281 lines
11 KiB
Go
281 lines
11 KiB
Go
// Copyright 2022 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 engine
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import (
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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/core/types"
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"github.com/ethereum/go-ethereum/trie"
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)
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//go:generate go run github.com/fjl/gencodec -type PayloadAttributes -field-override payloadAttributesMarshaling -out gen_blockparams.go
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// PayloadAttributes describes the environment context in which a block should
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// be built.
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type PayloadAttributes struct {
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Timestamp uint64 `json:"timestamp" gencodec:"required"`
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Random common.Hash `json:"prevRandao" gencodec:"required"`
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SuggestedFeeRecipient common.Address `json:"suggestedFeeRecipient" gencodec:"required"`
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Withdrawals []*types.Withdrawal `json:"withdrawals"`
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BeaconRoot *common.Hash `json:"parentBeaconBlockRoot"`
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}
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// JSON type overrides for PayloadAttributes.
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type payloadAttributesMarshaling struct {
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Timestamp hexutil.Uint64
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}
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//go:generate go run github.com/fjl/gencodec -type ExecutableData -field-override executableDataMarshaling -out gen_ed.go
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// ExecutableData is the data necessary to execute an EL payload.
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type ExecutableData struct {
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ParentHash common.Hash `json:"parentHash" gencodec:"required"`
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FeeRecipient common.Address `json:"feeRecipient" gencodec:"required"`
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StateRoot common.Hash `json:"stateRoot" gencodec:"required"`
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ReceiptsRoot common.Hash `json:"receiptsRoot" gencodec:"required"`
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LogsBloom []byte `json:"logsBloom" gencodec:"required"`
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Random common.Hash `json:"prevRandao" gencodec:"required"`
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Number uint64 `json:"blockNumber" gencodec:"required"`
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GasLimit uint64 `json:"gasLimit" gencodec:"required"`
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GasUsed uint64 `json:"gasUsed" gencodec:"required"`
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Timestamp uint64 `json:"timestamp" gencodec:"required"`
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ExtraData []byte `json:"extraData" gencodec:"required"`
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BaseFeePerGas *big.Int `json:"baseFeePerGas" gencodec:"required"`
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BlockHash common.Hash `json:"blockHash" gencodec:"required"`
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Transactions [][]byte `json:"transactions" gencodec:"required"`
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Withdrawals []*types.Withdrawal `json:"withdrawals"`
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BlobGasUsed *uint64 `json:"blobGasUsed"`
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ExcessBlobGas *uint64 `json:"excessBlobGas"`
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}
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// JSON type overrides for executableData.
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type executableDataMarshaling struct {
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Number hexutil.Uint64
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GasLimit hexutil.Uint64
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GasUsed hexutil.Uint64
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Timestamp hexutil.Uint64
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BaseFeePerGas *hexutil.Big
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ExtraData hexutil.Bytes
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LogsBloom hexutil.Bytes
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Transactions []hexutil.Bytes
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BlobGasUsed *hexutil.Uint64
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ExcessBlobGas *hexutil.Uint64
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}
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//go:generate go run github.com/fjl/gencodec -type ExecutionPayloadEnvelope -field-override executionPayloadEnvelopeMarshaling -out gen_epe.go
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type ExecutionPayloadEnvelope struct {
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ExecutionPayload *ExecutableData `json:"executionPayload" gencodec:"required"`
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BlockValue *big.Int `json:"blockValue" gencodec:"required"`
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BlobsBundle *BlobsBundleV1 `json:"blobsBundle"`
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Override bool `json:"shouldOverrideBuilder"`
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}
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type BlobsBundleV1 struct {
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Commitments []hexutil.Bytes `json:"commitments"`
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Proofs []hexutil.Bytes `json:"proofs"`
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Blobs []hexutil.Bytes `json:"blobs"`
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}
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// JSON type overrides for ExecutionPayloadEnvelope.
