39 lines
1.2 KiB
Python
39 lines
1.2 KiB
Python
from .. import hashers
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import config, onionrproofs, logger
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import onionrexceptions
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def verify_POW(blockContent):
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'''
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Verifies the proof of work associated with a block
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'''
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retData = False
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dataLen = len(blockContent)
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try:
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blockContent = blockContent.encode()
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except AttributeError:
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pass
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blockHash = hashers.sha3_hash(blockContent)
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try:
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blockHash = blockHash.decode() # bytes on some versions for some reason
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except AttributeError:
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pass
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difficulty = onionrproofs.getDifficultyForNewBlock(blockContent)
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if difficulty < int(config.get('general.minimum_block_pow')):
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difficulty = int(config.get('general.minimum_block_pow'))
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mainHash = '0000000000000000000000000000000000000000000000000000000000000000'#nacl.hash.blake2b(nacl.utils.random()).decode()
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puzzle = mainHash[:difficulty]
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if blockHash[:difficulty] == puzzle:
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# logger.debug('Validated block pow')
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retData = True
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else:
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logger.debug(f"Invalid token, bad proof for {blockHash} {puzzle}")
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raise onionrexceptions.InvalidProof('Proof for %s needs to be %s' % (blockHash, puzzle))
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return retData
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