key = i.to_bytes(32, 'big')
h = hash_.copy()
h.update(key)
if h.hexdigest().endswith(block.magicnumber):
return key
raise ValueError('not found key')
if __name__ == '__main__':
import datetime
import functools
user = User.generate()
root = Block.make_root(user)
child = Block(root)
oldtime = datetime.datetime.now()
timediffs = []
print('{:5d}: {}({}) [{}]'.format(0, datetime.datetime.now(),
datetime.timedelta(0), root.key.hex()))
while True:
key = mining(child)
child = child.close(user, key)
now = datetime.datetime.now()
timediffs.append(now - oldtime)
oldtime = now
print('{:5d}: {}({}) [{}]'.format(
