github.com/tacshi/go-ethereum@v0.0.0-20230616113857-84a434e20921/core/vm/evm.go (about) 1 // Copyright 2014 The go-ethereum Authors 2 // This file is part of the go-ethereum library. 3 // 4 // The go-ethereum library is free software: you can redistribute it and/or modify 5 // it under the terms of the GNU Lesser General Public License as published by 6 // the Free Software Foundation, either version 3 of the License, or 7 // (at your option) any later version. 8 // 9 // The go-ethereum library is distributed in the hope that it will be useful, 10 // but WITHOUT ANY WARRANTY; without even the implied warranty of 11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 // GNU Lesser General Public License for more details. 13 // 14 // You should have received a copy of the GNU Lesser General Public License 15 // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. 16 17 package vm 18 19 import ( 20 "math/big" 21 "sync/atomic" 22 23 "github.com/holiman/uint256" 24 25 "github.com/tacshi/go-ethereum/common" 26 "github.com/tacshi/go-ethereum/crypto" 27 "github.com/tacshi/go-ethereum/params" 28 ) 29 30 // emptyCodeHash is used by create to ensure deployment is disallowed to already 31 // deployed contract addresses (relevant after the account abstraction). 32 var emptyCodeHash = crypto.Keccak256Hash(nil) 33 34 type ( 35 // CanTransferFunc is the signature of a transfer guard function 36 CanTransferFunc func(StateDB, common.Address, *big.Int) bool 37 // TransferFunc is the signature of a transfer function 38 TransferFunc func(StateDB, common.Address, common.Address, *big.Int) 39 // GetHashFunc returns the n'th block hash in the blockchain 40 // and is used by the BLOCKHASH EVM op code. 41 GetHashFunc func(uint64) common.Hash 42 ) 43 44 func (evm *EVM) precompile(addr common.Address) (PrecompiledContract, bool) { 45 var precompiles map[common.Address]PrecompiledContract 46 switch { 47 case evm.chainRules.IsArbitrum: 48 precompiles = PrecompiledContractsArbitrum 49 case evm.chainRules.IsBerlin: 50 precompiles = PrecompiledContractsBerlin 51 case evm.chainRules.IsIstanbul: 52 precompiles = PrecompiledContractsIstanbul 53 case evm.chainRules.IsByzantium: 54 precompiles = PrecompiledContractsByzantium 55 default: 56 precompiles = PrecompiledContractsHomestead 57 } 58 p, ok := precompiles[addr] 59 return p, ok 60 } 61 62 // BlockContext provides the EVM with auxiliary information. Once provided 63 // it shouldn't be modified. 64 type BlockContext struct { 65 // CanTransfer returns whether the account contains 66 // sufficient ether to transfer the value 67 CanTransfer CanTransferFunc 68 // Transfer transfers ether from one account to the other 69 Transfer TransferFunc 70 // GetHash returns the hash corresponding to n 71 GetHash GetHashFunc 72 73 // Block information 74 Coinbase common.Address // Provides information for COINBASE 75 GasLimit uint64 // Provides information for GASLIMIT 76 BlockNumber *big.Int // Provides information for NUMBER 77 Time uint64 // Provides information for TIME 78 Difficulty *big.Int // Provides information for DIFFICULTY 79 BaseFee *big.Int // Provides information for BASEFEE 80 Random *common.Hash // Provides information for PREVRANDAO 81 82 // Arbitrum information 83 ArbOSVersion uint64 84 } 85 86 // TxContext provides the EVM with information about a transaction. 87 // All fields can change between transactions. 