def serialize(self):
'''Serialize this message to send over the network'''
# version is 4 bytes little endian
result = int_to_little_endian(self.version, 4)
# services is 8 bytes little endian
result += int_to_little_endian(self.services, 8)
# timestamp is 8 bytes little endian
result += int_to_little_endian(self.timestamp, 8)
# receiver services is 8 bytes little endian
result += int_to_little_endian(self.receiver_services, 8)
# IPV4 is 10 00 bytes and 2 ff bytes then receiver ip
result += b'\x00' * 10 + b'\xff\xff' + self.receiver_ip
# receiver port is 2 bytes, big endian
result += self.receiver_port.to_bytes(2, 'big')
# sender services is 8 bytes little endian
result += int_to_little_endian(self.sender_services, 8)
# IPV4 is 10 00 bytes and 2 ff bytes then sender ip
result += b'\x00' * 10 + b'\xff\xff' + self.sender_ip
# sender port is 2 bytes, big endian
result += self.sender_port.to_bytes(2, 'big')
# nonce should be 8 bytes
result += self.nonce
# useragent is a variable string, so varint first
result += serialize_varint(len(self.user_agent))
result += self.user_agent
# latest block is 4 bytes little endian
result += int_to_little_endian(self.latest_block, 4)
# relay is 00 if false, 01 if true
if self.relay:
result += b'\x01'
else:
result += b'\x00'
return result
def serialize(self):
# get the raw serialization (no prepended length)
result = self.raw_serialize()
# get the length of the whole thing
total = len(result)
# serialize_varint the total length of the result and prepend
return serialize_varint(total) + result
def serialize(self):
# start with the number of items as a varint
result = serialize_varint(len(self.data))
# loop through each tuple (data_type, identifier) in self.data
for data_type, identifier in self.data:
# data type is 4 bytes Little-Endian
result += int_to_little_endian(data_type, 4)
# identifier needs to be in Little-Endian
result += identifier[::-1]
return result
def serialize(self):
'''Serialize this message to send over the network'''
# protocol version is 4 bytes little-endian
result = int_to_little_endian(self.version, 4)
# number of hashes is a varint
result += serialize_varint(self.num_hashes)
# start block is in little-endian
result += self.start_block[::-1]
# end block is also in little-endian
result += self.end_block[::-1]
return result
def serialize(self):
# FIXME: DELETE
'''Returns the byte serialization of the transaction'''
# serialize version (4 bytes, little endian)
result = int_to_little_endian(self.version, 4)
# serialize_varint on the number of inputs
result += serialize_varint(len(self.tx_ins))
# iterate inputs
for tx_in in self.tx_ins:
# serialize each input
result += tx_in.serialize()
# serialize_varint on the number of outputs
result += serialize_varint(len(self.tx_outs))
# iterate outputs
for tx_out in self.tx_outs:
# serialize each output
result += tx_out.serialize()
# serialize locktime (4 bytes, little endian)
result += int_to_little_endian(self.locktime, 4)
return result
def sig_hash(self, input_index, script_pubkey, redeem_script=None):
# FIXME: DELETE
'''Returns the byte serialization of the transaction'''
'''Returns the integer representation of the hash that needs to get
signed for index input_index'''
# start the serialization with version
# use int_to_little_endian in 4 bytes
s = int_to_little_endian(self.version, 4)
# add how many inputs there are using serialize_varint
s += serialize_varint(len(self.tx_ins))
# loop through each input using enumerate, so we have the input index
for i, tx_in in enumerate(self.tx_ins):
# if the input index is the one we're signing
if i == input_index:
# if the RedeemScript was passed in, that's the ScriptSig
# otherwise the previous tx's ScriptPubkey is the ScriptSig
# script_sig = tx_in.script_pubkey(self.testnet)
script_sig = script_pubkey
# Otherwise, the ScriptSig is empty
else:
script_sig = None
# add the serialization of the input with the ScriptSig we want
s += TxIn(
prev_tx=tx_in.prev_tx,
prev_index=tx_in.prev_index,
script_sig=script_sig,
sequence=tx_in.sequence,
).serialize()
# add how many outputs there are using serialize_varint
s += serialize_varint(len(self.tx_outs))
# add the serialization of each output
for tx_out in self.tx_outs:
s += tx_out.serialize()
# add the locktime using int_to_little_endian in 4 bytes
s += int_to_little_endian(self.locktime, 4)
# add SIGHASH_ALL using int_to_little_endian in 4 bytes
s += int_to_little_endian(SIGHASH_ALL, 4)
# double_sha256 the serialization
h256 = double_sha256(s)
# convert the result to an integer using int.from_bytes(x, 'big')
return int.from_bytes(h256, 'big')