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< h1 class = "title" > Module < code > src.onionrproofs< / code > < / h1 >
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< / header >
< section id = "section-intro" >
< p > Onionr - Private P2P Communication< / p >
< p > Proof of work module< / p >
< details class = "source" >
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< summary >
< span > Expand source code< / span >
< / summary >
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< pre > < code class = "python" > ' ' '
Onionr - Private P2P Communication
Proof of work module
' ' '
' ' '
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/> .
' ' '
import multiprocessing, time, math, threading, binascii, sys, json
import nacl.encoding, nacl.hash, nacl.utils
import config, logger
from onionrblocks import onionrblockapi, storagecounter
from onionrutils import bytesconverter
from onionrcrypto import hashers
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from .blocknoncestart import BLOCK_NONCE_START_INT
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config.reload()
def getDifficultyModifier():
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' ' ' returns the difficulty modifier for block storage based
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on a variety of factors, currently only disk use.
' ' '
percentUse = storagecounter.StorageCounter().get_percent()
difficultyIncrease = math.floor(4 * percentUse) # difficulty increase is a step function
return difficultyIncrease
def getDifficultyForNewBlock(data):
' ' '
Get difficulty for block. Accepts size in integer, Block instance, or str/bytes full block contents
' ' '
if isinstance(data, onionrblockapi.Block):
dataSizeInBytes = len(bytesconverter.str_to_bytes(data.getRaw()))
else:
dataSizeInBytes = len(bytesconverter.str_to_bytes(data))
minDifficulty = config.get(' general.minimum_send_pow' , 4)
totalDifficulty = max(minDifficulty, math.floor(dataSizeInBytes / 1000000.0)) + getDifficultyModifier()
return totalDifficulty
return retData
def getHashDifficulty(h: str):
' ' '
Return the amount of leading zeroes in a hex hash string (hexHash)
' ' '
return len(h) - len(h.lstrip(' 0' ))
def hashMeetsDifficulty(hexHash):
' ' '
Return bool for a hash string to see if it meets pow difficulty defined in config
' ' '
hashDifficulty = getHashDifficulty(hexHash)
try:
expected = int(config.get(' general.minimum_block_pow' ))
except TypeError:
raise ValueError(' Missing general.minimum_block_pow config' )
return hashDifficulty > = expected
class POW:
def __init__(self, metadata, data, threadCount = 1, minDifficulty=0):
self.foundHash = False
self.difficulty = 0
self.data = data
self.metadata = metadata
self.threadCount = threadCount
self.hashing = False
json_metadata = json.dumps(metadata).encode()
try:
self.data = self.data.encode()
except AttributeError:
pass
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if minDifficulty > 0:
self.difficulty = minDifficulty
else:
# Calculate difficulty. Dumb for now, may use good algorithm in the future.
self.difficulty = getDifficultyForNewBlock(bytes(json_metadata + b' \n' + self.data))
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logger.info(' Computing POW (difficulty: %s)...' % (self.difficulty,))
self.mainHash = ' 0' * 64
self.puzzle = self.mainHash[0:min(self.difficulty, len(self.mainHash))]
for i in range(max(1, threadCount)):
t = threading.Thread(name = ' thread%s' % i, target = self.pow, args = (True,))
t.start()
def pow(self, reporting = False):
startTime = math.floor(time.time())
self.hashing = True
self.reporting = reporting
iFound = False # if current thread is the one that found the answer
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nonce = BLOCK_NONCE_START_INT
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while self.hashing:
self.metadata[' pow' ] = nonce
payload = json.dumps(self.metadata).encode() + b' \n' + self.data
token = hashers.sha3_hash(payload)
try:
# on some versions, token is bytes
token = token.decode()
except AttributeError:
pass
if self.puzzle == token[0:self.difficulty]:
self.hashing = False
iFound = True
self.result = payload
break
nonce += 1
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if iFound:
endTime = math.floor(time.time())
if self.reporting:
logger.debug(' Found token after %s seconds: %s' % (endTime - startTime, token), timestamp=True)
def shutdown(self):
self.hashing = False
self.puzzle = ' '
def changeDifficulty(self, newDiff):
self.difficulty = newDiff
def getResult(self):
' ' '
Returns the result then sets to false, useful to automatically clear the result
' ' '
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try:
retVal = self.result
except AttributeError:
retVal = False
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self.result = False
return retVal
def waitForResult(self):
' ' '
Returns the result only when it has been found, False if not running and not found
' ' '
result = False
try:
while True:
result = self.getResult()
if not self.hashing:
break
else:
time.sleep(1)
except KeyboardInterrupt:
self.shutdown()
logger.warn(' Got keyboard interrupt while waiting for POW result, stopping' )
return result< / code > < / pre >
< / details >
< / section >
< section >
< h2 class = "section-title" id = "header-submodules" > Sub-modules< / h2 >
< dl >
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< dt > < code class = "name" > < a title = "src.onionrproofs.blocknoncestart" href = "blocknoncestart.html" > src.onionrproofs.blocknoncestart< / a > < / code > < / dt >
< dd >
< section class = "desc" > < / section >
< / dd >
< dt > < code class = "name" > < a title = "src.onionrproofs.subprocesspow" href = "subprocesspow.html" > src.onionrproofs.subprocesspow< / a > < / code > < / dt >
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< dd >
