custom-gas-token: add e2e test (#10440)

* add tests for activating custom gas token and bridging tokens to l2 * update test following concurrent change in SystemConfig ABI * update systemconfig bindings steps to reproduce: git checkout v1.7.3 -- op-bindings remove WETH9 from artifacts.json cd op-bindings make bindgen-generate-local select this one file discard the others * use require.NoError instead of require.Nil * build: fix * refactor using setup + subtests * add assertions for WETH name and symbol getters * minor changes in response to review * devnet-allocs: use sender with known private key some e2e tests require the ability to transact as the system owner safe owner, so we can't use the foundry default sender (private key unknown) This uses the same address as "Deployer" * use deployer as Safe owner * WIP refactor test * add most of the remaining test assertions * rename file * flatten out subtests we want to specify a strict ordering of operations * complete checkWithdrawal step * reorder test steps * check both ETH and token balances on l1 during withdraw * simplify callViaSafe helper * factor out expectations * add some extra boilerplate to track TransactionDeposited event and GasPayingTokenSet event on L2 * remove comments * remove wayward line * flatten out sub test * add comment to devnet forge script command * remove version check on systemConfig * update systemconfig bindings steps to reproduce: git checkout v1.7.3 -- op-bindings remove WETH9 from artifacts.json cd op-bindings make bindgen-generate-local select this one file discard the others * skip TestCustomGasToken when UseFPAC is true * use differente helper to skip test * harmonize use of context.Background{} * tidy up and add comments * remove cfg.DeployConfig.FinalizationPeriodSeconds = 2 * remove log lines * use decimal instead of hex --------- Co-authored-by: Mark Tyneway <mark.tyneway@gmail.com>

custom-gas-token: add e2e test (#10440)
* add tests for activating custom gas token and bridging tokens to l2 * update test following concurrent change in SystemConfig ABI * update systemconfig bindings steps to reproduce: git checkout v1.7.3 -- op-bindings remove WETH9 from artifacts.json cd op-bindings make bindgen-generate-local select this one file discard the others * use require.NoError instead of require.Nil * build: fix * refactor using setup + subtests * add assertions for WETH name and symbol getters * minor changes in response to review * devnet-allocs: use sender with known private key some e2e tests require the ability to transact as the system owner safe owner, so we can't use the foundry default sender (private key unknown) This uses the same address as "Deployer" * use deployer as Safe owner * WIP refactor test * add most of the remaining test assertions * rename file * flatten out subtests we want to specify a strict ordering of operations * complete checkWithdrawal step * reorder test steps * check both ETH and token balances on l1 during withdraw * simplify callViaSafe helper * factor out expectations * add some extra boilerplate to track TransactionDeposited event and GasPayingTokenSet event on L2 * remove comments * remove wayward line * flatten out sub test * add comment to devnet forge script command * remove version check on systemConfig * update systemconfig bindings steps to reproduce: git checkout v1.7.3 -- op-bindings remove WETH9 from artifacts.json cd op-bindings make bindgen-generate-local select this one file discard the others * skip TestCustomGasToken when UseFPAC is true * use differente helper to skip test * harmonize use of context.Background{} * tidy up and add comments * remove cfg.DeployConfig.FinalizationPeriodSeconds = 2 * remove log lines * use decimal instead of hex --------- Co-authored-by: Mark Tyneway <mark.tyneway@gmail.com>
4854ed90 · George C. Knee · GitHub · 1dd35b7c · 4854ed90 · 4854ed90
Commit 4854ed90 authored May 09, 2024 by George C. Knee Committed by GitHub May 09, 2024
4 changed files
--- a/bedrock-devnet/devnet/__init__.py
+++ b/bedrock-devnet/devnet/__init__.py
@@ -143,7 +143,10 @@ def devnet_l1_allocs(paths):

    fqn = 'scripts/Deploy.s.sol:Deploy'
    run_command([
-        'forge', 'script', fqn, "--sig", "runWithStateDump()"
+        # We need to set the sender here to an account we know the private key of,
+        # because the sender ends up being the owner of the ProxyAdmin SAFE
+        # (which we need to enable the Custom Gas Token feature).
+        'forge', 'script', fqn, "--sig", "runWithStateDump()", "--sender", "0x90F79bf6EB2c4f870365E785982E1f101E93b906"
    ], env={
      'DEPLOYMENT_OUTFILE': paths.l1_deployments_path,
      'DEPLOY_CONFIG_PATH': paths.devnet_config_path,

--- a/op-bindings/bindings/systemconfig.go
+++ b/op-bindings/bindings/systemconfig.go
@@ -43,7 +43,7 @@ type SystemConfigAddresses struct {
 	L1CrossDomainMessenger       common.Address
 	L1ERC721Bridge               common.Address
 	L1StandardBridge             common.Address
-	L2OutputOracle               common.Address
+	DisputeGameFactory           common.Address
 	OptimismPortal               common.Address
 	OptimismMintableERC20Factory common.Address
 	GasPayingToken               common.Address
@@ -51,8 +51,8 @@ type SystemConfigAddresses struct {

 // SystemConfigMetaData contains all meta data concerning the SystemConfig contract.