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type executionPayloadEnvelopeMarshaling struct {
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BlockValue *hexutil.Big
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}
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type PayloadStatusV1 struct {
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Status string `json:"status"`
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LatestValidHash *common.Hash `json:"latestValidHash"`
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ValidationError *string `json:"validationError"`
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}
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type TransitionConfigurationV1 struct {
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TerminalTotalDifficulty *hexutil.Big `json:"terminalTotalDifficulty"`
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TerminalBlockHash common.Hash `json:"terminalBlockHash"`
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TerminalBlockNumber hexutil.Uint64 `json:"terminalBlockNumber"`
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}
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// PayloadID is an identifier of the payload build process
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type PayloadID [8]byte
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func (b PayloadID) String() string {
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return hexutil.Encode(b[:])
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}
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func (b PayloadID) MarshalText() ([]byte, error) {
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return hexutil.Bytes(b[:]).MarshalText()
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}
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func (b *PayloadID) UnmarshalText(input []byte) error {
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err := hexutil.UnmarshalFixedText("PayloadID", input, b[:])
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if err != nil {
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return fmt.Errorf("invalid payload id %q: %w", input, err)
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}
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return nil
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}
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type ForkChoiceResponse struct {
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PayloadStatus PayloadStatusV1 `json:"payloadStatus"`
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PayloadID *PayloadID `json:"payloadId"`
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}
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type ForkchoiceStateV1 struct {
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HeadBlockHash common.Hash `json:"headBlockHash"`
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SafeBlockHash common.Hash `json:"safeBlockHash"`
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FinalizedBlockHash common.Hash `json:"finalizedBlockHash"`
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}
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func encodeTransactions(txs []*types.Transaction) [][]byte {
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var enc = make([][]byte, len(txs))
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for i, tx := range txs {
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enc[i], _ = tx.MarshalBinary()
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}
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return enc
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}
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func decodeTransactions(enc [][]byte) ([]*types.Transaction, error) {
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var txs = make([]*types.Transaction, len(enc))
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for i, encTx := range enc {
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var tx types.Transaction
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if err := tx.UnmarshalBinary(encTx); err != nil {
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return nil, fmt.Errorf("invalid transaction %d: %v", i, err)
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}
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txs[i] = &tx
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}
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return txs, nil
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}
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// ExecutableDataToBlock constructs a block from executable data.
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// It verifies that the following fields:
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//
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// len(extraData) <= 32
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// uncleHash = emptyUncleHash
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// difficulty = 0
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// if versionedHashes != nil, versionedHashes match to blob transactions
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//
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// and that the blockhash of the constructed block matches the parameters. Nil
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// Withdrawals value will propagate through the returned block. Empty
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// Withdrawals value must be passed via non-nil, length 0 value in params.
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func ExecutableDataToBlock(params ExecutableData, versionedHashes []common.Hash, beaconRoot *common.Hash) (*types.Block, error) {
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txs, err := decodeTransactions(params.Transactions)
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if err != nil {
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return nil, err
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}
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if len(params.ExtraData) > 32 {
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return nil, fmt.Errorf("invalid extradata length: %v", len(params.ExtraData))
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}
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if len(params.LogsBloom) != 256 {
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return nil, fmt.Errorf("invalid logsBloom length: %v", len(params.LogsBloom))
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}
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// Check that baseFeePerGas is not negative or too big
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if params.BaseFeePerGas != nil && (params.BaseFeePerGas.Sign() == -1 || params.BaseFeePerGas.BitLen() > 256) {
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return nil, fmt.Errorf("invalid baseFeePerGas: %v", params.BaseFeePerGas)
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}
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var blobHashes []common.Hash
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for _, tx := range txs {
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blobHashes = append(blobHashes, tx.BlobHashes()...)
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}
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if len(blobHashes) != len(versionedHashes) {
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return nil, fmt.Errorf("invalid number of versionedHashes: %v blobHashes: %v", versionedHashes, blobHashes)
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}
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for i := 0; i < len(blobHashes); i++ {
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if blobHashes[i] != versionedHashes[i] {
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return nil, fmt.Errorf("invalid versionedHash at %v: %v blobHashes: %v", i, versionedHashes, blobHashes)
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}
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}
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// Only set withdrawalsRoot if it is non-nil. This allows CLs to use
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// ExecutableData before withdrawals are enabled by marshaling
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// Withdrawals as the json null value.
