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core/vm: do less hashing in CREATE2

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This commit is contained in:
Martin Holst Swende 2018-10-01 13:12:43 +02:00
parent c4e3625209
commit efc32877de
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GPG key ID: 683B438C05A5DDF0
2 changed files with 24 additions and 9 deletions
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27
core/vm/evm.go
View file

@ -352,8 +352,21 @@ func (evm *EVM) StaticCall(caller ContractRef, addr common.Address, input []byte
return ret, contract.Gas, err
}
type codeAndHash struct {
code []byte
hash *common.Hash
}
func (c *codeAndHash) Hash() common.Hash {
if c.hash == nil {
h := crypto.Keccak256Hash(c.code)
c.hash = &h
}
return *c.hash
}
// 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) {
func (evm *EVM) create(caller ContractRef, codeAndHash codeAndHash, 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) {
@ -382,14 +395,14 @@ func (evm *EVM) create(caller ContractRef, code []byte, gas uint64, value *big.I
// EVM. The contract is a scoped environment for this execution context
// only.
contract := NewContract(caller, AccountRef(address), value, gas)
contract.SetCallCode(&address, crypto.Keccak256Hash(code), code)
contract.SetCallCode(&address, codeAndHash.Hash(), codeAndHash.code)
if evm.vmConfig.NoRecursion && evm.depth > 0 {
return nil, address, gas, nil
}
if evm.vmConfig.Debug && evm.depth == 0 {
evm.vmConfig.Tracer.CaptureStart(caller.Address(), address, true, code, gas, value)
evm.vmConfig.Tracer.CaptureStart(caller.Address(), address, true, codeAndHash.code, gas, value)
}
start := time.Now()
@ -432,8 +445,9 @@ func (evm *EVM) create(caller ContractRef, code []byte, gas uint64, value *big.I
// 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) {
codeAndHash := codeAndHash{code: code}
contractAddr = crypto.CreateAddress(caller.Address(), evm.StateDB.GetNonce(caller.Address()))
return evm.create(caller, code, gas, value, contractAddr)
return evm.create(caller, codeAndHash, gas, value, contractAddr)
}
// Create2 creates a new contract using code as deployment code.
@ -441,8 +455,9 @@ func (evm *EVM) Create(caller ContractRef, code []byte, gas uint64, value *big.I
// The different between Create2 with Create is Create2 uses sha3(0xff ++ msg.sender ++ salt ++ sha3(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)
codeAndHash := codeAndHash{code: code}
contractAddr = crypto.CreateAddress2(caller.Address(), common.BigToHash(salt), codeAndHash.Hash().Bytes())
return evm.create(caller, codeAndHash, gas, endowment, contractAddr)
}
// ChainConfig returns the environment's chain configuration

6
crypto/crypto.go
View file

@ -77,9 +77,9 @@ func CreateAddress(b common.Address, nonce uint64) common.Address {
}
// CreateAddress2 creates an ethereum address given the address bytes, initial
// contract code and a salt.
func CreateAddress2(b common.Address, salt [32]byte, code []byte) common.Address {
return common.BytesToAddress(Keccak256([]byte{0xff}, b.Bytes(), salt[:], Keccak256(code))[12:])
// contract code hash and a salt.
func CreateAddress2(b common.Address, salt [32]byte, inithash []byte) common.Address {
return common.BytesToAddress(Keccak256([]byte{0xff}, b.Bytes(), salt[:], inithash)[12:])
}
// ToECDSA creates a private key with the given D value.