Uses Bitcoin-RPC to create CPFP to sweep an unconfirmed transaction output into another transaction with higher fees

0_Readme.md

Bitcointalk thread: https://bitcointalk.org/index.php?topic=1122324.0

Once you get the HEX you can manually submit to Eligius: http://eligius.st/~wizkid057/newstats/pushtxn.php

1_SweepUnconf.py

# [rights]  Copyright Dan B. (brianddk) 2015 https://github.com/brianddk
# [license] Licensed under Apache 2.0 https://www.apache.org/licenses/LICENSE-2.0
# [repo]    https://gist.github.com/brianddk/db762a50c6fa5049ff63
# [version] 0.3 
# [tips]    18MDTTiqPM8ZEo29Cig1wfGdkLNtvyorW5
from bitcoinrpc.authproxy import AuthServiceProxy, JSONRPCException
import argparse
import os
import os.path
import simplejson
import getpass
from decimal import Decimal, ROUND_DOWN

def main():
    satPcoin = 100000000
    coinPsat = 0.00000001
    minTxFee = 1000

    (rpcuser, rpcpassword, rpcbind) = parse_conf(args.conf)
    url='http://%s:%s@%s' % (rpcuser, rpcpassword, rpcbind)
    btcrpc = AuthServiceProxy(url)

    uctxo = get_uctxo(btcrpc)
    fee = (Decimal(args.txfee) / Decimal(satPcoin))
    vout = [{'txid': uctxo['txid'], 'vout': uctxo['vout']}]
    amt = uctxo['amount'] - fee
    amt = amt.quantize(Decimal(str(coinPsat)), rounding=ROUND_DOWN)
    sendto = {uctxo['address']: amt}

    print "\nFROM:"
    prettyPrint(vout)
    print "\nTO:"
    prettyPrint(sendto)
    print "\nFEE:"
    prettyPrint({'FeeInBtc': fee})

    txhex = btcrpc.createrawtransaction(vout, sendto)
    passphrase = getpass.getpass("Enter Wallet Passphrase: ")
    btcrpc.walletpassphrase(passphrase, 1)
    sigtx = btcrpc.signrawtransaction(txhex)
    btcrpc.walletlock()

    dectx = btcrpc.decoderawtransaction(sigtx['hex'])
    txlen = len(sigtx['hex'])
    feePkb = 1000 * int(args.txfee) / txlen
    print "\nTRANSACTION:"
    prettyPrint(dectx)
    print "\nHEX:\n%s" % sigtx['hex']
    print "\nLEN: %d" % txlen
    print "\nFEE / KB: %d" % feePkb

    if feePkb < minTxFee:
        print "Ohh No... The fee is too small [Err 2]"
        print "INFO: http://bitcoinexchangerate.org/fees"
        exit(2)
    if args.send:
        btcrpc.sendrawtransaction(sigtx['hex'])

def conf_default():
    appdata=os.environ["APPDATA"]
    #return os.path.join(appdata, "Bitcoin", "testnet3", "bitcoin.conf")
    return os.path.join(appdata, "Bitcoin", "bitcoin.conf")
    
def parse_args():
    parser=argparse.ArgumentParser()
    parser.add_argument("-conf", help="Bitcoin Config file to reference",
                        action="store", type=str, default=conf_default())
    parser.add_argument("-txfee", help="TXFEE in satoshi to spend",
                        action="store", type=int, default=111111)
    parser.add_argument("-uctxo", help="UCTXO index from '-list' to spend",
                        action="store", type=int, default=0)
    parser.add_argument("-debug", help="Debug run of the script",
                        action="store_true")
    parser.add_argument("-list", help="List unconf TXOs to choose from",
                        action="store_true")
    parser.add_argument("-send", help="Send the transaction",
                        action="store_true")
    return parser.parse_args()

def parse_conf(conf_file):
    conff=open(conf_file, "r")
    if args.list: print "\nCONFIGURATION:"
    for line in conff:
        line=line.strip()
        if line.startswith("#"): continue
        if args.list and len(line): print '   ',line
        if line.startswith("rpcuser="):
            rpcuser=line[len("rpcuser="):]
        if line.startswith("rpcpassword="):
            rpcpassword=line[len("rpcpassword="):]
        if line.startswith("rpcbind="):
            rpcbind=line[len("rpcbind="):]
    conff.close()
    return (rpcuser, rpcpassword, rpcbind)

def prettyPrint(obj):
    print simplejson.dumps(obj, use_decimal=True, sort_keys=True, indent=4 * ' ')
    
def get_uctxo(btcrpc):
    uctxos = []
    ustxos = btcrpc.listunspent(0)
    for ustxo in ustxos:
        if args.debug:
            if ustxo['confirmations'] == 0: continue #test
        else:
            if ustxo['confirmations'] != 0: continue #final
        uctxos += [ustxo]
        addr = ustxo['address']
        data = btcrpc.validateaddress(addr)
        if not data.get('ismine'):
            print "Ohh No... almost sent to wrong address [Err 1]"
            exit(1)

    if args.list:
        i = 0
        for uctxo in uctxos:
            print "\nUCTXO[%d]" % i
            i += 1
            prettyPrint(uctxo)
        exit()
        
    return uctxos[args.uctxo]

if __name__ == "__main__":
    args = parse_args()
    main()