ToMessage method for transaction_arguments
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@ -1,9 +1,15 @@
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package eth
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import (
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"errors"
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"math/big"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/hexutil"
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"github.com/ethereum/go-ethereum/common/math"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/sirupsen/logrus"
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)
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// TransactionArgs represents the arguments to construct a new transaction
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@ -47,3 +53,85 @@ func (args *TransactionArgs) data() []byte {
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}
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return nil
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}
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// ToMessage converts the transaction arguments to the Message type used by the
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// core evm. This method is used in calls and traces that do not require a real
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// live transaction.
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func (args *TransactionArgs) ToMessage(globalGasCap uint64, baseFee *big.Int) (*core.Message, error) {
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// Reject invalid combinations of pre- and post-1559 fee styles
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if args.GasPrice != nil && (args.MaxFeePerGas != nil || args.MaxPriorityFeePerGas != nil) {
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return nil, errors.New("both gasPrice and (maxFeePerGas or maxPriorityFeePerGas) specified")
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}
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// Set sender address or use zero address if none specified.
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addr := args.from()
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// Set default gas & gas price if none were set
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gas := globalGasCap
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if gas == 0 {
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gas = uint64(math.MaxUint64 / 2)
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}
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if args.Gas != nil {
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gas = uint64(*args.Gas)
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}
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if globalGasCap != 0 && globalGasCap < gas {
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logrus.Warn("Caller gas above allowance, capping", "requested", gas, "cap", globalGasCap)
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gas = globalGasCap
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}
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var (
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gasPrice *big.Int
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gasFeeCap *big.Int
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gasTipCap *big.Int
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)
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if baseFee == nil {
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// If there's no basefee, then it must be a non-1559 execution
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gasPrice = new(big.Int)
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if args.GasPrice != nil {
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gasPrice = args.GasPrice.ToInt()
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}
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gasFeeCap, gasTipCap = gasPrice, gasPrice
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} else {
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// A basefee is provided, necessitating 1559-type execution
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if args.GasPrice != nil {
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// User specified the legacy gas field, convert to 1559 gas typing
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gasPrice = args.GasPrice.ToInt()
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gasFeeCap, gasTipCap = gasPrice, gasPrice
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} else {
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// User specified 1559 gas fields (or none), use those
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gasFeeCap = new(big.Int)
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if args.MaxFeePerGas != nil {
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gasFeeCap = args.MaxFeePerGas.ToInt()
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}
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gasTipCap = new(big.Int)
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if args.MaxPriorityFeePerGas != nil {
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gasTipCap = args.MaxPriorityFeePerGas.ToInt()
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}
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// Backfill the legacy gasPrice for EVM execution, unless we're all zeroes
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gasPrice = new(big.Int)
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if gasFeeCap.BitLen() > 0 || gasTipCap.BitLen() > 0 {
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gasPrice = math.BigMin(new(big.Int).Add(gasTipCap, baseFee), gasFeeCap)
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}
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}
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}
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value := new(big.Int)
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if args.Value != nil {
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value = args.Value.ToInt()
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}
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data := args.data()
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var accessList types.AccessList
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if args.AccessList != nil {
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accessList = *args.AccessList
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}
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msg := &core.Message{
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From: addr,
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To: args.To,
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Value: value,
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GasLimit: gas,
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GasPrice: gasPrice,
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GasFeeCap: gasFeeCap,
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GasTipCap: gasTipCap,
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Data: data,
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AccessList: accessList,
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SkipAccountChecks: true,
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}
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return msg, nil
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}
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