def get_keys(client):
    """Generate 3 pairs of keys using various schemes and return the list
    of aliases."""
    keys = ['foo', 'bar', 'boo']
    sigs = [None, 'secp256k1', 'ed25519']
    for key, sig in zip(keys, sigs):
        args = [] if sig is None else ['--sig', sig]
        client.gen_key(key, args)
    return keys