November 2019
Beginner to intermediate
408 pages
9h 29m
Korean
Content preview from 밑바닥부터 시작하는 비트코인
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밑바닥부터 시작하는 비트코인
164
그림
6-3
OP
_
DUP
은 스택 위의 원소와 동일한 원소를 다시 스택 위에 올립니다.
스크립트가 유효하기 위해서 모든 명령어가 실행된 후 스택 위에는
0
이 아닌 원소가 남아야 합
니다. 스택 위에 아무것도 없거나
0
이 남아 있다면 스크립트는 유효하지 않은 것으로 간주합니
다. 스크립트가 유효하지 않으면 해제 스크립트 부분을 포함하는 트랜잭션이 네트워크에서 거
절되어 전파되지 않습니다.
6.3
주요 연산자
OP
_
DUP
말고도 많은 연산자가 있습니다.
OP
_
HASH160
(그림
6
-
4
)은 스택 위의 원소
1
개를 가
져와서
sha256
해시값의
ripemd160
해시값 (
hash160
이라고도 함 )을 새로운 원소로 스택
위에 추가합니다. [그림
6
-
4
]에서
y
는
hash160
(
x
)
입니다.
그림
6-4
OP
_
HASH160
은 스택 위의 원소를 이의
hash160
해시값으로 바꾸어 놓습니다.
또 다른 중요한 연산자로는
OP
_
CHECKSIG
(그림
6
-
5
)이 있습니다.
OP
_
CHECKSIG
은 스택 위
2
개의 원소를 가져와서 첫 번째 원소는 공개키로, 두 번째 원소는 서명으로 간주하여 서명을
공개키로 검증합니다. 만약 검증된다면
1
을 스택 위로 올리고 그렇지 않으면
0
을 올립니다.
그림
6-5
OP
_
CHECKSIG
은 공개키(<
pubkey
>)로 ...
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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.