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45 lines
1.1 KiB
Python
45 lines
1.1 KiB
Python
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# example of proof-of-work algorithm
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import hashlib
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import time
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max_nonce = 1000000000 # 1 billion
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def proof_of_work(header, difficulty):
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target = 2<<(256-difficulty)
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for nonce in xrange(max_nonce):
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hash_result = hashlib.sha256(str(header)+str(nonce)).hexdigest()
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if long(hash_result, 16) < target:
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print "Success with nonce %d" % nonce
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print "Hash is %s" % hash_result
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return nonce
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print "Failed after %d (max_nonce) tries" % nonce
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return nonce
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if __name__ == '__main__':
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difficulty = 24
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print "Difficulty: %d" % difficulty
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print "Starting search..."
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start_time = time.time()
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nonce = proof_of_work('test header', difficulty) # 5 bits of difficulty
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end_time = time.time()
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elapsed_time = end_time - start_time
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print "Elapsed Time: %.2f seconds" % elapsed_time
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if elapsed_time > 0:
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hash_power = float(long(nonce)/elapsed_time)
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print "Hashing Power: %ld hashes per second" % hash_power
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