< section class = "desc" > < p > Onionr - Private P2P Communication …< / p > < / section >
< / dd >
< / dl >
< / section >
< section >
< / section >
< section >
< h2 class = "section-title" id = "header-functions" > Functions< / h2 >
< dl >
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< dt id = "src.onionrproofs.getDifficultyForNewBlock" > < code class = "name flex" >
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< span > def < span class = "ident" > getDifficultyForNewBlock< / span > < / span > (< span > data)< / span >
< / code > < / dt >
< dd >
< section class = "desc" > < p > Get difficulty for block. Accepts size in integer, Block instance, or str/bytes full block contents< / p > < / section >
< details class = "source" >
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< summary >
< span > Expand source code< / span >
< / summary >
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< pre > < code class = "python" > def getDifficultyForNewBlock(data):
' ' '
Get difficulty for block. Accepts size in integer, Block instance, or str/bytes full block contents
' ' '
if isinstance(data, onionrblockapi.Block):
dataSizeInBytes = len(bytesconverter.str_to_bytes(data.getRaw()))
else:
dataSizeInBytes = len(bytesconverter.str_to_bytes(data))
minDifficulty = config.get(' general.minimum_send_pow' , 4)
totalDifficulty = max(minDifficulty, math.floor(dataSizeInBytes / 1000000.0)) + getDifficultyModifier()
return totalDifficulty
return retData< / code > < / pre >
< / details >
< / dd >
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< dt id = "src.onionrproofs.getDifficultyModifier" > < code class = "name flex" >
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< span > def < span class = "ident" > getDifficultyModifier< / span > < / span > (< span > )< / span >
< / code > < / dt >
< dd >
< section class = "desc" > < p > returns the difficulty modifier for block storage based
on a variety of factors, currently only disk use.< / p > < / section >
< details class = "source" >
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< summary >
< span > Expand source code< / span >
< / summary >
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< pre > < code class = "python" > def getDifficultyModifier():
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' ' ' returns the difficulty modifier for block storage based
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on a variety of factors, currently only disk use.
' ' '
percentUse = storagecounter.StorageCounter().get_percent()
difficultyIncrease = math.floor(4 * percentUse) # difficulty increase is a step function
return difficultyIncrease< / code > < / pre >
< / details >
< / dd >
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< dt id = "src.onionrproofs.getHashDifficulty" > < code class = "name flex" >
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< span > def < span class = "ident" > getHashDifficulty< / span > < / span > (< span > h)< / span >
< / code > < / dt >
< dd >
< section class = "desc" > < p > Return the amount of leading zeroes in a hex hash string (hexHash)< / p > < / section >
< details class = "source" >
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< summary >
< span > Expand source code< / span >
< / summary >
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< pre > < code class = "python" > def getHashDifficulty(h: str):
' ' '
Return the amount of leading zeroes in a hex hash string (hexHash)
' ' '
return len(h) - len(h.lstrip(' 0' ))< / code > < / pre >
< / details >
< / dd >
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< dt id = "src.onionrproofs.hashMeetsDifficulty" > < code class = "name flex" >
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< span > def < span class = "ident" > hashMeetsDifficulty< / span > < / span > (< span > hexHash)< / span >
< / code > < / dt >
< dd >
< section class = "desc" > < p > Return bool for a hash string to see if it meets pow difficulty defined in config< / p > < / section >
< details class = "source" >
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< summary >
< span > Expand source code< / span >
< / summary >
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< pre > < code class = "python" > def hashMeetsDifficulty(hexHash):
' ' '
Return bool for a hash string to see if it meets pow difficulty defined in config
' ' '
hashDifficulty = getHashDifficulty(hexHash)
try:
expected = int(config.get(' general.minimum_block_pow' ))
except TypeError:
raise ValueError(' Missing general.minimum_block_pow config' )
return hashDifficulty > = expected< / code > < / pre >
< / details >
< / dd >
< / dl >
< / section >
< section >
< h2 class = "section-title" id = "header-classes" > Classes< / h2 >
< dl >
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< dt id = "src.onionrproofs.POW" > < code class = "flex name class" >
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< span > class < span class = "ident" > POW< / span > < / span >
< span > (< / span > < span > metadata, data, threadCount=1, minDifficulty=0)< / span >
< / code > < / dt >
< dd >
< section class = "desc" > < / section >
< details class = "source" >
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< summary >
< span > Expand source code< / span >
< / summary >
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< pre > < code class = "python" > class POW:
def __init__(self, metadata, data, threadCount = 1, minDifficulty=0):
self.foundHash = False
self.difficulty = 0
self.data = data
self.metadata = metadata
self.threadCount = threadCount
self.hashing = False
json_metadata = json.dumps(metadata).encode()
try:
self.data = self.data.encode()
except AttributeError:
pass
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if minDifficulty > 0:
self.difficulty = minDifficulty
else:
