var errNoNewBlocks = errors.New("no new blocks")
+
+// clientRetryInterval is the interval to wait between retrying client API
+// calls.
+var clientRetryInterval = 5 * time.Second
+
+var ZeroAddress common.Address
+
+// HeaderByNumberWithRetry retries the given func until it succeeds, waiting
+// for clientRetryInterval duration after every call.
+func HeaderByNumberWithRetry(ctx context.Context,
+	client *ethclient.Client) (*types.Header, error) {
+	for {
+		res, err := client.HeaderByNumber(ctx, nil)
+		switch err {
+		case nil:
+			return res, err
+		default:
+			log.Error("Error fetching header", "err", err)
+			break
+		}
+		time.Sleep(clientRetryInterval)
+	}
+}
+
+// Driver is an interface for indexing deposits from l1.
+type Driver interface {
+	// Name is an identifier used to prefix logs for a particular service.
+	Name() string
+}
+
+type ServiceConfig struct {
+	Context               context.Context
+	Metrics               *metrics.Metrics
+	L1Client              *ethclient.Client
+	RawL1Client           *rpc.Client
+	ChainID               *big.Int
+	AddressManagerAddress common.Address
+	ConfDepth             uint64
+	MaxHeaderBatchSize    uint64
+	StartBlockNumber      uint64
+	StartBlockHash        string
+	DB                    *db.Database
+}
+
+type Service struct {
+	cfg    ServiceConfig
+	ctx    context.Context
+	cancel func()
+
+	bridges        map[string]bridge.Bridge
+	batchScanner   *scc.StateCommitmentChainFilterer
+	latestHeader   uint64
+	headerSelector *ConfirmedHeaderSelector
+
+	metrics *metrics.Metrics
+	tokenCache map[common.Address]*db.Token
+	wg sync.WaitGroup
+}
+
+type IndexerStatus struct {
+	Synced  float64           `json:"synced"`
+	Highest db.L1BlockLocator `json:"highest_block"`
+}
+
+func NewService(cfg ServiceConfig) (*Service, error) {
+	ctx, cancel := context.WithCancel(cfg.Context)
+
+	// Handle restart logic
+
+	logger.Info("Creating L1 Indexer")
+
+	chainID, err := cfg.L1Client.ChainID(context.Background())
+	if err != nil {
+		cancel()
+		return nil, err
+	}
+	if cfg.ChainID.Cmp(chainID) != 0 {
+		cancel()
+		return nil, fmt.Errorf("chain ID configured with %d but got %d", cfg.ChainID, chainID)
+	}
+
+	addrs, err := bridge.NewAddresses(cfg.L1Client, cfg.AddressManagerAddress)
+	if err != nil {
+		cancel()
+		return nil, err
+	}
+
+	bridges, err := bridge.BridgesByChainID(cfg.ChainID, cfg.L1Client, addrs, ctx)
+	if err != nil {
+		cancel()
+		return nil, err
+	}
+
+	batchScanner, err := bridge.StateCommitmentChainScanner(cfg.L1Client, addrs)
+	if err != nil {
+		cancel()
+		return nil, err
+	}
+
+	logger.Info("Scanning bridges for deposits", "bridges", bridges)
+
+	confirmedHeaderSelector, err := NewConfirmedHeaderSelector(HeaderSelectorConfig{
+		ConfDepth:    cfg.ConfDepth,
+		MaxBatchSize: cfg.MaxHeaderBatchSize,
+	})
+
+	if err != nil {
+		cancel()
+		return nil, err
+	}
+
+	return &Service{
+		cfg:            cfg,
+		ctx:            ctx,
+		cancel:         cancel,
+		bridges:        bridges,
+		batchScanner:   batchScanner,
+		headerSelector: confirmedHeaderSelector,
+		metrics:        cfg.Metrics,
+		tokenCache: map[common.Address]*db.Token{
+			ZeroAddress: db.ETHL1Token,
+		},
+	}, nil
+}
+
+func (s *Service) Loop(ctx context.Context) {
+	for {
+		err := s.catchUp(ctx)
+		if err == nil {
+			break
+		}
+		if err == context.Canceled {
+			return
+		}
+
+		logger.Error("error catching up to tip, trying again in a bit", "err", err)
+		time.Sleep(10 * time.Second)
+		continue
+	}
+
+	newHeads := make(chan *types.Header, 1000)
+	go s.subscribeNewHeads(ctx, newHeads)
+
+	for {
+		select {
+		case header := <-newHeads:
+			if header == nil {
+				break
+			}
+
+			logger.Info("Received new header", "header", header.Hash)
+			atomic.StoreUint64(&s.latestHeader, header.Number.Uint64())
+			for {
+				err := s.Update(header)
+				if err != nil && err != errNoNewBlocks {
+					logger.Error("Unable to update indexer ", "err", err)
+				}
+				break
+			}
+		case <-s.ctx.Done():
+			return
+		}
+	}
+}
+
+func (s *Service) Update(newHeader *types.Header) error {
+	var lowest = db.L1BlockLocator{
+		Number: s.cfg.StartBlockNumber,
+		Hash:   common.HexToHash(s.cfg.StartBlockHash),
+	}
+	highestConfirmed, err := s.cfg.DB.GetHighestL1Block()
+	if err != nil {
+		return err
+	}
+	if highestConfirmed != nil {
+		lowest = *highestConfirmed
+	}
+
+	headers := s.headerSelector.NewHead(s.ctx, lowest.Number, newHeader, s.cfg.RawL1Client)
+	if len(headers) == 0 {
+		return errNoNewBlocks
+	}
+
+	if lowest.Number+1 != headers[0].Number.Uint64() {
+		logger.Error("Block number does not immediately follow ",
+			"block", headers[0].Number.Uint64(), "hash", headers[0].Hash,
+			"lowest_block", lowest.Number, "hash", lowest.Hash)
+		return nil
+	}
+
+	if lowest.Hash != headers[0].ParentHash {
+		logger.Error("Parent hash does not connect to ",
+			"block", headers[0].Number.Uint64(), "hash", headers[0].Hash,
+			"lowest_block", lowest.Number, "hash", lowest.Hash)
+		return nil
+	}
+
+	startHeight := headers[0].Number.Uint64()
+	endHeight := headers[len(headers)-1].Number.Uint64()
+	depositsByBlockHash := make(map[common.Hash][]db.Deposit)
+
+	start := prometheus.NewTimer(s.metrics.UpdateDuration.WithLabelValues("l1"))
+	defer func() {
+		dur := start.ObserveDuration()
+		logger.Info("updated index", "start_height", startHeight, "end_height", endHeight, "duration", dur)
+	}()
+
+	bridgeDepositsCh := make(chan bridge.DepositsMap, len(s.bridges))
+	errCh := make(chan error, len(s.bridges))
+
+	for _, bridgeImpl := range s.bridges {
+		go func(b bridge.Bridge) {
+			deposits, err := b.GetDepositsByBlockRange(startHeight, endHeight)
+			if err != nil {
+				errCh <- err
+				return
+			}
+			bridgeDepositsCh <- deposits
+		}(bridgeImpl)
+	}
+
+	var receives int
+	for {
+		select {
+		case bridgeDeposits := <-bridgeDepositsCh:
+			for blockHash, deposits := range bridgeDeposits {
+				for _, deposit := range deposits {
