mirror of https://github.com/bitcoin/bitcoin
pull/4603/head
Jeff Garzik
10 years ago
commit
b45e782071
@ -1,8 +0,0 @@
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### PyMiner ###
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This is a 'getwork' CPU mining client for Bitcoin. It is pure-python, and therefore very, very slow. The purpose is to provide a reference implementation of a miner, for study.
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### Other Resources ###
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- [BitcoinTalk Thread](https://bitcointalk.org/index.php?topic=3546.0)
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- [Jgarzik Repo](https://github.com/jgarzik/pyminer)
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@ -1,32 +0,0 @@
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#
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# RPC login details
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#
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host=127.0.0.1
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port=8332
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rpcuser=myusername
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rpcpass=mypass
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#
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# mining details
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#
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threads=4
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# periodic rate for requesting new work, if solution not found
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scantime=60
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#
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# misc.
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#
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# not really used right now
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logdir=/tmp/pyminer
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# set to 1, to enable hashmeter output
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hashmeter=0
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@ -1,269 +0,0 @@
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#!/usr/bin/python
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#
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# Copyright (c) 2011 The Bitcoin developers
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# Distributed under the MIT/X11 software license, see the accompanying
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# file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#
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import sys
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from multiprocessing import Process
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import time
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import struct
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import hashlib
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import base64
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import re
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import httplib
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import json
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ERR_SLEEP = 15
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MAX_NONCE = 1000000L
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settings = {}
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class BitcoinRPC:
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object_id = 1
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def __init__(self, host, port, username, password):
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authpair = "{0}:{1}".format(username, password)
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self.authhdr = "Basic {0}".format(base64.b64encode(authpair))
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self.conn = httplib.HTTPConnection(host, port, strict=False, timeout=30)
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def rpc(self, method, params=None):
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self.object_id += 1
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obj = {'version' : '1.1',
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'method' : method,
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'id' : self.object_id,
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'params' : params or []}
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self.conn.request('POST', '/', json.dumps(obj),
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{ 'Authorization' : self.authhdr,
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'Content-type' : 'application/json' })
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resp = self.conn.getresponse()
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if resp is None:
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print("JSON-RPC: no response")
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return None
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body = resp.read()
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resp_obj = json.loads(body)
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if resp_obj is None:
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print("JSON-RPC: cannot JSON-decode body")
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return None
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if 'error' in resp_obj and resp_obj['error'] != None:
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return resp_obj['error']
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if 'result' not in resp_obj:
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print("JSON-RPC: no result in object")
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return None
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return resp_obj['result']
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def getblockcount(self):
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return self.rpc('getblockcount')
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def getwork(self, data=None):
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return self.rpc('getwork', data)
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def uint32(x):
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return x & 0xffffffffL
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def bytereverse(x):
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return uint32(( ((x) << 24) | (((x) << 8) & 0x00ff0000) |
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(((x) >> 8) & 0x0000ff00) | ((x) >> 24) ))
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def bufreverse(in_buf):
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out_words = []
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for i in range(0, len(in_buf), 4):
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word = struct.unpack('@I', in_buf[i:i+4])[0]
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out_words.append(struct.pack('@I', bytereverse(word)))
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return ''.join(out_words)
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def wordreverse(in_buf):
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out_words = []
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for i in range(0, len(in_buf), 4):
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out_words.append(in_buf[i:i+4])
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out_words.reverse()
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return ''.join(out_words)
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class Miner:
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def __init__(self, id):
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self.id = id
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self.max_nonce = MAX_NONCE
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def work(self, datastr, targetstr):
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# decode work data hex string to binary
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static_data = datastr.decode('hex')
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static_data = bufreverse(static_data)
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# the first 76b of 80b do not change
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blk_hdr = static_data[:76]
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# decode 256-bit target value
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targetbin = targetstr.decode('hex')
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targetbin = targetbin[::-1] # byte-swap and dword-swap
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targetbin_str = targetbin.encode('hex')
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target = long(targetbin_str, 16)
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# pre-hash first 76b of block header
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static_hash = hashlib.sha256()
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static_hash.update(blk_hdr)
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for nonce in xrange(self.max_nonce):
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# encode 32-bit nonce value
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nonce_bin = struct.pack("<I", nonce)
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# hash final 4b, the nonce value
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hash1_o = static_hash.copy()
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hash1_o.update(nonce_bin)
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hash1 = hash1_o.digest()
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# sha256 hash of sha256 hash
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hash_o = hashlib.sha256()
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hash_o.update(hash1)
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hash = hash_o.digest()
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# quick test for winning solution: high 32 bits zero?
