MiNode/minode/pow.py
2017-07-01 17:21:02 +02:00

47 lines
1.3 KiB
Python

import base64
import hashlib
import logging
import multiprocessing
import shared
import struct
import threading
import time
import structure
def _pow_worker(target, initial_hash, q):
nonce = 0
logging.debug("target: {}, initial_hash: {}".format(target, base64.b16encode(initial_hash).decode()))
trial_value = target + 1
while trial_value > target:
nonce += 1
trial_value = struct.unpack('>Q', hashlib.sha512(hashlib.sha512(struct.pack('>Q', nonce) + initial_hash).digest()).digest()[:8])[0]
q.put(struct.pack('>Q', nonce))
def _worker(obj):
q = multiprocessing.Queue()
p = multiprocessing.Process(target=_pow_worker, args=(obj.pow_target(), obj.pow_initial_hash(), q))
logging.debug("Starting POW process")
t = time.time()
p.start()
nonce = q.get()
p.join()
logging.debug("Finished doing POW, nonce: {}, time: {}s".format(nonce, time.time() - t))
obj = structure.Object(nonce, obj.expires_time, obj.object_type, obj.version, obj.stream_number, obj.object_payload)
logging.debug("Object vector is {}".format(base64.b16encode(obj.vector).decode()))
with shared.objects_lock:
shared.objects[obj.vector] = obj
shared.vector_advertise_queue.put(obj.vector)
def do_pow_and_publish(obj):
t = threading.Thread(target=_worker, args=(obj, ))
t.start()