Onionr/src/onionrproofs/__init__.py

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"""Onionr - Private P2P Communication.
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Proof of work module
"""
import multiprocessing, time, math, threading, binascii, sys, json
import nacl.encoding, nacl.hash, nacl.utils
import config
import logger
from oldblocks import onionrblockapi
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from onionrutils import bytesconverter
from onionrcrypto import hashers
from .blocknoncestart import BLOCK_NONCE_START_INT
"""
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This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
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"""
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config.reload()
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def getDifficultyForNewBlock(data):
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"""
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Get difficulty for block. Accepts size in integer, Block instance, or str/bytes full block contents
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"""
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if isinstance(data, onionrblockapi.Block):
dataSizeInBytes = len(bytesconverter.str_to_bytes(data.getRaw()))
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else:
dataSizeInBytes = len(bytesconverter.str_to_bytes(data))
minDifficulty = config.get('general.minimum_send_pow', 4)
totalDifficulty = max(minDifficulty, math.floor(dataSizeInBytes / 1000000.0))
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return totalDifficulty
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def getHashDifficulty(h: str):
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"""
Return the amount of leading zeroes in a hex hash string (hexHash)
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"""
return len(h) - len(h.lstrip('0'))
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def hashMeetsDifficulty(hexHash):
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"""
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Return bool for a hash string to see if it meets pow difficulty defined in config
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"""
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hashDifficulty = getHashDifficulty(hexHash)
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try:
expected = int(config.get('general.minimum_block_pow'))
except TypeError:
raise ValueError('Missing general.minimum_block_pow config')
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return hashDifficulty >= expected
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