+					if err := s.cacheToken(deposit); err != nil {
+						logger.Warn("error caching token", "err", err)
+					}
+				}
+
+				depositsByBlockHash[blockHash] = append(depositsByBlockHash[blockHash], deposits...)
+			}
+		case err := <-errCh:
+			return err
+		}
+
+		receives++
+		if receives == len(s.bridges) {
+			break
+		}
+	}
+
+	stateBatches, err := QueryStateBatches(s.batchScanner, startHeight, endHeight, s.ctx)
+	if err != nil {
+		logger.Error("Error querying state batches", "err", err)
+	}
+
+	for _, header := range headers {
+		blockHash := header.Hash
+		number := header.Number.Uint64()
+		deposits := depositsByBlockHash[blockHash]
+
+		block := &db.IndexedL1Block{
+			Hash:       blockHash,
+			ParentHash: header.ParentHash,
+			Number:     number,
+			Timestamp:  header.Time,
+			Deposits:   deposits,
+		}
+
+		err := s.cfg.DB.AddIndexedL1Block(block)
+		if err != nil {
+			logger.Error(
+				"Unable to import ",
+				"block", number,
+				"hash", blockHash, "err", err,
+				"block", block,
+			)
+			return err
+		}
+
+		batches := stateBatches[blockHash]
+		err = s.cfg.DB.AddStateBatch(batches)
+		if err != nil {
+			logger.Error(
+				"Unable to import state append batch",
+				"block", number,
+				"hash", blockHash, "err", err,
+				"block", block,
+			)
+			return err
+		}
+		s.metrics.RecordStateBatches(len(batches))
+
+		logger.Debug("Imported ",
+			"block", number, "hash", blockHash, "deposits", len(block.Deposits))
+		for _, deposit := range block.Deposits {
+			token := s.tokenCache[deposit.L1Token]
+			logger.Info(
+				"indexed deposit",
+				"tx_hash", deposit.TxHash,
+				"symbol", token.Symbol,
+				"amount", deposit.Amount,
+			)
+			s.metrics.RecordDeposit(deposit.L1Token)
+		}
+	}
+
+	newHeaderNumber := newHeader.Number.Uint64()
+	s.metrics.SetL1SyncHeight(endHeight)
+	s.metrics.SetL1SyncPercent(endHeight, newHeaderNumber)
+	latestHeaderNumber := headers[len(headers)-1].Number.Uint64()
+	if latestHeaderNumber+s.cfg.ConfDepth-1 == newHeaderNumber {
+		return errNoNewBlocks
+	}
+	return nil
+}
+
+func (s *Service) GetIndexerStatus(w http.ResponseWriter, r *http.Request) {
+	highestBlock, err := s.cfg.DB.GetHighestL1Block()
+	if err != nil {
+		server.RespondWithError(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+
+	var synced float64
+	if s.latestHeader != 0 {
+		synced = float64(highestBlock.Number) / float64(s.latestHeader)
+	}
+
+	status := &IndexerStatus{
+		Synced:  synced,
+		Highest: *highestBlock,
+	}
+
+	server.RespondWithJSON(w, http.StatusOK, status)
+}
+
+func (s *Service) GetDeposits(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+
+	limitStr := r.URL.Query().Get("limit")
+	limit, err := strconv.ParseUint(limitStr, 10, 64)
+	if err != nil && limitStr != "" {
+		server.RespondWithError(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+	if limit == 0 {
+		limit = 10
+	}
+
+	offsetStr := r.URL.Query().Get("offset")
+	offset, err := strconv.ParseUint(offsetStr, 10, 64)
+	if err != nil && offsetStr != "" {
+		server.RespondWithError(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+
+	page := db.PaginationParam{
+		Limit:  uint64(limit),
+		Offset: uint64(offset),
+	}
+
+	deposits, err := s.cfg.DB.GetDepositsByAddress(common.HexToAddress(vars["address"]), page)
+	if err != nil {
+		server.RespondWithError(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+
+	server.RespondWithJSON(w, http.StatusOK, deposits)
+}
+
+func (s *Service) subscribeNewHeads(ctx context.Context, heads chan *types.Header) {
+	tick := time.NewTicker(5 * time.Second)
+
+	for {
+		select {
+		case <-tick.C:
+			header, err := HeaderByNumberWithRetry(ctx, s.cfg.L1Client)
+			if err != nil {
+				logger.Error("error fetching header by number", "err", err)
+			}
+			heads <- header
+		case <-ctx.Done():
+			return
+		}
+	}
+}
+
+func (s *Service) catchUp(ctx context.Context) error {
+	realHead, err := HeaderByNumberWithRetry(ctx, s.cfg.L1Client)
+	if err != nil {
+		return err
+	}
+	realHeadNum := realHead.Number.Uint64()
+
+	currHead, err := s.cfg.DB.GetHighestL1Block()
+	if err != nil {
+		return err
+	}
+	var currHeadNum uint64
+	if currHead != nil {
+		currHeadNum = currHead.Number
+	}
+
+	if realHeadNum-s.cfg.ConfDepth <= currHeadNum+s.cfg.MaxHeaderBatchSize {
+		return nil
+	}
+
+	logger.Info("chain is far behind head, resyncing")
+	s.metrics.SetL1CatchingUp(true)
+
+	for realHeadNum-s.cfg.ConfDepth > currHeadNum+s.cfg.MaxHeaderBatchSize {
+		select {
+		case <-ctx.Done():
+			return context.Canceled
+		default:
+			if err := s.Update(realHead); err != nil && err != errNoNewBlocks {
+				return err
+			}
+			currHead, err := s.cfg.DB.GetHighestL1Block()
+			if err != nil {
+				return err
+			}
+			currHeadNum = currHead.Number
+		}
+	}
+
+	logger.Info("indexer is close enough to tip, starting regular loop")
+	s.metrics.SetL1CatchingUp(false)
+	return nil
+}
+
+func (s *Service) cacheToken(deposit db.Deposit) error {
+	if s.tokenCache[deposit.L1Token] != nil {
+		return nil
+	}
+
+	token, err := s.cfg.DB.GetL1TokenByAddress(deposit.L1Token.String())
+	if err != nil {
+		return err
+	}
+	if token != nil {
+		s.metrics.IncL1CachedTokensCount()
+		s.tokenCache[deposit.L1Token] = token
+		return nil
+	}
+
+	token, err = QueryERC20(deposit.L1Token, s.cfg.L1Client)
+	if err != nil {
+		logger.Error("Error querying ERC20 token details",
+			"l1_token", deposit.L1Token.String(), "err", err)
+		token = &db.Token{
+			Address: deposit.L1Token.String(),
+		}
+	}
+	if err := s.cfg.DB.AddL1Token(deposit.L1Token.String(), token); err != nil {
+		return err
+	}
+	s.tokenCache[deposit.L1Token] = token
+	s.metrics.IncL1CachedTokensCount()
+	return nil
+}
+
+func (s *Service) Start() error {
+	if s.cfg.ChainID == nil {
+		return errNoChainID
+	}
+	s.wg.Add(1)
+	go s.Loop(s.ctx)
+	return nil
+}
+
+func (s *Service) Stop() error {
+	s.cancel()
+	s.wg.Wait()
+	if err := s.cfg.DB.Close(); err != nil {
+		return err
+	}
+	return nil
+}

