534 lines
18 KiB
Go
534 lines
18 KiB
Go
// Copyright 2021 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package ethapi
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import (
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"bytes"
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"context"
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"crypto/sha256"
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"errors"
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"fmt"
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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/consensus/misc/eip4844"
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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/ethereum/go-ethereum/crypto/kzg4844"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/params"
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"github.com/ethereum/go-ethereum/rpc"
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"github.com/holiman/uint256"
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)
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var (
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maxBlobsPerTransaction = params.MaxBlobGasPerBlock / params.BlobTxBlobGasPerBlob
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)
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// TransactionArgs represents the arguments to construct a new transaction
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// or a message call.
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type TransactionArgs struct {
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From *common.Address `json:"from"`
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To *common.Address `json:"to"`
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Gas *hexutil.Uint64 `json:"gas"`
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GasPrice *hexutil.Big `json:"gasPrice"`
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MaxFeePerGas *hexutil.Big `json:"maxFeePerGas"`
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MaxPriorityFeePerGas *hexutil.Big `json:"maxPriorityFeePerGas"`
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Value *hexutil.Big `json:"value"`
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Nonce *hexutil.Uint64 `json:"nonce"`
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// We accept "data" and "input" for backwards-compatibility reasons.
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// "input" is the newer name and should be preferred by clients.
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// Issue detail: https://github.com/ethereum/go-ethereum/issues/15628
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Data *hexutil.Bytes `json:"data"`
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Input *hexutil.Bytes `json:"input"`
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// Introduced by AccessListTxType transaction.
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AccessList *types.AccessList `json:"accessList,omitempty"`
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ChainID *hexutil.Big `json:"chainId,omitempty"`
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// For BlobTxType
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BlobFeeCap *hexutil.Big `json:"maxFeePerBlobGas"`
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BlobHashes []common.Hash `json:"blobVersionedHashes,omitempty"`
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// For BlobTxType transactions with blob sidecar
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Blobs []kzg4844.Blob `json:"blobs"`
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Commitments []kzg4844.Commitment `json:"commitments"`
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Proofs []kzg4844.Proof `json:"proofs"`
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// This configures whether blobs are allowed to be passed.
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blobSidecarAllowed bool
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}
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// from retrieves the transaction sender address.
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func (args *TransactionArgs) from() common.Address {
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if args.From == nil {
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return common.Address{}
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}
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return *args.From
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}
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// data retrieves the transaction calldata. Input field is preferred.
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func (args *TransactionArgs) data() []byte {
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if args.Input != nil {
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return *args.Input
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}
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if args.Data != nil {
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return *args.Data
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}
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return nil
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}
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// setDefaults fills in default values for unspecified tx fields.
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func (args *TransactionArgs) setDefaults(ctx context.Context, b Backend, skipGasEstimation bool) error {
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if err := args.setBlobTxSidecar(ctx, b); err != nil {
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return err
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}
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if err := args.setFeeDefaults(ctx, b); err != nil {
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return err
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}
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if args.Value == nil {
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args.Value = new(hexutil.Big)
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}
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if args.Nonce == nil {
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nonce, err := b.GetPoolNonce(ctx, args.from())
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if err != nil {
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return err
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}
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args.Nonce = (*hexutil.Uint64)(&nonce)
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}
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if args.Data != nil && args.Input != nil && !bytes.Equal(*args.Data, *args.Input) {
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return errors.New(`both "data" and "input" are set and not equal. Please use "input" to pass transaction call data`)
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}
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// BlobTx fields
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if args.BlobHashes != nil && len(args.BlobHashes) == 0 {
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return errors.New(`need at least 1 blob for a blob transaction`)
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}
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if args.BlobHashes != nil && len(args.BlobHashes) > maxBlobsPerTransaction {
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return fmt.Errorf(`too many blobs in transaction (have=%d, max=%d)`, len(args.BlobHashes), maxBlobsPerTransaction)
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}
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// create check
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if args.To == nil {
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if args.BlobHashes != nil {
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return errors.New(`missing "to" in blob transaction`)
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}
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if len(args.data()) == 0 {
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return errors.New(`contract creation without any data provided`)
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}
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}
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if args.Gas == nil {
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if skipGasEstimation { // Skip gas usage estimation if a precise gas limit is not critical, e.g., in non-transaction calls.
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gas := hexutil.Uint64(b.RPCGasCap())
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if gas == 0 {
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gas = hexutil.Uint64(math.MaxUint64 / 2)
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}
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args.Gas = &gas
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} else { // Estimate the gas usage otherwise.
