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