 var SystemConfigMetaData = &bind.MetaData{
-	ABI: "[{\"type\":\"constructor\",\"inputs\":[],\"stateMutability\":\"nonpayable\"},{\"type\":\"function\",\"name\":\"BATCH_INBOX_SLOT\",\"inputs\":[],\"outputs\":[{\"name\":\"\",\"type\":\"bytes32\",\"internalType\":\"bytes32\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"L1_CROSS_DOMAIN_MESSENGER_SLOT\",\"inputs\":[],\"outputs\":[{\"name\":\"\",\"type\":\"bytes32\",\"internalType\":\"bytes32\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"L1_ERC_721_BRIDGE_SLOT\",\"inputs\":[],\"outputs\":[{\"name\":\"\",\"type\":\"bytes32\",\"internalType\":\"bytes32\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"L1_STANDARD_BRIDGE_SLOT\",\"inputs\":[],\"outputs\":[{\"name\":\"\",\"type\":\"bytes32\",\"internalType\":\"bytes32\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"L2_OUTPUT_ORACLE_SLOT\",\"inputs\":[],\"outputs\":[{\"name\":\"\",\"type\":\"bytes32\",\"internalType\":\"bytes32\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"OPTIMISM_MINTABLE_ERC20_FACTORY_SLOT\",\"inputs\":[],\"outputs\":[{\"name\":\"\",\"type\":\"bytes32\",\"internalType\":\"bytes32\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"OPTIMISM_PORTAL_SLOT\",\"inputs\":[],\"outputs\":[{\"name\":\"\",\"type\":\"bytes32\",\"internalType\":\"bytes32\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"START_BLOCK_SLOT\",\"inputs\":[],\"outputs\":[{\"name\":\"\",\"type\":\"bytes32\",\"internalType\":\"bytes32\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"UNSAFE_BLOCK_SIGNER_SLOT\",\"inputs\":[],\"outputs\":[{\"name\":\"\",\"type\":\"bytes32\",\"internalType\":\"bytes32\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"VERSION\",\"inputs\":[],\"outputs\":[{\"name\":\"\",\"type\":\"uint256\",\"internalType\":\"uint256\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"batchInbox\",\"inputs\":[],\"outputs\":[{\"name\":\"addr_\",\"type\":\"address\",\"internalType\":\"address\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"batcherHash\",\"inputs\":[],\"outputs\":[{\"name\":\"\",\"type\":\"bytes32\",\"internalType\":\"bytes32\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"gasLimit\",\"inputs\":[],\"outputs\":[{\"name\":\"\",\"type\":\"uint64\",\"internalType\":\"uint64\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"gasPayingToken\",\"inputs\":[],\"outputs\":[{\"name\":\"addr_\",\"type\":\"address\",\"internalType\":\"address\"},{\"name\":\"decimals_\",\"type\":\"uint8\",\"internalType\":\"uint8\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"gasPayingTokenName\",\"inputs\":[],\"outputs\":[{\"name\":\"name_\",\"type\":\"string\",\"internalType\":\"string\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"gasPayingTokenSymbol\",\"inputs\":[],\"outputs\":[{\"name\":\"symbol_\",\"type\":\"string\",\"internalType\":\"string\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"initialize\",\"inputs\":[{\"name\":\"_owner\",\"type\":\"address\",\"internalType\":\"address\"},{\"name\":\"_overhead\",\"type\":\"uint256\",\"internalType\":\"uint256\"},{\"name\":\"_scalar\",\"type\":\"uint256\",\"internalType\":\"uint256\"},{\"name\":\"_batcherHash\",\"type\":\"bytes32\",\"internalType\":\"bytes32\"},{\"name\":\"_gasLimit\",\"type\":\"uint64\",\"internalType\":\"uint64\"},{\"name\":\"_unsafeBlockSigner\",\"type\":\"address\",\"internalType\":\"address\"},{\"name\":\"_config\",\"type\":\"tuple\",\"internalType\":\"structResourceMetering.ResourceConfig\",\"components\":[{\"name\":\"maxResourceLimit\",\"type\":\"uint32\",\"internalType\":\"uint32\"},{\"name\":\"elasticityMultiplier\",\"type\":\"uint8\",\"internalType\":\"uint8\"},{\"name\":\"baseFeeMaxChangeDenominator\",\"type\":\"uint8\",\"internalType\":\"uint8\"},{\"name\":\"minimumBaseFee\",\"type\":\"uint32\",\"internalType\":\"uint32\"},{\"name\":\"systemTxMaxGas\",\"type\":\"uint32\",\"internalType\":\"uint32\"},{\"name\":\"maximumBaseFee\",\"type\":\"uint128\",\"internalType\":\"uint128\"}]},{\"name\":\"_batchInbox\",\"type\":\"address\",\"internalType\":\"address\"},{\"name\":\"_addresses\",\"type\":\"tuple\",\"internalType\":\"structSystemConfig.Addresses\",\"components\":[{\"name\":\"l1CrossDomainMessenger\",\"type\":\"address\",\"internalType\":\"address\"},{\"name\":\"l1ERC721Bridge\",\"type\":\"address\",\"internalType\":\"address\"},{\"name\":\"l1StandardBridge\",\"type\":\"address\",\"internalType\":\"address\"},{\"name\":\"l2OutputOracle\",\"type\":\"address\",\"internalType\":\"address\"},{\"name\":\"optimismPortal\",\"type\":\"address\",\"internalType\":\"address\"},{\"name\":\"optimismMintableERC20Factory\",\"type\":\"address\",\"internalType\":\"address\"},{\"name\":\"gasPayingToken\",\"type\":\"address\",\"internalType\":\"address\"}]}],\"outputs\":[],\"stateMutability\":\"nonpayable\"},{\"type\":\"function\",\"name\":\"isCustomGasToken\",\"inputs\":[],\"outputs\":[{\"name\":\"\",\"type\":\"bool\",\"internalType\":\"bool\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"l1CrossDomainMessenger\",\"inputs\":[],\"outputs\":[{\"name\":\"addr_\",\"type\":\"address\",\"internalType\":\"address\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"l1ERC721Bridge\",\"inputs\":[],\"outputs\":[{\"name\":\"addr_\",\"type\":\"address\",\"internalType\":\"address\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"l1StandardBridge\",\"inputs\":[],\"outputs\":[{\"name\":\"addr_\",\"type\":\"address\",\"internalType\":\"address\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"l2OutputOracle\",\"inputs\":[],\"outputs\":[{\"name\":\"addr_\",\"type\":\"address\",\"internalType\":\"address\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"minimumGasLimit\",\"inputs\":[],\"outputs\":[{\"name\":\"\",\"type\":\"uint64\",\"internalType\":\"uint64\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"optimismMintableERC20Factory\",\"inputs\":[],\"outputs\":[{\"name\":\"addr_\",\"type\":\"address\",\"internalType\":\"address\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"optimismPortal\",\"inputs\":[],\"outputs\":[{\"name\":\"addr_\",\"type\":\"address\",\"internalType\":\"address\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