def testChecksum(self):
data = [
('test', '954d5a49'),
('pycoin', '58709a9f')
]
for d, h in data:
self.assertEquals(utils.checksum(d).encode('hex'), h)
self.assertEquals(utils.doubleSha256(d)[:4].encode('hex'), h)
def hash(self):
"""
If we have the hash saved from a parsing action we just return it
otherwise we serialize this transaction and calculate the 2xSha256.
If the hash is derived from a serialization we do not cache the result
should happen rarely though.
"""
buf = BytesIO()
self.toWire(buf, {'segwit': False})
return doubleSha256(buf.getvalue())[::-1]
def hash(self):
"""
If we have the hash saved from a parsing action we just return it
otherwise we serialize this transaction and calculate the 2xSha256.
If the hash is derived from a serialization we do not cache the result
should happen rarely though.
"""
buf = BytesIO()
self.toWire(buf, PROTOCOL_VERSION)
return doubleSha256(buf.getvalue())[::-1]
def hash(self):
"""
If we have the hash saved from a parsing action we just return it
otherwise we serialize this transaction and calculate the 2xSha256.
If the hash is derived from a serialization we do not cache the result
should happen rarely though.
"""
if self._hash:
return self._hash
else:
buf = BytesIO()
self.toWire(buf, {'segwit': False, 'version': PROTOCOL_VERSION})
return doubleSha256(buf.getvalue()[:80])[::-1]
def parse(self, payload, opts):
Packet.parse(self, payload, opts)
self.version, self.prev_block, self.merkle_root = struct.unpack(
'<I32s32s', payload.read(68))
self.prev_block = self.prev_block[::-1]
self.merkle_root = self.merkle_root[::-1]
self.timestamp, self.bits, self.nonce = struct.unpack(
'<III', payload.read(12))
transactionCount = decodeVarLength(payload)
while len(self.transactions) < transactionCount:
t = TxPacket()
t.parse(payload, opts)
self.transactions.append(t)
self._hash = doubleSha256(payload.getvalue()[:80])[::-1]
def normalized_hash(self):
if self.is_coinbase():
return self.hash()
else:
copy = TxPacket()
buf = BytesIO()
self.toWire(buf, None)
copy.parse(BytesIO(buf.getvalue()), None)
for pos, iput in enumerate(copy.inputs):
copy.inputs[pos] = (iput[0], "", iput[2])
buf = BytesIO()
copy.toWire(buf, None)
buf.write(struct.pack('<I', 1))
return doubleSha256(buf.getvalue())[::-1]
def parse(self, payload, version):
Packet.parse(self, payload, version)
self.version, self.prev_block, self.merkle_root = struct.unpack(
'<I32s32s', payload.read(68))
self.prev_block = self.prev_block[::-1]
self.merkle_root = self.merkle_root[::-1]
self.timestamp, self.bits, self.nonce = struct.unpack(
'<III', payload.read(12))
transactionCount = decodeVarLength(payload)
while len(self.transactions) < transactionCount:
t = TxPacket()
t.parse(payload, version)
self.transactions.append(t)
self._hash = doubleSha256(payload.getvalue()[:80])[::-1]
def normalized_hash(self):
if self.is_coinbase():
return self.hash()
else:
copy = TxPacket()
buf = BytesIO()
self.toWire(buf, None)
copy.parse(BytesIO(buf.getvalue()), None)
for pos, iput in enumerate(copy.inputs):
copy.inputs[pos] = (iput[0], "", iput[2])
buf = BytesIO()
copy.toWire(buf, None)
buf.write(struct.pack('<I', 1))
return doubleSha256(buf.getvalue())[::-1]
def whash(self):
if self.is_coinbase():
return "\x00" * 32
buf = BytesIO()
self.toWire(buf, {'segwit': self.is_segwit})
return doubleSha256(buf.getvalue())[::-1]
def whash(self):
if self.is_coinbase():
return "00".decode('hex')*32
buf = BytesIO()
self.toWire(buf, {'segwit': self.is_segwit})
return doubleSha256(buf.getvalue())[::-1]
