def test_prefix(self):
with self.assertRaises(ValueError):
cashaddr.decode(":ppm2qsznhks23z7629mms6s4cwef74vcwvn0h82")
with self.assertRaises(ValueError):
cashaddr.decode("ppm2qsznhks23z7629mms6s4cwef74vcwvn0h82")
with self.assertRaises(ValueError):
cashaddr.decode(
"bitcoin cash:ppm2qsznhks23z7629mms6s4cwef74vcwvn0h82")
with self.assertRaises(ValueError):
cashaddr.decode("bitcoin cash:ab")
# b is invalid
with self.assertRaises(ValueError):
cashaddr.decode(
"bitcoincash:ppm2qsznbks23z7629mms6s4cwef74vcwvn0h82")
def test_valid_pubkeys(self):
"""Test whether valid P2SH addresses decode to the correct output."""
for (address, hashbytes) in zip(VALID_PUBKEY_ADDRESSES, VALID_HASHES):
rprefix, kind, addr_hash = cashaddr.decode(address)
self.assertEqual(rprefix, BCH_PREFIX)
self.assertEqual(kind, cashaddr.PUBKEY_TYPE)
self.assertEqual(addr_hash, hashbytes)
def test_valid_scripthash(self):
"""Test whether valid P2PK addresses decode to the correct output."""
for (address, hashbytes) in zip(VALID_SCRIPT_ADDRESSES, VALID_HASHES):
rprefix, kind, addr_hash = cashaddr.decode(address)
self.assertEqual(rprefix, BCH_PREFIX)
self.assertEqual(kind, cashaddr.SCRIPT_TYPE)
self.assertEqual(addr_hash, hashbytes)
def test_bad_decode_size(self):
"""Test that addresses with invalid sizes fail to decode."""
for bits_size in self.valid_sizes:
size = bits_size // 8
# Convert to a valid number of bytes for a hash
hashbytes = bytes(random.randint(0, 255) for i in range(size))
payload = cashaddr._pack_addr_data(cashaddr.PUBKEY_TYPE, hashbytes)
# Add some more 5-bit data after size has been encoded
payload += bytes(random.randint(0, 15) for i in range(3))
# Add checksum
payload += cashaddr._create_checksum(BCH_PREFIX, payload)
addr = BCH_PREFIX + ':' + ''.join(cashaddr._CHARSET[d]
for d in payload)
# Check decode fails. This can trigger the length mismatch,
# excess padding, or non-zero padding errors
with self.assertRaises(ValueError):
cashaddr.decode(addr)
def test_address_case(self):
cashaddr.decode(
"bitcoincash:ppm2qsznhks23z7629mms6s4cwef74vcwvn0h829pq")
cashaddr.decode(
"BITCOINCASH:PPM2QSZNHKS23Z7629MMS6S4CWEF74VCWVN0H829PQ")
with self.assertRaises(ValueError):
cashaddr.decode(
"bitcoincash:PPM2QSZNHKS23Z7629MMS6S4CWEF74VCWVN0H829PQ")
with self.assertRaises(ValueError):
cashaddr.decode(
"bitcoincash:ppm2qsznhks23z7629mmS6s4cwef74vcwvn0h829pq")
def test_bad_decode_checksum(self):
"""Test whether addresses with invalid checksums fail to decode."""
for bits_size in self.valid_sizes:
size = bits_size // 8
# Convert to a valid number of bytes for a hash
hashbytes = bytes(random.randint(0, 255) for i in range(size))
addr = cashaddr.encode_full(BCH_PREFIX, cashaddr.PUBKEY_TYPE,
hashbytes)
addrlist = list(addr)
# Inject an error
values = list(cashaddr._CHARSET)
while True:
pos = random.randint(0, len(addr) - 1)
choice = random.choice(values)
if choice != addrlist[pos] and addrlist[pos] in values:
addrlist[pos] = choice
break
mangled_addr = ''.join(addrlist)
with self.assertRaises(ValueError) as e:
cashaddr.decode(mangled_addr)
self.assertTrue('invalid checksum' in e.exception.args[0])
def from_cashaddr_string(cls, string):
'''Construct from a cashaddress string.'''
if not string.startswith(NetworkConstants.CASHADDR_PREFIX):
string = ':'.join([NetworkConstants.CASHADDR_PREFIX, string])
prefix, kind, addr_hash = cashaddr.decode(string)
if prefix != NetworkConstants.CASHADDR_PREFIX:
raise AddressError(
'address has unexpected prefix {}'.format(prefix))
if kind == cashaddr.PUBKEY_TYPE:
return cls(addr_hash, cls.ADDR_P2PKH)
else:
assert kind == cashaddr.SCRIPT_TYPE
return cls(addr_hash, cls.ADDR_P2SH)
def test_encode_decode(self):
"""Test whether valid addresses encode and decode properly, for all
valid hash sizes.
"""
for prefix in (BCH_PREFIX, BCH_TESTNET_PREFIX):
for bits_size in self.valid_sizes:
size = bits_size // 8
# Convert to a valid number of bytes for a hash
hashbytes = bytes(random.randint(0, 255) for i in range(size))
addr = cashaddr.encode_full(prefix, cashaddr.PUBKEY_TYPE,
hashbytes)
rprefix, kind, addr_hash = cashaddr.decode(addr)
self.assertEqual(rprefix, prefix)
self.assertEqual(kind, cashaddr.PUBKEY_TYPE)
self.assertEqual(addr_hash, hashbytes)
def from_cashaddr_string(cls, string):
'''Construct from a cashaddress string.'''
prefix = NetworkConstants.CASHADDR_PREFIX
if string.upper() == string:
prefix = prefix.upper()
if not string.startswith(prefix + ':'):
string = ':'.join([prefix, string])
addr_prefix, kind, addr_hash = cashaddr.decode(string)
if addr_prefix != prefix:
raise AddressError('address has unexpected prefix {}'
.format(addr_prefix))
if kind == cashaddr.PUBKEY_TYPE:
return cls(addr_hash, cls.ADDR_P2PKH)
else:
assert kind == cashaddr.SCRIPT_TYPE
return cls(addr_hash, cls.ADDR_P2SH)
def test_decode_bad_inputs(self):
with self.assertRaises(TypeError):
cashaddr.decode(b'foobar')