go/indexer/services/l2/bridge/bridge.go

+package bridge
+
+import (
+	"context"
+	"errors"
+	"math/big"
+
+	"github.com/ethereum-optimism/optimism/go/indexer/bindings/l2bridge"
+	"github.com/ethereum-optimism/optimism/go/indexer/db"
+
+	"github.com/ethereum-optimism/optimism/l2geth/accounts/abi/bind"
+	"github.com/ethereum-optimism/optimism/l2geth/common"
+)
+
+type WithdrawalsMap map[common.Hash][]db.Withdrawal
+
+type Bridge interface {
+	Address() common.Address
+	GetWithdrawalsByBlockRange(uint64, uint64) (WithdrawalsMap, error)
+	String() string
+}
+
+type implConfig struct {
+	name string
+	impl string
+	addr string
+}
+
+var defaultBridgeCfgs = []*implConfig{
+	{"Standard", "StandardBridge", L2StandardBridgeAddr},
+}
+
+var customBridgeCfgs = map[uint64][]*implConfig{
+	// Mainnet
+	10: {
+		{"BitBTC", StandardBridgeImpl, "0xaBA2c5F108F7E820C049D5Af70B16ac266c8f128"},
+		//{"DAI", "DAIBridge", "0x10E6593CDda8c58a1d0f14C5164B376352a55f2F"},
+	},
+	// Kovan
+	69: {
+		{"BitBTC", StandardBridgeImpl, "0x0b651A42F32069d62d5ECf4f2a7e5Bd3E9438746"},
+		{"USX", StandardBridgeImpl, "0x40E862341b2416345F02c41Ac70df08525150dC7"},
+		//{"DAI", "	DAIBridge", "0xb415e822C4983ecD6B1c1596e8a5f976cf6CD9e3"},
+	},
+}
+
+func BridgesByChainID(chainID *big.Int, client bind.ContractFilterer, ctx context.Context) (map[string]Bridge, error) {
+	allCfgs := make([]*implConfig, 0)
+	allCfgs = append(allCfgs, defaultBridgeCfgs...)
+	allCfgs = append(allCfgs, customBridgeCfgs[chainID.Uint64()]...)
+
+	bridges := make(map[string]Bridge)
+	for _, bridge := range allCfgs {
+		switch bridge.impl {
+		case "StandardBridge":
+			l2StandardBridgeAddress := common.HexToAddress(bridge.addr)
+			l2StandardBridgeFilter, err := l2bridge.NewL2StandardBridgeFilterer(l2StandardBridgeAddress, client)
+			if err != nil {
+				return nil, err
+			}
+
+			standardBridge := &StandardBridge{
+				name:     bridge.name,
+				ctx:      ctx,
+				address:  l2StandardBridgeAddress,
+				client:   client,
+				filterer: l2StandardBridgeFilter,
+			}
+			bridges[bridge.name] = standardBridge
+		default:
+			return nil, errors.New("unsupported bridge")
+		}
+	}
+	return bridges, nil
+}

