ipld-eth-server/pkg/eth/transaction_arguments.go

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package eth
import (
"errors"
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/common/math"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/sirupsen/logrus"
)
// TransactionArgs represents the arguments to construct a new transaction
// or a message call.
type TransactionArgs struct {
From *common.Address `json:"from"`
To *common.Address `json:"to"`
Gas *hexutil.Uint64 `json:"gas"`
GasPrice *hexutil.Big `json:"gasPrice"`
MaxFeePerGas *hexutil.Big `json:"maxFeePerGas"`
MaxPriorityFeePerGas *hexutil.Big `json:"maxPriorityFeePerGas"`
Value *hexutil.Big `json:"value"`
Nonce *hexutil.Uint64 `json:"nonce"`
// We accept "data" and "input" for backwards-compatibility reasons.
// "input" is the newer name and should be preferred by clients.
// Issue detail: https://github.com/ethereum/go-ethereum/issues/15628
Data *hexutil.Bytes `json:"data"`
Input *hexutil.Bytes `json:"input"`
// Introduced by AccessListTxType transaction.
AccessList *types.AccessList `json:"accessList,omitempty"`
ChainID *hexutil.Big `json:"chainId,omitempty"`
}
// from retrieves the transaction sender address.
func (args *TransactionArgs) from() common.Address {
if args.From == nil {
return common.Address{}
}
return *args.From
}
// data retrieves the transaction calldata. Input field is preferred.
func (args *TransactionArgs) data() []byte {
if args.Input != nil {
return *args.Input
}
if args.Data != nil {
return *args.Data
}
return nil
}
// ToMessage converts the transaction arguments to the Message type used by the
// core evm. This method is used in calls and traces that do not require a real
// live transaction.
func (args *TransactionArgs) ToMessage(globalGasCap uint64, baseFee *big.Int) (*core.Message, error) {
// Reject invalid combinations of pre- and post-1559 fee styles
if args.GasPrice != nil && (args.MaxFeePerGas != nil || args.MaxPriorityFeePerGas != nil) {
return nil, errors.New("both gasPrice and (maxFeePerGas or maxPriorityFeePerGas) specified")
}
// Set sender address or use zero address if none specified.
addr := args.from()
// Set default gas & gas price if none were set
gas := globalGasCap
if gas == 0 {
gas = uint64(math.MaxUint64 / 2)
}
if args.Gas != nil {
gas = uint64(*args.Gas)
}
if globalGasCap != 0 && globalGasCap < gas {
logrus.Warn("Caller gas above allowance, capping", "requested", gas, "cap", globalGasCap)
gas = globalGasCap
}
var (
gasPrice *big.Int
gasFeeCap *big.Int
gasTipCap *big.Int
)
if baseFee == nil {
// If there's no basefee, then it must be a non-1559 execution
gasPrice = new(big.Int)
if args.GasPrice != nil {
gasPrice = args.GasPrice.ToInt()
}
gasFeeCap, gasTipCap = gasPrice, gasPrice
} else {
// A basefee is provided, necessitating 1559-type execution
if args.GasPrice != nil {
// User specified the legacy gas field, convert to 1559 gas typing
gasPrice = args.GasPrice.ToInt()
gasFeeCap, gasTipCap = gasPrice, gasPrice
} else {
// User specified 1559 gas fields (or none), use those
gasFeeCap = new(big.Int)
if args.MaxFeePerGas != nil {
gasFeeCap = args.MaxFeePerGas.ToInt()
}
gasTipCap = new(big.Int)
if args.MaxPriorityFeePerGas != nil {
gasTipCap = args.MaxPriorityFeePerGas.ToInt()
}
// Backfill the legacy gasPrice for EVM execution, unless we're all zeroes
gasPrice = new(big.Int)
if gasFeeCap.BitLen() > 0 || gasTipCap.BitLen() > 0 {
gasPrice = math.BigMin(new(big.Int).Add(gasTipCap, baseFee), gasFeeCap)
}
}
}
value := new(big.Int)
if args.Value != nil {
value = args.Value.ToInt()
}
data := args.data()
var accessList types.AccessList
if args.AccessList != nil {
accessList = *args.AccessList
}
msg := &core.Message{
From: addr,
To: args.To,
Value: value,
GasLimit: gas,
GasPrice: gasPrice,
GasFeeCap: gasFeeCap,
GasTipCap: gasTipCap,
Data: data,
AccessList: accessList,
SkipAccountChecks: true,
}
return msg, nil
}