88 type TxContext struct { 89 // Message information 90 Origin common.Address // Provides information for ORIGIN 91 GasPrice *big.Int // Provides information for GASPRICE 92 } 93 94 // EVM is the Ethereum Virtual Machine base object and provides 95 // the necessary tools to run a contract on the given state with 96 // the provided context. It should be noted that any error 97 // generated through any of the calls should be considered a 98 // revert-state-and-consume-all-gas operation, no checks on 99 // specific errors should ever be performed. The interpreter makes 100 // sure that any errors generated are to be considered faulty code. 101 // 102 // The EVM should never be reused and is not thread safe. 103 type EVM struct { 104 ProcessingHook TxProcessingHook 105 106 // Context provides auxiliary blockchain related information 107 Context BlockContext 108 TxContext 109 // StateDB gives access to the underlying state 110 StateDB StateDB 111 // Depth is the current call stack 112 depth int 113 114 // chainConfig contains information about the current chain 115 chainConfig *params.ChainConfig 116 // chain rules contains the chain rules for the current epoch 117 chainRules params.Rules 118 // virtual machine configuration options used to initialise the 119 // evm. 120 Config Config 121 // global (to this context) ethereum virtual machine 122 // used throughout the execution of the tx. 123 interpreter *EVMInterpreter 124 // abort is used to abort the EVM calling operations 125 // NOTE: must be set atomically 126 abort int32 127 // callGasTemp holds the gas available for the current call. This is needed because the 128 // available gas is calculated in gasCall* according to the 63/64 rule and later 129 // applied in opCall*. 130 callGasTemp uint64 131 } 132 133 // NewEVM returns a new EVM. The returned EVM is not thread safe and should 134 // only ever be used *once*. 135 func NewEVM(blockCtx BlockContext, txCtx TxContext, statedb StateDB, chainConfig *params.ChainConfig, config Config) *EVM { 136 evm := &EVM{ 137 Context: blockCtx, 138 TxContext: txCtx, 139 StateDB: statedb, 140 Config: config, 141 chainConfig: chainConfig, 142 chainRules: chainConfig.Rules(blockCtx.BlockNumber, blockCtx.Random != nil, blockCtx.Time, blockCtx.ArbOSVersion), 143 } 144 evm.ProcessingHook = DefaultTxProcessor{evm: evm} 145 evm.interpreter = NewEVMInterpreter(evm) 146 return evm 147 } 148 149 // Reset resets the EVM with a new transaction context.Reset 150 // This is not threadsafe and should only be done very cautiously. 151 func (evm *EVM) Reset(txCtx TxContext, statedb StateDB) { 152 evm.TxContext = txCtx 153 evm.StateDB = statedb 154 } 155 156 // Cancel cancels any running EVM operation. This may be called concurrently and 157 // it's safe to be called multiple times. 158 func (evm *EVM) Cancel() { 159 atomic.StoreInt32(&evm.abort, 1) 160 } 161 162 // Cancelled returns true if Cancel has been called 163 func (evm *EVM) Cancelled() bool { 164 return atomic.LoadInt32(&evm.abort) == 1 165 } 166 167 // Interpreter returns the current interpreter 168 func (evm *EVM) Interpreter() *EVMInterpreter { 169 return evm.interpreter 170 } 171 172 // SetBlockContext updates the block context of the EVM. 173 func (evm *EVM) SetBlockContext(blockCtx BlockContext) { 174 evm.Context = blockCtx 175 num := blockCtx.BlockNumber 176 timestamp := blockCtx.Time 177 evm.chainRules = evm.chainConfig.Rules(num, blockCtx.Random != nil, timestamp, blockCtx.ArbOSVersion) 178 } 179 180 // Call executes the contract associated with the addr with the given input as 181 // parameters. It also handles any necessary value transfer required and takes 182 // the necessary steps to create accounts and reverses the state in case of an 183 // execution error or failed value transfer. 184 func (evm *EVM) Call(caller ContractRef, addr common.Address, input []byte, gas uint64, value *big.Int) (ret []byte, leftOverGas uint64, err error) { 185 // Fail if we're trying to execute above the call depth limit 186 if evm.depth > int(params.CallCreateDepth) { 187 return nil, gas, ErrDepth 188 } 189 // Fail if we're trying to transfer more than the available balance 190 if value.Sign() != 0 && !evm.Context.CanTransfer(evm.StateDB, caller.Address(), value) { 191 return nil, gas, ErrInsufficientBalance 192 } 193 snapshot := evm.StateDB.Snapshot() 194 p, isPrecompile := evm.precompile(addr) 195 196 if !evm.StateDB.Exist(addr) { 197 if !isPrecompile && evm.chainRules.IsEIP158 && value.Sign() == 0 { 198 // Calling a non existing account, don't do anything, but ping the tracer 199 if evm.Config.Debug { 200 if evm.depth == 0 { 201 evm.Config.Tracer.CaptureStart(evm, caller.Address(), addr, false, input, gas, value) 202 evm.Config.Tracer.CaptureEnd(ret, 0, nil) 203 } else { 204 evm.Config.Tracer.CaptureEnter(CALL, caller.Address(), addr, input, gas, value) 205 evm.Config.Tracer.CaptureExit(ret, 0, nil) 206 } 207 } 208 return nil, gas, nil 209 } 210 evm.StateDB.CreateAccount(addr) 211 } 212 evm.Context.Transfer(evm.StateDB, caller.Address(), addr, value) 213 214 // Capture the tracer start/end events in debug mode 215 if evm.Config.Debug { 216 if evm.depth == 0 { 217 evm.Config.Tracer.CaptureStart(evm, caller.Address(), addr, false, input, gas, value) 218 defer func(startGas uint64) { // Lazy evaluation of the parameters 219 evm.Config.Tracer.CaptureEnd(ret, startGas-gas, err) 220 }(gas) 221 } else { 222 // Handle tracer events for entering and exiting a call frame 223 evm.Config.Tracer.CaptureEnter(CALL, caller.Address(), addr, input, gas, value) 224 defer func(startGas uint64) { 225 evm.Config.Tracer.CaptureExit(ret, startGas-gas, err) 226 }(gas) 227 } 228 } 229 230 if isPrecompile { 231 info := &AdvancedPrecompileCall{ 232 PrecompileAddress: addr, 233 ActingAsAddress: addr, 234 Caller: caller.Address(), 235 Value: value, 236 ReadOnly: false, 237 Evm: evm, 238 } 239 ret, gas, err = RunPrecompiledContract(p, input, gas, info) 240 } else { 241 // Initialise a new contract and set the code that is to be used by the EVM. 242 // The contract is a scoped environment for this execution context only. 243 code := evm.StateDB.GetCode(addr) 244 if len(code) == 0 { 245 ret, err = nil, nil // gas is unchanged 246 } else { 247 addrCopy := addr 248 // If the account has no code, we can abort here 249 // The depth-check is already done, and precompiles handled above 250 contract := NewContract(caller, AccountRef(addrCopy), value, gas) 251 contract.SetCallCode(&addrCopy, evm.StateDB.GetCodeHash(addrCopy), code) 252 ret, err = evm.interpreter.Run(contract, input, false) 253 gas = contract.Gas 254 } 255 } 256 // When an error was returned by the EVM or when setting the creation code 257 // above we revert to the snapshot and consume any gas remaining. Additionally 258 // when we're in homestead this also counts for code storage gas errors. 259 if err != nil { 260 evm.StateDB.RevertToSnapshot(snapshot) 261 if err != ErrExecutionReverted { 262 gas = 0 263 } 264 // TODO: consider clearing up unused snapshots: 265 //} else { 266 // evm.StateDB.DiscardSnapshot(snapshot) 267 } 268 return ret, gas, err 269 } 270 271 // CallCode executes the contract associated with the addr with the given input 272 // as parameters. It also handles any necessary value transfer required and takes 273 // the necessary steps to create accounts and reverses the state in case of an 274 // execution error or failed value transfer. 275 // 276 // CallCode differs from Call in the sense that it executes the given address' 277 // code with the caller as context. 278 func (evm *EVM) CallCode(caller ContractRef, addr common.Address, input []byte, gas uint64, value *big.Int) (ret []byte, leftOverGas uint64, err error) { 279 // Fail if we're trying to execute above the call depth limit 280 if evm.depth > int(params.CallCreateDepth) { 281 return nil, gas, ErrDepth 282 } 283 // Fail if we're trying to transfer more than the available balance 284 // Note although it's noop to transfer X ether to caller itself. But 285 // if caller doesn't have enough balance, it would be an error to allow 286 // over-charging itself. So the check here is necessary. 