go/indexer/services/l2/bridge/const.go

+package bridge
+
+import "time"
+
+const (
+	DefaultConnectionTimeout = 60 * time.Second
+
+	L2StandardBridgeAddr = "0x4200000000000000000000000000000000000010"
+
+	StandardBridgeImpl = "StandardBridge"
+)

go/indexer/services/l2/bridge/filter.go

+package bridge
+
+import (
+	"context"
+	"time"
+
+	"github.com/ethereum-optimism/optimism/go/indexer/bindings/l2bridge"
+	"github.com/ethereum-optimism/optimism/l2geth/accounts/abi/bind"
+)
+
+// clientRetryInterval is the interval to wait between retrying client API
+// calls.
+var clientRetryInterval = 5 * time.Second
+
+// FilterWithdrawalInitiatedWithRetry retries the given func until it succeeds,
+// waiting for clientRetryInterval duration after every call.
+func FilterWithdrawalInitiatedWithRetry(filterer *l2bridge.L2StandardBridgeFilterer, opts *bind.FilterOpts) (*l2bridge.L2StandardBridgeWithdrawalInitiatedIterator, error) {
+	for {
+		ctxt, cancel := context.WithTimeout(opts.Context, DefaultConnectionTimeout)
+		opts.Context = ctxt
+		res, err := filterer.FilterWithdrawalInitiated(opts, nil, nil, nil)
+		switch err {
+		case nil:
+			cancel()
+			return res, err
+		default:
+			logger.Error("Error fetching filter", "err", err)
+			break
+		}
+		time.Sleep(clientRetryInterval)
+	}
+}

go/indexer/services/l2/bridge/log.go

+package bridge
+
+import "github.com/ethereum/go-ethereum/log"
+
+var logger = log.New("service", "l2-bridge")

go/indexer/services/l2/bridge/standard_bridge.go

+package bridge
+
+import (
+	"context"
+
+	"github.com/ethereum-optimism/optimism/go/indexer/bindings/l2bridge"
+	"github.com/ethereum-optimism/optimism/go/indexer/db"
+
+	"github.com/ethereum-optimism/optimism/l2geth/accounts/abi/bind"
+	"github.com/ethereum-optimism/optimism/l2geth/common"
+)
+
+type StandardBridge struct {
+	name     string
+	ctx      context.Context
+	address  common.Address
+	client   bind.ContractFilterer
+	filterer *l2bridge.L2StandardBridgeFilterer
+}
+
+func (s *StandardBridge) Address() common.Address {
+	return s.address
+}
+
+func (s *StandardBridge) GetWithdrawalsByBlockRange(start, end uint64) (WithdrawalsMap, error) {
+	withdrawalsByBlockhash := make(map[common.Hash][]db.Withdrawal)
+
+	iter, err := FilterWithdrawalInitiatedWithRetry(s.filterer, &bind.FilterOpts{
+		Start:   start,
+		End:     &end,
+		Context: s.ctx,
+	})
+	if err != nil {
+		logger.Error("Error fetching filter", "err", err)
+	}
+
+	for iter.Next() {
+		withdrawalsByBlockhash[iter.Event.Raw.BlockHash] = append(
+			withdrawalsByBlockhash[iter.Event.Raw.BlockHash], db.Withdrawal{
+				TxHash:      iter.Event.Raw.TxHash,
+				L1Token:     iter.Event.L1Token,
+				L2Token:     iter.Event.L2Token,
+				FromAddress: iter.Event.From,
+				ToAddress:   iter.Event.To,
+				Amount:      iter.Event.Amount,
+				Data:        iter.Event.Data,
+				LogIndex:    iter.Event.Raw.Index,
+			})
+	}
+	if err := iter.Error(); err != nil {
+		return nil, err
+	}
+
+	return withdrawalsByBlockhash, nil
+}
+
+func (s *StandardBridge) String() string {
+	return s.name
+}

