diff options
Diffstat (limited to 'vm')
| -rw-r--r-- | vm/address.go | 16 | ||||
| -rw-r--r-- | vm/common.go | 1 |
2 files changed, 17 insertions, 0 deletions
diff --git a/vm/address.go b/vm/address.go index 611979c94..be4284421 100644 --- a/vm/address.go +++ b/vm/address.go @@ -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 +} diff --git a/vm/common.go b/vm/common.go index 529bbdeb1..acf18eede 100644 --- a/vm/common.go +++ b/vm/common.go @@ -38,6 +38,7 @@ var ( GasSha256 = big.NewInt(50) GasRipemd = big.NewInt(50) GasEcrecover = big.NewInt(500) + GasMemCpy = big.NewInt(1) Pow256 = ethutil.BigPow(2, 256) |