"overhead\",\"inputs\":[],\"outputs\":[{\"name\":\"\",\"type\":\"uint256\",\"internalType\":\"uint256\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"owner\",\"inputs\":[],\"outputs\":[{\"name\":\"\",\"type\":\"address\",\"internalType\":\"address\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"renounceOwnership\",\"inputs\":[],\"outputs\":[],\"stateMutability\":\"nonpayable\"},{\"type\":\"function\",\"name\":\"resourceConfig\",\"inputs\":[],\"outputs\":[{\"name\":\"\",\"type\":\"tuple\",\"internalType\":\"structResourceMetering.ResourceConfig\",\"components\":[{\"name\":\"maxResourceLimit\",\"type\":\"uint32\",\"internalType\":\"uint32\"},{\"name\":\"elasticityMultiplier\",\"type\":\"uint8\",\"internalType\":\"uint8\"},{\"name\":\"baseFeeMaxChangeDenominator\",\"type\":\"uint8\",\"internalType\":\"uint8\"},{\"name\":\"minimumBaseFee\",\"type\":\"uint32\",\"internalType\":\"uint32\"},{\"name\":\"systemTxMaxGas\",\"type\":\"uint32\",\"internalType\":\"uint32\"},{\"name\":\"maximumBaseFee\",\"type\":\"uint128\",\"internalType\":\"uint128\"}]}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"scalar\",\"inputs\":[],\"outputs\":[{\"name\":\"\",\"type\":\"uint256\",\"internalType\":\"uint256\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"setBatcherHash\",\"inputs\":[{\"name\":\"_batcherHash\",\"type\":\"bytes32\",\"internalType\":\"bytes32\"}],\"outputs\":[],\"stateMutability\":\"nonpayable\"},{\"type\":\"function\",\"name\":\"setGasConfig\",\"inputs\":[{\"name\":\"_overhead\",\"type\":\"uint256\",\"internalType\":\"uint256\"},{\"name\":\"_scalar\",\"type\":\"uint256\",\"internalType\":\"uint256\"}],\"outputs\":[],\"stateMutability\":\"nonpayable\"},{\"type\":\"function\",\"name\":\"setGasLimit\",\"inputs\":[{\"name\":\"_gasLimit\",\"type\":\"uint64\",\"internalType\":\"uint64\"}],\"outputs\":[],\"stateMutability\":\"nonpayable\"},{\"type\":\"function\",\"name\":\"setResourceConfig\",\"inputs\":[{\"name\":\"_config\",\"type\":\"tuple\",\"internalType\":\"structResourceMetering.ResourceConfig\",\"components\":[{\"name\":\"maxResourceLimit\",\"type\":\"uint32\",\"internalType\":\"uint32\"},{\"name\":\"elasticityMultiplier\",\"type\":\"uint8\",\"internalType\":\"uint8\"},{\"name\":\"baseFeeMaxChangeDenominator\",\"type\":\"uint8\",\"internalType\":\"uint8\"},{\"name\":\"minimumBaseFee\",\"type\":\"uint32\",\"internalType\":\"uint32\"},{\"name\":\"systemTxMaxGas\",\"type\":\"uint32\",\"internalType\":\"uint32\"},{\"name\":\"maximumBaseFee\",\"type\":\"uint128\",\"internalType\":\"uint128\"}]}],\"outputs\":[],\"stateMutability\":\"nonpayable\"},{\"type\":\"function\",\"name\":\"setUnsafeBlockSigner\",\"inputs\":[{\"name\":\"_unsafeBlockSigner\",\"type\":\"address\",\"internalType\":\"address\"}],\"outputs\":[],\"stateMutability\":\"nonpayable\"},{\"type\":\"function\",\"name\":\"startBlock\",\"inputs\":[],\"outputs\":[{\"name\":\"startBlock_\",\"type\":\"uint256\",\"internalType\":\"uint256\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"transferOwnership\",\"inputs\":[{\"name\":\"newOwner\",\"type\":\"address\",\"internalType\":\"address\"}],\"outputs\":[],\"stateMutability\":\"nonpayable\"},{\"type\":\"function\",\"name\":\"unsafeBlockSigner\",\"inputs\":[],\"outputs\":[{\"name\":\"addr_\",\"type\":\"address\",\"internalType\":\"address\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"version\",\"inputs\":[],\"outputs\":[{\"name\":\"\",\"type\":\"string\",\"internalType\":\"string\"}],\"stateMutability\":\"view\"},{\"type\":\"event\",\"name\":\"ConfigUpdate\",\"inputs\":[{\"name\":\"version\",\"type\":\"uint256\",\"indexed\":true,\"internalType\":\"uint256\"},{\"name\":\"updateType\",\"type\":\"uint8\",\"indexed\":true,\"internalType\":\"enumSystemConfig.UpdateType\"},{\"name\":\"data\",\"type\":\"bytes\",\"indexed\":false,\"internalType\":\"bytes\"}],\"anonymous\":false},{\"type\":\"event\",\"name\":\"Initialized\",\"inputs\":[{\"name\":\"version\",\"type\":\"uint8\",\"indexed\":false,\"internalType\":\"uint8\"}],\"anonymous\":false},{\"type\":\"event\",\"name\":\"OwnershipTransferred\",\"inputs\":[{\"name\":\"previousOwner\",\"type\":\"address\",\"indexed\":true,\"internalType\":\"address\"},{\"name\":\"newOwner\",\"type\":\"address\",\"indexed\":true,\"internalType\":\"address\"}],\"anonymous\":false}]",
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"[{\"type\":\"constructor\",\"inputs\":[],\"stateMutability\":\"nonpayable\"},{\"type\":\"function\",\"name\":\"BATCH_INBOX_SLOT\",\"inputs\":[],\"outputs\":[{\"name\":\"\",\"type\":\"bytes32\",\"internalType\":\"bytes32\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"DISPUTE_GAME_FACTORY_SLOT\",\"inputs\":[],\"outputs\":[{\"name\":\"\",\"type\":\"bytes32\",\"internalType\":\"bytes32\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"L1_CROSS_DOMAIN_MESSENGER_SLOT\",\"inputs\":[],\"outputs\":[{\"name\":\"\",\"type\":\"bytes32\",\"internalType\":\"bytes32\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"L1_ERC_721_BRIDGE_SLOT\",\"inputs\":[],\"outputs\":[{\"name\":\"\",\"type\":\"bytes32\",\"internalType\":\"bytes32\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"L1_STANDARD_BRIDGE_SLOT\",\"inputs\":[],\"outputs\":[{\"name\":\"\",\"type\":\"bytes32\",\"internalType\":\"bytes32\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"OPTIMISM_MINTABLE_ERC20_FACTORY_SLOT\",\"inputs\":[],\"outputs\":[{\"name\":\"\",\"type\":\"bytes32\",\"internalType\":\"bytes32\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"OPTIMISM_PORTAL_SLOT\",\"inputs\":[],\"outputs\":[{\"name\":\"\",\"type\":\"bytes32\",\"internalType\":\"bytes32\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"START_BLOCK_SLOT\",\"inputs\":[],\"outputs\":[{\"name\":\"\",\"type\":\"bytes32\",\"internalType\":\"bytes32\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"UNSAFE_BLOCK_SIGNER_SLOT\",\"inputs\":[],\"outputs\":[{\"name\":\"\",\"type\":\"bytes32\",\"internalType\":\"bytes32\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"VERSION\",\"inputs\":[],\"outputs\":[{\"name\":\"\",\"type\":\"uint256\",\"internalType\":\"uint256\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