612 lines
25 KiB
Go
612 lines
25 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/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 *big.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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BlobFeeCap *big.Int // Is used to zero the blobbasefee if NoBaseFee is set
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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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// 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
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// evm.
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Config Config
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// global (to this context) ethereum virtual machine
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// used throughout the execution of the tx.
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interpreter *EVMInterpreter
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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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}
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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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}
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evm.precompiles = activePrecompiledContracts(evm.chainRules)
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evm.interpreter = NewEVMInterpreter(evm)
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return evm
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}
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// SetTracer sets the tracer for following state transition.
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func (evm *EVM) SetTracer(tracer *tracing.Hooks) {
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evm.Config.Tracer = tracer
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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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// 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(evm.StateDB.PointCache())
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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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// Interpreter returns the current interpreter
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func (evm *EVM) Interpreter() *EVMInterpreter {
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return evm.interpreter
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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 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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func (evm *EVM) Call(caller ContractRef, 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.Address(), 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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if !value.IsZero() && !evm.Context.CanTransfer(evm.StateDB, caller.Address(), 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 {
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// add proof of absence to witness
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wgas := evm.AccessEvents.AddAccount(addr, 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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evm.Context.Transfer(evm.StateDB, caller.Address(), addr, value)
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if isPrecompile {
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ret, gas, err = RunPrecompiledContract(p, 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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code := evm.StateDB.GetCode(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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addrCopy := addr
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// If the account has no code, we can abort here
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// The depth-check is already done, and precompiles handled above
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contract := NewContract(caller, AccountRef(addrCopy), value, gas)
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contract.SetCallCode(&addrCopy, evm.StateDB.GetCodeHash(addrCopy), code)
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ret, err = evm.interpreter.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 ContractRef, 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.Address(), 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.Address(), 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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ret, gas, err = RunPrecompiledContract(p, input, gas, evm.Config.Tracer)
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} else {
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addrCopy := addr
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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, AccountRef(caller.Address()), value, gas)
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contract.SetCallCode(&addrCopy, evm.StateDB.GetCodeHash(addrCopy), evm.StateDB.GetCode(addrCopy))
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ret, err = evm.interpreter.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(caller ContractRef, 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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// NOTE: caller must, at all times be a contract. It should never happen
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// that caller is something other than a Contract.
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parent := caller.(*Contract)
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// DELEGATECALL inherits value from parent call
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evm.captureBegin(evm.depth, DELEGATECALL, caller.Address(), addr, input, gas, parent.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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ret, gas, err = RunPrecompiledContract(p, input, gas, evm.Config.Tracer)
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} else {
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addrCopy := addr
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// Initialise a new contract and make initialise the delegate values
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contract := NewContract(caller, AccountRef(caller.Address()), nil, gas).AsDelegate()
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contract.SetCallCode(&addrCopy, evm.StateDB.GetCodeHash(addrCopy), evm.StateDB.GetCode(addrCopy))
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ret, err = evm.interpreter.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 ContractRef, 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.Address(), 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.
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// However, even a staticcall is considered a 'touch'. On mainnet, static calls were introduced
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// after all empty accounts were deleted, so this is not required. However, if we omit this,
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// then certain tests start failing; stRevertTest/RevertPrecompiledTouchExactOOG.json.
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// We could change this, but for now it's left for legacy reasons
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var snapshot = evm.StateDB.Snapshot()
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// We do an AddBalance of zero here, just in order to trigger a touch.
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// This doesn't matter on Mainnet, where all empties are gone at the time of Byzantium,
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// but is the correct thing to do and matters on other networks, in tests, and potential
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// future scenarios
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evm.StateDB.AddBalance(addr, new(uint256.Int), tracing.BalanceChangeTouchAccount)
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if p, isPrecompile := evm.precompile(addr); isPrecompile {
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ret, gas, err = RunPrecompiledContract(p, input, gas, evm.Config.Tracer)
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} else {
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// At this point, we use a copy of address. If we don't, the go compiler will
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// leak the 'contract' to the outer scope, and make allocation for 'contract'
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// even if the actual execution ends on RunPrecompiled above.