# Calculate difficulty. Dumb for now, may use good algorithm in the future.
self.difficulty = getDifficultyForNewBlock(bytes(json_metadata + b' \n' + self.data))
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logger.info(' Computing POW (difficulty: %s)...' % (self.difficulty,))
self.mainHash = ' 0' * 64
self.puzzle = self.mainHash[0:min(self.difficulty, len(self.mainHash))]
for i in range(max(1, threadCount)):
t = threading.Thread(name = ' thread%s' % i, target = self.pow, args = (True,))
t.start()
def pow(self, reporting = False):
startTime = math.floor(time.time())
self.hashing = True
self.reporting = reporting
iFound = False # if current thread is the one that found the answer
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nonce = BLOCK_NONCE_START_INT
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while self.hashing:
self.metadata[' pow' ] = nonce
payload = json.dumps(self.metadata).encode() + b' \n' + self.data
token = hashers.sha3_hash(payload)
try:
# on some versions, token is bytes
token = token.decode()
except AttributeError:
pass
if self.puzzle == token[0:self.difficulty]:
self.hashing = False
iFound = True
self.result = payload
break
nonce += 1
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if iFound:
endTime = math.floor(time.time())
if self.reporting:
logger.debug(' Found token after %s seconds: %s' % (endTime - startTime, token), timestamp=True)
def shutdown(self):
self.hashing = False
self.puzzle = ' '
def changeDifficulty(self, newDiff):
self.difficulty = newDiff
def getResult(self):
' ' '
Returns the result then sets to false, useful to automatically clear the result
' ' '
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try:
retVal = self.result
except AttributeError:
retVal = False
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self.result = False
return retVal
def waitForResult(self):
' ' '
Returns the result only when it has been found, False if not running and not found
' ' '
result = False
try:
while True:
result = self.getResult()
if not self.hashing:
break
else:
time.sleep(1)
except KeyboardInterrupt:
self.shutdown()
logger.warn(' Got keyboard interrupt while waiting for POW result, stopping' )
return result< / code > < / pre >
< / details >
< h3 > Methods< / h3 >
< dl >
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< dt id = "src.onionrproofs.POW.changeDifficulty" > < code class = "name flex" >
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< span > def < span class = "ident" > changeDifficulty< / span > < / span > (< span > self, newDiff)< / span >
< / code > < / dt >
< dd >
< section class = "desc" > < / section >
< details class = "source" >
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< summary >
< span > Expand source code< / span >
< / summary >
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< pre > < code class = "python" > def changeDifficulty(self, newDiff):
self.difficulty = newDiff< / code > < / pre >
< / details >
< / dd >
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< dt id = "src.onionrproofs.POW.getResult" > < code class = "name flex" >
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< span > def < span class = "ident" > getResult< / span > < / span > (< span > self)< / span >
< / code > < / dt >
< dd >
< section class = "desc" > < p > Returns the result then sets to false, useful to automatically clear the result< / p > < / section >
< details class = "source" >
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< summary >
< span > Expand source code< / span >
< / summary >
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< pre > < code class = "python" > def getResult(self):
' ' '
Returns the result then sets to false, useful to automatically clear the result
' ' '
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try:
retVal = self.result
except AttributeError:
retVal = False
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self.result = False
return retVal< / code > < / pre >
< / details >
< / dd >
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< dt id = "src.onionrproofs.POW.pow" > < code class = "name flex" >
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< span > def < span class = "ident" > pow< / span > < / span > (< span > self, reporting=False)< / span >
< / code > < / dt >
< dd >
< section class = "desc" > < / section >
< details class = "source" >
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< summary >
< span > Expand source code< / span >
< / summary >
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< pre > < code class = "python" > def pow(self, reporting = False):
startTime = math.floor(time.time())
self.hashing = True
self.reporting = reporting
iFound = False # if current thread is the one that found the answer
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nonce = BLOCK_NONCE_START_INT
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while self.hashing:
self.metadata[' pow' ] = nonce
payload = json.dumps(self.metadata).encode() + b' \n' + self.data
token = hashers.sha3_hash(payload)
try:
# on some versions, token is bytes
token = token.decode()
except AttributeError:
pass
if self.puzzle == token[0:self.difficulty]:
self.hashing = False
iFound = True