"batchInbox\",\"inputs\":[],\"outputs\":[{\"name\":\"addr_\",\"type\":\"address\",\"internalType\":\"address\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"batcherHash\",\"inputs\":[],\"outputs\":[{\"name\":\"\",\"type\":\"bytes32\",\"internalType\":\"bytes32\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"disputeGameFactory\",\"inputs\":[],\"outputs\":[{\"name\":\"addr_\",\"type\":\"address\",\"internalType\":\"address\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"gasLimit\",\"inputs\":[],\"outputs\":[{\"name\":\"\",\"type\":\"uint64\",\"internalType\":\"uint64\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"gasPayingToken\",\"inputs\":[],\"outputs\":[{\"name\":\"addr_\",\"type\":\"address\",\"internalType\":\"address\"},{\"name\":\"decimals_\",\"type\":\"uint8\",\"internalType\":\"uint8\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"gasPayingTokenName\",\"inputs\":[],\"outputs\":[{\"name\":\"name_\",\"type\":\"string\",\"internalType\":\"string\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"gasPayingTokenSymbol\",\"inputs\":[],\"outputs\":[{\"name\":\"symbol_\",\"type\":\"string\",\"internalType\":\"string\"}],\"stateMutability\":\"view\"},{\"type\":\"function\",\"name\":\"initialize\",\"inputs\":[{\"name\":\"_owner\",\"type\":\"address\",\"internalType\":\"address\"},{\"name\":\"_overhead\",\"type\":\"uint256\",\"internalType\":\"uint256\"},{\"name\":\"_scalar\",\"type\":\"uint256\",\"internalType\":\"uint256\"},{\"name\":\"_batcherHash\",\"type\":\"bytes32\",\"internalType\":\"bytes32\"},{\"name\":\"_gasLimit\",\"type\":\"uint64\",\"internalType\":\"uint64\"},{\"name\":\"_unsafeBlockSigner\",\"type\":\"address\",\"internalType\":\"address\"},{\"name\":\"_config\",\"type\":\"tuple\",\"internalType\":\"structResourceMetering.ResourceConfig\",\"components\":[{\"name\":\"maxResourceLimit\",\"type\":\"uint32\",\"internalType\":\"uint32\"},{\"name\":\"elasticityMultiplier\",\"type\":\"uint8\",\"internalType\":\"uint8\"},{\"name\":\"baseFeeMaxChangeDenominator\",\"type\":\"uint8\",\"internalType\":\"uint8\"},{\"name\":\"minimumBaseFee\",\"type\":\"uint32\",\"internalType\":\"uint32\"},{\"name\":\"systemTxMaxGas\",\"type\":\"uint32\",\"internalType\":\"uint32\"},{\"name\":\"maximumBaseFee\",\"type\":\"uint128\",\"internalType\":\"uint128\"}]},{\"name\":\"_batchInbox\",\"type\":\"address\",\"internalType\":\"address\"},{\"name\":\"_addresses\",\"type\":\"tuple\",\"internalType\":\"structSystemConfig.Addresses\",\"components\":[{\"name\":\"l1CrossDomainMessenger\",\"type\":\"address\",\"internalType\":\"address\"},{\"name\":\"l1ERC721Bridge\",\"type\":\"address\",\"internalType\":\"address\"},{\"name\":\"l1StandardBridge\",\"type\":\"address\",\"internalType\":\"address\"},{\"name\":\"disputeGameFactory\",\"type\":\"address\",\"internalType\":\"address\"},{\"name\":\"optimismPortal\",\"type\":\"address\",\"internalType\":\"address\"},{\"name\":\"optimismMintableERC20Factory\",\"type\":\"a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 }

 // SystemConfigABI is the input ABI used to generate the binding from.
@@ -253,6 +253,37 @@ func (_SystemConfig *SystemConfigCallerSession) BATCHINBOXSLOT() ([32]byte, erro
 	return _SystemConfig.Contract.BATCHINBOXSLOT(&_SystemConfig.CallOpts)
 }

+// DISPUTEGAMEFACTORYSLOT is a free data retrieval call binding the contract method 0xe2a3285c.
+//
+// Solidity: function DISPUTE_GAME_FACTORY_SLOT() view returns(bytes32)
+func (_SystemConfig *SystemConfigCaller) DISPUTEGAMEFACTORYSLOT(opts *bind.CallOpts) ([32]byte, error) {
+	var out []interface{}
+	err := _SystemConfig.contract.Call(opts, &out, "DISPUTE_GAME_FACTORY_SLOT")
+
+	if err != nil {
+		return *new([32]byte), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new([32]byte)).(*[32]byte)
+
+	return out0, err
+
+}
+
+// DISPUTEGAMEFACTORYSLOT is a free data retrieval call binding the contract method 0xe2a3285c.
+//
+// Solidity: function DISPUTE_GAME_FACTORY_SLOT() view returns(bytes32)
+func (_SystemConfig *SystemConfigSession) DISPUTEGAMEFACTORYSLOT() ([32]byte, error) {
+	return _SystemConfig.Contract.DISPUTEGAMEFACTORYSLOT(&_SystemConfig.CallOpts)
+}
+
+// DISPUTEGAMEFACTORYSLOT is a free data retrieval call binding the contract method 0xe2a3285c.
+//
+// Solidity: function DISPUTE_GAME_FACTORY_SLOT() view returns(bytes32)
+func (_SystemConfig *SystemConfigCallerSession) DISPUTEGAMEFACTORYSLOT() ([32]byte, error) {
+	return _SystemConfig.Contract.DISPUTEGAMEFACTORYSLOT(&_SystemConfig.CallOpts)
+}
+
 // L1CROSSDOMAINMESSENGERSLOT is a free data retrieval call binding the contract method 0x5d73369c.
 //
 // Solidity: function L1_CROSS_DOMAIN_MESSENGER_SLOT() view returns(bytes32)
@@ -346,37 +377,6 @@ func (_SystemConfig *SystemConfigCallerSession) L1STANDARDBRIDGESLOT() ([32]byte
 	return _SystemConfig.Contract.L1STANDARDBRIDGESLOT(&_SystemConfig.CallOpts)
 }

-// L2OUTPUTORACLESLOT is a free data retrieval call binding the contract method 0x61d15768.
-//
-// Solidity: function L2_OUTPUT_ORACLE_SLOT() view returns(bytes32)
-func (_SystemConfig *SystemConfigCaller) L2OUTPUTORACLESLOT(opts *bind.CallOpts) ([32]byte, error) {
-	var out []interface{}
-	err := _SystemConfig.contract.Call(opts, &out, "L2_OUTPUT_ORACLE_SLOT")
-
-	if err != nil {
-		return *new([32]byte), err
-	}
-
-	out0 := *abi.ConvertType(out[0], new([32]byte)).(*[32]byte)
-
-	return out0, err
-
-}
-
-// L2OUTPUTORACLESLOT is a free data retrieval call binding the contract method 0x61d15768.
-//
-// Solidity: function L2_OUTPUT_ORACLE_SLOT() view returns(bytes32)
-func (_SystemConfig *SystemConfigSession) L2OUTPUTORACLESLOT() ([32]byte, error) {
-	return _SystemConfig.Contract.L2OUTPUTORACLESLOT(&_SystemConfig.CallOpts)
-}
-
-// L2OUTPUTORACLESLOT is a free data retrieval call binding the contract method 0x61d15768.
-//
-// Solidity: function L2_OUTPUT_ORACLE_SLOT() view returns(bytes32)
-func (_SystemConfig *SystemConfigCallerSession) L2OUTPUTORACLESLOT() ([32]byte, error) {
-	return _SystemConfig.Contract.L2OUTPUTORACLESLOT(&_SystemConfig.CallOpts)
-}
-
 // OPTIMISMMINTABLEERC20FACTORYSLOT is a free data retrieval call binding the contract method 0x06c92657.
