fbdeff99ce
Currently, in order to chain together sequential valid t8n transitions the caller must manually calculate the block base fee. This PR adds support for the necessary parent fee market data to calculate the base fee for the current transition.
Concretely, env is extended to accept the following:
parentBaseFee
parentGasUsed
parentGasLimit
Example usage can be found in ./cmd/evm/testdata/25.
Co-authored-by: Martin Holst Swende <martin@swende.se>
321 lines
12 KiB
Go
321 lines
12 KiB
Go
// Copyright 2020 The go-ethereum Authors
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// This file is part of go-ethereum.
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//
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// go-ethereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU 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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// go-ethereum 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 General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
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package t8ntool
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import (
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"fmt"
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"math/big"
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"os"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/math"
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"github.com/ethereum/go-ethereum/consensus/ethash"
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"github.com/ethereum/go-ethereum/consensus/misc"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/rawdb"
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"github.com/ethereum/go-ethereum/core/state"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/core/vm"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/ethdb"
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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/rlp"
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"github.com/ethereum/go-ethereum/trie"
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"golang.org/x/crypto/sha3"
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)
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type Prestate struct {
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Env stEnv `json:"env"`
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Pre core.GenesisAlloc `json:"pre"`
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}
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// ExecutionResult contains the execution status after running a state test, any
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// error that might have occurred and a dump of the final state if requested.
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type ExecutionResult struct {
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StateRoot common.Hash `json:"stateRoot"`
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TxRoot common.Hash `json:"txRoot"`
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ReceiptRoot common.Hash `json:"receiptsRoot"`
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LogsHash common.Hash `json:"logsHash"`
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Bloom types.Bloom `json:"logsBloom" gencodec:"required"`
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Receipts types.Receipts `json:"receipts"`
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Rejected []*rejectedTx `json:"rejected,omitempty"`
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Difficulty *math.HexOrDecimal256 `json:"currentDifficulty" gencodec:"required"`
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GasUsed math.HexOrDecimal64 `json:"gasUsed"`
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BaseFee *math.HexOrDecimal256 `json:"currentBaseFee,omitempty"`
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}
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type ommer struct {
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Delta uint64 `json:"delta"`
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Address common.Address `json:"address"`
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}
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//go:generate go run github.com/fjl/gencodec -type stEnv -field-override stEnvMarshaling -out gen_stenv.go
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type stEnv struct {
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Coinbase common.Address `json:"currentCoinbase" gencodec:"required"`
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Difficulty *big.Int `json:"currentDifficulty"`
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Random *big.Int `json:"currentRandom"`
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ParentDifficulty *big.Int `json:"parentDifficulty"`
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ParentBaseFee *big.Int `json:"parentBaseFee,omitempty"`
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ParentGasUsed uint64 `json:"parentGasUsed,omitempty"`
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ParentGasLimit uint64 `json:"parentGasLimit,omitempty"`
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GasLimit uint64 `json:"currentGasLimit" gencodec:"required"`
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Number uint64 `json:"currentNumber" gencodec:"required"`
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Timestamp uint64 `json:"currentTimestamp" gencodec:"required"`
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ParentTimestamp uint64 `json:"parentTimestamp,omitempty"`
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BlockHashes map[math.HexOrDecimal64]common.Hash `json:"blockHashes,omitempty"`
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Ommers []ommer `json:"ommers,omitempty"`
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BaseFee *big.Int `json:"currentBaseFee,omitempty"`
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ParentUncleHash common.Hash `json:"parentUncleHash"`
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}
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type stEnvMarshaling struct {
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Coinbase common.UnprefixedAddress
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Difficulty *math.HexOrDecimal256
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Random *math.HexOrDecimal256
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ParentDifficulty *math.HexOrDecimal256
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ParentBaseFee *math.HexOrDecimal256
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ParentGasUsed math.HexOrDecimal64
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ParentGasLimit math.HexOrDecimal64
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GasLimit math.HexOrDecimal64
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Number math.HexOrDecimal64
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Timestamp math.HexOrDecimal64
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ParentTimestamp math.HexOrDecimal64
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BaseFee *math.HexOrDecimal256
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}
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type rejectedTx struct {
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Index int `json:"index"`
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Err string `json:"error"`
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}
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// Apply applies a set of transactions to a pre-state
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func (pre *Prestate) Apply(vmConfig vm.Config, chainConfig *params.ChainConfig,
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txs types.Transactions, miningReward int64,
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getTracerFn func(txIndex int, txHash common.Hash) (tracer vm.EVMLogger, err error)) (*state.StateDB, *ExecutionResult, error) {
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// Capture errors for BLOCKHASH operation, if we haven't been supplied the
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// required blockhashes
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var hashError error
