November 2019
Beginner to intermediate
408 pages
9h 29m
Korean
Content preview from 밑바닥부터 시작하는 비트코인
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373
부록
A
연습문제 해답
OP_DUP OP_HASH160 ab0c0b2e98b1ab6dbf67d4750b0a56244948a879 \
OP_EQUALVERIFY OP_CHECKSIG
>>> print(tx_obj.tx_outs[1].amount)
40000000
연습문제
5.6
Tx
클래스의
fee
메서드를 작성하시오.
class Tx:
...
def fee(self, testnet=False):
input_sum, output_sum = 0, 0
for tx_in in self.tx_ins:
input_sum += tx_in.value(testnet=testnet)
for tx_out in self.tx_outs:
output_sum += tx_out.amount
return input_sum - output_sum
6장 스크립트
연습문제
6.1
op
_
hash160
연산함수를 작성하시오.
def op_hash160(stack):
if len(stack) < 1:
return False
element = stack.pop()
h160 = hash160(element)
stack.append(h160)
return True
밑바닥부터 시작하는 비트코인
374
연습문제
6.2
op
.
py
파일에서 연산함수
op
_
checksig
를 작성하시오.
def op_checksig
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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.