tools.py

import pt, custom
from json import dumps as package, loads as unpackage

#def pub2addr(pubkey): return pt.pubtoaddr(pubkey)

def sign(msg, privkey): return pt.ecdsa_sign(msg, privkey)

def verify(msg, sig, pubkey): return pt.ecdsa_verify(msg, sig, pubkey)

def privtopub(privkey): return pt.privtopub(privkey)

def det_hash(x):#deterministically takes sha256 of dict, list, int, or string

    def det_list(l): return '[%s]' % ','.join(map(det, sorted(l)))
    
    def det_dict(x): 
        list_=map(lambda p: det(p[0]) + ':' + det(p[1]), sorted(x.items()))
        return '{%s}' % ','.join(list_)
        
    def det(x): return {list: det_list, dict: det_dict}.get(type(x), str)(x)
    
    return custom.hash_(det(unpackage(package(x))))

def base58_encode(num):
    num=int(num, 16)
    alphabet = '123456789abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ'
    base_count = len(alphabet)
    encode = ''
    if (num < 0): return ''
    while (num >= base_count):
        mod = num % base_count
        encode = alphabet[mod] + encode
        num = num / base_count
    if (num): encode = alphabet[num] + encode
    return encode

def make_address(pubkeys, n): #n is the number of pubkeys required to spend from this address
    return str(len(pubkeys))+str(n)+base58_encode(det_hash({str(n):pubkeys}))[0:29]

def buffer_(str, size):
    if len(str)<size: return buffer_('0'+str, size)
    return str