287 if !evm.Context.CanTransfer(evm.StateDB, caller.Address(), value) { 288 return nil, gas, ErrInsufficientBalance 289 } 290 var snapshot = evm.StateDB.Snapshot() 291 292 // Invoke tracer hooks that signal entering/exiting a call frame 293 if evm.Config.Debug { 294 evm.Config.Tracer.CaptureEnter(CALLCODE, caller.Address(), addr, input, gas, value) 295 defer func(startGas uint64) { 296 evm.Config.Tracer.CaptureExit(ret, startGas-gas, err) 297 }(gas) 298 } 299 300 // It is allowed to call precompiles, even via delegatecall 301 if p, isPrecompile := evm.precompile(addr); isPrecompile { 302 info := &AdvancedPrecompileCall{ 303 PrecompileAddress: addr, 304 ActingAsAddress: caller.Address(), 305 Caller: caller.Address(), 306 Value: value, 307 ReadOnly: false, 308 Evm: evm, 309 } 310 ret, gas, err = RunPrecompiledContract(p, input, gas, info) 311 } else { 312 addrCopy := addr 313 // Initialise a new contract and set the code that is to be used by the EVM. 314 // The contract is a scoped environment for this execution context only. 315 contract := NewContract(caller, AccountRef(caller.Address()), value, gas) 316 contract.SetCallCode(&addrCopy, evm.StateDB.GetCodeHash(addrCopy), evm.StateDB.GetCode(addrCopy)) 317 ret, err = evm.interpreter.Run(contract, input, false) 318 gas = contract.Gas 319 } 320 if err != nil { 321 evm.StateDB.RevertToSnapshot(snapshot) 322 if err != ErrExecutionReverted { 323 gas = 0 324 } 325 } 326 return ret, gas, err 327 } 328 329 // DelegateCall executes the contract associated with the addr with the given input 330 // as parameters. It reverses the state in case of an execution error. 331 // 332 // DelegateCall differs from CallCode in the sense that it executes the given address' 333 // code with the caller as context and the caller is set to the caller of the caller. 334 func (evm *EVM) DelegateCall(caller ContractRef, addr common.Address, input []byte, gas uint64) (ret []byte, leftOverGas uint64, err error) { 335 // Fail if we're trying to execute above the call depth limit 336 if evm.depth > int(params.CallCreateDepth) { 337 return nil, gas, ErrDepth 338 } 339 var snapshot = evm.StateDB.Snapshot() 340 341 // Invoke tracer hooks that signal entering/exiting a call frame 342 if evm.Config.Debug { 343 // NOTE: caller must, at all times be a contract. It should never happen 344 // that caller is something other than a Contract. 345 parent := caller.(*Contract) 346 // DELEGATECALL inherits value from parent call 347 evm.Config.Tracer.CaptureEnter(DELEGATECALL, caller.Address(), addr, input, gas, parent.value) 348 defer func(startGas uint64) { 349 evm.Config.Tracer.CaptureExit(ret, startGas-gas, err) 350 }(gas) 351 } 352 353 // It is allowed to call precompiles, even via delegatecall 354 if p, isPrecompile := evm.precompile(addr); isPrecompile { 355 caller := caller.(*Contract) 356 info := &AdvancedPrecompileCall{ 357 PrecompileAddress: addr, 358 ActingAsAddress: caller.Address(), 359 Caller: caller.CallerAddress, 360 Value: caller.Value(), 361 ReadOnly: false, 362 Evm: evm, 363 } 364 ret, gas, err = RunPrecompiledContract(p, input, gas, info) 365 } else { 366 addrCopy := addr 367 // Initialise a new contract and make initialise the delegate values 368 contract := NewContract(caller, AccountRef(caller.Address()), nil, gas).AsDelegate() 369 contract.SetCallCode(&addrCopy, evm.StateDB.GetCodeHash(addrCopy), evm.StateDB.GetCode(addrCopy)) 370 ret, err = evm.interpreter.Run(contract, input, false) 371 gas = contract.Gas 372 } 373 if err != nil { 374 evm.StateDB.RevertToSnapshot(snapshot) 375 if err != ErrExecutionReverted { 376 gas = 0 377 } 378 } 379 return ret, gas, err 380 } 381 382 // StaticCall executes the contract associated with the addr with the given input 383 // as parameters while disallowing any modifications to the state during the call. 384 // Opcodes that attempt to perform such modifications will result in exceptions 385 // instead of performing the modifications. 386 func (evm *EVM) StaticCall(caller ContractRef, addr common.Address, input []byte, gas uint64) (ret []byte, leftOverGas uint64, err error) { 387 // Fail if we're trying to execute above the call depth limit 388 if evm.depth > int(params.CallCreateDepth) { 389 return nil, gas, ErrDepth 390 } 391 // We take a snapshot here. This is a bit counter-intuitive, and could probably be skipped. 