 //
 // Solidity: function OPTIMISM_MINTABLE_ERC20_FACTORY_SLOT() view returns(bytes32)
@@ -594,6 +594,37 @@ func (_SystemConfig *SystemConfigCallerSession) BatcherHash() ([32]byte, error)
 	return _SystemConfig.Contract.BatcherHash(&_SystemConfig.CallOpts)
 }

+// DisputeGameFactory is a free data retrieval call binding the contract method 0xf2b4e617.
+//
+// Solidity: function disputeGameFactory() view returns(address addr_)
+func (_SystemConfig *SystemConfigCaller) DisputeGameFactory(opts *bind.CallOpts) (common.Address, error) {
+	var out []interface{}
+	err := _SystemConfig.contract.Call(opts, &out, "disputeGameFactory")
+
+	if err != nil {
+		return *new(common.Address), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(common.Address)).(*common.Address)
+
+	return out0, err
+
+}
+
+// DisputeGameFactory is a free data retrieval call binding the contract method 0xf2b4e617.
+//
+// Solidity: function disputeGameFactory() view returns(address addr_)
+func (_SystemConfig *SystemConfigSession) DisputeGameFactory() (common.Address, error) {
+	return _SystemConfig.Contract.DisputeGameFactory(&_SystemConfig.CallOpts)
+}
+
+// DisputeGameFactory is a free data retrieval call binding the contract method 0xf2b4e617.
+//
+// Solidity: function disputeGameFactory() view returns(address addr_)
+func (_SystemConfig *SystemConfigCallerSession) DisputeGameFactory() (common.Address, error) {
+	return _SystemConfig.Contract.DisputeGameFactory(&_SystemConfig.CallOpts)
+}
+
 // GasLimit is a free data retrieval call binding the contract method 0xf68016b7.
 //
 // Solidity: function gasLimit() view returns(uint64)
@@ -856,37 +887,6 @@ func (_SystemConfig *SystemConfigCallerSession) L1StandardBridge() (common.Addre
 	return _SystemConfig.Contract.L1StandardBridge(&_SystemConfig.CallOpts)
 }

-// L2OutputOracle is a free data retrieval call binding the contract method 0x4d9f1559.
-//
-// Solidity: function l2OutputOracle() view returns(address addr_)
-func (_SystemConfig *SystemConfigCaller) L2OutputOracle(opts *bind.CallOpts) (common.Address, error) {
-	var out []interface{}
-	err := _SystemConfig.contract.Call(opts, &out, "l2OutputOracle")
-
-	if err != nil {
-		return *new(common.Address), err
-	}
-
-	out0 := *abi.ConvertType(out[0], new(common.Address)).(*common.Address)
-
-	return out0, err
-
-}
-
-// L2OutputOracle is a free data retrieval call binding the contract method 0x4d9f1559.
-//
-// Solidity: function l2OutputOracle() view returns(address addr_)
-func (_SystemConfig *SystemConfigSession) L2OutputOracle() (common.Address, error) {
-	return _SystemConfig.Contract.L2OutputOracle(&_SystemConfig.CallOpts)
-}
-
-// L2OutputOracle is a free data retrieval call binding the contract method 0x4d9f1559.
-//
-// Solidity: function l2OutputOracle() view returns(address addr_)
-func (_SystemConfig *SystemConfigCallerSession) L2OutputOracle() (common.Address, error) {
-	return _SystemConfig.Contract.L2OutputOracle(&_SystemConfig.CallOpts)
-}
-
 // MinimumGasLimit is a free data retrieval call binding the contract method 0x4add321d.
 //
 // Solidity: function minimumGasLimit() view returns(uint64)

--- a/op-chain-ops/upgrades/l1.go
+++ b/op-chain-ops/upgrades/l1.go
@@ -757,9 +757,9 @@ func SystemConfig(batch *safe.Batch, implementations superchain.ImplementationLi
 			L1CrossDomainMessenger:       common.Address(list.L1CrossDomainMessengerProxy),
 			L1ERC721Bridge:               common.Address(list.L1ERC721BridgeProxy),
 			L1StandardBridge:             common.Address(list.L1StandardBridgeProxy),
-			L2OutputOracle:               common.Address(list.L2OutputOracleProxy),
 			OptimismPortal:               common.Address(list.OptimismPortalProxy),
 			OptimismMintableERC20Factory: common.Address(list.OptimismMintableERC20FactoryProxy),
+			GasPayingToken:               common.Address{},
 		},
 	)
 	if err != nil {

--- a/op-e2e/custom_gas_token_test.go
+++ b/op-e2e/custom_gas_token_test.go
+package op_e2e
+
+import (
+	"context"
+	"fmt"
+	"math/big"
+	"testing"
+
+	"github.com/ethereum-optimism/optimism/op-bindings/bindings"
+	"github.com/ethereum-optimism/optimism/op-bindings/predeploys"
+	"github.com/ethereum-optimism/optimism/op-e2e/e2eutils"
+	"github.com/ethereum-optimism/optimism/op-e2e/e2eutils/receipts"
+	"github.com/ethereum-optimism/optimism/op-e2e/e2eutils/wait"
+	"github.com/ethereum-optimism/optimism/op-node/rollup/derive"
+	"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/ethclient"
+	"github.com/stretchr/testify/require"
+)
+
+func TestCustomGasToken(t *testing.T) {
+	InitParallel(t, SkipOnFPAC) // Custom Gas Token feature is not yet compatible with FPAC
+
+	cfg := DefaultSystemConfig(t)
+
+	sys, err := cfg.Start(t)
+	require.NoError(t, err, "Error starting up system")
+	defer sys.Close()
+	l1Client := sys.Clients["l1"]
+	l2Client := sys.Clients["sequencer"]
+
+	aliceOpts, err := bind.NewKeyedTransactorWithChainID(cfg.Secrets.Alice, cfg.L1ChainIDBig())
+	require.NoError(t, err)
+
+	// Deploy WETH9, we'll use this as our custom gas token for the purpose of the test
+	weth9Address, tx, weth9, err := bindings.DeployWETH9(aliceOpts, l1Client)
+	require.NoError(t, err)
+	_, err = wait.ForReceiptOK(context.Background(), l1Client, tx.Hash())
+	require.NoError(t, err)
+
+	// setup expectations using custom gas token
+	type Expectations struct {
+		tokenAddress  common.Address
+		tokenName     string
+		tokenSymbol   string
+		tokenDecimals uint8
+	}
+	disabledExpectations := Expectations{
+		common.HexToAddress("0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE"),
+		"Ether",
+		"ETH",
+		uint8(18),
+	}
+	enabledExpectations := Expectations{}
+	enabledExpectations.tokenAddress = weth9Address
+	enabledExpectations.tokenName, err = weth9.Name(&bind.CallOpts{})
+	require.NoError(t, err)
+	enabledExpectations.tokenSymbol, err = weth9.Symbol(&bind.CallOpts{})
+	require.NoError(t, err)
+	enabledExpectations.tokenDecimals, err = weth9.Decimals(&bind.CallOpts{})
+	require.NoError(t, err)
+
+	// Get some WETH
+	aliceOpts.Value = big.NewInt(10_000_000)
+	tx, err = weth9.Deposit(aliceOpts)
+	waitForTx(t, tx, err, l1Client)
+	aliceOpts.Value = nil
+	newBalance, err := weth9.BalanceOf(&bind.CallOpts{}, aliceOpts.From)
+	require.NoError(t, err)
+	require.Equal(t, newBalance, big.NewInt(10_000_000))
+
+	// Function to prepare and make call to depositERC20Transaction and make
+	// appropriate assertions dependent on whether custom gas tokens have been enabled or not.
