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https://github.com/ethereum/go-ethereum.git
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cbf3d8fed2
https://eips.ethereum.org/EIPS/eip-7928 spec: > Precompiled contracts: Precompiles MUST be included when accessed. If a precompile receives value, it is recorded with a balance change. Otherwise, it is included with empty change lists. The precompiled contracts are not explicitly touched when they are invoked since Amsterdam fork.
711 lines
28 KiB
Go
711 lines
28 KiB
Go
// Copyright 2014 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 vm
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import (
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"errors"
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"math/big"
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"sync/atomic"
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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/crypto"
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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/holiman/uint256"
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)
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type (
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// CanTransferFunc is the signature of a transfer guard function
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CanTransferFunc func(StateDB, common.Address, *uint256.Int) bool
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// TransferFunc is the signature of a transfer function
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TransferFunc func(StateDB, common.Address, common.Address, *uint256.Int)
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// GetHashFunc returns the n'th block hash in the blockchain
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// and is used by the BLOCKHASH EVM op code.
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GetHashFunc func(uint64) common.Hash
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)
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func (evm *EVM) precompile(addr common.Address) (PrecompiledContract, bool) {
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p, ok := evm.precompiles[addr]
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return p, ok
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}
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// BlockContext provides the EVM with auxiliary information. Once provided
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// it shouldn't be modified.
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type BlockContext struct {
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// CanTransfer returns whether the account contains
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// sufficient ether to transfer the value
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CanTransfer CanTransferFunc
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// Transfer transfers ether from one account to the other
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Transfer TransferFunc
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// GetHash returns the hash corresponding to n
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GetHash GetHashFunc
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// Block information
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Coinbase common.Address // Provides information for COINBASE
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GasLimit uint64 // Provides information for GASLIMIT
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BlockNumber *big.Int // Provides information for NUMBER
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Time uint64 // Provides information for TIME
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Difficulty *big.Int // Provides information for DIFFICULTY
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BaseFee *big.Int // Provides information for BASEFEE (0 if vm runs with NoBaseFee flag and 0 gas price)
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BlobBaseFee *big.Int // Provides information for BLOBBASEFEE (0 if vm runs with NoBaseFee flag and 0 blob gas price)
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Random *common.Hash // Provides information for PREVRANDAO
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}
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// TxContext provides the EVM with information about a transaction.
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// All fields can change between transactions.
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type TxContext struct {
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// Message information
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Origin common.Address // Provides information for ORIGIN
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GasPrice *uint256.Int // Provides information for GASPRICE (and is used to zero the basefee if NoBaseFee is set)
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BlobHashes []common.Hash // Provides information for BLOBHASH
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AccessEvents *state.AccessEvents // Capture all state accesses for this tx
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}
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// EVM is the Ethereum Virtual Machine base object and provides
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// the necessary tools to run a contract on the given state with
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// the provided context. It should be noted that any error
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// generated through any of the calls should be considered a
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// revert-state-and-consume-all-gas operation, no checks on
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// specific errors should ever be performed. The interpreter makes
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// sure that any errors generated are to be considered faulty code.
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//
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// The EVM should never be reused and is not thread safe.
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type EVM struct {
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// Context provides auxiliary blockchain related information
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Context BlockContext
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TxContext
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// StateDB gives access to the underlying state
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StateDB StateDB
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// table holds the opcode specific handlers
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table *JumpTable
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// depth is the current call stack
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depth int
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// chainConfig contains information about the current chain
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chainConfig *params.ChainConfig
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// chain rules contains the chain rules for the current epoch
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chainRules params.Rules
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// virtual machine configuration options used to initialise the evm
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Config Config
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// abort is used to abort the EVM calling operations
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abort atomic.Bool
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// callGasTemp holds the gas available for the current call. This is needed because the
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// available gas is calculated in gasCall* according to the 63/64 rule and later
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// applied in opCall*.
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callGasTemp uint64
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// precompiles holds the precompiled contracts for the current epoch
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precompiles map[common.Address]PrecompiledContract
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// jumpDests stores results of JUMPDEST analysis.