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// These fields are immutable during the estimation, safe to
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// pass the pointer directly.
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data := args.data()
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callArgs := TransactionArgs{
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From: args.From,
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To: args.To,
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GasPrice: args.GasPrice,
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MaxFeePerGas: args.MaxFeePerGas,
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MaxPriorityFeePerGas: args.MaxPriorityFeePerGas,
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Value: args.Value,
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Data: (*hexutil.Bytes)(&data),
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AccessList: args.AccessList,
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BlobFeeCap: args.BlobFeeCap,
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BlobHashes: args.BlobHashes,
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}
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latestBlockNr := rpc.BlockNumberOrHashWithNumber(rpc.LatestBlockNumber)
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estimated, err := DoEstimateGas(ctx, b, callArgs, latestBlockNr, nil, b.RPCGasCap())
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if err != nil {
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return err
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}
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args.Gas = &estimated
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log.Trace("Estimate gas usage automatically", "gas", args.Gas)
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}
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}
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// If chain id is provided, ensure it matches the local chain id. Otherwise, set the local
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// chain id as the default.
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want := b.ChainConfig().ChainID
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if args.ChainID != nil {
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if have := (*big.Int)(args.ChainID); have.Cmp(want) != 0 {
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return fmt.Errorf("chainId does not match node's (have=%v, want=%v)", have, want)
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}
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} else {
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args.ChainID = (*hexutil.Big)(want)
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}
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return nil
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}
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// setFeeDefaults fills in default fee values for unspecified tx fields.
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func (args *TransactionArgs) setFeeDefaults(ctx context.Context, b Backend) error {
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head := b.CurrentHeader()
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// Sanity check the EIP-4844 fee parameters.
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if args.BlobFeeCap != nil && args.BlobFeeCap.ToInt().Sign() == 0 {
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return errors.New("maxFeePerBlobGas, if specified, must be non-zero")
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}
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if err := args.setCancunFeeDefaults(ctx, head, b); err != nil {
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return err
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}
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// If both gasPrice and at least one of the EIP-1559 fee parameters are specified, error.
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if args.GasPrice != nil && (args.MaxFeePerGas != nil || args.MaxPriorityFeePerGas != nil) {
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return errors.New("both gasPrice and (maxFeePerGas or maxPriorityFeePerGas) specified")
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}
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// If the tx has completely specified a fee mechanism, no default is needed.
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// This allows users who are not yet synced past London to get defaults for
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// other tx values. See https://github.com/ethereum/go-ethereum/pull/23274
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// for more information.
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eip1559ParamsSet := args.MaxFeePerGas != nil && args.MaxPriorityFeePerGas != nil
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// Sanity check the EIP-1559 fee parameters if present.
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if args.GasPrice == nil && eip1559ParamsSet {
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if args.MaxFeePerGas.ToInt().Sign() == 0 {
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return errors.New("maxFeePerGas must be non-zero")
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}
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if args.MaxFeePerGas.ToInt().Cmp(args.MaxPriorityFeePerGas.ToInt()) < 0 {
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return fmt.Errorf("maxFeePerGas (%v) < maxPriorityFeePerGas (%v)", args.MaxFeePerGas, args.MaxPriorityFeePerGas)
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}
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return nil // No need to set anything, user already set MaxFeePerGas and MaxPriorityFeePerGas
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}
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// Sanity check the non-EIP-1559 fee parameters.
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isLondon := b.ChainConfig().IsLondon(head.Number)
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if args.GasPrice != nil && !eip1559ParamsSet {
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// Zero gas-price is not allowed after London fork
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if args.GasPrice.ToInt().Sign() == 0 && isLondon {
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return errors.New("gasPrice must be non-zero after london fork")
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}
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return nil // No need to set anything, user already set GasPrice
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}
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// Now attempt to fill in default value depending on whether London is active or not.
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if isLondon {
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// London is active, set maxPriorityFeePerGas and maxFeePerGas.
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if err := args.setLondonFeeDefaults(ctx, head, b); err != nil {
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return err
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}
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} else {
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if args.MaxFeePerGas != nil || args.MaxPriorityFeePerGas != nil {
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return errors.New("maxFeePerGas and maxPriorityFeePerGas are not valid before London is active")
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}
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// London not active, set gas price.
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price, err := b.SuggestGasTipCap(ctx)
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if err != nil {
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return err
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}
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args.GasPrice = (*hexutil.Big)(price)
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}
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return nil
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}
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// setCancunFeeDefaults fills in reasonable default fee values for unspecified fields.
