gaspersic/go-ethereum
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Precompiled contract & Depth change

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* Added pre-compiled contract 0x04 (mem cpy)
* Changed depth error to return the gas instead of consuming
This commit is contained in:
obscuren
2015-01-05 17:37:30 +01:00
parent d001479a47
commit b99b2c446c
3 changed files with 19 additions and 1 deletions
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16
vm/address.go
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@ -21,19 +21,31 @@ func (self PrecompiledAccount) Call(in []byte) []byte {
}
var Precompiled = map[string]*PrecompiledAccount{
// ECRECOVER
string(ethutil.LeftPadBytes([]byte{1}, 20)): &PrecompiledAccount{func(l int) *big.Int {
return GasEcrecover
}, ecrecoverFunc},
// SHA256
string(ethutil.LeftPadBytes([]byte{2}, 20)): &PrecompiledAccount{func(l int) *big.Int {
n := big.NewInt(int64(l+31)/32 + 1)
n.Mul(n, GasSha256)
return n
}, sha256Func},
// RIPEMD160
string(ethutil.LeftPadBytes([]byte{3}, 20)): &PrecompiledAccount{func(l int) *big.Int {
n := big.NewInt(int64(l+31)/32 + 1)
n.Mul(n, GasRipemd)
return n
}, ripemd160Func},
string(ethutil.LeftPadBytes([]byte{4}, 20)): &PrecompiledAccount{func(l int) *big.Int {
n := big.NewInt(int64(l+31)/32 + 1)
n.Mul(n, GasMemCpy)
return n
}, memCpy},
}
func sha256Func(in []byte) []byte {
@ -54,3 +66,7 @@ func ecrecoverFunc(in []byte) []byte {
return ethutil.LeftPadBytes(crypto.Sha3(crypto.Ecrecover(append(hash, sig...))[1:])[12:], 32)
}
func memCpy(in []byte) []byte {
return in
}