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#!/usr/bin/python3
# Copyright (c) 2017 Pieter Wuille
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
"""Reference tests for segwit adresses"""
import binascii
import unittest
import segwit_addr
def segwit_scriptpubkey(witver, witprog):
"""Construct a Segwit scriptPubKey for a given witness program."""
return bytes([witver + 0x50 if witver else 0, len(witprog)] + witprog)
VALID_CHECKSUM = [
"A12UEL5L",
"an83characterlonghumanreadablepartthatcontainsthenumber1andtheexcludedcharactersbio1tt5tgs",
"abcdef1qpzry9x8gf2tvdw0s3jn54khce6mua7lmqqqxw",
"11qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqc8247j",
"split1checkupstagehandshakeupstreamerranterredcaperred2y9e3w",
]
INVALID_CHECKSUM = [
" 1nwldj5",
"\x7F" + "1axkwrx",
"an84characterslonghumanreadablepartthatcontainsthenumber1andtheexcludedcharactersbio1569pvx",
"pzry9x0s0muk",
"1pzry9x0s0muk",
"x1b4n0q5v",
"li1dgmt3",
"de1lg7wt\xff",
]
VALID_ADDRESS = [
["BC1QW508D6QEJXTDG4Y5R3ZARVARY0C5XW7KV8F3T4", "0014751e76e8199196d454941c45d1b3a323f1433bd6"],
["tb1qrp33g0q5c5txsp9arysrx4k6zdkfs4nce4xj0gdcccefvpysxf3q0sl5k7",
"00201863143c14c5166804bd19203356da136c985678cd4d27a1b8c6329604903262"],
["bc1pw508d6qejxtdg4y5r3zarvary0c5xw7kw508d6qejxtdg4y5r3zarvary0c5xw7k7grplx",
"5128751e76e8199196d454941c45d1b3a323f1433bd6751e76e8199196d454941c45d1b3a323f1433bd6"],
["BC1SW50QA3JX3S", "6002751e"],
["bc1zw508d6qejxtdg4y5r3zarvaryvg6kdaj", "5210751e76e8199196d454941c45d1b3a323"],
["tb1qqqqqp399et2xygdj5xreqhjjvcmzhxw4aywxecjdzew6hylgvsesrxh6hy",
"0020000000c4a5cad46221b2a187905e5266362b99d5e91c6ce24d165dab93e86433"],
]
INVALID_ADDRESS = [
"tc1qw508d6qejxtdg4y5r3zarvary0c5xw7kg3g4ty",
"bc1qw508d6qejxtdg4y5r3zarvary0c5xw7kv8f3t5",
"BC13W508D6QEJXTDG4Y5R3ZARVARY0C5XW7KN40WF2",
"bc1rw5uspcuh",
"bc10w508d6qejxtdg4y5r3zarvary0c5xw7kw508d6qejxtdg4y5r3zarvary0c5xw7kw5rljs90",
"BC1QR508D6QEJXTDG4Y5R3ZARVARYV98GJ9P",
"tb1qrp33g0q5c5txsp9arysrx4k6zdkfs4nce4xj0gdcccefvpysxf3q0sL5k7",
"bc1zw508d6qejxtdg4y5r3zarvaryvqyzf3du",
"tb1qrp33g0q5c5txsp9arysrx4k6zdkfs4nce4xj0gdcccefvpysxf3pjxtptv",
"bc1gmk9yu",
]
INVALID_ADDRESS_ENC = [
("BC", 0, 20),
("bc", 0, 21),
("bc", 17, 32),
("bc", 1, 1),
("bc", 16, 41),
]
class TestSegwitAddress(unittest.TestCase):
"""Unit test class for segwit addressess."""
def test_valid_checksum(self):
"""Test checksum creation and validation."""
for test in VALID_CHECKSUM:
hrp, _ = segwit_addr.bech32_decode(test)
self.assertIsNotNone(hrp)
pos = test.rfind('1')
test = test[:pos+1] + chr(ord(test[pos + 1]) ^ 1) + test[pos+2:]
hrp, _ = segwit_addr.bech32_decode(test)
self.assertIsNone(hrp)
def test_invalid_checksum(self):
"""Test validation of invalid checksums."""
for test in INVALID_CHECKSUM:
hrp, _ = segwit_addr.bech32_decode(test)
self.assertIsNone(hrp)
def test_valid_address(self):
"""Test whether valid addresses decode to the correct output."""
for (address, hexscript) in VALID_ADDRESS:
hrp = "bc"
witver, witprog = segwit_addr.decode(hrp, address)
if witver is None:
hrp = "tb"
witver, witprog = segwit_addr.decode(hrp, address)
self.assertIsNotNone(witver)
scriptpubkey = segwit_scriptpubkey(witver, witprog)
self.assertEqual(scriptpubkey, binascii.unhexlify(hexscript))
addr = segwit_addr.encode(hrp, witver, witprog)
self.assertEqual(address.lower(), addr)
def test_invalid_address(self):
"""Test whether invalid addresses fail to decode."""
for test in INVALID_ADDRESS:
witver, _ = segwit_addr.decode("bc", test)
self.assertIsNone(witver)
witver, _ = segwit_addr.decode("tb", test)
self.assertIsNone(witver)
def test_invalid_address_enc(self):
"""Test whether address encoding fails on invalid input."""
for hrp, version, length in INVALID_ADDRESS_ENC:
code = segwit_addr.encode(hrp, version, [0] * length)
self.assertIsNone(code)
if __name__ == "__main__":
unittest.main()
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