go/indexer/services/l2/confirmed_headers.go

+package l2
+
+import (
+	"context"
+	"errors"
+	"math/big"
+	"sync"
+	"time"
+
+	"github.com/ethereum-optimism/optimism/l2geth/core/types"
+	l2ethclient "github.com/ethereum-optimism/optimism/l2geth/ethclient"
+	"github.com/ethereum-optimism/optimism/l2geth/log"
+)
+
+const (
+	DefaultConnectionTimeout        = 20 * time.Second
+	DefaultConfDepth         uint64 = 20
+	DefaultMaxBatchSize      uint64 = 100
+)
+
+type HeaderSelectorConfig struct {
+	ConfDepth    uint64
+	MaxBatchSize uint64
+}
+
+type ConfirmedHeaderSelector struct {
+	cfg HeaderSelectorConfig
+}
+
+func (f *ConfirmedHeaderSelector) NewHead(
+	ctx context.Context,
+	lowest uint64,
+	header *types.Header,
+	client *l2ethclient.Client,
+) []*types.Header {
+
+	number := header.Number.Uint64()
+	blockHash := header.Hash()
+
+	logger.Info("New block", "block", number, "hash", blockHash)
+
+	if number < f.cfg.ConfDepth {
+		return nil
+	}
+	endHeight := number - f.cfg.ConfDepth + 1
+
+	minNextHeight := lowest + f.cfg.ConfDepth
+	if minNextHeight > number {
+		log.Info("Fork block=%d hash=%s", number, blockHash)
+		return nil
+	}
+	startHeight := lowest + 1
+
+	// Clamp to max batch size
+	if startHeight+f.cfg.MaxBatchSize < endHeight+1 {
+		endHeight = startHeight + f.cfg.MaxBatchSize - 1
+	}
+
+	nHeaders := endHeight - startHeight + 1
+	if nHeaders > 1 {
+		logger.Info("Loading block batch ",
+			"startHeight", startHeight, "endHeight", endHeight)
+	}
+
+	headers := make([]*types.Header, nHeaders)
+	var wg sync.WaitGroup
+	for i := uint64(0); i < nHeaders; i++ {
+		wg.Add(1)
+		go func(ii uint64) {
+			defer wg.Done()
+
+			ctxt, cancel := context.WithTimeout(ctx, DefaultConnectionTimeout)
+			defer cancel()
+
+			height := startHeight + ii
+			bigHeight := new(big.Int).SetUint64(height)
+			header, err := client.HeaderByNumber(ctxt, bigHeight)
+			if err != nil {
+				log.Error("Unable to load block ", "block", height, "err", err)
+				return
+			}
+
+			headers[ii] = header
+		}(i)
+	}
+	wg.Wait()
+
+	logger.Debug("Verifying block range ",
+		"startHeight", startHeight, "endHeight", endHeight)
+
+	for i, header := range headers {
+		// Trim the returned headers if any of the lookups failed.
+		if header == nil {
+			headers = headers[:i]
+			break
+		}
+
+		// Assert that each header builds on the parent before it, trim if there
+		// are any discontinuities.
+		if i > 0 {
+			prevHeader := headers[i-1]
+			if prevHeader.Hash() != header.ParentHash {
+				log.Error("Parent hash does not connect to ",
+					"block", header.Number.Uint64(), "hash", header.Hash(),
+					"prev", prevHeader.Number.Uint64(), "hash", prevHeader.Hash())
+				headers = headers[:i]
+				break
+			}
+		}
+
+		log.Debug("Confirmed block ",
+			"block", header.Number.Uint64(), "hash", header.Hash())
+	}
+
+	return headers
+}
+
+func NewConfirmedHeaderSelector(cfg HeaderSelectorConfig) (*ConfirmedHeaderSelector,
+	error) {
+	if cfg.ConfDepth == 0 {
+		return nil, errors.New("ConfDepth must be greater than zero")
+	}
+	if cfg.MaxBatchSize == 0 {
+		return nil, errors.New("MaxBatchSize must be greater than zero")
+	}
+
+	return &ConfirmedHeaderSelector{
+		cfg: cfg,
+	}, nil
+}

go/indexer/services/l2/query.go

+package l2
+
+import (
+	"github.com/ethereum-optimism/optimism/go/indexer/bindings/l2erc20"
+	"github.com/ethereum-optimism/optimism/go/indexer/db"
+	"github.com/ethereum-optimism/optimism/l2geth/accounts/abi/bind"
+	l2common "github.com/ethereum-optimism/optimism/l2geth/common"
+	l2ethclient "github.com/ethereum-optimism/optimism/l2geth/ethclient"
+)
+
+func QueryERC20(address l2common.Address, client *l2ethclient.Client) (*db.Token, error) {
+	contract, err := l2erc20.NewL2ERC20(address, client)
+	if err != nil {
+		return nil, err
+	}
+
+	name, err := contract.Name(&bind.CallOpts{})
+	if err != nil {
+		return nil, err
+	}
+
+	symbol, err := contract.Symbol(&bind.CallOpts{})
+	if err != nil {
+		return nil, err
+	}
+
+	decimals, err := contract.Decimals(&bind.CallOpts{})
+	if err != nil {
+		return nil, err
+	}
+
+	return &db.Token{
+		Name:     name,
+		Symbol:   symbol,
+		Decimals: decimals,
+	}, nil
+}

