Return credential definition identifier for input issuer DID and schema sequence number.

    :param issuer_did: DID of credential definition issuer
    :param schema_seq_no: schema sequence number
    :return: credential definition identifier

def cred_def_id(issuer_did: str, schema_seq_no: int) -> str:
    """
    Return credential definition identifier for input issuer DID and schema sequence number.

    :param issuer_did: DID of credential definition issuer
    :param schema_seq_no: schema sequence number
    :return: credential definition identifier
    """

    return '{}:3:CL:{}:{}'.format(issuer_did, schema_seq_no, CD_ID_TAG)