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core, crypto, params: implement CREATE2 evm instrction (#17196)

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* core, crypto, params: implement CREATE2 evm instrction

* core/vm: add opcode to string mapping

* core: remove past fork checking

* core, crypto: use option2 to generate new address
This commit is contained in:
gary rong
2018-07-24 22:22:03 +08:00
committed by Péter Szilágyi
parent 2909f6d7a2
commit cab1cff11c
8 changed files with 94 additions and 17 deletions
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48
core/vm/evm.go
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@@ -319,9 +319,8 @@ func (evm *EVM) StaticCall(caller ContractRef, addr common.Address, input []byte
return ret, contract.Gas, err
}
// Create creates a new contract using code as deployment code.
func (evm *EVM) Create(caller ContractRef, code []byte, gas uint64, value *big.Int) (ret []byte, contractAddr common.Address, leftOverGas uint64, err error) {
// create creates a new contract using code as deployment code.
func (evm *EVM) create(caller ContractRef, code []byte, gas uint64, value *big.Int, address common.Address) ([]byte, common.Address, uint64, error) {
// Depth check execution. Fail if we're trying to execute above the
// limit.
if evm.depth > int(params.CallCreateDepth) {
@@ -330,39 +329,38 @@ func (evm *EVM) Create(caller ContractRef, code []byte, gas uint64, value *big.I
if !evm.CanTransfer(evm.StateDB, caller.Address(), value) {
return nil, common.Address{}, gas, ErrInsufficientBalance
}
// Ensure there's no existing contract already at the designated address
nonce := evm.StateDB.GetNonce(caller.Address())
evm.StateDB.SetNonce(caller.Address(), nonce+1)
contractAddr = crypto.CreateAddress(caller.Address(), nonce)
contractHash := evm.StateDB.GetCodeHash(contractAddr)
if evm.StateDB.GetNonce(contractAddr) != 0 || (contractHash != (common.Hash{}) && contractHash != emptyCodeHash) {
// Ensure there's no existing contract already at the designated address
contractHash := evm.StateDB.GetCodeHash(address)
if evm.StateDB.GetNonce(address) != 0 || (contractHash != (common.Hash{}) && contractHash != emptyCodeHash) {
return nil, common.Address{}, 0, ErrContractAddressCollision
}
// Create a new account on the state
snapshot := evm.StateDB.Snapshot()
evm.StateDB.CreateAccount(contractAddr)
evm.StateDB.CreateAccount(address)
if evm.ChainConfig().IsEIP158(evm.BlockNumber) {
evm.StateDB.SetNonce(contractAddr, 1)
evm.StateDB.SetNonce(address, 1)
}
evm.Transfer(evm.StateDB, caller.Address(), contractAddr, value)
evm.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(contractAddr), value, gas)
contract.SetCallCode(&contractAddr, crypto.Keccak256Hash(code), code)
contract := NewContract(caller, AccountRef(address), value, gas)
contract.SetCallCode(&address, crypto.Keccak256Hash(code), code)
if evm.vmConfig.NoRecursion && evm.depth > 0 {
return nil, contractAddr, gas, nil
return nil, address, gas, nil
}
if evm.vmConfig.Debug && evm.depth == 0 {
evm.vmConfig.Tracer.CaptureStart(caller.Address(), contractAddr, true, code, gas, value)
evm.vmConfig.Tracer.CaptureStart(caller.Address(), address, true, code, gas, value)
}
start := time.Now()
ret, err = run(evm, contract, nil)
ret, err := run(evm, contract, nil)
// check whether the max code size has been exceeded
maxCodeSizeExceeded := evm.ChainConfig().IsEIP158(evm.BlockNumber) && len(ret) > params.MaxCodeSize
@@ -373,7 +371,7 @@ func (evm *EVM) Create(caller ContractRef, code []byte, gas uint64, value *big.I
if err == nil && !maxCodeSizeExceeded {
createDataGas := uint64(len(ret)) * params.CreateDataGas
if contract.UseGas(createDataGas) {
evm.StateDB.SetCode(contractAddr, ret)
evm.StateDB.SetCode(address, ret)
} else {
err = ErrCodeStoreOutOfGas
}
@@ -395,7 +393,23 @@ func (evm *EVM) Create(caller ContractRef, code []byte, gas uint64, value *big.I
if evm.vmConfig.Debug && evm.depth == 0 {
evm.vmConfig.Tracer.CaptureEnd(ret, gas-contract.Gas, time.Since(start), err)
}
return ret, contractAddr, contract.Gas, err
return ret, address, contract.Gas, err
}
// Create creates a new contract using code as deployment code.
func (evm *EVM) Create(caller ContractRef, code []byte, gas uint64, value *big.Int) (ret []byte, contractAddr common.Address, leftOverGas uint64, err error) {
contractAddr = crypto.CreateAddress(caller.Address(), evm.StateDB.GetNonce(caller.Address()))
return evm.create(caller, code, gas, value, contractAddr)
}
// Create2 creates a new contract using code as deployment code.
//
// The different between Create2 with Create is Create2 uses sha3(msg.sender ++ salt ++ 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 *big.Int, salt *big.Int) (ret []byte, contractAddr common.Address, leftOverGas uint64, err error) {
contractAddr = crypto.CreateAddress2(caller.Address(), common.BigToHash(salt), code)
return evm.create(caller, code, gas, endowment, contractAddr)
}
// ChainConfig returns the environment's chain configuration