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helper_test.py
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from binascii import unhexlify
from io import BytesIO
from unittest import TestCase
from helper import (
decode_base58,
encode_base58_checksum,
encode_varint,
flip_endian,
little_endian_to_int,
int_to_little_endian,
h160_to_p2pkh_address,
h160_to_p2sh_address,
merkle_parent,
merkle_parent_level,
merkle_root,
merkle_path,
p2pkh_script,
p2sh_script,
read_varint,
)
class HelperTest(TestCase):
def test_base58(self):
addr = '1BenRpVUFK65JFWcQSuHnJKzc4M8ZP8Eqa'
h160 = unhexlify('0074d691da1574e6b3c192ecfb52cc8984ee7b6c56')
self.assertEqual(decode_base58(addr), h160)
self.assertRaises(ValueError, decode_base58, addr+'1')
got = encode_base58_checksum(h160)
self.assertEqual(got, addr)
wif = '5HpHagT65TZzG1PH3CSu63k8DbpvD8s5ip4nEB3kEsreAnchuDf'
want = unhexlify('800000000000000000000000000000000000000000000000000000000000000001')
self.assertEqual(decode_base58(wif, num_bytes=38, strip_leading_zeros=True), want)
def test_p2pkh_script(self):
h160 = unhexlify('74d691da1574e6b3c192ecfb52cc8984ee7b6c56')
self.assertEqual(p2pkh_script(h160)[3:-2], h160)
def test_p2sh_script(self):
h160 = unhexlify('74d691da1574e6b3c192ecfb52cc8984ee7b6c56')
self.assertEqual(p2sh_script(h160)[2:-1], h160)
def test_varint(self):
tests = [
(0x01, unhexlify('01')),
(0xfd, unhexlify('fdfd00')),
(0xfe, unhexlify('fdfe00')),
(0xff, unhexlify('fdff00')),
(0x1234, unhexlify('fd3412')),
(0x123456, unhexlify('fe56341200')),
(0x123456789a01, unhexlify('ff019a785634120000')),
]
for num, encoded in tests:
self.assertEqual(encode_varint(num), encoded)
s = BytesIO(encoded)
self.assertEqual(read_varint(s), num)
self.assertRaises(ValueError, encode_varint, 2**65)
def test_flip_endian(self):
h = '03ee4f7a4e68f802303bc659f8f817964b4b74fe046facc3ae1be4679d622c45'
w = '452c629d67e41baec3ac6f04fe744b4b9617f8f859c63b3002f8684e7a4fee03'
self.assertEqual(flip_endian(h), w)
h = '813f79011acb80925dfe69b3def355fe914bd1d96a3f5f71bf8303c6a989c7d1'
w = 'd1c789a9c60383bf715f3f6ad9d14b91fe55f3deb369fe5d9280cb1a01793f81'
self.assertEqual(flip_endian(h), w)
def test_little_endian_to_int(self):
h = unhexlify('99c3980000000000')
want = 10011545
self.assertEqual(little_endian_to_int(h), want)
h = unhexlify('a135ef0100000000')
want = 32454049
self.assertEqual(little_endian_to_int(h), want)
def test_int_to_little_endian(self):
n = 1
want = b'\x01\x00\x00\x00'
self.assertEqual(int_to_little_endian(n, 4), want)
n = 10011545
want = b'\x99\xc3\x98\x00\x00\x00\x00\x00'
