bsunau7
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Activity: 114
Merit: 10
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August 27, 2015, 11:11:13 AM |
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Hi, Attached is a functional single threaded python miner based on the bitcoin miner. I single threaded it and replaced the inner guts with primecoin's PoW. It was done so I could get my head around the PoW as the white paper wasn't helping much. It's mined some coins on testnet, but given it's performance I wouldn't even think of running in on prodnet! I've left the config file up to the reader. Also it doesn't use the fermat remainder as a test; it just throws the block up and lets the wallet validate (so you'll get a lot of failures with a testnet difficulty of 4.98). #!/usr/bin/python
#
# Copyright (c) 2011 The Bitcoin developers
# Distributed under the MIT/X11 software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
#
import pdb
import time
import json
import pprint
import hashlib
import struct
import re
import base64
import httplib
import sys
import gmpy2
from gmpy2 import mpz
ERR_SLEEP = 15
MAX_NONCE = 0x000effff
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 ch1_test(self,origin,l):
t1 = gmpy2.sub(origin,1)
while l:
if (gmpy2.is_prime(t1)):
t2 = gmpy2.add(t1,t1)
t1 = gmpy2.add(t2,1)
else:
break
l = l - 1
# l = 0 found a complete chain, l > 0 short chain
if(l):
return 0
else:
return 1
def ch2_test(self,origin,l):
t1 = gmpy2.add(origin,1)
while l:
if (gmpy2.is_prime(t1)):
t2 = gmpy2.add(t1,t1)
t1 = gmpy2.sub(t2,1)
else:
break
l = l - 1
# l = 0 found a complete chain, l > 0 short chain
if(l):
return 0
else:
return 1
def work(self, datastr, targetstr):
# decode work data hex string to binary
static_data = datastr.decode('hex')
# before we reverse we need to extract the target
# target is encoded in the datastr 72-75 (nBits)
target = struct.unpack(">I",static_data[72:76])[0]
print "target: ", target/16777216.0
tar_len = target/16777216
# now flip data
static_data = bufreverse(static_data)
# the first 76b of 80b do not change
blk_hdr = static_data[:76]
# 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()
# convert binary hash to 256-bit Python long
hash = bufreverse(hash)
hash = wordreverse(hash)
hash_str = hash.encode('hex')
l = long(hash_str, 16)
mpz_l = mpz(l)
# high bit set?
if l < 1<<255:
continue
# Origin cannot be a prime, perform a quick odd/even test
if l & 0x01:
continue
# Chain length 4 needs mod 3 and mod 5 need to be zero. So mod 15 == 0
if((l % 15)):
continue
# do fermat (and trial division) test on chain, must not be prime!
if (gmpy2.is_prime(mpz_l)):
continue
#pdb.set_trace()
# Multiply by a number, pick one...
#origin = gmpy2.mul(mpz_l,510510)
#origin = gmpy2.mul(mpz_l,2310)
origin = gmpy2.mul(mpz_l,1)
# chain length 4. mod 7 ;0 = bi; 1,2,4 = neg, 3,5,6 = pos
m7 = l % 7
if(m7 == 0):
# test both chains
if (self.ch1_test(origin,tar_len) or self.ch2_test(origin,tar_len)):
print "origin passed +-@%d" % (nonce,)
# just submit
print time.asctime(), "PROOF-OF-WORK found: %064x" % (l,)
return (nonce + 1, nonce_bin)
elif((m7 == 1) or (m7 == 2) or (m7 == 4)):
# negative
if (self.ch2_test(origin,tar_len)):
print "origin passed -@%d" % (nonce,)
# just submit
print time.asctime(), "PROOF-OF-WORK found: %064x" % (l,)
return (nonce + 1, nonce_bin)
else:
# positive
if (self.ch1_test(origin,tar_len)):
print "origin passed +@%d" % (nonce,)
# just submit
print time.asctime(), "PROOF-OF-WORK found: %064x" % (l,)
return (nonce + 1, nonce_bin)
# loop for a new nonce
pass
return (nonce + 1, None)
def submit_work(self, rpc, original_data, nonce_bin):
nonce_bin = bufreverse(nonce_bin)
nonce = nonce_bin.encode('hex')
# 510510
#solution = original_data[:152] + nonce + "07CA2E03" + original_data[168:256]
# 2310
#solution = original_data[:152] + nonce + "00090602" + original_data[168:256]
# 1
solution = original_data[:152] + nonce + "00000101" + original_data[168:256]
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 > 0xffff0000L:
self.max_nonce = 0xffff0000L
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'] = 9914
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'])
print time.asctime(), "Miner Starts - %s:%s" % (settings['host'], settings['port'])
# Single thread as the python debugger is even yuckier if you use them
miner_thread(1)
print time.asctime(), "Miner Stops - %s:%s" % (settings['host'], settings['port'])
Regards, -- bsunau7 |
