diff options
| -rw-r--r-- | contrib/pyminer/README | 6 | ||||
| -rw-r--r-- | contrib/pyminer/example-config.cfg | 32 | ||||
| -rwxr-xr-x | contrib/pyminer/pyminer.py | 252 |
3 files changed, 290 insertions, 0 deletions
diff --git a/contrib/pyminer/README b/contrib/pyminer/README new file mode 100644 index 0000000000..d1596575dd --- /dev/null +++ b/contrib/pyminer/README @@ -0,0 +1,6 @@ + +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. + diff --git a/contrib/pyminer/example-config.cfg b/contrib/pyminer/example-config.cfg new file mode 100644 index 0000000000..103e7c1372 --- /dev/null +++ b/contrib/pyminer/example-config.cfg @@ -0,0 +1,32 @@ + +# +# RPC login details +# +host=127.0.0.1 +port=8332 + +rpcuser=myusername +rpcpass=mypass + + +# +# mining details +# + +threads=4 + +# periodic rate for requesting new work, if solution not found +scantime=60 + + +# +# misc. +# + +# not really used right now +logdir=/tmp/pyminer + +# set to 1, to enable hashmeter output +hashmeter=0 + + diff --git a/contrib/pyminer/pyminer.py b/contrib/pyminer/pyminer.py new file mode 100755 index 0000000000..2887aba591 --- /dev/null +++ b/contrib/pyminer/pyminer.py @@ -0,0 +1,252 @@ +#!/usr/bin/python +# +# Copyright (c) 2011 The Bitcoin developers +# Distributed under the MIT/X11 software license, see the accompanying +# file license.txt or http://www.opensource.org/licenses/mit-license.php. +# + +import time +import json +import pprint +import hashlib +import struct +import re +import base64 +import httplib +import sys +from multiprocessing import Process + +ERR_SLEEP = 15 +MAX_NONCE = 1000000L + +settings = {} +pp = pprint.PrettyPrinter(indent=4) + +class BitcoinRPC: + OBJID = 1 + + def __init__(self, host, port, username, password): + authpair = "%s:%s" % (username, password) + self.authhdr = "Basic %s" % (base64.b64encode(authpair)) + self.conn = httplib.HTTPConnection(host, port, False, 30) + def rpc(self, method, params=None): + self.OBJID += 1 + obj = { 'version' : '1.1', + 'method' : method, + 'id' : self.OBJID } + if params is None: + obj['params'] = [] + else: + obj['params'] = params + self.conn.request('POST', '/', json.dumps(obj), + { 'Authorization' : self.authhdr, + 'Content-type' : 'application/json' }) + + resp = self.conn.getresponse() + if resp is None: + print "JSON-RPC: no response" + return None + + body = resp.read() + resp_obj = json.loads(body) + if resp_obj is None: + print "JSON-RPC: cannot JSON-decode body" + return None + if 'error' in resp_obj and resp_obj['error'] != None: + return resp_obj['error'] + if 'result' not in resp_obj: + print "JSON-RPC: no result in object" + return None + + return resp_obj['result'] + def getblockcount(self): + return self.rpc('getblockcount') + def getwork(self, data=None): + return self.rpc('getwork', data) + +def uint32(x): + return x & 0xffffffffL + +def bytereverse(x): + return uint32(( ((x) << 24) | (((x) << 8) & 0x00ff0000) | + (((x) >> 8) & 0x0000ff00) | ((x) >> 24) )) + +def bufreverse(in_buf): + out_words = [] + for i in range(0, len(in_buf), 4): + word = struct.unpack('@I', in_buf[i:i+4])[0] + out_words.append(struct.pack('@I', bytereverse(word))) + return ''.join(out_words) + +def wordreverse(in_buf): + out_words = [] + for i in range(0, len(in_buf), 4): + out_words.append(in_buf[i:i+4]) + out_words.reverse() + return ''.join(out_words) + +class Miner: + def __init__(self, id): + self.id = id + self.max_nonce = MAX_NONCE + + def work(self, datastr, targetstr): + # decode work data hex string to binary + static_data = datastr.decode('hex') + static_data = bufreverse(static_data) + + # the first 76b of 80b do not change + blk_hdr = static_data[:76] + + # decode 256-bit target value + targetbin = targetstr.decode('hex') + targetbin = targetbin[::-1] # byte-swap and dword-swap + targetbin_str = targetbin.encode('hex') + target = long(targetbin_str, 16) + + # pre-hash first 76b of block header + static_hash = hashlib.sha256() + static_hash.update(blk_hdr) + + for nonce in xrange(self.max_nonce): + + # encode 32-bit nonce value + nonce_bin = struct.pack("<I", nonce) + + # hash final 4b, the nonce value + hash1_o = static_hash.copy() + hash1_o.update(nonce_bin) + hash1 = hash1_o.digest() + + # sha256 hash of sha256 hash + hash_o = hashlib.sha256() + hash_o.update(hash1) + hash = hash_o.digest() + + # quick test for winning solution: high 32 bits zero? + if hash[-4:] != '\0\0\0\0': + continue + + # convert binary hash to 256-bit Python long + hash = bufreverse(hash) + hash = wordreverse(hash) + + hash_str = hash.encode('hex') + l = long(hash_str, 16) + + # proof-of-work test: hash < target + if l < target: + print time.asctime(), "PROOF-OF-WORK found: %064x" % (l,) + return (nonce + 1, nonce_bin) + else: + print time.asctime(), "PROOF-OF-WORK false positive %064x" % (l,) +# return (nonce + 1, nonce_bin) + + return (nonce + 1, None) + + def submit_work(self, rpc, original_data, nonce_bin): + nonce_bin = bufreverse(nonce_bin) + nonce = nonce_bin.encode('hex') + solution = original_data[:152] + nonce + original_data[160:256] + param_arr = [ solution ] + result = rpc.getwork(param_arr) + print time.asctime(), "--> Upstream RPC result:", result + + def iterate(self, rpc): + work = rpc.getwork() + if work is None: + time.sleep(ERR_SLEEP) + return + if 'data' not in work or 'target' not in work: + time.sleep(ERR_SLEEP) + return + + time_start = time.time() + + (hashes_done, nonce_bin) = self.work(work['data'], + work['target']) + + time_end = time.time() + time_diff = time_end - time_start + + self.max_nonce = long( + (hashes_done * settings['scantime']) / time_diff) + if self.max_nonce > 0xfffffffaL: + self.max_nonce = 0xfffffffaL + + if settings['hashmeter']: + print "HashMeter(%d): %d hashes, %.2f Khash/sec" % ( + self.id, hashes_done, + (hashes_done / 1000.0) / time_diff) + + if nonce_bin is not None: + self.submit_work(rpc, work['data'], nonce_bin) + + def loop(self): + rpc = BitcoinRPC(settings['host'], settings['port'], + settings['rpcuser'], settings['rpcpass']) + if rpc is None: + return + + while True: + self.iterate(rpc) + +def miner_thread(id): + miner = Miner(id) + miner.loop() + +if __name__ == '__main__': + if len(sys.argv) != 2: + print "Usage: pyminer.py CONFIG-FILE" + sys.exit(1) + + f = open(sys.argv[1]) + for line in f: + # skip comment lines + m = re.search('^\s*#', line) + if m: + continue + + # parse key=value lines + m = re.search('^(\w+)\s*=\s*(\S.*)$', line) + if m is None: + continue + settings[m.group(1)] = m.group(2) + f.close() + + if 'host' not in settings: + settings['host'] = '127.0.0.1' + if 'port' not in settings: + settings['port'] = 8332 + if 'threads' not in settings: + settings['threads'] = 1 + if 'hashmeter' not in settings: + settings['hashmeter'] = 0 + if 'scantime' not in settings: + settings['scantime'] = 30L + if 'rpcuser' not in settings or 'rpcpass' not in settings: + print "Missing username and/or password in cfg file" + sys.exit(1) + + settings['port'] = int(settings['port']) + settings['threads'] = int(settings['threads']) + settings['hashmeter'] = int(settings['hashmeter']) + settings['scantime'] = long(settings['scantime']) + + thr_list = [] + for thr_id in range(settings['threads']): + p = Process(target=miner_thread, args=(thr_id,)) + p.start() + thr_list.append(p) + time.sleep(1) # stagger threads + + print settings['threads'], "mining threads started" + + print time.asctime(), "Miner Starts - %s:%s" % (settings['host'], settings['port']) + try: + for thr_proc in thr_list: + thr_proc.join() + except KeyboardInterrupt: + pass + print time.asctime(), "Miner Stops - %s:%s" % (settings['host'], settings['port']) + |