Package sha3 implements the SHA3 hash algorithm (formerly called Keccak) chosen by NIST in 2012.

GetRandomBytes returns len random looking bytes.

GetRandomNonce returns a random byte array of length NonceSize.

S256 returns an instance of the secp256k1 curve.

Sign calculates an ECDSA signature.

NonceSize is the default NonceSize.

LocalSigner is a temporary stub interface which will be implemented by the local MSP.