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func (args *TransactionArgs) setCancunFeeDefaults(ctx context.Context, head *types.Header, b Backend) error {
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// Set maxFeePerBlobGas if it is missing.
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if args.BlobHashes != nil && args.BlobFeeCap == nil {
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var excessBlobGas uint64
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if head.ExcessBlobGas != nil {
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excessBlobGas = *head.ExcessBlobGas
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}
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// ExcessBlobGas must be set for a Cancun block.
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blobBaseFee := eip4844.CalcBlobFee(excessBlobGas)
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// Set the max fee to be 2 times larger than the previous block's blob base fee.
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// The additional slack allows the tx to not become invalidated if the base
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// fee is rising.
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val := new(big.Int).Mul(blobBaseFee, big.NewInt(2))
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args.BlobFeeCap = (*hexutil.Big)(val)
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}
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return nil
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}
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// setLondonFeeDefaults fills in reasonable default fee values for unspecified fields.
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func (args *TransactionArgs) setLondonFeeDefaults(ctx context.Context, head *types.Header, b Backend) error {
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// Set maxPriorityFeePerGas if it is missing.
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if args.MaxPriorityFeePerGas == nil {
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tip, err := b.SuggestGasTipCap(ctx)
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if err != nil {
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return err
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}
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args.MaxPriorityFeePerGas = (*hexutil.Big)(tip)
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}
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// Set maxFeePerGas if it is missing.
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if args.MaxFeePerGas == nil {
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// Set the max fee to be 2 times larger than the previous block's base fee.
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// The additional slack allows the tx to not become invalidated if the base
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// fee is rising.
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val := new(big.Int).Add(
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args.MaxPriorityFeePerGas.ToInt(),
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new(big.Int).Mul(head.BaseFee, big.NewInt(2)),
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)
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args.MaxFeePerGas = (*hexutil.Big)(val)
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}
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// Both EIP-1559 fee parameters are now set; sanity check them.
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if args.MaxFeePerGas.ToInt().Cmp(args.MaxPriorityFeePerGas.ToInt()) < 0 {
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return fmt.Errorf("maxFeePerGas (%v) < maxPriorityFeePerGas (%v)", args.MaxFeePerGas, args.MaxPriorityFeePerGas)
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}
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return nil
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}
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// setBlobTxSidecar adds the blob tx
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func (args *TransactionArgs) setBlobTxSidecar(ctx context.Context, b Backend) error {
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// No blobs, we're done.
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if args.Blobs == nil {
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return nil
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}
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// Passing blobs is not allowed in all contexts, only in specific methods.
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if !args.blobSidecarAllowed {
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return errors.New(`"blobs" is not supported for this RPC method`)
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}
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n := len(args.Blobs)
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// Assume user provides either only blobs (w/o hashes), or
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// blobs together with commitments and proofs.
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if args.Commitments == nil && args.Proofs != nil {
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return errors.New(`blob proofs provided while commitments were not`)
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} else if args.Commitments != nil && args.Proofs == nil {
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return errors.New(`blob commitments provided while proofs were not`)
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}
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// len(blobs) == len(commitments) == len(proofs) == len(hashes)
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if args.Commitments != nil && len(args.Commitments) != n {
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return fmt.Errorf("number of blobs and commitments mismatch (have=%d, want=%d)", len(args.Commitments), n)
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}
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if args.Proofs != nil && len(args.Proofs) != n {
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return fmt.Errorf("number of blobs and proofs mismatch (have=%d, want=%d)", len(args.Proofs), n)
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}
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if args.BlobHashes != nil && len(args.BlobHashes) != n {
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return fmt.Errorf("number of blobs and hashes mismatch (have=%d, want=%d)", len(args.BlobHashes), n)
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}
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if args.Commitments == nil {
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// Generate commitment and proof.