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getHash := func(num uint64) common.Hash {
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if pre.Env.BlockHashes == nil {
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hashError = fmt.Errorf("getHash(%d) invoked, no blockhashes provided", num)
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return common.Hash{}
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}
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h, ok := pre.Env.BlockHashes[math.HexOrDecimal64(num)]
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if !ok {
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hashError = fmt.Errorf("getHash(%d) invoked, blockhash for that block not provided", num)
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}
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return h
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}
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var (
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statedb = MakePreState(rawdb.NewMemoryDatabase(), pre.Pre)
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signer = types.MakeSigner(chainConfig, new(big.Int).SetUint64(pre.Env.Number))
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gaspool = new(core.GasPool)
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blockHash = common.Hash{0x13, 0x37}
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rejectedTxs []*rejectedTx
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includedTxs types.Transactions
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gasUsed = uint64(0)
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receipts = make(types.Receipts, 0)
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txIndex = 0
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)
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gaspool.AddGas(pre.Env.GasLimit)
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vmContext := vm.BlockContext{
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CanTransfer: core.CanTransfer,
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Transfer: core.Transfer,
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Coinbase: pre.Env.Coinbase,
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BlockNumber: new(big.Int).SetUint64(pre.Env.Number),
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Time: new(big.Int).SetUint64(pre.Env.Timestamp),
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Difficulty: pre.Env.Difficulty,
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GasLimit: pre.Env.GasLimit,
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GetHash: getHash,
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}
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// If currentBaseFee is defined, add it to the vmContext.
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if pre.Env.BaseFee != nil {
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vmContext.BaseFee = new(big.Int).Set(pre.Env.BaseFee)
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}
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// If random is defined, add it to the vmContext.
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if pre.Env.Random != nil {
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rnd := common.BigToHash(pre.Env.Random)
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vmContext.Random = &rnd
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}
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// If DAO is supported/enabled, we need to handle it here. In geth 'proper', it's
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// done in StateProcessor.Process(block, ...), right before transactions are applied.
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if chainConfig.DAOForkSupport &&
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chainConfig.DAOForkBlock != nil &&
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chainConfig.DAOForkBlock.Cmp(new(big.Int).SetUint64(pre.Env.Number)) == 0 {
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misc.ApplyDAOHardFork(statedb)
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}
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for i, tx := range txs {
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msg, err := tx.AsMessage(signer, pre.Env.BaseFee)
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if err != nil {
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log.Warn("rejected tx", "index", i, "hash", tx.Hash(), "error", err)
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rejectedTxs = append(rejectedTxs, &rejectedTx{i, err.Error()})
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continue
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}
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tracer, err := getTracerFn(txIndex, tx.Hash())
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if err != nil {
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return nil, nil, err
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}
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vmConfig.Tracer = tracer
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vmConfig.Debug = (tracer != nil)
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statedb.Prepare(tx.Hash(), txIndex)
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txContext := core.NewEVMTxContext(msg)
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snapshot := statedb.Snapshot()
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evm := vm.NewEVM(vmContext, txContext, statedb, chainConfig, vmConfig)
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// (ret []byte, usedGas uint64, failed bool, err error)
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msgResult, err := core.ApplyMessage(evm, msg, gaspool)
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if err != nil {
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statedb.RevertToSnapshot(snapshot)
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log.Info("rejected tx", "index", i, "hash", tx.Hash(), "from", msg.From(), "error", err)
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rejectedTxs = append(rejectedTxs, &rejectedTx{i, err.Error()})
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continue
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}
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includedTxs = append(includedTxs, tx)
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if hashError != nil {
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return nil, nil, NewError(ErrorMissingBlockhash, hashError)
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}
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gasUsed += msgResult.UsedGas
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// Receipt:
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{
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var root []byte
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if chainConfig.IsByzantium(vmContext.BlockNumber) {
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statedb.Finalise(true)
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} else {
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root = statedb.IntermediateRoot(chainConfig.IsEIP158(vmContext.BlockNumber)).Bytes()
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}
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// Create a new receipt for the transaction, storing the intermediate root and
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// gas used by the tx.
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receipt := &types.Receipt{Type: tx.Type(), PostState: root, CumulativeGasUsed: gasUsed}
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if msgResult.Failed() {
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receipt.Status = types.ReceiptStatusFailed
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} else {
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receipt.Status = types.ReceiptStatusSuccessful
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}
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receipt.TxHash = tx.Hash()
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receipt.GasUsed = msgResult.UsedGas
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// If the transaction created a contract, store the creation address in the receipt.