+	checkDeposit := func(t *testing.T, enabled bool) {
+		// Set amount of WETH9 to bridge to the recipient on L2
+		amountToBridge := big.NewInt(10)
+		recipient := common.HexToAddress("0xbeefdead")
+
+		// Approve OptimismPortal
+		tx, err = weth9.Approve(aliceOpts, cfg.L1Deployments.OptimismPortalProxy, amountToBridge)
+		waitForTx(t, tx, err, l1Client)
+
+		// Get recipient L2 balance before bridging
+		previousL2Balance, err := l2Client.BalanceAt(context.Background(), recipient, nil)
+		require.NoError(t, err)
+
+		// Bridge the tokens
+		optimismPortal, err := bindings.NewOptimismPortal(cfg.L1Deployments.OptimismPortalProxy, l1Client)
+		require.NoError(t, err)
+		tx, err = optimismPortal.DepositERC20Transaction(aliceOpts,
+			recipient,
+			amountToBridge,
+			amountToBridge,
+			50_0000, // _gasLimit
+			false,
+			[]byte{},
+		)
+		if enabled {
+			require.NoError(t, err)
+			receipt, err := wait.ForReceiptOK(context.Background(), l1Client, tx.Hash())
+			require.NoError(t, err)
+
+			// compute the deposit transaction hash + poll for it
+			depositEvent, err := receipts.FindLog(receipt.Logs, optimismPortal.ParseTransactionDeposited)
+			require.NoError(t, err, "Should emit deposit event")
+			depositTx, err := derive.UnmarshalDepositLogEvent(&depositEvent.Raw)
+			require.NoError(t, err)
+			_, err = wait.ForReceiptOK(context.Background(), l2Client, types.NewTx(depositTx).Hash())
+			require.NoError(t, err)
+
+			// check for balance increase on L2
+			newL2Balance, err := l2Client.BalanceAt(context.Background(), recipient, nil)
+			require.NoError(t, err)
+			l2BalanceIncrease := big.NewInt(0).Sub(newL2Balance, previousL2Balance)
+			require.Equal(t, amountToBridge, l2BalanceIncrease)
+		} else {
+			require.Error(t, err)
+		}
+	}
+
+	// Function to prepare and execute withdrawal flow for CGTs
+	// and assert token balance is increased on L1.
+	checkWithdrawal := func(t *testing.T) {
+
+		l2Seq := l2Client
+		l2Verif := sys.Clients["verifier"]
+		fromAddr := aliceOpts.From
+		ethPrivKey := cfg.Secrets.Alice
+
+		// Start L2 balance for withdrawal
+		startBalanceBeforeWithdrawal, err := l2Seq.BalanceAt(context.Background(), fromAddr, nil)
+		require.NoError(t, err)
+
+		withdrawAmount := big.NewInt(5)
+		tx, receipt := SendWithdrawal(t, cfg, l2Seq, cfg.Secrets.Alice, func(opts *WithdrawalTxOpts) {
+			opts.Value = withdrawAmount
+			opts.VerifyOnClients(l2Verif)
+		})
+
+		// Verify L2 balance after withdrawal
+		header, err := l2Verif.HeaderByNumber(context.Background(), receipt.BlockNumber)
+		require.NoError(t, err)
+
+		endBalanceAfterWithdrawal, err := wait.ForBalanceChange(context.Background(), l2Seq, fromAddr, startBalanceBeforeWithdrawal)
+		require.NoError(t, err)
+
+		// Take fee into account
+		diff := new(big.Int).Sub(startBalanceBeforeWithdrawal, endBalanceAfterWithdrawal)
+		fees := calcGasFees(receipt.GasUsed, tx.GasTipCap(), tx.GasFeeCap(), header.BaseFee)
+		fees = fees.Add(fees, receipt.L1Fee)
+		diff = diff.Sub(diff, fees)
+		require.Equal(t, withdrawAmount, diff)
+
+		// Take start token balance on L1
+		startTokenBalanceBeforeFinalize, err := weth9.BalanceOf(&bind.CallOpts{}, fromAddr)
+		require.NoError(t, err)
+
+		startETHBalanceBeforeFinalize, err := l1Client.BalanceAt(context.Background(), fromAddr, nil)
+		require.NoError(t, err)
+
+		proveReceipt, finalizeReceipt, resolveClaimReceipt, resolveReceipt := ProveAndFinalizeWithdrawal(t, cfg, sys, "verifier", ethPrivKey, receipt)
+
+		// Verify L1 ETH balance change
+		proveFee := new(big.Int).Mul(new(big.Int).SetUint64(proveReceipt.GasUsed), proveReceipt.EffectiveGasPrice)
+		finalizeFee := new(big.Int).Mul(new(big.Int).SetUint64(finalizeReceipt.GasUsed), finalizeReceipt.EffectiveGasPrice)
+		fees = new(big.Int).Add(proveFee, finalizeFee)
+		if e2eutils.UseFPAC() {
+			resolveClaimFee := new(big.Int).Mul(new(big.Int).SetUint64(resolveClaimReceipt.GasUsed), resolveClaimReceipt.EffectiveGasPrice)
+			resolveFee := new(big.Int).Mul(new(big.Int).SetUint64(resolveReceipt.GasUsed), resolveReceipt.EffectiveGasPrice)
+			fees = new(big.Int).Add(fees, resolveClaimFee)
+			fees = new(big.Int).Add(fees, resolveFee)
+		}
+
+		// Verify L1ETHBalance after withdrawal
+		// On CGT chains, the only change in ETH balance from a withdrawal
+		// is a decrease to pay for gas
+		endETHBalanceAfterFinalize, err := l1Client.BalanceAt(context.Background(), fromAddr, nil)
+		require.NoError(t, err)
+		diff = new(big.Int).Sub(endETHBalanceAfterFinalize, startETHBalanceBeforeFinalize)
+		require.Equal(t, new(big.Int).Sub(big.NewInt(0), fees), diff)
+
+		// Verify token balance after withdrawal
+		// L1 Fees are paid in ETH, and
+		// withdrawal is of a Custom Gas Token, so we do not subtract l1 fees from expected balance change
+		// as we would if ETH was the gas paying token