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jumpDests JumpDestCache
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readOnly bool // Whether to throw on stateful modifications
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returnData []byte // Last CALL's return data for subsequent reuse
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}
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// NewEVM constructs an EVM instance with the supplied block context, state
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// database and several configs. It meant to be used throughout the entire
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// state transition of a block, with the transaction context switched as
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// needed by calling evm.SetTxContext.
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func NewEVM(blockCtx BlockContext, statedb StateDB, chainConfig *params.ChainConfig, config Config) *EVM {
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evm := &EVM{
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Context: blockCtx,
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StateDB: statedb,
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Config: config,
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chainConfig: chainConfig,
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chainRules: chainConfig.Rules(blockCtx.BlockNumber, blockCtx.Random != nil, blockCtx.Time),
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jumpDests: newMapJumpDests(),
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}
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evm.precompiles = activePrecompiledContracts(evm.chainRules)
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switch {
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case evm.chainRules.IsOsaka:
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evm.table = &osakaInstructionSet
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case evm.chainRules.IsVerkle:
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// TODO replace with proper instruction set when fork is specified
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evm.table = &verkleInstructionSet
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case evm.chainRules.IsPrague:
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evm.table = &pragueInstructionSet
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case evm.chainRules.IsCancun:
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evm.table = &cancunInstructionSet
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case evm.chainRules.IsShanghai:
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evm.table = &shanghaiInstructionSet
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case evm.chainRules.IsMerge:
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evm.table = &mergeInstructionSet
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case evm.chainRules.IsLondon:
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evm.table = &londonInstructionSet
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case evm.chainRules.IsBerlin:
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evm.table = &berlinInstructionSet
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case evm.chainRules.IsIstanbul:
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evm.table = &istanbulInstructionSet
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case evm.chainRules.IsConstantinople:
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evm.table = &constantinopleInstructionSet
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case evm.chainRules.IsByzantium:
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evm.table = &byzantiumInstructionSet
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case evm.chainRules.IsEIP158:
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evm.table = &spuriousDragonInstructionSet
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case evm.chainRules.IsEIP150:
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evm.table = &tangerineWhistleInstructionSet
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case evm.chainRules.IsHomestead:
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evm.table = &homesteadInstructionSet
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default:
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evm.table = &frontierInstructionSet
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}
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var extraEips []int
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if len(evm.Config.ExtraEips) > 0 {
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// Deep-copy jumptable to prevent modification of opcodes in other tables
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evm.table = copyJumpTable(evm.table)
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}
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for _, eip := range evm.Config.ExtraEips {
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if err := EnableEIP(eip, evm.table); err != nil {
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// Disable it, so caller can check if it's activated or not
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log.Error("EIP activation failed", "eip", eip, "error", err)
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} else {
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extraEips = append(extraEips, eip)
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}
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}
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evm.Config.ExtraEips = extraEips
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return evm
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}
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// SetPrecompiles sets the precompiled contracts for the EVM.
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// This method is only used through RPC calls.
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// It is not thread-safe.
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func (evm *EVM) SetPrecompiles(precompiles PrecompiledContracts) {
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evm.precompiles = precompiles
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}
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// SetJumpDestCache configures the analysis cache.
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func (evm *EVM) SetJumpDestCache(jumpDests JumpDestCache) {
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evm.jumpDests = jumpDests
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}
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// SetTxContext resets the EVM with a new transaction context.
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// This is not threadsafe and should only be done very cautiously.
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func (evm *EVM) SetTxContext(txCtx TxContext) {
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if evm.chainRules.IsEIP4762 {
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txCtx.AccessEvents = state.NewAccessEvents()
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}
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evm.TxContext = txCtx
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}
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// Cancel cancels any running EVM operation. This may be called concurrently and
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// it's safe to be called multiple times.
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func (evm *EVM) Cancel() {
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evm.abort.Store(true)
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}
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// Cancelled returns true if Cancel has been called
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func (evm *EVM) Cancelled() bool {
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return evm.abort.Load()
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}
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func isSystemCall(caller common.Address) bool {
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return caller == params.SystemAddress
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}
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// Call executes the contract associated with the addr with the given input as
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// parameters. It also handles any necessary value transfer required and takse
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// the necessary steps to create accounts and reverses the state in case of an
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// execution error or failed value transfer.