self.assertEqual(int_to_little_endian(n, 8), want)
def test_p2pkh_address(self):
h160 = unhexlify('74d691da1574e6b3c192ecfb52cc8984ee7b6c56')
want = '1BenRpVUFK65JFWcQSuHnJKzc4M8ZP8Eqa'
self.assertEqual(h160_to_p2pkh_address(h160), want)
want = 'mrAjisaT4LXL5MzE81sfcDYKU3wqWSvf9q'
self.assertEqual(h160_to_p2pkh_address(h160, prefix=b'\x6f'), want)
def test_p2sh_address(self):
h160 = unhexlify('74d691da1574e6b3c192ecfb52cc8984ee7b6c56')
want = '3CLoMMyuoDQTPRD3XYZtCvgvkadrAdvdXh'
self.assertEqual(h160_to_p2sh_address(h160, prefix=b'\x05'), want)
want = '2N3u1R6uwQfuobCqbCgBkpsgBxvr1tZpe7B'
self.assertEqual(h160_to_p2sh_address(h160, prefix=b'\xc4'), want)
def test_merkle_parent(self):
tx_hash0 = unhexlify('c117ea8ec828342f4dfb0ad6bd140e03a50720ece40169ee38bdc15d9eb64cf5')
tx_hash1 = unhexlify('c131474164b412e3406696da1ee20ab0fc9bf41c8f05fa8ceea7a08d672d7cc5')
want = unhexlify('8b30c5ba100f6f2e5ad1e2a742e5020491240f8eb514fe97c713c31718ad7ecd')
self.assertEqual(merkle_parent(tx_hash0, tx_hash1), want)
def test_merkle_parent_level0(self):
hex_hashes = [
'c117ea8ec828342f4dfb0ad6bd140e03a50720ece40169ee38bdc15d9eb64cf5',
'c131474164b412e3406696da1ee20ab0fc9bf41c8f05fa8ceea7a08d672d7cc5',
'f391da6ecfeed1814efae39e7fcb3838ae0b02c02ae7d0a5848a66947c0727b0',
'3d238a92a94532b946c90e19c49351c763696cff3db400485b813aecb8a13181',
'10092f2633be5f3ce349bf9ddbde36caa3dd10dfa0ec8106bce23acbff637dae',
'7d37b3d54fa6a64869084bfd2e831309118b9e833610e6228adacdbd1b4ba161',
'8118a77e542892fe15ae3fc771a4abfd2f5d5d5997544c3487ac36b5c85170fc',
'dff6879848c2c9b62fe652720b8df5272093acfaa45a43cdb3696fe2466a3877',
'b825c0745f46ac58f7d3759e6dc535a1fec7820377f24d4c2c6ad2cc55c0cb59',
'95513952a04bd8992721e9b7e2937f1c04ba31e0469fbe615a78197f68f52b7c',
'2e6d722e5e4dbdf2447ddecc9f7dabb8e299bae921c99ad5b0184cd9eb8e5908',
'b13a750047bc0bdceb2473e5fe488c2596d7a7124b4e716fdd29b046ef99bbf0',
]
tx_hashes = [unhexlify(x) for x in hex_hashes]
want_hex_hashes = [
'8b30c5ba100f6f2e5ad1e2a742e5020491240f8eb514fe97c713c31718ad7ecd',
'7f4e6f9e224e20fda0ae4c44114237f97cd35aca38d83081c9bfd41feb907800',
'ade48f2bbb57318cc79f3a8678febaa827599c509dce5940602e54c7733332e7',
'68b3e2ab8182dfd646f13fdf01c335cf32476482d963f5cd94e934e6b3401069',
'43e7274e77fbe8e5a42a8fb58f7decdb04d521f319f332d88e6b06f8e6c09e27',
'4f492e893bf854111c36cb5eff4dccbdd51b576e1cfdc1b84b456cd1c0403ccb',
]
want_tx_hashes = [unhexlify(x) for x in want_hex_hashes]
self.assertEqual(merkle_parent_level(tx_hashes), want_tx_hashes)
def test_merkle_parent_level1(self):
hex_hashes = [