+		endTokenBalanceAfterFinalize, err := weth9.BalanceOf(&bind.CallOpts{}, fromAddr)
+		require.NoError(t, err)
+		diff = new(big.Int).Sub(endTokenBalanceAfterFinalize, startTokenBalanceBeforeFinalize)
+		require.Equal(t, withdrawAmount, diff)
+	}
+
+	checkL1TokenNameAndSymbol := func(t *testing.T, enabled bool) {
+		systemConfig, err := bindings.NewSystemConfig(cfg.L1Deployments.SystemConfigProxy, l1Client)
+		require.NoError(t, err)
+
+		token, err := systemConfig.GasPayingToken(&bind.CallOpts{})
+		require.NoError(t, err)
+
+		name, err := systemConfig.GasPayingTokenName(&bind.CallOpts{})
+		require.NoError(t, err)
+
+		symbol, err := systemConfig.GasPayingTokenSymbol(&bind.CallOpts{})
+		require.NoError(t, err)
+
+		if enabled {
+			require.Equal(t, enabledExpectations.tokenAddress, token.Addr)
+			require.Equal(t, enabledExpectations.tokenDecimals, token.Decimals)
+			require.Equal(t, enabledExpectations.tokenName, name)
+			require.Equal(t, enabledExpectations.tokenSymbol, symbol)
+		} else {
+			require.Equal(t, disabledExpectations.tokenAddress, token.Addr)
+			require.Equal(t, disabledExpectations.tokenDecimals, token.Decimals)
+			require.Equal(t, disabledExpectations.tokenName, name)
+			require.Equal(t, disabledExpectations.tokenSymbol, symbol)
+		}
+	}
+
+	checkL2TokenNameAndSymbol := func(t *testing.T, enabled bool) {
+		l1Block, err := bindings.NewL1Block(predeploys.L1BlockAddr, l2Client)
+		require.NoError(t, err)
+
+		token, err := l1Block.GasPayingToken(&bind.CallOpts{})
+		require.NoError(t, err)
+
+		name, err := l1Block.GasPayingTokenName(&bind.CallOpts{})
+		require.NoError(t, err)
+
+		symbol, err := l1Block.GasPayingTokenSymbol(&bind.CallOpts{})
+		require.NoError(t, err)
+
+		if enabled {
+			require.Equal(t, enabledExpectations.tokenAddress, token.Addr)
+			require.Equal(t, enabledExpectations.tokenDecimals, token.Decimals)
+			require.Equal(t, enabledExpectations.tokenName, name)
+			require.Equal(t, enabledExpectations.tokenSymbol, symbol)
+		} else {
+			require.Equal(t, disabledExpectations.tokenAddress, token.Addr)
+			require.Equal(t, disabledExpectations.tokenDecimals, token.Decimals)
+			require.Equal(t, disabledExpectations.tokenName, name)
+			require.Equal(t, disabledExpectations.tokenSymbol, symbol)
+		}
+	}
+
+	checkWETHTokenNameAndSymbol := func(t *testing.T, enabled bool) {
+		// Check name and symbol in WETH predeploy
+		weth, err := bindings.NewWETH(predeploys.WETHAddr, l2Client)
+		require.NoError(t, err)
+
+		name, err := weth.Name(&bind.CallOpts{})
+		require.NoError(t, err)
+
+		symbol, err := weth.Symbol(&bind.CallOpts{})
+		require.NoError(t, err)
+
+		if enabled {
+			require.Equal(t, "Wrapped "+enabledExpectations.tokenName, name)
+			require.Equal(t, "W"+enabledExpectations.tokenSymbol, symbol)
+		} else {
+			require.Equal(t, "Wrapped "+disabledExpectations.tokenName, name)
+			require.Equal(t, "W"+disabledExpectations.tokenSymbol, symbol)
+		}
+	}
+
+	// Begin by testing behaviour when CGT feature is not enabled
+	enabled := false
+	checkDeposit(t, enabled)
+	checkL1TokenNameAndSymbol(t, enabled)
+	checkL2TokenNameAndSymbol(t, enabled)
+	checkWETHTokenNameAndSymbol(t, enabled)
+
+	// Activate custom gas token feature (devnet does not have this activated at genesis)
+	setCustomGasToken(t, cfg, sys, weth9Address)
+
+	// Now test behaviour given CGT feature is enabled
+	enabled = true
+	checkDeposit(t, enabled)
+	checkWithdrawal(t)
+	checkL1TokenNameAndSymbol(t, enabled)
+	checkL2TokenNameAndSymbol(t, enabled)
+	checkWETHTokenNameAndSymbol(t, enabled)
+}
+
+// callViaSafe will use the Safe smart account at safeAddress to send a transaction to target using the provided data. The transaction signature is constructed from
+// the supplied opts.
+func callViaSafe(opts *bind.TransactOpts, client *ethclient.Client, safeAddress common.Address, target common.Address, data []byte) (*types.Transaction, error) {
+	signature := [65]byte{}
+	copy(signature[12:], opts.From[:])
+	signature[64] = uint8(1)
+
+	safe, err := bindings.NewSafe(safeAddress, client)
+	if err != nil {
+		return nil, err
+	}
+
+	owners, err := safe.GetOwners(&bind.CallOpts{})
+	if err != nil {
+		return nil, err
+	}
+
+	isOwner, err := safe.IsOwner(&bind.CallOpts{}, opts.From)
+	if err != nil {
+		return nil, err
+	}
+	if !isOwner {
+		return nil, fmt.Errorf("address %s is not in owners list %s", opts.From, owners)
+	}
+
+	return safe.ExecTransaction(opts, target, big.NewInt(0), data, 0, big.NewInt(0), big.NewInt(0), big.NewInt(0), common.Address{}, common.Address{}, signature[:])
+}
+
+// setCustomGasToeken enables the Custom Gas Token feature on a chain where it wasn't enabled at genesis.
+// It reads existing parameters from the SystemConfig contract, inserts the supplied cgtAddress and reinitializes that contract.
+// To do this it uses the ProxyAdmin and StorageSetter from the supplied cfg.
