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밑바닥부터 시작하는 비트코인
book

밑바닥부터 시작하는 비트코인

by 류정필, 송재준
November 2019
Beginner to intermediate
408 pages
9h 29m
Korean
Hanbit Media, Inc.
Content preview from 밑바닥부터 시작하는 비트코인
8
장
p2sh 스크립트
229
8.5
p2sh
스크립트 코딩하기
p2sh
스크립트를 처리하는 코드는 리딤 스크립트,
OP
_
HASH160
,
hash160
해시값,
OP
_
EQUAL
로 이어지는 일련의 명령어 배치 패턴을 포착하고 예외 처리를 해야 합니다.
script
.
py
파일 안
에
evaluate
메서드에서 이런 예외 처리를 합니다.
class Script:
...
def evaluate(self, z):
...
while len(cmds) > 0:
cmd = cmds.pop(0)
if type(cmd) == int:
...
else:
stack.append(cmd)
if len(cmds) == 3 and cmds[0] == 0xa9 \
and type(cmds[1]) == bytes and len(cmds[1]) == 20 \
and cmds[2] == 0x87:
➊
cmds.pop()
➋
h160 = cmds.pop()
cmds.pop()
if not op_hash160(stack):
➌
return False
stack.append(h160)
if not op_equal(stack):
return False
if not op_verify(stack):
➍
LOGGER.info('bad p2sh h160')
return False
redeem_script ...
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Publisher Resources

ISBN: 9791162248294