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addrCopy := addr
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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, AccountRef(addrCopy), new(uint256.Int), gas)
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contract.SetCallCode(&addrCopy, evm.StateDB.GetCodeHash(addrCopy), evm.StateDB.GetCode(addrCopy))
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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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ret, err = evm.interpreter.Run(contract, input, true)
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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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type codeAndHash struct {
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code []byte
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hash common.Hash
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}
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func (c *codeAndHash) Hash() common.Hash {
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if c.hash == (common.Hash{}) {
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c.hash = crypto.Keccak256Hash(c.code)
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}
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return c.hash
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}
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// create creates a new contract using code as deployment code.
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func (evm *EVM) create(caller ContractRef, codeAndHash *codeAndHash, gas uint64, value *uint256.Int, address common.Address, typ OpCode) (ret []byte, createAddress common.Address, leftOverGas uint64, err error) {
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if evm.Config.Tracer != nil {
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evm.captureBegin(evm.depth, typ, caller.Address(), address, codeAndHash.code, 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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// Depth check execution. Fail if we're trying to execute above the
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// limit.
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if evm.depth > int(params.CallCreateDepth) {
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return nil, common.Address{}, gas, ErrDepth
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}
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if !evm.Context.CanTransfer(evm.StateDB, caller.Address(), value) {
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return nil, common.Address{}, gas, ErrInsufficientBalance
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}
|
|
nonce := evm.StateDB.GetNonce(caller.Address())
|
|
if nonce+1 < nonce {
|
|
return nil, common.Address{}, gas, ErrNonceUintOverflow
|
|
}
|
|
evm.StateDB.SetNonce(caller.Address(), nonce+1)
|
|
|
|
// Charge the contract creation init gas in verkle mode
|
|
if evm.chainRules.IsEIP4762 {
|
|
statelessGas := evm.AccessEvents.ContractCreatePreCheckGas(address)
|
|
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)
|
|
}
|
|
// Charge the contract creation init gas in verkle mode
|
|
if evm.chainRules.IsEIP4762 {
|
|
statelessGas := evm.AccessEvents.ContractCreateInitGas(address)
|
|
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.GasChangeWitnessContractInit)
|
|
}
|
|
gas = gas - statelessGas
|
|
}
|
|
evm.Context.Transfer(evm.StateDB, caller.Address(), 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, AccountRef(address), value, gas)
|
|
contract.SetCodeOptionalHash(&address, codeAndHash)
|
|
contract.IsDeployment = true
|
|
|
|
ret, err = evm.initNewContract(contract, address, value)
|
|
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, value *uint256.Int) ([]byte, error) {
|
|
ret, err := evm.interpreter.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 {
|
|
if len(ret) > 0 && !contract.UseGas(evm.AccessEvents.CodeChunksRangeGas(address, 0, uint64(len(ret)), uint64(len(ret)), true), evm.Config.Tracer, tracing.GasChangeWitnessCodeChunk) {
|
|
return ret, ErrCodeStoreOutOfGas
|
|
}
|
|
}
|
|
|
|
evm.StateDB.SetCode(address, ret)
|
|
return ret, nil
|
|
}
|
|
|
|
// Create creates a new contract using code as deployment code.
|
|
func (evm *EVM) Create(caller ContractRef, code []byte, gas uint64, value *uint256.Int) (ret []byte, contractAddr common.Address, leftOverGas uint64, err error) {
|
|
contractAddr = crypto.CreateAddress(caller.Address(), evm.StateDB.GetNonce(caller.Address()))
|
|
return evm.create(caller, &codeAndHash{code: 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 ContractRef, code []byte, gas uint64, endowment *uint256.Int, salt *uint256.Int) (ret []byte, contractAddr common.Address, leftOverGas uint64, err error) {
|
|
codeAndHash := &codeAndHash{code: code}
|
|
contractAddr = crypto.CreateAddress2(caller.Address(), salt.Bytes32(), codeAndHash.Hash().Bytes())
|
|
return evm.create(caller, codeAndHash, gas, endowment, contractAddr, CREATE2)
|
|
}
|
|
|
|
// 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,
|
|
}
|
|
}
|