def parse_script(self, unlock_script, lock_script , txid) -> bool:
# print(f'@@@@@@@@@@@@@@@@{unlock_script}\n{lock_script}')
self.tx_hash = txid
size, padd = var_int.varint_to_int(unlock_script)
# print (unlock_script[padd:size*2 + padd])
sig = bytearray.fromhex(unlock_script[padd:size*2 + padd])[:-1]
unlock_script = unlock_script[size*2 + padd:]
size, padd = var_int.varint_to_int(unlock_script)
# print (unlock_script[padd:size*2 + padd])
pubKey = bytearray.fromhex(unlock_script[padd:size*2 + padd])
self.stack.append(sig)
self.stack.append(pubKey)
skip = 0
i = len(lock_script)
while i > 0:
if len(lock_script) == 0:
break
if skip:
self.stack.append(bytearray.fromhex(lock_script[:skip*2]))
lock_script = lock_script[(skip * 2 - 2):]
i-= (skip * 2 - 2)
skip = 0
elif lock_script[0:2] in self.func:
if not self.func[lock_script[0:2]]():
return False
else:
skip = int(lock_script[0:2],16)
lock_script = lock_script[2:]
i -= 1
return True if self.stack[-1] == b'\x01' else False
def deserialize_output(s):
padd = 0
r_o = Output()
r_o.value = int.from_bytes(bytearray.fromhex(s[0:16]), byteorder='little') #? value
padd += 16
s = s[16:]
r_o.script_pub_key_size, v_int = var_int.varint_to_int(s) #? script pub_key size
padd += v_int
s = s[v_int:]
r_o.script_pub_key = s[0:r_o.script_pub_key_size * 2] #? script pub_key
padd += r_o.script_pub_key_size * 2
a_len , v_int = var_int.varint_to_int(r_o.script_pub_key[5:7])
r_o.recipient_address = r_o.script_pub_key[5 + v_int: a_len] #? p2pkh getting addres from
return (r_o, padd)
def deserialize(s) -> Transaction:
tx = Transaction()
tx.version = int.from_bytes(bytearray.fromhex(s[0:8]), byteorder = "little")
s = s[8:]
tx.input_count, v_int = var_int.varint_to_int(s)
s = s[v_int:]
for i in range(0,tx.input_count):
inp , padd = Deserializer.deserialize_input(s)
tx.inputs.append(inp)
s = s[padd:]
tx.output_count, v_int = var_int.varint_to_int(s)
s = s[v_int:]
for i in range (0, tx.output_count):
otp, padd = Deserializer.deserialize_output(s)
tx.outputs.append(otp)
s = s[padd:]
return tx
def recipient_address(self):
if self.script_pub_key == "":
return ""
a_len, v_int = var_int.varint_to_int(self.script_pub_key[4:])
hex160 = bytearray.fromhex(
self.script_pub_key[(4 + v_int):(a_len * 2 + (4 + v_int))])
return wallet.covert_to_address(hex160=hex160,
net=0x6f) #! net identificator
def deserialize_output(s):
'return output and it`s n chars'
padd = 0
r_o = Output()
r_o.value = int.from_bytes(bytearray.fromhex(s[0:16]),
byteorder='little') #? value
padd += 16
s = s[16:]
r_o.script_pub_key_size, v_int = var_int.varint_to_int(
s) #? script pub_key size
padd += v_int
s = s[v_int:]
r_o.script_pub_key = s[0:r_o.script_pub_key_size *
2] #? script pub_key
padd += r_o.script_pub_key_size * 2
return (r_o, padd)
def deserialize_input(s):
padd = 0
r_i = Input()
r_i.txid = (bytearray.fromhex(s[0:64]))[::-1] #?txid
padd += 64
s = s[64:]
r_i.vout = int.from_bytes(bytearray.fromhex(s[0:8]), byteorder='little') #?vout
padd += 8
s = s[8:]
r_i.scriptsigsize, v_int = var_int.varint_to_int(s) #?sript sig size
padd += v_int
s = s[v_int:]
r_i.scriptsig = s[0:r_i.scriptsigsize * 2] #? script sig
padd += r_i.scriptsigsize * 2
s = s[r_i.scriptsigsize * 2:]
r_i.sequence = bytearray.fromhex(s[0:8])[::-1] #? sequence
padd += 8
return (r_i, padd)