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var withdrawalsRoot *common.Hash
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if params.Withdrawals != nil {
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h := types.DeriveSha(types.Withdrawals(params.Withdrawals), trie.NewStackTrie(nil))
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withdrawalsRoot = &h
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}
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header := &types.Header{
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ParentHash: params.ParentHash,
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UncleHash: types.EmptyUncleHash,
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Coinbase: params.FeeRecipient,
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Root: params.StateRoot,
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TxHash: types.DeriveSha(types.Transactions(txs), trie.NewStackTrie(nil)),
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ReceiptHash: params.ReceiptsRoot,
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Bloom: types.BytesToBloom(params.LogsBloom),
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Difficulty: common.Big0,
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Number: new(big.Int).SetUint64(params.Number),
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GasLimit: params.GasLimit,
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GasUsed: params.GasUsed,
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Time: params.Timestamp,
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BaseFee: params.BaseFeePerGas,
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Extra: params.ExtraData,
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MixDigest: params.Random,
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WithdrawalsHash: withdrawalsRoot,
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ExcessBlobGas: params.ExcessBlobGas,
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BlobGasUsed: params.BlobGasUsed,
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ParentBeaconRoot: beaconRoot,
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}
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block := types.NewBlockWithHeader(header).WithBody(txs, nil /* uncles */).WithWithdrawals(params.Withdrawals)
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if block.Hash() != params.BlockHash {
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return nil, fmt.Errorf("blockhash mismatch, want %x, got %x", params.BlockHash, block.Hash())
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}
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return block, nil
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}
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// BlockToExecutableData constructs the ExecutableData structure by filling the
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// fields from the given block. It assumes the given block is post-merge block.
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func BlockToExecutableData(block *types.Block, fees *big.Int, sidecars []*types.BlobTxSidecar) *ExecutionPayloadEnvelope {
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data := &ExecutableData{
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BlockHash: block.Hash(),
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ParentHash: block.ParentHash(),
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FeeRecipient: block.Coinbase(),
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StateRoot: block.Root(),
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Number: block.NumberU64(),
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GasLimit: block.GasLimit(),
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GasUsed: block.GasUsed(),
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BaseFeePerGas: block.BaseFee(),
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Timestamp: block.Time(),
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ReceiptsRoot: block.ReceiptHash(),
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LogsBloom: block.Bloom().Bytes(),
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Transactions: encodeTransactions(block.Transactions()),
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Random: block.MixDigest(),
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ExtraData: block.Extra(),
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Withdrawals: block.Withdrawals(),
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BlobGasUsed: block.BlobGasUsed(),
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ExcessBlobGas: block.ExcessBlobGas(),
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}
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bundle := BlobsBundleV1{
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Commitments: make([]hexutil.Bytes, 0),
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Blobs: make([]hexutil.Bytes, 0),
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Proofs: make([]hexutil.Bytes, 0),
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}
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for _, sidecar := range sidecars {
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for j := range sidecar.Blobs {
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bundle.Blobs = append(bundle.Blobs, hexutil.Bytes(sidecar.Blobs[j][:]))
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bundle.Commitments = append(bundle.Commitments, hexutil.Bytes(sidecar.Commitments[j][:]))
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bundle.Proofs = append(bundle.Proofs, hexutil.Bytes(sidecar.Proofs[j][:]))
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}
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}
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return &ExecutionPayloadEnvelope{ExecutionPayload: data, BlockValue: fees, BlobsBundle: &bundle, Override: false}
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}
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// ExecutionPayloadBodyV1 is used in the response to GetPayloadBodiesByHashV1 and GetPayloadBodiesByRangeV1
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type ExecutionPayloadBodyV1 struct {
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TransactionData []hexutil.Bytes `json:"transactions"`
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Withdrawals []*types.Withdrawal `json:"withdrawals"`
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}
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