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taiko_worker.go
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taiko_worker.go
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package miner
import (
"bytes"
"compress/zlib"
"errors"
"fmt"
"math/big"
"os"
"strconv"
"time"
"github.com/ethereum/go-ethereum/beacon/engine"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/txpool"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/rlp"
"github.com/holiman/uint256"
)
// BuildTransactionsLists builds multiple transactions lists which satisfy all the given conditions
// 1. All transactions should all be able to pay the given base fee.
// 2. The total gas used should not exceed the given blockMaxGasLimit
// 3. The total bytes used should not exceed the given maxBytesPerTxList
// 4. The total number of transactions lists should not exceed the given maxTransactionsLists
func (w *worker) BuildTransactionsLists(
beneficiary common.Address,
baseFee *big.Int,
blockMaxGasLimit uint64,
maxBytesPerTxList uint64,
localAccounts []string,
maxTransactionsLists uint64,
) ([]*PreBuiltTxList, error) {
var (
txsLists []*PreBuiltTxList
currentHead = w.chain.CurrentBlock()
)
if currentHead == nil {
return nil, fmt.Errorf("failed to find current head")
}
// Check if tx pool is empty at first.
if len(w.eth.TxPool().Pending(txpool.PendingFilter{BaseFee: uint256.MustFromBig(baseFee), OnlyPlainTxs: true})) == 0 {
return txsLists, nil
}
params := &generateParams{
timestamp: uint64(time.Now().Unix()),
forceTime: true,
parentHash: currentHead.Hash(),
coinbase: beneficiary,
random: currentHead.MixDigest,
noTxs: false,
baseFeePerGas: baseFee,
}
env, err := w.prepareWork(params)
if err != nil {
return nil, err
}
defer env.discard()
var (
signer = types.MakeSigner(w.chainConfig, new(big.Int).Add(currentHead.Number, common.Big1), currentHead.Time)
// Split the pending transactions into locals and remotes, then
// fill the block with all available pending transactions.
localTxs, remoteTxs = w.getPendingTxs(localAccounts, baseFee)
)
commitTxs := func(firstTransaction *types.Transaction) (*types.Transaction, *PreBuiltTxList, error) {
env.tcount = 0
env.txs = []*types.Transaction{}
env.gasPool = new(core.GasPool).AddGas(blockMaxGasLimit)
env.header.GasLimit = blockMaxGasLimit
var (
locals = make(map[common.Address][]*txpool.LazyTransaction)
remotes = make(map[common.Address][]*txpool.LazyTransaction)
)
for address, txs := range localTxs {
locals[address] = txs
}
for address, txs := range remoteTxs {
remotes[address] = txs
}
lastTransaction := w.commitL2Transactions(
env,
firstTransaction,
newTransactionsByPriceAndNonce(signer, locals, baseFee),
newTransactionsByPriceAndNonce(signer, remotes, baseFee),
maxBytesPerTxList,
)
b, err := encodeAndComporeessTxList(env.txs)
if err != nil {
return nil, nil, err
}
return lastTransaction, &PreBuiltTxList{
TxList: env.txs,
EstimatedGasUsed: env.header.GasLimit - env.gasPool.Gas(),
BytesLength: uint64(len(b)),
}, nil
}
var (
lastTx *types.Transaction
res *PreBuiltTxList
)
for i := 0; i < int(maxTransactionsLists); i++ {
if lastTx, res, err = commitTxs(lastTx); err != nil {
return nil, err
}
if len(res.TxList) == 0 {
break
}
txsLists = append(txsLists, res)
}
return txsLists, nil
}
// sealBlockWith mines and seals a block with the given block metadata.
func (w *worker) sealBlockWith(
parent common.Hash,
timestamp uint64,
blkMeta *engine.BlockMetadata,
baseFeePerGas *big.Int,
withdrawals types.Withdrawals,
) (*types.Block, error) {
// Decode transactions bytes.
var txs types.Transactions
if err := rlp.DecodeBytes(blkMeta.TxList, &txs); err != nil {
return nil, fmt.Errorf("failed to decode txList: %w", err)
}
if len(txs) == 0 {
// A L2 block needs to have have at least one `V1TaikoL2.anchor` or
// `V1TaikoL2.invalidateBlock` transaction.
return nil, fmt.Errorf("too less transactions in the block")
}
params := &generateParams{
timestamp: timestamp,
forceTime: true,
parentHash: parent,
coinbase: blkMeta.Beneficiary,
random: blkMeta.MixHash,
withdrawals: withdrawals,
noTxs: false,
baseFeePerGas: baseFeePerGas,
}
// Set extraData
w.extra = blkMeta.ExtraData
env, err := w.prepareWork(params)
if err != nil {
return nil, err
}
defer env.discard()
env.header.GasLimit = blkMeta.GasLimit
// Commit transactions.