go/indexer/services/l2/service.go

+package l2
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"math/big"
+	"net/http"
+	"strconv"
+	"sync"
+	"time"
+
+	"github.com/ethereum-optimism/optimism/go/indexer/metrics"
+	"github.com/prometheus/client_golang/prometheus"
+
+	"github.com/ethereum-optimism/optimism/go/indexer/db"
+	"github.com/ethereum-optimism/optimism/go/indexer/services/l2/bridge"
+	"github.com/ethereum-optimism/optimism/l2geth/common"
+	"github.com/ethereum-optimism/optimism/l2geth/core/types"
+	l2ethclient "github.com/ethereum-optimism/optimism/l2geth/ethclient"
+	"github.com/ethereum/go-ethereum/log"
+	"github.com/gorilla/mux"
+)
+
+var logger = log.New("service", "l2")
+
+// errNoChainID represents the error when the chain id is not provided
+// and it cannot be remotely fetched
+var errNoChainID = errors.New("no chain id provided")
+
+// errWrongChainID represents the error when the configured chain id is not
+// correct
+var errWrongChainID = errors.New("wrong chain id provided")
+
+var errNoNewBlocks = errors.New("no new blocks")
+
+// clientRetryInterval is the interval to wait between retrying client API
+// calls.
+var clientRetryInterval = 5 * time.Second
+
+// HeaderByNumberWithRetry retries the given func until it succeeds, waiting
+// for clientRetryInterval duration after every call.
+func HeaderByNumberWithRetry(ctx context.Context,
+	client *l2ethclient.Client) (*types.Header, error) {
+	for {
+		res, err := client.HeaderByNumber(ctx, nil)
+		switch err {
+		case nil:
+			return res, err
+		default:
+			log.Error("Error fetching header", "err", err)
+			break
+		}
+		time.Sleep(clientRetryInterval)
+	}
+}
+
+func respondWithError(w http.ResponseWriter, code int, message string) {
+	respondWithJSON(w, code, map[string]string{"error": message})
+}
+
+func respondWithJSON(w http.ResponseWriter, code int, payload interface{}) {
+	response, _ := json.Marshal(payload)
+
+	w.WriteHeader(code)
+	w.Header().Set("Content-Type", "application/json")
+	w.Write(response)
+}
+
+type ServiceConfig struct {
+	Context                 context.Context
+	Metrics                 *metrics.Metrics
+	L2Client                *l2ethclient.Client
+	ChainID                 *big.Int
+	ConfDepth               uint64
+	MaxHeaderBatchSize      uint64
+	StartBlockNumber        uint64
+	StartBlockHash          string
+	DB                      *db.Database
+}
+
+type Service struct {
+	cfg    ServiceConfig
+	ctx    context.Context
+	cancel func()
+
+	bridges        map[string]bridge.Bridge
+	latestHeader   uint64
+	headerSelector *ConfirmedHeaderSelector
+
+	metrics *metrics.Metrics
+	tokenCache map[common.Address]*db.Token
+	wg sync.WaitGroup
+}
+
+type IndexerStatus struct {
+	Synced  float64           `json:"synced"`
+	Highest db.L2BlockLocator `json:"highest_block"`
+}
+
+func NewService(cfg ServiceConfig) (*Service, error) {
+	ctx, cancel := context.WithCancel(cfg.Context)
+
+	// Handle restart logic
+
+	logger.Info("Creating L2 Indexer")
+
+	chainID, err := cfg.L2Client.ChainID(context.Background())
+	if err != nil {
+		cancel()
+		return nil, err
+	}
+
+	if cfg.ChainID != nil {
+		if cfg.ChainID.Cmp(chainID) != 0 {
+			cancel()
+			return nil, fmt.Errorf("%w: configured with %d and got %d",
+				errWrongChainID, cfg.ChainID, chainID)
+		}
+	} else {
+		cfg.ChainID = chainID
+	}
+
+	bridges, err := bridge.BridgesByChainID(cfg.ChainID, cfg.L2Client, ctx)
+	if err != nil {
+		cancel()
+		return nil, err
+	}
+
+	logger.Info("Scanning bridges for withdrawals", "bridges", bridges)
+
+	confirmedHeaderSelector, err := NewConfirmedHeaderSelector(HeaderSelectorConfig{
+		ConfDepth:    cfg.ConfDepth,
+		MaxBatchSize: cfg.MaxHeaderBatchSize,
+	})
+
+	if err != nil {
+		cancel()
+		return nil, err
+	}
+
+	return &Service{
+		cfg:            cfg,
+		ctx:            ctx,
+		cancel:         cancel,
+		bridges:        bridges,
+		headerSelector: confirmedHeaderSelector,
+		metrics:        cfg.Metrics,
+		tokenCache: map[common.Address]*db.Token{
+			db.ETHL2Address: db.ETHL1Token,
+		},
+	}, nil
+}
+
+func (s *Service) Loop(ctx context.Context) {
+	for {
+		err := s.catchUp(ctx)
+		if err == nil {
+			break
+		}
+		if err == context.Canceled {
+			return
+		}
+
+		logger.Error("error catching up to tip, trying again in a bit", "err", err)
+		time.Sleep(10 * time.Second)
+		continue
+	}
+
+	newHeads := make(chan *types.Header, 1000)
+	go s.subscribeNewHeads(ctx, newHeads)
+
+	for {
+		select {
+		case header := <-newHeads:
+			logger.Info("Received new header", "header", header.Hash)
+			for {
+				err := s.Update(header)
+				if err != nil && err != errNoNewBlocks {
+					logger.Error("Unable to update indexer ", "err", err)
+				}
+				break
+			}
+		case <-s.ctx.Done():
+			return
+		}
+	}
+}
+
+func (s *Service) Update(newHeader *types.Header) error {
+	var lowest = db.L2BlockLocator{
+		Number: s.cfg.StartBlockNumber,
+		Hash:   common.HexToHash(s.cfg.StartBlockHash),
+	}
+	highestConfirmed, err := s.cfg.DB.GetHighestL2Block()
+	if err != nil {
+		return err
+	}
+	if highestConfirmed != nil {
+		lowest = *highestConfirmed
+	}
+
+	headers := s.headerSelector.NewHead(s.ctx, lowest.Number, newHeader, s.cfg.L2Client)
+	if len(headers) == 0 {
+		return errNoNewBlocks
+	}
+
+	if lowest.Number+1 != headers[0].Number.Uint64() {
+		logger.Error("Block number does not immediately follow ",
+			"block", headers[0].Number.Uint64(), "hash", headers[0].Hash(),
+			"lowest_block", lowest.Number, "hash", lowest.Hash)
+		return nil
+	}
+
+	if lowest.Hash != headers[0].ParentHash {
+		logger.Error("Parent hash does not connect to ",
+			"block", headers[0].Number.Uint64(), "hash", headers[0].Hash(),
+			"lowest_block", lowest.Number, "hash", lowest.Hash)
+		return nil
+	}
+
+	startHeight := headers[0].Number.Uint64()
+	endHeight := headers[len(headers)-1].Number.Uint64()
+	withdrawalsByBlockHash := make(map[common.Hash][]db.Withdrawal)
+
+	start := prometheus.NewTimer(s.metrics.UpdateDuration.WithLabelValues("l2"))
+	defer func() {
+		dur := start.ObserveDuration()
+		logger.Info("updated index", "start_height", startHeight, "end_height", endHeight, "duration", dur)
+	}()
+
+	bridgeWdsCh := make(chan bridge.WithdrawalsMap)
+	errCh := make(chan error, len(s.bridges))