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func (evm *EVM) Call(caller common.Address, addr common.Address, input []byte, gas uint64, value *uint256.Int) (ret []byte, leftOverGas uint64, err error) {
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// Capture the tracer start/end events in debug mode
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if evm.Config.Tracer != nil {
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evm.captureBegin(evm.depth, CALL, caller, addr, input, gas, value.ToBig())
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defer func(startGas uint64) {
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evm.captureEnd(evm.depth, startGas, leftOverGas, ret, err)
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}(gas)
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}
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// Fail if we're trying to execute above the call depth limit
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if evm.depth > int(params.CallCreateDepth) {
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return nil, gas, ErrDepth
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}
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syscall := isSystemCall(caller)
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// Fail if we're trying to transfer more than the available balance.
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if !syscall && !value.IsZero() && !evm.Context.CanTransfer(evm.StateDB, caller, value) {
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return nil, gas, ErrInsufficientBalance
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}
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snapshot := evm.StateDB.Snapshot()
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p, isPrecompile := evm.precompile(addr)
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if !evm.StateDB.Exist(addr) {
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if !isPrecompile && evm.chainRules.IsEIP4762 && !isSystemCall(caller) {
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// Add proof of absence to witness
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// At this point, the read costs have already been charged, either because this
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// is a direct tx call, in which case it's covered by the intrinsic gas, or because
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// of a CALL instruction, in which case BASIC_DATA has been added to the access
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// list in write mode. If there is enough gas paying for the addition of the code
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// hash leaf to the access list, then account creation will proceed unimpaired.
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// Thus, only pay for the creation of the code hash leaf here.
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wgas := evm.AccessEvents.CodeHashGas(addr, true, gas, false)
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if gas < wgas {
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evm.StateDB.RevertToSnapshot(snapshot)
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return nil, 0, ErrOutOfGas
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}
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gas -= wgas
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}
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if !isPrecompile && evm.chainRules.IsEIP158 && value.IsZero() {
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// Calling a non-existing account, don't do anything.
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return nil, gas, nil
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}
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evm.StateDB.CreateAccount(addr)
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}
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// Perform the value transfer only in non-syscall mode.
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// Calling this is required even for zero-value transfers,
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// to ensure the state clearing mechanism is applied.
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if !syscall {
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evm.Context.Transfer(evm.StateDB, caller, addr, value)
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}
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if isPrecompile {
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var stateDB StateDB
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if evm.chainRules.IsAmsterdam {
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stateDB = evm.StateDB
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}
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ret, gas, err = RunPrecompiledContract(stateDB, p, addr, input, gas, evm.Config.Tracer)
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} else {
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// Initialise a new contract and set the code that is to be used by the EVM.
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code := evm.resolveCode(addr)
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if len(code) == 0 {
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ret, err = nil, nil // gas is unchanged
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} else {
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// The contract is a scoped environment for this execution context only.
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contract := NewContract(caller, addr, value, gas, evm.jumpDests)
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contract.IsSystemCall = isSystemCall(caller)
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contract.SetCallCode(evm.resolveCodeHash(addr), code)
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ret, err = evm.Run(contract, input, false)
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gas = contract.Gas
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}
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}
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// When an error was returned by the EVM or when setting the creation code
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// above we revert to the snapshot and consume any gas remaining. Additionally,
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// when we're in homestead this also counts for code storage gas errors.
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if err != nil {
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evm.StateDB.RevertToSnapshot(snapshot)
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if err != ErrExecutionReverted {
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if evm.Config.Tracer != nil && evm.Config.Tracer.OnGasChange != nil {
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evm.Config.Tracer.OnGasChange(gas, 0, tracing.GasChangeCallFailedExecution)
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}
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gas = 0
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}
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// TODO: consider clearing up unused snapshots:
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//} else {
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// evm.StateDB.DiscardSnapshot(snapshot)
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}
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return ret, gas, err
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}
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// CallCode executes the contract associated with the addr with the given input
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// as parameters. It also handles any necessary value transfer required and takes
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// the necessary steps to create accounts and reverses the state in case of an
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// execution error or failed value transfer.
