November 2019
Beginner to intermediate
408 pages
9h 29m
Korean
Content preview from 밑바닥부터 시작하는 비트코인
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밑바닥부터 시작하는 비트코인
166
연습문제
6.1
op
_
hash160
연산함수를 작성하시오.
6.4
스크립트 파싱
잠금 스크립트(
ScriptPubKey
)와 해제 스크립트 (
ScriptSig
) 모두 같은 방식으로 파싱됩니
다. 파싱을 시작하고 처음 읽은 한 바이트 값이
n
이고 이 값이
0x01
~
0x4b
(
1
~
75
) 범위의 값
이면
n
바이트 길이만큼 이어서 읽은 숫자를 한 원소로 간주합니다. 그렇지 않으면 그 바이트
값은 오피코드를 의미합니다. 어떤 연산자를 의미하는 오피코드인지는 표를 보고 확인합니다.
아래는 이러한 연산자와 오피코드 대응표의 일부입니다.
•
0x00
-
OP
_
0
•
0x51
-
OP
_
1
•
0x60
-
OP
_
16
•
0x76
-
OP
_
DUP
•
0x93
-
OP
_
ADD
•
0xa9
-
OP
_
HASH160
•
0xac
-
OP
_
CHECKSIG
NOTE
_
75바이트보다 긴 원소 표현
만약
0
x
4
b
(
75
)바이트보다긴원소가필요한경우는어떻게할까요?그러한원소를다루기위해
3
개의연
산어가준비되어있습니다.
OP
_
PUSHDATA
1
,
OP
_
PUSHDATA
2
,
OP
_
PUSHDATA
4
가그것입니다.
OP
_
PUSHDATA
1
은바로이후의한바이트값이그다음읽을원소의길이정보를표현합니다.
OP
_
PUSHDATA
2
는바로이후
의
2
바이트 ...
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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.