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if hash[-4:] != '\0\0\0\0':
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continue
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# convert binary hash to 256-bit Python long
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hash = bufreverse(hash)
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hash = wordreverse(hash)
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hash_str = hash.encode('hex')
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long_hash = long(hash_str, 16)
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# proof-of-work test: hash < target
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if long_hash < target:
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print(time.asctime(), "PROOF-OF-WORK found: "
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"{0:064x}".format(long_hash))
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return (nonce + 1, nonce_bin)
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else:
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print(time.asctime(), "PROOF-OF-WORK false"
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"positive {0:064x}".format(long_hash))
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return (nonce + 1, None)
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def submit_work(self, rpc, original_data, nonce_bin):
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nonce_bin = bufreverse(nonce_bin)
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nonce = nonce_bin.encode('hex')
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solution = original_data[:152] + nonce + original_data[160:256]
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param_arr = [ solution ]
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result = rpc.getwork(param_arr)
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print(time.asctime(), "--> Upstream RPC result:", result)
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def iterate(self, rpc):
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work = rpc.getwork()
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if work is None:
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time.sleep(ERR_SLEEP)
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return
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if 'data' not in work or 'target' not in work:
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time.sleep(ERR_SLEEP)
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return
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time_start = time.time()
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(hashes_done, nonce_bin) = self.work(work['data'],
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work['target'])
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time_end = time.time()
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time_diff = time_end - time_start
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self.max_nonce = long(
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(hashes_done * settings['scantime']) / time_diff)
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if self.max_nonce > 0xfffffffaL:
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self.max_nonce = 0xfffffffaL
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if settings['hashmeter']:
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print("HashMeter({:d}): {:d} hashes, {:.2f} Khash/sec".format(
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self.id, hashes_done, (hashes_done / 1000.0) / time_diff))
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if nonce_bin is not None:
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self.submit_work(rpc, work['data'], nonce_bin)
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def loop(self):
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rpc = BitcoinRPC(settings['host'], settings['port'],
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settings['rpcuser'], settings['rpcpass'])
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if rpc is not None:
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while True:
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self.iterate(rpc)
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self.conn.close()
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def miner_thread(id):
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miner = Miner(id)
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miner.loop()
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if __name__ == '__main__':
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if len(sys.argv) != 2:
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print("Usage: pyminer.py CONFIG-FILE")
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sys.exit(1)
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with open(sys.argv[1]) as f:
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for line in f:
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# skip comment lines
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m = re.search('^\s*#', line)
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if m:
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continue
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# parse key=value lines
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m = re.search('^(\w+)\s*=\s*(\S.*)$', line)
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if m is None:
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continue
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settings[m.group(1)] = m.group(2)
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settings.setdefault('host', '127.0.0.1')
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settings.setdefault('port', 8332)
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settings.setdefault('threads', 1)
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settings.setdefault('hashmeter', 0)
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settings.setdefault('scantime', 30L)
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if 'rpcuser' not in settings or 'rpcpass' not in settings:
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print("Missing username and/or password in cfg file")
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sys.exit(1)
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settings['port'] = int(settings['port'])
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settings['threads'] = int(settings['threads'])
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settings['hashmeter'] = int(settings['hashmeter'])
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settings['scantime'] = long(settings['scantime'])
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thread_list = []
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for thread_id in range(settings['threads']):
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p = Process(target=miner_thread, args=(thread_id,))
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p.start()
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thread_list.append(p)
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time.sleep(1) # stagger threads
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print(settings['threads'], "mining threads started")
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print(time.asctime(), "Miner Starts - {0}:{1}".format(settings['host'],
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settings['port']))
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try:
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for thread_process in thread_list:
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thread_process.join()
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except KeyboardInterrupt:
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pass
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print(time.asctime(), "Miner Stops - {0}:{1}".format(settings['host'],
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settings['port']))
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