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//
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// CallCode differs from Call in the sense that it executes the given address'
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// code with the caller as context.
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func (evm *EVM) CallCode(caller common.Address, addr common.Address, input []byte, gas uint64, value *uint256.Int) (ret []byte, leftOverGas uint64, err error) {
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// Invoke tracer hooks that signal entering/exiting a call frame
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if evm.Config.Tracer != nil {
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evm.captureBegin(evm.depth, CALLCODE, caller, addr, input, gas, value.ToBig())
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defer func(startGas uint64) {
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evm.captureEnd(evm.depth, startGas, leftOverGas, ret, err)
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}(gas)
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}
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// Fail if we're trying to execute above the call depth limit
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if evm.depth > int(params.CallCreateDepth) {
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return nil, gas, ErrDepth
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}
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// Fail if we're trying to transfer more than the available balance
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// Note although it's noop to transfer X ether to caller itself. But
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// if caller doesn't have enough balance, it would be an error to allow
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// over-charging itself. So the check here is necessary.
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if !evm.Context.CanTransfer(evm.StateDB, caller, value) {
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return nil, gas, ErrInsufficientBalance
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}
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var snapshot = evm.StateDB.Snapshot()
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// It is allowed to call precompiles, even via delegatecall
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if p, isPrecompile := evm.precompile(addr); isPrecompile {
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var stateDB StateDB
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if evm.chainRules.IsAmsterdam {
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stateDB = evm.StateDB
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}
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ret, gas, err = RunPrecompiledContract(stateDB, p, addr, input, gas, evm.Config.Tracer)
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} else {
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// Initialise a new contract and set the code that is to be used by the EVM.
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// The contract is a scoped environment for this execution context only.
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contract := NewContract(caller, caller, value, gas, evm.jumpDests)
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contract.SetCallCode(evm.resolveCodeHash(addr), evm.resolveCode(addr))
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ret, err = evm.Run(contract, input, false)
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gas = contract.Gas
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}
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if err != nil {
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evm.StateDB.RevertToSnapshot(snapshot)
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if err != ErrExecutionReverted {
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if evm.Config.Tracer != nil && evm.Config.Tracer.OnGasChange != nil {
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evm.Config.Tracer.OnGasChange(gas, 0, tracing.GasChangeCallFailedExecution)
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}
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gas = 0
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}
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}
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return ret, gas, err
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}
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// DelegateCall executes the contract associated with the addr with the given input
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// as parameters. It reverses the state in case of an execution error.
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//
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// DelegateCall differs from CallCode in the sense that it executes the given address'
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// code with the caller as context and the caller is set to the caller of the caller.
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func (evm *EVM) DelegateCall(originCaller common.Address, caller common.Address, addr common.Address, input []byte, gas uint64, value *uint256.Int) (ret []byte, leftOverGas uint64, err error) {
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// Invoke tracer hooks that signal entering/exiting a call frame
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if evm.Config.Tracer != nil {
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// DELEGATECALL inherits value from parent call
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evm.captureBegin(evm.depth, DELEGATECALL, caller, addr, input, gas, value.ToBig())
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defer func(startGas uint64) {
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evm.captureEnd(evm.depth, startGas, leftOverGas, ret, err)
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}(gas)
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}
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// Fail if we're trying to execute above the call depth limit
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if evm.depth > int(params.CallCreateDepth) {
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return nil, gas, ErrDepth
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}
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var snapshot = evm.StateDB.Snapshot()
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// It is allowed to call precompiles, even via delegatecall
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if p, isPrecompile := evm.precompile(addr); isPrecompile {
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var stateDB StateDB
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if evm.chainRules.IsAmsterdam {
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stateDB = evm.StateDB
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}
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ret, gas, err = RunPrecompiledContract(stateDB, p, addr, input, gas, evm.Config.Tracer)
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} else {
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// Initialise a new contract and make initialise the delegate values
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//
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// Note: The value refers to the original value from the parent call.