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if msg.To() == nil {
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receipt.ContractAddress = crypto.CreateAddress(evm.TxContext.Origin, tx.Nonce())
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}
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// Set the receipt logs and create the bloom filter.
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receipt.Logs = statedb.GetLogs(tx.Hash(), blockHash)
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receipt.Bloom = types.CreateBloom(types.Receipts{receipt})
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// These three are non-consensus fields:
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//receipt.BlockHash
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//receipt.BlockNumber
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receipt.TransactionIndex = uint(txIndex)
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receipts = append(receipts, receipt)
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}
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txIndex++
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}
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statedb.IntermediateRoot(chainConfig.IsEIP158(vmContext.BlockNumber))
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// Add mining reward?
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if miningReward > 0 {
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// Add mining reward. The mining reward may be `0`, which only makes a difference in the cases
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// where
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// - the coinbase suicided, or
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// - there are only 'bad' transactions, which aren't executed. In those cases,
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// the coinbase gets no txfee, so isn't created, and thus needs to be touched
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var (
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blockReward = big.NewInt(miningReward)
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minerReward = new(big.Int).Set(blockReward)
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perOmmer = new(big.Int).Div(blockReward, big.NewInt(32))
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)
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for _, ommer := range pre.Env.Ommers {
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// Add 1/32th for each ommer included
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minerReward.Add(minerReward, perOmmer)
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// Add (8-delta)/8
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reward := big.NewInt(8)
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reward.Sub(reward, new(big.Int).SetUint64(ommer.Delta))
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reward.Mul(reward, blockReward)
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reward.Div(reward, big.NewInt(8))
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statedb.AddBalance(ommer.Address, reward)
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}
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statedb.AddBalance(pre.Env.Coinbase, minerReward)
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}
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// Commit block
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root, err := statedb.Commit(chainConfig.IsEIP158(vmContext.BlockNumber))
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if err != nil {
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fmt.Fprintf(os.Stderr, "Could not commit state: %v", err)
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return nil, nil, NewError(ErrorEVM, fmt.Errorf("could not commit state: %v", err))
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}
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execRs := &ExecutionResult{
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StateRoot: root,
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TxRoot: types.DeriveSha(includedTxs, trie.NewStackTrie(nil)),
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ReceiptRoot: types.DeriveSha(receipts, trie.NewStackTrie(nil)),
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Bloom: types.CreateBloom(receipts),
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LogsHash: rlpHash(statedb.Logs()),
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Receipts: receipts,
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Rejected: rejectedTxs,
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Difficulty: (*math.HexOrDecimal256)(vmContext.Difficulty),
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GasUsed: (math.HexOrDecimal64)(gasUsed),
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BaseFee: (*math.HexOrDecimal256)(vmContext.BaseFee),
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}
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return statedb, execRs, nil
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}
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func MakePreState(db ethdb.Database, accounts core.GenesisAlloc) *state.StateDB {
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sdb := state.NewDatabaseWithConfig(db, &trie.Config{Preimages: true})
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statedb, _ := state.New(common.Hash{}, sdb, nil)
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for addr, a := range accounts {
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statedb.SetCode(addr, a.Code)
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statedb.SetNonce(addr, a.Nonce)
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statedb.SetBalance(addr, a.Balance)
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for k, v := range a.Storage {
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statedb.SetState(addr, k, v)
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}
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}
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// Commit and re-open to start with a clean state.
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root, _ := statedb.Commit(false)
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statedb, _ = state.New(root, sdb, nil)
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return statedb
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}
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func rlpHash(x interface{}) (h common.Hash) {
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hw := sha3.NewLegacyKeccak256()
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rlp.Encode(hw, x)
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hw.Sum(h[:0])
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return h
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}
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// calcDifficulty is based on ethash.CalcDifficulty. This method is used in case
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// the caller does not provide an explicit difficulty, but instead provides only
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// parent timestamp + difficulty.
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// Note: this method only works for ethash engine.
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func calcDifficulty(config *params.ChainConfig, number, currentTime, parentTime uint64,
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parentDifficulty *big.Int, parentUncleHash common.Hash) *big.Int {
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uncleHash := parentUncleHash
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if uncleHash == (common.Hash{}) {
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uncleHash = types.EmptyUncleHash
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}
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parent := &types.Header{
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ParentHash: common.Hash{},
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UncleHash: uncleHash,
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Difficulty: parentDifficulty,
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Number: new(big.Int).SetUint64(number - 1),
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Time: parentTime,
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}
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return ethash.CalcDifficulty(config, currentTime, parent)
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}
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