def sign_bytes(private_key: Ed25519PrivateKey, digest: bytes) -> bytes:
""" Signs bytest with passed Ed25519PrivateKey.
Args:
private_key (Ed25519PrivateKey): Signing Key.
digest (bytes): Bytes to sign.
Returns:
bytes: Signature.
"""
return private_key.sign(digest)
def sign_synapse(private_key: Ed25519PrivateKey,
synapse: bittensor_pb2.Synapse) -> bittensor_pb2.Synapse:
""" Signs the passed bittensor_pb2.Synapse contents and appends the signature.
Args:
private_key (Ed25519PrivateKey): Private key to use for signature.
synapse (bittensor_pb2.Synapse): Synapse to sign.
Returns:
bittensor_pb2.Synapse: Synapse with signature.
"""
digest = Crypto.digest(synapse)
signature = private_key.sign(digest) # to create.
synapse.signature = signature
return synapse