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contract := NewContract(originCaller, caller, value, gas, evm.jumpDests)
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contract.SetCallCode(evm.resolveCodeHash(addr), evm.resolveCode(addr))
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ret, err = evm.Run(contract, input, false)
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gas = contract.Gas
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}
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if err != nil {
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evm.StateDB.RevertToSnapshot(snapshot)
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if err != ErrExecutionReverted {
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if evm.Config.Tracer != nil && evm.Config.Tracer.OnGasChange != nil {
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evm.Config.Tracer.OnGasChange(gas, 0, tracing.GasChangeCallFailedExecution)
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}
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gas = 0
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}
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}
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return ret, gas, err
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}
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// StaticCall executes the contract associated with the addr with the given input
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// as parameters while disallowing any modifications to the state during the call.
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// Opcodes that attempt to perform such modifications will result in exceptions
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// instead of performing the modifications.
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func (evm *EVM) StaticCall(caller common.Address, addr common.Address, input []byte, gas uint64) (ret []byte, leftOverGas uint64, err error) {
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// Invoke tracer hooks that signal entering/exiting a call frame
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if evm.Config.Tracer != nil {
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evm.captureBegin(evm.depth, STATICCALL, caller, addr, input, gas, nil)
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defer func(startGas uint64) {
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evm.captureEnd(evm.depth, startGas, leftOverGas, ret, err)
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}(gas)
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}
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// Fail if we're trying to execute above the call depth limit
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if evm.depth > int(params.CallCreateDepth) {
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return nil, gas, ErrDepth
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}
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// We take a snapshot here. This is a bit counter-intuitive, and could probably be skipped.
|
|
// However, even a staticcall is considered a 'touch'. On mainnet, static calls were introduced
|
|
// after all empty accounts were deleted, so this is not required. However, if we omit this,
|
|
// then certain tests start failing; stRevertTest/RevertPrecompiledTouchExactOOG.json.
|
|
// We could change this, but for now it's left for legacy reasons
|
|
var snapshot = evm.StateDB.Snapshot()
|
|
|
|
// We do an AddBalance of zero here, just in order to trigger a touch.
|
|
// This doesn't matter on Mainnet, where all empties are gone at the time of Byzantium,
|
|
// but is the correct thing to do and matters on other networks, in tests, and potential
|
|
// future scenarios
|
|
evm.StateDB.AddBalance(addr, new(uint256.Int), tracing.BalanceChangeTouchAccount)
|
|
|
|
if p, isPrecompile := evm.precompile(addr); isPrecompile {
|
|
var stateDB StateDB
|
|
if evm.chainRules.IsAmsterdam {
|
|
stateDB = evm.StateDB
|
|
}
|
|
ret, gas, err = RunPrecompiledContract(stateDB, p, addr, input, gas, evm.Config.Tracer)
|
|
} else {
|
|
// Initialise a new contract and set the code that is to be used by the EVM.
|
|
// The contract is a scoped environment for this execution context only.
|
|
contract := NewContract(caller, addr, new(uint256.Int), gas, evm.jumpDests)
|
|
contract.SetCallCode(evm.resolveCodeHash(addr), evm.resolveCode(addr))
|
|
|
|
// When an error was returned by the EVM or when setting the creation code
|
|
// above we revert to the snapshot and consume any gas remaining. Additionally
|
|
// when we're in Homestead this also counts for code storage gas errors.
|
|
ret, err = evm.Run(contract, input, true)
|
|
gas = contract.Gas
|
|
}
|
|
if err != nil {
|
|
evm.StateDB.RevertToSnapshot(snapshot)
|
|
if err != ErrExecutionReverted {
|
|
if evm.Config.Tracer != nil && evm.Config.Tracer.OnGasChange != nil {
|
|
evm.Config.Tracer.OnGasChange(gas, 0, tracing.GasChangeCallFailedExecution)
|
|
}
|
|
|
|
gas = 0
|
|
}
|
|
}
|
|
return ret, gas, err
|
|
}
|
|
|
|
// create creates a new contract using code as deployment code.