392 // However, even a staticcall is considered a 'touch'. On mainnet, static calls were introduced 393 // after all empty accounts were deleted, so this is not required. However, if we omit this, 394 // then certain tests start failing; stRevertTest/RevertPrecompiledTouchExactOOG.json. 395 // We could change this, but for now it's left for legacy reasons 396 var snapshot = evm.StateDB.Snapshot() 397 398 // We do an AddBalance of zero here, just in order to trigger a touch. 399 // This doesn't matter on Mainnet, where all empties are gone at the time of Byzantium, 400 // but is the correct thing to do and matters on other networks, in tests, and potential 401 // future scenarios 402 evm.StateDB.AddBalance(addr, big0) 403 404 // Invoke tracer hooks that signal entering/exiting a call frame 405 if evm.Config.Debug { 406 evm.Config.Tracer.CaptureEnter(STATICCALL, caller.Address(), addr, input, gas, nil) 407 defer func(startGas uint64) { 408 evm.Config.Tracer.CaptureExit(ret, startGas-gas, err) 409 }(gas) 410 } 411 412 if p, isPrecompile := evm.precompile(addr); isPrecompile { 413 info := &AdvancedPrecompileCall{ 414 PrecompileAddress: addr, 415 ActingAsAddress: addr, 416 Caller: caller.Address(), 417 Value: new(big.Int), 418 ReadOnly: true, 419 Evm: evm, 420 } 421 ret, gas, err = RunPrecompiledContract(p, input, gas, info) 422 } else { 423 // At this point, we use a copy of address. If we don't, the go compiler will 424 // leak the 'contract' to the outer scope, and make allocation for 'contract' 425 // even if the actual execution ends on RunPrecompiled above. 426 addrCopy := addr 427 // Initialise a new contract and set the code that is to be used by the EVM. 428 // The contract is a scoped environment for this execution context only. 429 contract := NewContract(caller, AccountRef(addrCopy), new(big.Int), gas) 430 contract.SetCallCode(&addrCopy, evm.StateDB.GetCodeHash(addrCopy), evm.StateDB.GetCode(addrCopy)) 431 // When an error was returned by the EVM or when setting the creation code 432 // above we revert to the snapshot and consume any gas remaining. Additionally 433 // when we're in Homestead this also counts for code storage gas errors. 434 ret, err = evm.interpreter.Run(contract, input, true) 435 gas = contract.Gas 436 } 437 if err != nil { 438 evm.StateDB.RevertToSnapshot(snapshot) 439 if err != ErrExecutionReverted { 440 gas = 0 441 } 442 } 443 return ret, gas, err 444 } 445 446 type codeAndHash struct { 447 code []byte 448 hash common.Hash 449 } 450 451 func (c *codeAndHash) Hash() common.Hash { 452 if c.hash == (common.Hash{}) { 453 c.hash = crypto.Keccak256Hash(c.code) 454 } 455 return c.hash 456 } 457 458 // create creates a new contract using code as deployment code. 459 func (evm *EVM) create(caller ContractRef, codeAndHash *codeAndHash, gas uint64, value *big.Int, address common.Address, typ OpCode) ([]byte, common.Address, uint64, error) { 460 // Depth check execution. Fail if we're trying to execute above the 461 // limit. 462 if evm.depth > int(params.CallCreateDepth) { 463 return nil, common.Address{}, gas, ErrDepth 464 } 465 if !evm.Context.CanTransfer(evm.StateDB, caller.Address(), value) { 466 return nil, common.Address{}, gas, ErrInsufficientBalance 467 } 468 nonce := evm.StateDB.GetNonce(caller.Address()) 469 if nonce+1 < nonce { 470 return nil, common.Address{}, gas, ErrNonceUintOverflow 471 } 472 evm.StateDB.SetNonce(caller.Address(), nonce+1) 473 // We add this to the access list _before_ taking a snapshot. Even if the creation fails, 474 // the access-list change should not be rolled back 475 if evm.chainRules.IsBerlin { 476 evm.StateDB.AddAddressToAccessList(address) 477 } 478 // Ensure there's no existing contract already at the designated address 479 contractHash := evm.StateDB.GetCodeHash(address) 480 if evm.StateDB.GetNonce(address) != 