self.result = payload
break
nonce += 1
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if iFound:
endTime = math.floor(time.time())
if self.reporting:
logger.debug(' Found token after %s seconds: %s' % (endTime - startTime, token), timestamp=True)< / code > < / pre >
< / details >
< / dd >
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< dt id = "src.onionrproofs.POW.shutdown" > < code class = "name flex" >
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< span > def < span class = "ident" > shutdown< / span > < / span > (< span > self)< / span >
< / code > < / dt >
< dd >
< section class = "desc" > < / section >
< details class = "source" >
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< summary >
< span > Expand source code< / span >
< / summary >
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< pre > < code class = "python" > def shutdown(self):
self.hashing = False
self.puzzle = ' ' < / code > < / pre >
< / details >
< / dd >
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< dt id = "src.onionrproofs.POW.waitForResult" > < code class = "name flex" >
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< span > def < span class = "ident" > waitForResult< / span > < / span > (< span > self)< / span >
< / code > < / dt >
< dd >
< section class = "desc" > < p > Returns the result only when it has been found, False if not running and not found< / p > < / section >
< details class = "source" >
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< summary >
< span > Expand source code< / span >
< / summary >
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< pre > < code class = "python" > def waitForResult(self):
' ' '
Returns the result only when it has been found, False if not running and not found
' ' '
result = False
try:
while True:
result = self.getResult()
if not self.hashing:
break
else:
time.sleep(1)
except KeyboardInterrupt:
self.shutdown()
logger.warn(' Got keyboard interrupt while waiting for POW result, stopping' )
return result< / code > < / pre >
< / details >
< / dd >
< / dl >
< / dd >
< / dl >
< / section >
< / article >
< nav id = "sidebar" >
< h1 > Index< / h1 >
< div class = "toc" >
< ul > < / ul >
< / div >
< ul id = "index" >
< li > < h3 > Super-module< / h3 >
< ul >
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< li > < code > < a title = "src" href = "../index.html" > src< / a > < / code > < / li >
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< / ul >
< / li >
< li > < h3 > < a href = "#header-submodules" > Sub-modules< / a > < / h3 >
< ul >
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< li > < code > < a title = "src.onionrproofs.blocknoncestart" href = "blocknoncestart.html" > src.onionrproofs.blocknoncestart< / a > < / code > < / li >
< li > < code > < a title = "src.onionrproofs.subprocesspow" href = "subprocesspow.html" > src.onionrproofs.subprocesspow< / a > < / code > < / li >
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< / ul >
< / li >
< li > < h3 > < a href = "#header-functions" > Functions< / a > < / h3 >
< ul class = "" >
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< li > < code > < a title = "src.onionrproofs.getDifficultyForNewBlock" href = "#src.onionrproofs.getDifficultyForNewBlock" > getDifficultyForNewBlock< / a > < / code > < / li >
< li > < code > < a title = "src.onionrproofs.getDifficultyModifier" href = "#src.onionrproofs.getDifficultyModifier" > getDifficultyModifier< / a > < / code > < / li >
< li > < code > < a title = "src.onionrproofs.getHashDifficulty" href = "#src.onionrproofs.getHashDifficulty" > getHashDifficulty< / a > < / code > < / li >
< li > < code > < a title = "src.onionrproofs.hashMeetsDifficulty" href = "#src.onionrproofs.hashMeetsDifficulty" > hashMeetsDifficulty< / a > < / code > < / li >
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< / ul >
< / li >
< li > < h3 > < a href = "#header-classes" > Classes< / a > < / h3 >
< ul >
< li >
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< h4 > < code > < a title = "src.onionrproofs.POW" href = "#src.onionrproofs.POW" > POW< / a > < / code > < / h4 >
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< ul class = "" >
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< li > < code > < a title = "src.onionrproofs.POW.changeDifficulty" href = "#src.onionrproofs.POW.changeDifficulty" > changeDifficulty< / a > < / code > < / li >
< li > < code > < a title = "src.onionrproofs.POW.getResult" href = "#src.onionrproofs.POW.getResult" > getResult< / a > < / code > < / li >
< li > < code > < a title = "src.onionrproofs.POW.pow" href = "#src.onionrproofs.POW.pow" > pow< / a > < / code > < / li >
< li > < code > < a title = "src.onionrproofs.POW.shutdown" href = "#src.onionrproofs.POW.shutdown" > shutdown< / a > < / code > < / li >
< li > < code > < a title = "src.onionrproofs.POW.waitForResult" href = "#src.onionrproofs.POW.waitForResult" > waitForResult< / a > < / code > < / li >
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< / main >
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< p > Generated by < a href = "https://pdoc3.github.io/pdoc" > < cite > pdoc< / cite > 0.7.4< / a > .< / p >
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