November 2019
Beginner to intermediate
408 pages
9h 29m
Korean
Content preview from 밑바닥부터 시작하는 비트코인
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6
장
스크립트
163
6.2
스크립트 실행
스크립트는 프로그래밍 언어입니다. 그리고 스크립트에서는 주어진 명령어
command
를 한 번에
하나씩 스택을 기반으로 처리합니다. 그리고, 명령어에는 두 종류가 있습니다. 하나는 원소
element
이고 다른 하나는 연산자
operation
입니다.
1
원소는 스크립트 실행 명령어 집합 안에서 사용되는 데이터를 의미합니다. 스크립트에서 원소
를 처리한다는 것은 그 원소를 스택 위에 올리는 것입니다. 이 책의 파이썬 라이브러리에서 원
소는 길이가
1
에서
520
까지 범위의
bytes
형 상수입니다. 원소의 예로
DER
서명이나
SEC
공
개키를 들 수 있습니다 (그림
6
-
1
).
그림
6-1
스크립트 원소(
elements
)
연산자는 데이터에 대해 무언가를 합니다(그림
6
-
2
). 구체적으로 연산자는 스택 위에 원소를
꺼내지 않거나 또는
1
개 이상 꺼내 모종의 계산을 한 후 아무 일도 안 하거나 또는
1
개 이상의
새로운 원소들을 스택 위에 올립니다.
그림
6-2
연산자(
operations
)
연산자의 예로
OP
_
DUP
이 있습니다 (그림
6
-
3
).
2
OP
_
DUP
은 스택 위의 원소를 복사해서 만든 원
소를 스택 위에 올립니다. 즉 동일한 원소
2
개가 스택 위에 올라가게 됩니다.
1
사실 여기에서 연산자는 꼭 어떤 연산만 하지는 않는다.
OP
_
IF
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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.