mirror of
https://github.com/ethereum/go-ethereum.git
synced 2026-04-14 13:48:37 +00:00
527ea11e50
runtime.setDefaults was unconditionally assigning cfg.Random =
&common.Hash{}, which silently overwrote any caller-provided Random
value. This made it impossible to simulate a specific PREVRANDAO and
also forced post-merge rules whenever London was active, regardless of
the intended environment.
This change only initializes cfg.Random when it is nil, matching how
other fields in Config are defaulted. Existing callers that did not set
Random keep the same behavior (a non-nil zero hash still enables
post-merge semantics), while callers that explicitly set Random now get
their value respected.
227 lines
7.7 KiB
Go
227 lines
7.7 KiB
Go
// Copyright 2015 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 runtime
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import (
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"math"
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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/core/state"
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"github.com/ethereum/go-ethereum/core/tracing"
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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/params"
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"github.com/holiman/uint256"
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)
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// Config is a basic type specifying certain configuration flags for running
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// the EVM.
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type Config struct {
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ChainConfig *params.ChainConfig
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Difficulty *big.Int
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Origin common.Address
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Coinbase common.Address
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BlockNumber *big.Int
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Time uint64
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GasLimit uint64
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GasPrice *big.Int
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Value *big.Int
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Debug bool
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EVMConfig vm.Config
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BaseFee *big.Int
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BlobBaseFee *big.Int
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BlobHashes []common.Hash
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BlobFeeCap *big.Int
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Random *common.Hash
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State *state.StateDB
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GetHashFn func(n uint64) common.Hash
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}
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// sets defaults on the config
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func setDefaults(cfg *Config) {
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if cfg.ChainConfig == nil {
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var (
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shanghaiTime = uint64(0)
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cancunTime = uint64(0)
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)
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cfg.ChainConfig = ¶ms.ChainConfig{
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ChainID: big.NewInt(1),
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HomesteadBlock: new(big.Int),
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DAOForkBlock: new(big.Int),
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DAOForkSupport: false,
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EIP150Block: new(big.Int),
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EIP155Block: new(big.Int),
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EIP158Block: new(big.Int),
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ByzantiumBlock: new(big.Int),
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ConstantinopleBlock: new(big.Int),
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PetersburgBlock: new(big.Int),
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IstanbulBlock: new(big.Int),
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MuirGlacierBlock: new(big.Int),
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BerlinBlock: new(big.Int),
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LondonBlock: new(big.Int),
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ArrowGlacierBlock: nil,
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GrayGlacierBlock: nil,
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TerminalTotalDifficulty: big.NewInt(0),
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MergeNetsplitBlock: nil,
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ShanghaiTime: &shanghaiTime,
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CancunTime: &cancunTime}
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}
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if cfg.Difficulty == nil {
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cfg.Difficulty = new(big.Int)
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}
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if cfg.GasLimit == 0 {
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cfg.GasLimit = math.MaxUint64
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}
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if cfg.GasPrice == nil {
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cfg.GasPrice = new(big.Int)
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}
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if cfg.Value == nil {
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cfg.Value = new(big.Int)
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}
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if cfg.BlockNumber == nil {
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cfg.BlockNumber = new(big.Int)
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}
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if cfg.GetHashFn == nil {
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cfg.GetHashFn = func(n uint64) common.Hash {
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return common.BytesToHash(crypto.Keccak256([]byte(new(big.Int).SetUint64(n).String())))
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}
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}
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if cfg.BaseFee == nil {
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cfg.BaseFee = big.NewInt(params.InitialBaseFee)
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}
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if cfg.BlobBaseFee == nil {
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cfg.BlobBaseFee = big.NewInt(params.BlobTxMinBlobGasprice)
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}
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if cfg.Random == nil {
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cfg.Random = new(common.Hash)
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}
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}
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// Execute executes the code using the input as call data during the execution.
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// It returns the EVM's return value, the new state and an error if it failed.
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//
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// Execute sets up an in-memory, temporary, environment for the execution of
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// the given code. It makes sure that it's restored to its original state afterwards.
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func Execute(code, input []byte, cfg *Config) ([]byte, *state.StateDB, error) {
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if cfg == nil {
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cfg = new(Config)
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}
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setDefaults(cfg)
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if cfg.State == nil {
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cfg.State, _ = state.New(types.EmptyRootHash, state.NewDatabaseForTesting())
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}
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var (
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address = common.BytesToAddress([]byte("contract"))
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vmenv = NewEnv(cfg)
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rules = cfg.ChainConfig.Rules(vmenv.Context.BlockNumber, vmenv.Context.Random != nil, vmenv.Context.Time)
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)
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if cfg.EVMConfig.Tracer != nil && cfg.EVMConfig.Tracer.OnTxStart != nil {
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cfg.EVMConfig.Tracer.OnTxStart(vmenv.GetVMContext(), types.NewTx(&types.LegacyTx{To: &address, Data: input, Value: cfg.Value, Gas: cfg.GasLimit}), cfg.Origin)
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}
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// Execute the preparatory steps for state transition which includes:
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// - prepare accessList(post-berlin)
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// - reset transient storage(eip 1153)
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cfg.State.Prepare(rules, cfg.Origin, cfg.Coinbase, &address, vm.ActivePrecompiles(rules), nil)
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cfg.State.CreateAccount(address)
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// set the receiver's (the executing contract) code for execution.
