밑바닥부터 시작하는 비트코인

383

부록

A

연습문제 해답

>>> sig = Signature.parse(der)

>>> print(point.verify(z, sig))

True

연습문제

8.5

p2sh

트랜잭션을 검증할 수 있도록

sig

_

hash

와

verify

_

input

메서드를 수정하시오.

class Tx:

...

def sig_hash(self, input_index, redeem_script=None):

'''Returns the integer representation of the hash that needs to get

signed for index input_index'''

s = int_to_little_endian(self.version, 4)

s += encode_varint(len(self.tx_ins))

for i, tx_in in enumerate(self.tx_ins):

if i == input_index:

if redeem_script:

script_sig = redeem_script

else:

script_sig = tx_in.script_pubkey(self.testnet)

else:

script_sig = None

s += TxIn(

prev_tx=tx_in.prev_tx,

prev_index=tx_in.prev_index,

script_sig=script_sig ...