0 || (contractHash != (common.Hash{}) && contractHash != emptyCodeHash) { 481 return nil, common.Address{}, 0, ErrContractAddressCollision 482 } 483 // Create a new account on the state 484 snapshot := evm.StateDB.Snapshot() 485 evm.StateDB.CreateAccount(address) 486 if evm.chainRules.IsEIP158 { 487 evm.StateDB.SetNonce(address, 1) 488 } 489 evm.Context.Transfer(evm.StateDB, caller.Address(), address, value) 490 491 // Initialise a new contract and set the code that is to be used by the EVM. 492 // The contract is a scoped environment for this execution context only. 493 contract := NewContract(caller, AccountRef(address), value, gas) 494 contract.SetCodeOptionalHash(&address, codeAndHash) 495 496 if evm.Config.Debug { 497 if evm.depth == 0 { 498 evm.Config.Tracer.CaptureStart(evm, caller.Address(), address, true, codeAndHash.code, gas, value) 499 } else { 500 evm.Config.Tracer.CaptureEnter(typ, caller.Address(), address, codeAndHash.code, gas, value) 501 } 502 } 503 504 ret, err := evm.interpreter.Run(contract, nil, false) 505 506 // Check whether the max code size has been exceeded, assign err if the case. 507 if err == nil && evm.chainRules.IsEIP158 && len(ret) > params.MaxCodeSize { 508 err = ErrMaxCodeSizeExceeded 509 } 510 511 // Reject code starting with 0xEF if EIP-3541 is enabled. 512 if err == nil && len(ret) >= 1 && ret[0] == 0xEF && evm.chainRules.IsLondon { 513 err = ErrInvalidCode 514 } 515 516 // if the contract creation ran successfully and no errors were returned 517 // calculate the gas required to store the code. If the code could not 518 // be stored due to not enough gas set an error and let it be handled 519 // by the error checking condition below. 520 if err == nil { 521 createDataGas := uint64(len(ret)) * params.CreateDataGas 522 if contract.UseGas(createDataGas) { 523 evm.StateDB.SetCode(address, ret) 524 } else { 525 err = ErrCodeStoreOutOfGas 526 } 527 } 528 529 // When an error was returned by the EVM or when setting the creation code 530 // above we revert to the snapshot and consume any gas remaining. Additionally 531 // when we're in homestead this also counts for code storage gas errors. 532 if err != nil && (evm.chainRules.IsHomestead || err != ErrCodeStoreOutOfGas) { 533 evm.StateDB.RevertToSnapshot(snapshot) 534 if err != ErrExecutionReverted { 535 contract.UseGas(contract.Gas) 536 } 537 } 538 539 if evm.Config.Debug { 540 if evm.depth == 0 { 541 evm.Config.Tracer.CaptureEnd(ret, gas-contract.Gas, err) 542 } else { 543 evm.Config.Tracer.CaptureExit(ret, gas-contract.Gas, err) 544 } 545 } 546 return ret, address, contract.Gas, err 547 } 548 549 // Create creates a new contract using code as deployment code. 550 func (evm *EVM) Create(caller ContractRef, code []byte, gas uint64, value *big.Int) (ret []byte, contractAddr common.Address, leftOverGas uint64, err error) { 551 contractAddr = crypto.CreateAddress(caller.Address(), evm.StateDB.GetNonce(caller.Address())) 552 return evm.create(caller, &codeAndHash{code: code}, gas, value, contractAddr, CREATE) 553 } 554 555 // Create2 creates a new contract using code as deployment code. 556 // 557 // The different between Create2 with Create is Create2 uses keccak256(0xff ++ msg.sender ++ salt ++ keccak256(init_code))[12:] 558 // instead of the usual sender-and-nonce-hash as the address where the contract is initialized at. 559 func (evm *EVM) Create2(caller ContractRef, code []byte, gas uint64, endowment *big.Int, salt *uint256.Int) (ret []byte, contractAddr common.Address, leftOverGas uint64, err error) { 560 codeAndHash := &codeAndHash{code: code} 561 contractAddr = crypto.CreateAddress2(caller.Address(), salt.Bytes32(), codeAndHash.Hash().Bytes()) 562 return evm.create(caller, codeAndHash, gas, endowment, contractAddr, CREATE2) 563 } 564 565 // ChainConfig returns the environment's chain configuration 566 func (evm *EVM) ChainConfig() *params.ChainConfig { return evm.chainConfig }