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cfg.State.SetCode(address, code, tracing.CodeChangeUnspecified)
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// Call the code with the given configuration.
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ret, leftOverGas, err := vmenv.Call(
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cfg.Origin,
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common.BytesToAddress([]byte("contract")),
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input,
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cfg.GasLimit,
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uint256.MustFromBig(cfg.Value),
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)
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if cfg.EVMConfig.Tracer != nil && cfg.EVMConfig.Tracer.OnTxEnd != nil {
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cfg.EVMConfig.Tracer.OnTxEnd(&types.Receipt{GasUsed: cfg.GasLimit - leftOverGas}, err)
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}
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return ret, cfg.State, err
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}
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// Create executes the code using the EVM create method
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func Create(input []byte, cfg *Config) ([]byte, common.Address, uint64, error) {
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if cfg == nil {
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cfg = new(Config)
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}
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setDefaults(cfg)
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if cfg.State == nil {
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cfg.State, _ = state.New(types.EmptyRootHash, state.NewDatabaseForTesting())
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}
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var (
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vmenv = NewEnv(cfg)
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rules = cfg.ChainConfig.Rules(vmenv.Context.BlockNumber, vmenv.Context.Random != nil, vmenv.Context.Time)
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)
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if cfg.EVMConfig.Tracer != nil && cfg.EVMConfig.Tracer.OnTxStart != nil {
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cfg.EVMConfig.Tracer.OnTxStart(vmenv.GetVMContext(), types.NewTx(&types.LegacyTx{Data: input, Value: cfg.Value, Gas: cfg.GasLimit}), cfg.Origin)
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}
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// Execute the preparatory steps for state transition which includes:
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// - prepare accessList(post-berlin)
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// - reset transient storage(eip 1153)
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cfg.State.Prepare(rules, cfg.Origin, cfg.Coinbase, nil, vm.ActivePrecompiles(rules), nil)
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// Call the code with the given configuration.
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code, address, leftOverGas, err := vmenv.Create(
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cfg.Origin,
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input,
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cfg.GasLimit,
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uint256.MustFromBig(cfg.Value),
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)
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if cfg.EVMConfig.Tracer != nil && cfg.EVMConfig.Tracer.OnTxEnd != nil {
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cfg.EVMConfig.Tracer.OnTxEnd(&types.Receipt{GasUsed: cfg.GasLimit - leftOverGas}, err)
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}
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return code, address, leftOverGas, err
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}
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// Call executes the code given by the contract's address. It will return the
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// EVM's return value or an error if it failed.
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//
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// Call, unlike Execute, requires a config and also requires the State field to
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// be set.
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func Call(address common.Address, input []byte, cfg *Config) ([]byte, uint64, error) {
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setDefaults(cfg)
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var (
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vmenv = NewEnv(cfg)
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statedb = cfg.State
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rules = cfg.ChainConfig.Rules(vmenv.Context.BlockNumber, vmenv.Context.Random != nil, vmenv.Context.Time)
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)
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if cfg.EVMConfig.Tracer != nil && cfg.EVMConfig.Tracer.OnTxStart != nil {
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cfg.EVMConfig.Tracer.OnTxStart(vmenv.GetVMContext(), types.NewTx(&types.LegacyTx{To: &address, Data: input, Value: cfg.Value, Gas: cfg.GasLimit}), cfg.Origin)
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}
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// Execute the preparatory steps for state transition which includes:
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// - prepare accessList(post-berlin)
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// - reset transient storage(eip 1153)
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statedb.Prepare(rules, cfg.Origin, cfg.Coinbase, &address, vm.ActivePrecompiles(rules), nil)
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// Call the code with the given configuration.
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ret, leftOverGas, err := vmenv.Call(
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cfg.Origin,
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address,
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input,
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cfg.GasLimit,
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uint256.MustFromBig(cfg.Value),
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)
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if cfg.EVMConfig.Tracer != nil && cfg.EVMConfig.Tracer.OnTxEnd != nil {
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cfg.EVMConfig.Tracer.OnTxEnd(&types.Receipt{GasUsed: cfg.GasLimit - leftOverGas}, err)
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}
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return ret, leftOverGas, err
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}
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