|
|
func (evm *EVM) create(caller common.Address, code []byte, gas uint64, value *uint256.Int, address common.Address, typ OpCode) (ret []byte, createAddress common.Address, leftOverGas uint64, err error) {
|
|
if evm.Config.Tracer != nil {
|
|
evm.captureBegin(evm.depth, typ, caller, address, code, gas, value.ToBig())
|
|
defer func(startGas uint64) {
|
|
evm.captureEnd(evm.depth, startGas, leftOverGas, ret, err)
|
|
}(gas)
|
|
}
|
|
// Depth check execution. Fail if we're trying to execute above the
|
|
// limit.
|
|
if evm.depth > int(params.CallCreateDepth) {
|
|
return nil, common.Address{}, gas, ErrDepth
|
|
}
|
|
if !evm.Context.CanTransfer(evm.StateDB, caller, value) {
|
|
return nil, common.Address{}, gas, ErrInsufficientBalance
|
|
}
|
|
nonce := evm.StateDB.GetNonce(caller)
|
|
if nonce+1 < nonce {
|
|
return nil, common.Address{}, gas, ErrNonceUintOverflow
|
|
}
|
|
evm.StateDB.SetNonce(caller, nonce+1, tracing.NonceChangeContractCreator)
|
|
|
|
// Charge the contract creation init gas in verkle mode
|
|
if evm.chainRules.IsEIP4762 {
|
|
statelessGas := evm.AccessEvents.ContractCreatePreCheckGas(address, gas)
|
|
if statelessGas > gas {
|
|
return nil, common.Address{}, 0, ErrOutOfGas
|
|
}
|
|
if evm.Config.Tracer != nil && evm.Config.Tracer.OnGasChange != nil {
|
|
evm.Config.Tracer.OnGasChange(gas, gas-statelessGas, tracing.GasChangeWitnessContractCollisionCheck)
|
|
}
|
|
gas = gas - statelessGas
|
|
}
|
|
|
|
// We add this to the access list _before_ taking a snapshot. Even if the
|
|
// creation fails, the access-list change should not be rolled back.
|
|
if evm.chainRules.IsEIP2929 {
|
|
evm.StateDB.AddAddressToAccessList(address)
|
|
}
|
|
// Ensure there's no existing contract already at the designated address.
|
|
// Account is regarded as existent if any of these three conditions is met:
|
|
// - the nonce is non-zero
|
|
// - the code is non-empty
|
|
// - the storage is non-empty
|
|
contractHash := evm.StateDB.GetCodeHash(address)
|
|
storageRoot := evm.StateDB.GetStorageRoot(address)
|
|
if evm.StateDB.GetNonce(address) != 0 ||
|
|
(contractHash != (common.Hash{}) && contractHash != types.EmptyCodeHash) || // non-empty code
|
|
(storageRoot != (common.Hash{}) && storageRoot != types.EmptyRootHash) { // non-empty storage
|
|
if evm.Config.Tracer != nil && evm.Config.Tracer.OnGasChange != nil {
|
|
evm.Config.Tracer.OnGasChange(gas, 0, tracing.GasChangeCallFailedExecution)
|
|
}
|
|
return nil, common.Address{}, 0, ErrContractAddressCollision
|
|
}
|
|
// Create a new account on the state only if the object was not present.
|
|
// It might be possible the contract code is deployed to a pre-existent
|
|
// account with non-zero balance.
|
|
snapshot := evm.StateDB.Snapshot()
|
|
if !evm.StateDB.Exist(address) {
|
|
evm.StateDB.CreateAccount(address)
|
|
}
|
|
// CreateContract means that regardless of whether the account previously existed
|
|
// in the state trie or not, it _now_ becomes created as a _contract_ account.
|
|
// This is performed _prior_ to executing the initcode, since the initcode
|
|
// acts inside that account.
