plugeth/vm/address.go

43 lines
882 B
Go
Raw Normal View History

2014-10-18 11:31:20 +00:00
package vm
2014-10-08 10:01:36 +00:00
import (
"math/big"
"github.com/ethereum/go-ethereum/ethcrypto"
"github.com/ethereum/go-ethereum/ethutil"
2014-10-08 10:01:36 +00:00
)
type Address interface {
Call(in []byte) []byte
}
type PrecompiledAddress struct {
Gas *big.Int
fn func(in []byte) []byte
}
func (self PrecompiledAddress) Call(in []byte) []byte {
return self.fn(in)
}
var Precompiled = map[uint64]*PrecompiledAddress{
1: &PrecompiledAddress{big.NewInt(500), ecrecoverFunc},
2: &PrecompiledAddress{big.NewInt(100), sha256Func},
3: &PrecompiledAddress{big.NewInt(100), ripemd160Func},
}
func sha256Func(in []byte) []byte {
return ethcrypto.Sha256(in)
}
func ripemd160Func(in []byte) []byte {
return ethutil.RightPadBytes(ethcrypto.Ripemd160(in), 32)
}
func ecrecoverFunc(in []byte) []byte {
// In case of an invalid sig. Defaults to return nil
defer func() { recover() }()
return ethcrypto.Ecrecover(in)
}