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package batching
import (
"fmt"
"math/big"
"github.com/ethereum-optimism/optimism/op-service/txmgr"
"github.com/ethereum/go-ethereum"
"github.com/ethereum/go-ethereum/accounts/abi"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
)
type BoundContract struct {
abi *abi.ABI
addr common.Address
}
func NewBoundContract(abi *abi.ABI, addr common.Address) *BoundContract {
return &BoundContract{
abi: abi,
addr: addr,
}
}
func (b *BoundContract) Call(method string, args ...interface{}) *ContractCall {
return NewContractCall(b.abi, b.addr, method, args...)
}
type ContractCall struct {
Abi *abi.ABI
Addr common.Address
Method string
Args []interface{}
}
func NewContractCall(abi *abi.ABI, addr common.Address, method string, args ...interface{}) *ContractCall {
return &ContractCall{
Abi: abi,
Addr: addr,
Method: method,
Args: args,
}
}
func (c *ContractCall) Pack() ([]byte, error) {
return c.Abi.Pack(c.Method, c.Args...)
}
func (c *ContractCall) ToCallArgs() (interface{}, error) {
data, err := c.Pack()
if err != nil {
return nil, fmt.Errorf("failed to pack arguments: %w", err)
}
msg := ethereum.CallMsg{
To: &c.Addr,
Data: data,
}
return toCallArg(msg), nil
}
func (c *ContractCall) Unpack(hex hexutil.Bytes) (*CallResult, error) {
out, err := c.Abi.Unpack(c.Method, hex)
if err != nil {
return nil, fmt.Errorf("failed to unpack data: %w", err)
}
return &CallResult{out: out}, nil
}
func toCallArg(msg ethereum.CallMsg) interface{} {
arg := map[string]interface{}{
"from": msg.From,
"to": msg.To,
}
if len(msg.Data) > 0 {
arg["input"] = hexutil.Bytes(msg.Data)
}
if msg.Value != nil {
arg["value"] = (*hexutil.Big)(msg.Value)
}
if msg.Gas != 0 {
arg["gas"] = hexutil.Uint64(msg.Gas)
}
if msg.GasPrice != nil {
arg["gasPrice"] = (*hexutil.Big)(msg.GasPrice)
}
return arg
}
func (c *ContractCall) ToTxCandidate() (txmgr.TxCandidate, error) {
data, err := c.Pack()
if err != nil {
return txmgr.TxCandidate{}, fmt.Errorf("failed to pack arguments: %w", err)
}
return txmgr.TxCandidate{
TxData: data,
To: &c.Addr,
}, nil
}
type CallResult struct {
out []interface{}
}
func (c *CallResult) GetUint8(i int) uint8 {
return *abi.ConvertType(c.out[i], new(uint8)).(*uint8)
}
func (c *CallResult) GetUint32(i int) uint32 {
return *abi.ConvertType(c.out[i], new(uint32)).(*uint32)
}
func (c *CallResult) GetUint64(i int) uint64 {
return *abi.ConvertType(c.out[i], new(uint64)).(*uint64)
}
func (c *CallResult) GetBool(i int) bool {
return *abi.ConvertType(c.out[i], new(bool)).(*bool)
}
func (c *CallResult) GetHash(i int) common.Hash {
return *abi.ConvertType(c.out[i], new([32]byte)).(*[32]byte)
}
func (c *CallResult) GetAddress(i int) common.Address {
return *abi.ConvertType(c.out[i], new([20]byte)).(*[20]byte)
}
func (c *CallResult) GetBigInt(i int) *big.Int {
return *abi.ConvertType(c.out[i], new(*big.Int)).(**big.Int)
}
func (c *CallResult) GetStruct(i int, target interface{}) {
abi.ConvertType(c.out[i], target)
}