'c117ea8ec828342f4dfb0ad6bd140e03a50720ece40169ee38bdc15d9eb64cf5',
'c131474164b412e3406696da1ee20ab0fc9bf41c8f05fa8ceea7a08d672d7cc5',
'f391da6ecfeed1814efae39e7fcb3838ae0b02c02ae7d0a5848a66947c0727b0',
'3d238a92a94532b946c90e19c49351c763696cff3db400485b813aecb8a13181',
'10092f2633be5f3ce349bf9ddbde36caa3dd10dfa0ec8106bce23acbff637dae',
'7d37b3d54fa6a64869084bfd2e831309118b9e833610e6228adacdbd1b4ba161',
'8118a77e542892fe15ae3fc771a4abfd2f5d5d5997544c3487ac36b5c85170fc',
'dff6879848c2c9b62fe652720b8df5272093acfaa45a43cdb3696fe2466a3877',
'b825c0745f46ac58f7d3759e6dc535a1fec7820377f24d4c2c6ad2cc55c0cb59',
'95513952a04bd8992721e9b7e2937f1c04ba31e0469fbe615a78197f68f52b7c',
'2e6d722e5e4dbdf2447ddecc9f7dabb8e299bae921c99ad5b0184cd9eb8e5908',
]
tx_hashes = [unhexlify(x) for x in hex_hashes]
want_hex_hashes = [
'8b30c5ba100f6f2e5ad1e2a742e5020491240f8eb514fe97c713c31718ad7ecd',
'7f4e6f9e224e20fda0ae4c44114237f97cd35aca38d83081c9bfd41feb907800',
'ade48f2bbb57318cc79f3a8678febaa827599c509dce5940602e54c7733332e7',
'68b3e2ab8182dfd646f13fdf01c335cf32476482d963f5cd94e934e6b3401069',
'43e7274e77fbe8e5a42a8fb58f7decdb04d521f319f332d88e6b06f8e6c09e27',
'1796cd3ca4fef00236e07b723d3ed88e1ac433acaaa21da64c4b33c946cf3d10',
]
want_tx_hashes = [unhexlify(x) for x in want_hex_hashes]
self.assertEqual(merkle_parent_level(tx_hashes), want_tx_hashes)
def test_merkle_root(self):
hex_hashes = [
'c117ea8ec828342f4dfb0ad6bd140e03a50720ece40169ee38bdc15d9eb64cf5',
'c131474164b412e3406696da1ee20ab0fc9bf41c8f05fa8ceea7a08d672d7cc5',
'f391da6ecfeed1814efae39e7fcb3838ae0b02c02ae7d0a5848a66947c0727b0',
'3d238a92a94532b946c90e19c49351c763696cff3db400485b813aecb8a13181',
'10092f2633be5f3ce349bf9ddbde36caa3dd10dfa0ec8106bce23acbff637dae',
'7d37b3d54fa6a64869084bfd2e831309118b9e833610e6228adacdbd1b4ba161',
'8118a77e542892fe15ae3fc771a4abfd2f5d5d5997544c3487ac36b5c85170fc',
'dff6879848c2c9b62fe652720b8df5272093acfaa45a43cdb3696fe2466a3877',
'b825c0745f46ac58f7d3759e6dc535a1fec7820377f24d4c2c6ad2cc55c0cb59',
'95513952a04bd8992721e9b7e2937f1c04ba31e0469fbe615a78197f68f52b7c',
'2e6d722e5e4dbdf2447ddecc9f7dabb8e299bae921c99ad5b0184cd9eb8e5908',
'b13a750047bc0bdceb2473e5fe488c2596d7a7124b4e716fdd29b046ef99bbf0',
]
tx_hashes = [unhexlify(x) for x in hex_hashes]
want_hex_hash = 'acbcab8bcc1af95d8d563b77d24c3d19b18f1486383d75a5085c4e86c86beed6'
want_hash = unhexlify(want_hex_hash)
self.assertEqual(merkle_root(tx_hashes), want_hash)
def test_merkle_path(self):
i = 7
total = 11
want = [7, 3, 1, 0]
self.assertEqual(merkle_path(i, total), want)