gasLimit := env.header.GasLimit
rules := w.chain.Config().Rules(env.header.Number, true, timestamp)
env.gasPool = new(core.GasPool).AddGas(gasLimit)
for i, tx := range txs {
if i == 0 {
if err := tx.MarkAsAnchor(); err != nil {
return nil, err
}
}
// Skip blob transactions
if tx.Type() == types.BlobTxType {
log.Debug("Skip a blob transaction", "hash", tx.Hash())
continue
}
sender, err := types.LatestSignerForChainID(w.chainConfig.ChainID).Sender(tx)
if err != nil {
log.Debug("Skip an invalid proposed transaction", "hash", tx.Hash(), "reason", err)
continue
}
env.state.Prepare(rules, sender, blkMeta.Beneficiary, tx.To(), vm.ActivePrecompiles(rules), tx.AccessList())
env.state.SetTxContext(tx.Hash(), env.tcount)
if _, err := w.commitTransaction(env, tx); err != nil {
log.Debug("Skip an invalid proposed transaction", "hash", tx.Hash(), "reason", err)
continue
}
env.tcount++
}
block, err := w.engine.FinalizeAndAssemble(w.chain, env.header, env.state, env.txs, nil, env.receipts, withdrawals)
if err != nil {
return nil, err
}
results := make(chan *types.Block, 1)
if err := w.engine.Seal(w.chain, block, results, nil); err != nil {
return nil, err
}
block = <-results
return block, nil
}
// getPendingTxs fetches the pending transactions from tx pool.
func (w *worker) getPendingTxs(localAccounts []string, baseFee *big.Int) (
map[common.Address][]*txpool.LazyTransaction,
map[common.Address][]*txpool.LazyTransaction,
) {
pending := w.eth.TxPool().Pending(txpool.PendingFilter{OnlyPlainTxs: true, BaseFee: uint256.MustFromBig(baseFee)})
localTxs, remoteTxs := make(map[common.Address][]*txpool.LazyTransaction), pending
for _, local := range localAccounts {
account := common.HexToAddress(local)
if txs := remoteTxs[account]; len(txs) > 0 {
delete(remoteTxs, account)
localTxs[account] = txs
}
}
return localTxs, remoteTxs
}
// commitL2Transactions tries to commit the transactions into the given state.
func (w *worker) commitL2Transactions(
env *environment,
firstTransaction *types.Transaction,
txsLocal *transactionsByPriceAndNonce,
txsRemote *transactionsByPriceAndNonce,
maxBytesPerTxList uint64,
) *types.Transaction {
var (
txs = txsLocal
isLocal = true
lastTransaction *types.Transaction
)
if firstTransaction != nil {
env.txs = append(env.txs, firstTransaction)
}
for {
// If we don't have enough gas for any further transactions then we're done.
if env.gasPool.Gas() < params.TxGas {
log.Trace("Not enough gas for further transactions", "have", env.gasPool, "want", params.TxGas)
break
}
// Retrieve the next transaction and abort if all done.
ltx, _ := txs.Peek()
if ltx == nil {
if isLocal {
txs = txsRemote
isLocal = false
continue
}
break
}
tx := ltx.Resolve()
if tx == nil {
log.Trace("Ignoring evicted transaction")
txs.Pop()
continue
}
if os.Getenv("TAIKO_MIN_TIP") != "" {
minTip, err := strconv.Atoi(os.Getenv("TAIKO_MIN_TIP"))
if err != nil {
log.Error("Failed to parse TAIKO_MIN_TIP", "err", err)
} else {
if tx.GasTipCapIntCmp(new(big.Int).SetUint64(uint64(minTip))) < 0 {
log.Trace("Ignoring transaction with low tip", "hash", tx.Hash(), "tip", tx.GasTipCap(), "minTip", minTip)
txs.Pop()
continue
}
}
}
// Error may be ignored here. The error has already been checked
// during transaction acceptance is the transaction pool.
from, _ := types.Sender(env.signer, tx)
// Check whether the tx is replay protected. If we're not in the EIP155 hf
// phase, start ignoring the sender until we do.
if tx.Protected() && !w.chainConfig.IsEIP155(env.header.Number) {
log.Trace("Ignoring reply protected transaction", "hash", tx.Hash(), "eip155", w.chainConfig.EIP155Block)
txs.Pop()
continue
}
// Start executing the transaction
env.state.SetTxContext(tx.Hash(), env.tcount)
_, err := w.commitTransaction(env, tx)
switch {
case errors.Is(err, core.ErrNonceTooLow):
// New head notification data race between the transaction pool and miner, shift
log.Trace("Skipping transaction with low nonce", "hash", ltx.Hash, "sender", from, "nonce", tx.Nonce())
txs.Shift()
case errors.Is(err, nil):
// Everything ok, collect the logs and shift in the next transaction from the same account
env.tcount++
txs.Shift()
default:
// Transaction is regarded as invalid, drop all consecutive transactions from
// the same sender because of `nonce-too-high` clause.
log.Trace("Transaction failed, account skipped", "hash", ltx.Hash, "err", err)
txs.Pop()
}
// Encode and compress the txList, if the byte length is > maxBytesPerTxList, remove the latest tx and break.
b, err := encodeAndComporeessTxList(append(env.txs, tx))
if err != nil {
log.Trace("Failed to rlp encode and compress the pending transaction %s: %w", tx.Hash(), err)
txs.Pop()
continue
}
if len(b) > int(maxBytesPerTxList) {
lastTransaction = env.txs[env.tcount-1]
env.txs = env.txs[0 : env.tcount-1]
break
}
}
return lastTransaction
}
// encodeAndComporeessTxList encodes and compresses the given transactions list.
func encodeAndComporeessTxList(txs types.Transactions) ([]byte, error) {
b, err := rlp.EncodeToBytes(txs)
if err != nil {
return nil, err
}
return compress(b)
}
// compress compresses the given txList bytes using zlib.
func compress(txListBytes []byte) ([]byte, error) {
var b bytes.Buffer
w := zlib.NewWriter(&b)
defer w.Close()
if _, err := w.Write(txListBytes); err != nil {
return nil, err
}
if err := w.Flush(); err != nil {
return nil, err
}
return b.Bytes(), nil
}