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