/*
Package crypto provides an interface to VM cryptographic instructions.
*/
package crypto

// SHA1 computes SHA1 hash of b. It uses `SHA1` VM instruction.
func SHA1(b []byte) []byte {
	return nil
}

// SHA256 computes SHA256 hash of b. It uses `SHA256` VM instruction.
func SHA256(b []byte) []byte {
	return nil
}

// Hash160 computes SHA256 + RIPEMD-160 of b, which is commonly used for
// script hashing and address generation. It uses `HASH160` VM instruction.
func Hash160(b []byte) []byte {
	return nil
}

// Hash256 computes double SHA256 hash of b (SHA256(SHA256(b))) which is used
// as ID for transactions, blocks and assets. It uses `HASH256` VM instruction.
func Hash256(b []byte) []byte {
	return nil
}

// VerifySignature checks that sig is correct msg's signature for a given pub
// (serialized public key). It uses `VERIFY` VM instruction.
func VerifySignature(msg []byte, sig []byte, pub []byte) bool {
	return false
}