def witness_from_address(b32addr: String) -> Tuple[int, bytes, str]:
"Return the witness from a bech32 native SegWit address."
if isinstance(b32addr, str):
b32addr = b32addr.strip()
# the following check was originally in b32decode
# but it does not pertain there
if len(b32addr) > 90:
raise BTClibValueError(
f"invalid bech32 address length: {len(b32addr)} > 90")
hrp, data = b32decode(b32addr)
# check that it is a known SegWit address type
network = network_from_key_value("hrp", hrp)
if network is None:
raise BTClibValueError(f"invalid hrp: {hrp}")
if len(data) == 0:
raise BTClibValueError(f"empty data in bech32 address: {b32addr!r}")
wit_ver = data[0]
wit_prg = bytes(power_of_2_base_conversion(data[1:], 5, 8, False))
return wit_ver, check_witness(wit_ver, wit_prg), network
def test_bech32_insertion_issue() -> None:
"""Test documented bech32 insertion issue.
https://github.com/sipa/bech32/issues/51
https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2019-November/017443.html
https://gist.github.com/sipa/a9845b37c1b298a7301c33a04090b2eb
https://gist.github.com/sipa/a9845b37c1b298a7301c33a04090b2eb
https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2020-October/018236.html
https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2020-December/018292.html
https://gist.github.com/sipa/14c248c288c3880a3b191f978a34508e
"""
strings = ("ii2134hk2xmat79tp", "eyg5bsz1l2mrq5ypl40hp")
for string in strings:
for i in range(20):
b32decode(string[:-1] + i * "q" + string[-1:])
def test_valid_checksum(self):
"""Test validation of valid checksums."""
for test in VALID_CHECKSUM:
_, _ = b32decode(test)
pos = test.rfind('1')
test = test[:pos + 1] + chr(ord(test[pos + 1]) ^ 1) + test[pos +
2:]
self.assertRaises(ValueError, b32decode, test)
def test_bechs32_checksum() -> None:
"Test bech32 checksum."
for test in VALID_CHECKSUM:
b32decode(test)
b32decode(test.encode("ascii"))
pos = test.rfind("1")
test = test[:pos + 1] + chr(ord(test[pos + 1]) ^ 1) + test[pos + 2:]
with pytest.raises(BTClibValueError):
b32decode(test)
for addr, err_msg in INVALID_CHECKSUM:
with pytest.raises(BTClibValueError, match=err_msg):
b32decode(addr)
def test_bech32() -> None:
"Test bech32 checksum."
valid_checksum = [
"A12UEL5L",
"a12uel5l",
"an83characterlonghumanreadablepartthatcontainsthenumber1andtheexcludedcharactersbio1tt5tgs",
"abcdef1qpzry9x8gf2tvdw0s3jn54khce6mua7lmqqqxw",
"11qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqc8247j",
"split1checkupstagehandshakeupstreamerranterredcaperred2y9e3w",
"?1ezyfcl",
# the next one would have been invalid with the 90 char limit
"an84characterslonghumanreadablepartthatcontainsthenumber1andtheexcludedcharactersbio1569pvx",
]
for test in valid_checksum:
b32decode(test)
b32decode(test.encode("ascii"))
assert b32encode(*b32decode(test)).decode() == test.lower()
pos = test.rfind("1")
test = test[:pos + 1] + chr(ord(test[pos + 1]) ^ 1) + test[pos + 2:]
with pytest.raises(BTClibValueError):
b32decode(test)
invalid_checksum = [
["\x20" + " 1nwldj5", r"HRP character out of range: *"],
["\x7F" + "1axkwrx", r"HRP character out of range: *"],
["\x80" + "1eym55h", r"HRP character out of range: *"],
["pzry9x0s0muk", r"no separator character: *"],
["1pzry9x0s0muk", r"empty HRP: *"],
["x1b4n0q5v", r"invalid data character: *"],
["li1dgmt3", r"too short checksum: *"],
# Invalid character in checksum
["de1lg7wt\xff", r"invalid character in checksum: *"],
# checksum calculated with uppercase form of HRP
["A1G7SGD8", r"invalid checksum: *"],
["10a06t8", r"empty HRP: *"],
["1qzzfhee", r"empty HRP: *"],
]
for addr, err_msg in invalid_checksum:
with pytest.raises(BTClibValueError, match=err_msg):
b32decode(addr)