《区块链编程》第八章

《区块链编程》第八章

支付到脚本哈希

练习1

p140

代码实现

# -*- coding: utf-8 -*-
# @Author: 从化北(喵星人)
# @Date:   2022-01-12 15:15:30
# @Last Modified by:   从化北
# @Last Modified time: 2022-01-12 15:15:30
def op_checkmultisig(stack, z):
    if len(stack) < 1:
        return False
    n = decode_num(stack.pop())
    if len(stack) < n + 1:
        return False
    sec_pubkeys = []
    for _ in range(n):
        sec_pubkeys.append(stack.pop())
    m = decode_num(stack.pop())
    if len(stack) < m + 1:
        return False
    der_signatures = []
    for _ in range(m):
        der_signatures.append(stack.pop()[:-1])  # <1>
    stack.pop()  # <2>
    try:
        # parse all the points
        points = [S256Point.parse(sec) for sec in sec_pubkeys]
        # parse all the signatures
        sigs = [Signature.parse(der) for der in der_signatures]
        # loop through the signatures
        for sig in sigs:
            # if we have no more points, signatures are no good
            if len(points) == 0:
                return False
            # we loop until we find the point which works with this signature
            while points:
                # get the current point from the list of points