November 2019
Beginner to intermediate
408 pages
9h 29m
Korean
Content preview from 밑바닥부터 시작하는 비트코인
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밑바닥부터 시작하는 비트코인
280
11.6
블록에서 머클루트 계산하기
블록 안의 트랜잭션으로 해시값을 구하고 이로부터 머클루트를 구하는 것은 지금까지 설명한
것과 다를 바 없지만 실제 계산 시 엔디언 문제를 조심해야 합니다. 자세히 설명하면 먼저 머클
트리의 각 단말 노드를 리틀엔디언으로 읽습니다. 이후 머클루트를 계산하고 최종 결과는 다시
리틀엔디언으로 표현합니다.
결국 이는 단말 노드의 해시값 바이트 열을 뒤에서 읽어 머클루트를 계산하고 얻은 값을 다시
뒤에서 읽어 기록하게 됩니다.
>>> from helper import merkle_root
>>> tx_hex_hashes = [
... '42f6f52f17620653dcc909e58bb352e0bd4bd1381e2955d19c00959a22122b2e',
... '94c3af34b9667bf787e1c6a0a009201589755d01d02fe2877cc69b929d2418d4',
... '959428d7c48113cb9149d0566bde3d46e98cf028053c522b8fa8f735241aa953',
... 'a9f27b99d5d108dede755710d4a1ffa2c74af70b4ca71726fa57d68454e609a2',
... '62af110031e29de1efcad103b3ad4bec7bdcf6cb9c9f4afdd586981795516577' ...
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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.