November 2019
Beginner to intermediate
408 pages
9h 29m
Korean
Content preview from 밑바닥부터 시작하는 비트코인
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6
장
스크립트
191
스크립트에서 대부분의 기능은 사실 많이 사용되지 않기 때문에 이렇게 버전을 올리면서 오피
코드를 비활성화시킬 수 있습니다. 그래도 코드는 계속해서 (불가능하게 된 오피코드를 포함
해서 ) 유지보수해야 하기 때문에 소프트웨어 유지보수 관점에서 이러한 변경은 그리 좋은 것
이 아닐 수 있습니다. 하지만 특정 기능을 단순화하고 제거하면 비트코인이 더욱 안전해질 수
있습니다.
이것은 스마트 계약 언어를 확장하려고 하는 여타 프로젝트와는 완전히 대조적입니다. 어쨌든
새로운 기능이 추가되면 보안 공격을 당할 여지가 많습니다.
연습문제
6.4
다음 스크립트가 어떤 일을 하는지 확인하시오 (
Script
.
parse
메서드를 활용하고
https
://
en
.
bitcoin
.
it
/
wiki
/
Script
에서 다양한 오피코드를 확인하시오 ).
6e879169a77ca787
•
69
=
OP
_
VERIFY
•
6e
=
OP
_
2DUP
•
7c
=
OP
_
SWAP
•
87
=
OP
_
EQUAL
•
91
=
OP
_
NOT
•
a7
=
OP
_
SHA
1
6.10.2
해시충돌 발견 상금 이벤트
2013
년 피터 토드
Peter
Todd
는 [연습문제
6
.
4
]의 스크립트와 유사한 스크립트로 약간의 비트코인
을 잠그고 누구든 해시충돌을 찾은 사람은 이를 가져갈 수 있게 했습니다. 약간의 비트코인은
2
.
49153717BTC ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.