+
+	for _, bridgeImpl := range s.bridges {
+		go func(b bridge.Bridge) {
+			wds, err := b.GetWithdrawalsByBlockRange(startHeight, endHeight)
+			if err != nil {
+				errCh <- err
+				return
+			}
+			bridgeWdsCh <- wds
+		}(bridgeImpl)
+	}
+
+	var receives int
+	for {
+		select {
+		case bridgeWds := <-bridgeWdsCh:
+			for blockHash, withdrawals := range bridgeWds {
+				for _, wd := range withdrawals {
+					if err := s.cacheToken(wd); err != nil {
+						logger.Warn("error caching token", "err", err)
+					}
+				}
+
+				withdrawalsByBlockHash[blockHash] = append(withdrawalsByBlockHash[blockHash], withdrawals...)
+			}
+		case err := <-errCh:
+			return err
+		}
+
+		receives++
+		if receives == len(s.bridges) {
+			break
+		}
+	}
+
+	for _, header := range headers {
+		blockHash := header.Hash()
+		number := header.Number.Uint64()
+		withdrawals := withdrawalsByBlockHash[blockHash]
+
+		block := &db.IndexedL2Block{
+			Hash:        blockHash,
+			ParentHash:  header.ParentHash,
+			Number:      number,
+			Timestamp:   header.Time,
+			Withdrawals: withdrawals,
+		}
+
+		err := s.cfg.DB.AddIndexedL2Block(block)
+		if err != nil {
+			logger.Error(
+				"Unable to import ",
+				"block", number,
+				"hash", blockHash,
+				"err", err,
+				"block", block,
+			)
+			return err
+		}
+
+		logger.Debug("Imported ",
+			"block", number, "hash", blockHash, "withdrawals", len(block.Withdrawals))
+		for _, withdrawal := range block.Withdrawals {
+			token := s.tokenCache[withdrawal.L2Token]
+			logger.Info(
+				"indexed withdrawal ",
+				"tx_hash", withdrawal.TxHash,
+				"symbol", token.Symbol,
+				"amount", withdrawal.Amount,
+			)
+			s.metrics.RecordWithdrawal(withdrawal.L2Token)
+		}
+	}
+
+	newHeaderNumber := newHeader.Number.Uint64()
+	s.metrics.SetL2SyncHeight(endHeight)
+	s.metrics.SetL2SyncPercent(endHeight, newHeaderNumber)
+	latestHeaderNumber := headers[len(headers)-1].Number.Uint64()
+	if latestHeaderNumber+s.cfg.ConfDepth-1 == newHeaderNumber {
+		return errNoNewBlocks
+	}
+	return nil
+}
+
+func (s *Service) GetIndexerStatus(w http.ResponseWriter, r *http.Request) {
+	highestBlock, err := s.cfg.DB.GetHighestL2Block()
+	if err != nil {
+		respondWithError(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+
+	var synced float64
+	if s.latestHeader != 0 {
+		synced = float64(highestBlock.Number) / float64(s.latestHeader)
+	}
+
+	status := &IndexerStatus{
+		Synced:  synced,
+		Highest: *highestBlock,
+	}
+
+	respondWithJSON(w, http.StatusOK, status)
+}
+
+func (s *Service) GetWithdrawalBatch(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+
+	batch, err := s.cfg.DB.GetWithdrawalBatch(common.HexToHash(vars["hash"]))
+	if err != nil {
+		respondWithError(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+
+	respondWithJSON(w, http.StatusOK, batch)
+}
+
+func (s *Service) GetWithdrawals(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+
+	limitStr := r.URL.Query().Get("limit")
+	limit, err := strconv.ParseUint(limitStr, 10, 64)
+	if err != nil && limitStr != "" {
+		respondWithError(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+	if limit == 0 {
+		limit = 10
+	}
+
+	offsetStr := r.URL.Query().Get("offset")
+	offset, err := strconv.ParseUint(offsetStr, 10, 64)
+	if err != nil && offsetStr != "" {
+		respondWithError(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+
+	page := db.PaginationParam{
+		Limit:  uint64(limit),
+		Offset: uint64(offset),
+	}
+
+	withdrawals, err := s.cfg.DB.GetWithdrawalsByAddress(common.HexToAddress(vars["address"]), page)
+	if err != nil {
+		respondWithError(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+
+	respondWithJSON(w, http.StatusOK, withdrawals)
+}
+
+func (s *Service) subscribeNewHeads(ctx context.Context, heads chan *types.Header) {
+	tick := time.NewTicker(5 * time.Second)
+
+	for {
+		select {
+		case <-tick.C:
+			header, err := HeaderByNumberWithRetry(ctx, s.cfg.L2Client)
+			if err != nil {
+				logger.Error("error fetching header by number", "err", err)
+			}
+			heads <- header
+		case <-ctx.Done():
+			return
+		}
+	}
+}
+
+func (s *Service) catchUp(ctx context.Context) error {
+	realHead, err := HeaderByNumberWithRetry(ctx, s.cfg.L2Client)
+	if err != nil {
+		return err
+	}
+	realHeadNum := realHead.Number.Uint64()
+
+	currHead, err := s.cfg.DB.GetHighestL2Block()
+	if err != nil {
+		return err
+	}
+	var currHeadNum uint64
+	if currHead != nil {
+		currHeadNum = currHead.Number
+	}
+
+	if realHeadNum-s.cfg.ConfDepth <= currHeadNum+s.cfg.MaxHeaderBatchSize {
+		return nil
+	}
+
+	logger.Info("chain is far behind head, resyncing")
+	s.metrics.SetL2CatchingUp(true)
+
+	for realHeadNum-s.cfg.ConfDepth > currHeadNum+s.cfg.MaxHeaderBatchSize {
+		select {
+		case <-ctx.Done():
+			return context.Canceled
+		default:
+			if err := s.Update(realHead); err != nil && err != errNoNewBlocks {
+				return err
+			}
+			currHead, err := s.cfg.DB.GetHighestL2Block()
+			if err != nil {
+				return err
+			}
+			currHeadNum = currHead.Number
+		}
+	}
+
+	logger.Info("indexer is close enough to tip, starting regular loop")
+	s.metrics.SetL2CatchingUp(false)
+	return nil
+}
+
+func (s *Service) cacheToken(withdrawal db.Withdrawal) error {
+	if s.tokenCache[withdrawal.L2Token] != nil {
+		return nil
+	}
+
+	token, err := s.cfg.DB.GetL2TokenByAddress(withdrawal.L2Token.String())
+	if err != nil {
+		return err
+	}
+	if token != nil {
+		s.metrics.IncL2CachedTokensCount()
+		s.tokenCache[withdrawal.L2Token] = token
+		return nil
+	}
+	token, err = QueryERC20(withdrawal.L2Token, s.cfg.L2Client)
+	if err != nil {
+		logger.Error("Error querying ERC20 token details",
+			"l2_token", withdrawal.L2Token.String(), "err", err)
+		token = &db.Token{
+			Address: withdrawal.L2Token.String(),
+		}
+	}
+	if err := s.cfg.DB.AddL2Token(withdrawal.L2Token.String(), token); err != nil {
+		return err
+	}
+	s.tokenCache[withdrawal.L2Token] = token
+	s.metrics.IncL2CachedTokensCount()
+	return nil
+}
+
+func (s *Service) Start() error {
+	if s.cfg.ChainID == nil {
+		return errNoChainID
+	}
+	s.wg.Add(1)
+	go s.Loop(s.ctx)
+	return nil
+}
+
+func (s *Service) Stop() error {
+	s.cancel()
+	s.wg.Wait()
+	if err := s.cfg.DB.Close(); err != nil {
+		return err
+	}
+	return nil
+}