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commitments := make([]kzg4844.Commitment, n)
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proofs := make([]kzg4844.Proof, n)
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for i, b := range args.Blobs {
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c, err := kzg4844.BlobToCommitment(&b)
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if err != nil {
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return fmt.Errorf("blobs[%d]: error computing commitment: %v", i, err)
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}
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commitments[i] = c
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p, err := kzg4844.ComputeBlobProof(&b, c)
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if err != nil {
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return fmt.Errorf("blobs[%d]: error computing proof: %v", i, err)
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}
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proofs[i] = p
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}
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args.Commitments = commitments
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args.Proofs = proofs
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} else {
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for i, b := range args.Blobs {
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if err := kzg4844.VerifyBlobProof(&b, args.Commitments[i], args.Proofs[i]); err != nil {
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return fmt.Errorf("failed to verify blob proof: %v", err)
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}
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}
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}
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hashes := make([]common.Hash, n)
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hasher := sha256.New()
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for i, c := range args.Commitments {
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hashes[i] = kzg4844.CalcBlobHashV1(hasher, &c)
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}
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if args.BlobHashes != nil {
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for i, h := range hashes {
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if h != args.BlobHashes[i] {
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return fmt.Errorf("blob hash verification failed (have=%s, want=%s)", args.BlobHashes[i], h)
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}
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}
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} else {
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args.BlobHashes = hashes
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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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log.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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blobFeeCap *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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if args.BlobFeeCap != nil {
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blobFeeCap = args.BlobFeeCap.ToInt()
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} else if args.BlobHashes != nil {
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blobFeeCap = new(big.Int)
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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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BlobGasFeeCap: blobFeeCap,
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BlobHashes: args.BlobHashes,
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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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// toTransaction converts the arguments to a transaction.
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// This assumes that setDefaults has been called.
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func (args *TransactionArgs) toTransaction() *types.Transaction {
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var data types.TxData
|
|
switch {
|
|
case args.BlobHashes != nil:
|
|
al := types.AccessList{}
|
|
if args.AccessList != nil {
|
|
al = *args.AccessList
|
|
}
|
|
data = &types.BlobTx{
|
|
To: *args.To,
|
|
ChainID: uint256.MustFromBig((*big.Int)(args.ChainID)),
|
|
Nonce: uint64(*args.Nonce),
|
|
Gas: uint64(*args.Gas),
|
|
GasFeeCap: uint256.MustFromBig((*big.Int)(args.MaxFeePerGas)),
|
|
GasTipCap: uint256.MustFromBig((*big.Int)(args.MaxPriorityFeePerGas)),
|
|
Value: uint256.MustFromBig((*big.Int)(args.Value)),
|
|
Data: args.data(),
|
|
AccessList: al,
|
|
BlobHashes: args.BlobHashes,
|
|
BlobFeeCap: uint256.MustFromBig((*big.Int)(args.BlobFeeCap)),
|
|
}
|
|
if args.Blobs != nil {
|
|
data.(*types.BlobTx).Sidecar = &types.BlobTxSidecar{
|
|
Blobs: args.Blobs,
|
|
Commitments: args.Commitments,
|
|
Proofs: args.Proofs,
|
|
}
|
|
}
|
|
|
|
case args.MaxFeePerGas != nil:
|
|
al := types.AccessList{}
|
|
if args.AccessList != nil {
|
|
al = *args.AccessList
|
|
}
|
|
data = &types.DynamicFeeTx{
|
|
To: args.To,
|
|
ChainID: (*big.Int)(args.ChainID),
|
|
Nonce: uint64(*args.Nonce),
|
|
Gas: uint64(*args.Gas),
|
|
GasFeeCap: (*big.Int)(args.MaxFeePerGas),
|
|
GasTipCap: (*big.Int)(args.MaxPriorityFeePerGas),
|
|
Value: (*big.Int)(args.Value),
|
|
Data: args.data(),
|
|
AccessList: al,
|
|
}
|
|
|
|
case args.AccessList != nil:
|
|
data = &types.AccessListTx{
|
|
To: args.To,
|
|
ChainID: (*big.Int)(args.ChainID),
|
|
Nonce: uint64(*args.Nonce),
|
|
Gas: uint64(*args.Gas),
|
|
GasPrice: (*big.Int)(args.GasPrice),
|
|
Value: (*big.Int)(args.Value),
|
|
Data: args.data(),
|
|
AccessList: *args.AccessList,
|
|
}
|
|
|
|
default:
|
|
data = &types.LegacyTx{
|
|
To: args.To,
|
|
Nonce: uint64(*args.Nonce),
|
|
Gas: uint64(*args.Gas),
|
|
GasPrice: (*big.Int)(args.GasPrice),
|
|
Value: (*big.Int)(args.Value),
|
|
Data: args.data(),
|
|
}
|
|
}
|
|
return types.NewTx(data)
|
|
}
|
|
|
|
// IsEIP4844 returns an indicator if the args contains EIP4844 fields.
|
|
func (args *TransactionArgs) IsEIP4844() bool {
|
|
return args.BlobHashes != nil || args.BlobFeeCap != nil
|
|
}
|