+func setCustomGasToken(t *testing.T, cfg SystemConfig, sys *System, cgtAddress common.Address) {
+	l1Client := sys.Clients["l1"]
+	deployerOpts, err := bind.NewKeyedTransactorWithChainID(cfg.Secrets.Deployer, cfg.L1ChainIDBig())
+	require.NoError(t, err)
+
+	// Bind a SystemConfig at the SystemConfigProxy address
+	systemConfig, err := bindings.NewSystemConfig(cfg.L1Deployments.SystemConfigProxy, l1Client)
+	require.NoError(t, err)
+
+	// Get existing parameters from SystemConfigProxy contract
+	owner, err := systemConfig.Owner(&bind.CallOpts{})
+	require.NoError(t, err)
+	overhead, err := systemConfig.Overhead(&bind.CallOpts{})
+	require.NoError(t, err)
+	scalar, err := systemConfig.Scalar(&bind.CallOpts{})
+	require.NoError(t, err)
+	batcherHash, err := systemConfig.BatcherHash(&bind.CallOpts{})
+	require.NoError(t, err)
+	gasLimit, err := systemConfig.GasLimit(&bind.CallOpts{})
+	require.NoError(t, err)
+	unsafeBlockSigner, err := systemConfig.UnsafeBlockSigner(&bind.CallOpts{})
+	require.NoError(t, err)
+	resourceConfig, err := systemConfig.ResourceConfig(&bind.CallOpts{})
+	require.NoError(t, err)
+	batchInbox, err := systemConfig.BatchInbox(&bind.CallOpts{})
+	require.NoError(t, err)
+	addresses := bindings.SystemConfigAddresses{}
+	addresses.L1CrossDomainMessenger, err = systemConfig.L1CrossDomainMessenger(&bind.CallOpts{})
+	require.NoError(t, err)
+	addresses.L1ERC721Bridge, err = systemConfig.L1ERC721Bridge(&bind.CallOpts{})
+	require.NoError(t, err)
+	addresses.L1StandardBridge, err = systemConfig.L1StandardBridge(&bind.CallOpts{})
+	require.NoError(t, err)
+	addresses.DisputeGameFactory, err = systemConfig.DisputeGameFactory(&bind.CallOpts{})
+	require.NoError(t, err)
+	addresses.OptimismPortal, err = systemConfig.OptimismPortal(&bind.CallOpts{})
+	require.NoError(t, err)
+	addresses.OptimismMintableERC20Factory, err = systemConfig.OptimismMintableERC20Factory(&bind.CallOpts{})
+	require.NoError(t, err)
+
+	// Queue up custom gas token address ready for reinitialization
+	addresses.GasPayingToken = cgtAddress
+
+	// Bind a ProxyAdmin to the ProxyAdmin address
+	proxyAdmin, err := bindings.NewProxyAdmin(cfg.L1Deployments.ProxyAdmin, l1Client)
+	require.NoError(t, err)
+
+	// Compute Proxy Admin Owner (this is a SAFE with 1 owner)
+	proxyAdminOwner, err := proxyAdmin.Owner(&bind.CallOpts{})
+	require.NoError(t, err)
+
+	// Deploy a new StorageSetter contract
+	storageSetterAddr, tx, _, err := bindings.DeployStorageSetter(deployerOpts, l1Client)
+	waitForTx(t, tx, err, l1Client)
+
+	// Set up a signer which controls the Proxy Admin Owner SAFE
+	safeOwnerOpts, err := bind.NewKeyedTransactorWithChainID(cfg.Secrets.Deployer, cfg.L1ChainIDBig())
+	require.NoError(t, err)
+
+	// Encode calldata for upgrading SystemConfigProxy to the StorageSetter implementation
+	proxyAdminABI, err := bindings.ProxyAdminMetaData.GetAbi()
+	require.NoError(t, err)
+	encodedUpgradeCall, err := proxyAdminABI.Pack("upgrade",
+		cfg.L1Deployments.SystemConfigProxy, storageSetterAddr)
+	require.NoError(t, err)
+
+	// Execute the upgrade SystemConfigProxy -> StorageSetter
+	tx, err = callViaSafe(safeOwnerOpts, l1Client, proxyAdminOwner, cfg.L1Deployments.ProxyAdmin, encodedUpgradeCall)
+	waitForTx(t, tx, err, l1Client)
+
+	// Bind a StorageSetter to the SystemConfigProxy address
+	storageSetter, err := bindings.NewStorageSetter(cfg.L1Deployments.SystemConfigProxy, l1Client)
+	require.NoError(t, err)
+
+	// Use StorageSetter to clear out "initialize" slot
+	tx, err = storageSetter.SetBytes320(deployerOpts, [32]byte{0}, [32]byte{0})
+	waitForTx(t, tx, err, l1Client)
+
+	// Sanity check previous step worked
+	currentSlotValue, err := storageSetter.GetBytes32(&bind.CallOpts{}, [32]byte{0})
+	require.NoError(t, err)
+	require.Equal(t, currentSlotValue, [32]byte{0})
+
+	// Prepare calldata for SystemConfigProxy -> SystemConfig upgrade
+	encodedUpgradeCall, err = proxyAdminABI.Pack("upgrade",
+		cfg.L1Deployments.SystemConfigProxy, cfg.L1Deployments.SystemConfig)
+	require.NoError(t, err)
+
+	// Execute SystemConfigProxy -> SystemConfig upgrade
+	tx, err = callViaSafe(safeOwnerOpts, l1Client, proxyAdminOwner, cfg.L1Deployments.ProxyAdmin, encodedUpgradeCall)
+	waitForTx(t, tx, err, l1Client)
+
+	// Reinitialise with existing initializer values but with custom gas token set
+	tx, err = systemConfig.Initialize(deployerOpts, owner,
+		overhead,
+		scalar,
+		batcherHash,
+		gasLimit,
+		unsafeBlockSigner,
+		resourceConfig,
+		batchInbox,
+		addresses)
+	require.NoError(t, err)
+	receipt, err := wait.ForReceiptOK(context.Background(), l1Client, tx.Hash())
+	require.NoError(t, err)
+
+	// Read Custom Gas Token and check it has been set properly
+	gpt, err := systemConfig.GasPayingToken(&bind.CallOpts{})
+	require.NoError(t, err)
+	require.Equal(t, cgtAddress, gpt.Addr)
+
+	optimismPortal, err := bindings.NewOptimismPortal(cfg.L1Deployments.OptimismPortalProxy, l1Client)
+	require.NoError(t, err)
+
+	depositEvent, err := receipts.FindLog(receipt.Logs, optimismPortal.ParseTransactionDeposited)
+	require.NoError(t, err, "Should emit deposit event")
+	depositTx, err := derive.UnmarshalDepositLogEvent(&depositEvent.Raw)
+
+	require.NoError(t, err)
+	l2Client := sys.Clients["sequencer"]
+	receipt, err = wait.ForReceiptOK(context.Background(), l2Client, types.NewTx(depositTx).Hash())
+	require.NoError(t, err)
+
+	l1Block, err := bindings.NewL1Block(predeploys.L1BlockAddr, l2Client)
+	require.NoError(t, err)
+	_, err = receipts.FindLog(receipt.Logs, l1Block.ParseGasPayingTokenSet)
+	require.NoError(t, err)
+}
+
+// waitForTx is a thing wrapper around wait.ForReceiptOK which asserts on there being no errors.
+func waitForTx(t *testing.T, tx *types.Transaction, err error, client *ethclient.Client) {
+	require.NoError(t, err)
+	_, err = wait.ForReceiptOK(context.Background(), client, tx.Hash())
+	require.NoError(t, err)
+}