|
|
evm.StateDB.CreateContract(address)
|
|
|
|
if evm.chainRules.IsEIP158 {
|
|
evm.StateDB.SetNonce(address, 1, tracing.NonceChangeNewContract)
|
|
}
|
|
// Charge the contract creation init gas in verkle mode
|
|
if evm.chainRules.IsEIP4762 {
|
|
consumed, wanted := evm.AccessEvents.ContractCreateInitGas(address, gas)
|
|
if consumed < wanted {
|
|
return nil, common.Address{}, 0, ErrOutOfGas
|
|
}
|
|
if evm.Config.Tracer != nil && evm.Config.Tracer.OnGasChange != nil {
|
|
evm.Config.Tracer.OnGasChange(gas, gas-consumed, tracing.GasChangeWitnessContractInit)
|
|
}
|
|
gas = gas - consumed
|
|
}
|
|
evm.Context.Transfer(evm.StateDB, caller, address, value)
|
|
|
|
// Initialise a new contract and set the code that is to be used by the EVM.
|
|
// The contract is a scoped environment for this execution context only.
|
|
contract := NewContract(caller, address, value, gas, evm.jumpDests)
|
|
|
|
// Explicitly set the code to a null hash to prevent caching of jump analysis
|
|
// for the initialization code.
|
|
contract.SetCallCode(common.Hash{}, code)
|
|
contract.IsDeployment = true
|
|
|
|
ret, err = evm.initNewContract(contract, address)
|
|
if err != nil && (evm.chainRules.IsHomestead || err != ErrCodeStoreOutOfGas) {
|
|
evm.StateDB.RevertToSnapshot(snapshot)
|
|
if err != ErrExecutionReverted {
|
|
contract.UseGas(contract.Gas, evm.Config.Tracer, tracing.GasChangeCallFailedExecution)
|
|
}
|
|
}
|
|
return ret, address, contract.Gas, err
|
|
}
|
|
|
|
// initNewContract runs a new contract's creation code, performs checks on the
|
|
// resulting code that is to be deployed, and consumes necessary gas.
|
|
func (evm *EVM) initNewContract(contract *Contract, address common.Address) ([]byte, error) {
|
|
ret, err := evm.Run(contract, nil, false)
|
|
if err != nil {
|
|
return ret, err
|
|
}
|
|
|
|
// Check whether the max code size has been exceeded, assign err if the case.
|
|
if evm.chainRules.IsEIP158 && len(ret) > params.MaxCodeSize {
|
|
return ret, ErrMaxCodeSizeExceeded
|
|
}
|
|
|
|
// Reject code starting with 0xEF if EIP-3541 is enabled.
|
|
if len(ret) >= 1 && ret[0] == 0xEF && evm.chainRules.IsLondon {
|
|
return ret, ErrInvalidCode
|
|
}
|
|
|
|
if !evm.chainRules.IsEIP4762 {
|
|
createDataGas := uint64(len(ret)) * params.CreateDataGas
|
|
if !contract.UseGas(createDataGas, evm.Config.Tracer, tracing.GasChangeCallCodeStorage) {
|
|
return ret, ErrCodeStoreOutOfGas
|
|
}
|
|
} else {
|
|
consumed, wanted := evm.AccessEvents.CodeChunksRangeGas(address, 0, uint64(len(ret)), uint64(len(ret)), true, contract.Gas)
|
|
contract.UseGas(consumed, evm.Config.Tracer, tracing.GasChangeWitnessCodeChunk)
|
|
if len(ret) > 0 && (consumed < wanted) {
|
|
return ret, ErrCodeStoreOutOfGas
|
|
}
|
|
}
|
|
|
|
if len(ret) > 0 {
|
|
evm.StateDB.SetCode(address, ret, tracing.CodeChangeContractCreation)
|
|
}
|
|
return ret, nil
|
|
}
|
|
|
|
// Create creates a new contract using code as deployment code.
|
|
func (evm *EVM) Create(caller common.Address, code []byte, gas uint64, value *uint256.Int) (ret []byte, contractAddr common.Address, leftOverGas uint64, err error) {
|
|
contractAddr = crypto.CreateAddress(caller, evm.StateDB.GetNonce(caller))
|
|
return evm.create(caller, code, gas, value, contractAddr, CREATE)
|
|
}
|
|
|
|
// Create2 creates a new contract using code as deployment code.
