def test_signing(self):
message = Message(urandom(32))
private, public = generate_keypair()
sig = message.sign(private)
fake_sig = Signature(sig.r + 1, sig.s - 1)
_, fake_public = generate_keypair()
fake_message = Message.from_int(message.int() + 1)
self.assertTrue(message.verify(sig, public))
self.assertFalse(message.verify(sig, fake_public))
self.assertFalse(message.verify(fake_sig, public))
self.assertFalse(fake_message.verify(sig, public))
def test_bech32_decode(self):
private, public = generate_keypair()
witprog = hash160(public.encode(compressed=True))
address = bech32.encode(self.hrp, self.witver, witprog)
wv, decoded = bech32.decode(self.hrp, address)
self.assertEqual(wv, self.witver)
self.assertEqual(bytes(decoded), bytes(witprog))
def test_compression(self):
prv, pub = generate_keypair()
encoded = pub.encode(compressed=True)
self.assertEqual(PublicKey.decode(encoded), pub)
encoded = pub.encode(compressed=False)
self.assertEqual(PublicKey.decode(encoded), pub)
def vanity(prefix: str) -> Tuple[str, str, str]:
"""Generate a vanity address starting with the input (excluding the version byte)"""
not_in_alphabet = {i for i in prefix if i not in base58.ALPHABET}
assert not not_in_alphabet, f"Characters {not_in_alphabet} are not in alphabet"
start = time()
counter = 0
while True:
counter += 1
private, public = generate_keypair()
address = pubkey_to_address(public)
if address[1:].startswith(prefix):
duration = timedelta(seconds=round(time() - start))
print(
f"Found address starting with {prefix} in {duration} after {counter:,} tries"
)
return private.hex(), public.hex(), address