ops/docker/Dockerfile.indexer

+FROM golang:1.17.3-alpine3.13 as builder 
+
+RUN apk add --no-cache make gcc musl-dev linux-headers git jq bash
+
+COPY ./go/indexer /go/indexer
+COPY ./go/indexer/go.mod ./go/indexer/go.sum /go/indexer/
+WORKDIR /go/indexer
+RUN go mod graph | grep -v indexer | awk '{if ($1 !~ "@") print $2}' | xargs -n 1 go get
+COPY ./go/indexer/ ./
+RUN make
+
+FROM alpine:3.13
+
+COPY --from=builder /go/indexer/indexer /usr/local/bin
+
+CMD ["indexer"]

ops/envs/indexer.env

+BUILD_ENV=development
+ETH_NETWORK_NAME=clique
+LOG_LEVEL=debug
+
+L1_ETH_RPC=http://127.0.0.1:7545
+L2_ETH_RPC=http://127.0.0.1:4545
+L1_STANDARD_BRIDGE_ADDRESS=
+L2_STANDARD_BRIDGE_ADDRESS=
+L2_GENESIS_BLOCK_HASH=
+INDEXER_START_BLOCK_NUMBER=
+INDEXER_START_BLOCK_HASH=
+INDEXER_DB_HOST=localhost
+INDEXER_DB_PORT=5432
+INDEXER_DB_USER=postgres
+INDEXER_DB_PASSWORD=
+INDEXER_DB_NAME=indexer