|
|
//
|
|
// The different between Create2 with Create is Create2 uses keccak256(0xff ++ msg.sender ++ salt ++ keccak256(init_code))[12:]
|
|
// instead of the usual sender-and-nonce-hash as the address where the contract is initialized at.
|
|
func (evm *EVM) Create2(caller common.Address, code []byte, gas uint64, endowment *uint256.Int, salt *uint256.Int) (ret []byte, contractAddr common.Address, leftOverGas uint64, err error) {
|
|
inithash := crypto.Keccak256Hash(code)
|
|
contractAddr = crypto.CreateAddress2(caller, salt.Bytes32(), inithash[:])
|
|
return evm.create(caller, code, gas, endowment, contractAddr, CREATE2)
|
|
}
|
|
|
|
// resolveCode returns the code associated with the provided account. After
|
|
// Prague, it can also resolve code pointed to by a delegation designator.
|
|
func (evm *EVM) resolveCode(addr common.Address) []byte {
|
|
code := evm.StateDB.GetCode(addr)
|
|
if !evm.chainRules.IsPrague {
|
|
return code
|
|
}
|
|
if target, ok := types.ParseDelegation(code); ok {
|
|
// Note we only follow one level of delegation.
|
|
return evm.StateDB.GetCode(target)
|
|
}
|
|
return code
|
|
}
|
|
|
|
// resolveCodeHash returns the code hash associated with the provided address.
|
|
// After Prague, it can also resolve code hash of the account pointed to by a
|
|
// delegation designator. Although this is not accessible in the EVM it is used
|
|
// internally to associate jumpdest analysis to code.
|
|
func (evm *EVM) resolveCodeHash(addr common.Address) common.Hash {
|
|
if evm.chainRules.IsPrague {
|
|
code := evm.StateDB.GetCode(addr)
|
|
if target, ok := types.ParseDelegation(code); ok {
|
|
// Note we only follow one level of delegation.
|
|
return evm.StateDB.GetCodeHash(target)
|
|
}
|
|
}
|
|
return evm.StateDB.GetCodeHash(addr)
|
|
}
|
|
|
|
// ChainConfig returns the environment's chain configuration
|
|
func (evm *EVM) ChainConfig() *params.ChainConfig { return evm.chainConfig }
|
|
|
|
func (evm *EVM) captureBegin(depth int, typ OpCode, from common.Address, to common.Address, input []byte, startGas uint64, value *big.Int) {
|
|
tracer := evm.Config.Tracer
|
|
if tracer.OnEnter != nil {
|
|
tracer.OnEnter(depth, byte(typ), from, to, input, startGas, value)
|
|
}
|
|
if tracer.OnGasChange != nil {
|
|
tracer.OnGasChange(0, startGas, tracing.GasChangeCallInitialBalance)
|
|
}
|
|
}
|
|
|
|
func (evm *EVM) captureEnd(depth int, startGas uint64, leftOverGas uint64, ret []byte, err error) {
|
|
tracer := evm.Config.Tracer
|
|
if leftOverGas != 0 && tracer.OnGasChange != nil {
|
|
tracer.OnGasChange(leftOverGas, 0, tracing.GasChangeCallLeftOverReturned)
|
|
}
|
|
var reverted bool
|
|
if err != nil {
|
|
reverted = true
|
|
}
|
|
if !evm.chainRules.IsHomestead && errors.Is(err, ErrCodeStoreOutOfGas) {
|
|
reverted = false
|
|
}
|
|
if tracer.OnExit != nil {
|
|
tracer.OnExit(depth, ret, startGas-leftOverGas, VMErrorFromErr(err), reverted)
|
|
}
|
|
}
|
|
|
|
// GetVMContext provides context about the block being executed as well as state
|
|
// to the tracers.
|
|
func (evm *EVM) GetVMContext() *tracing.VMContext {
|
|
return &tracing.VMContext{
|
|
Coinbase: evm.Context.Coinbase,
|
|
BlockNumber: evm.Context.BlockNumber,
|
|
Time: evm.Context.Time,
|
|
Random: evm.Context.Random,
|
|
BaseFee: evm.Context.BaseFee,
|
|
StateDB: evm.StateDB,
|
|
}
|
|
}
|