b41ecc6feb
0) Adjust BIP16 & BIP30 enforcement values 1) Reduce amount that peers can adjust our time to eliminate an attack vector. Thanks to coblee for this fix. 2) Zeitgeist2 patch - thanks to Lolcust and ArtForz. This fixes an issue where a 51% attack can change difficulty at will. Go back the full period unless it's the first retarget after genesis. 3) Avoid overflow in CalculateNextWorkRequired(). Thanks to pooler for the overflow fix. 4) SegWit ContextualCheckBlockHeader adjustment and extra coverage 5) Reject peer proto version below 70002. Thanks to wtogami for this patch. 6) Adjust default settings for Litecoin
271 lines
10 KiB
Python
Executable File
271 lines
10 KiB
Python
Executable File
#!/usr/bin/env python
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# Copyright (c) 2013 The Bitcoin Core developers
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# Distributed under the MIT 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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# Use the raw transactions API to spend bitcoins received on particular addresses,
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# and send any change back to that same address.
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#
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# Example usage:
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# spendfrom.py # Lists available funds
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# spendfrom.py --from=ADDRESS --to=ADDRESS --amount=11.00
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#
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# Assumes it will talk to a bitcoind or Bitcoin-Qt running
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# on localhost.
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#
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# Depends on jsonrpc
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#
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from decimal import *
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import getpass
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import math
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import os
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import os.path
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import platform
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import sys
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import time
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from jsonrpc import ServiceProxy, json
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BASE_FEE=Decimal("0.001")
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def check_json_precision():
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"""Make sure json library being used does not lose precision converting BTC values"""
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n = Decimal("20000000.00000003")
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satoshis = int(json.loads(json.dumps(float(n)))*1.0e8)
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if satoshis != 2000000000000003:
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raise RuntimeError("JSON encode/decode loses precision")
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def determine_db_dir():
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"""Return the default location of the bitcoin data directory"""
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if platform.system() == "Darwin":
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return os.path.expanduser("~/Library/Application Support/Bitcoin/")
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elif platform.system() == "Windows":
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return os.path.join(os.environ['APPDATA'], "Bitcoin")
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return os.path.expanduser("~/.bitcoin")
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def read_bitcoin_config(dbdir):
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"""Read the bitcoin.conf file from dbdir, returns dictionary of settings"""
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from ConfigParser import SafeConfigParser
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class FakeSecHead(object):
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def __init__(self, fp):
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self.fp = fp
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self.sechead = '[all]\n'
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def readline(self):
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if self.sechead:
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try: return self.sechead
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finally: self.sechead = None
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else:
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s = self.fp.readline()
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if s.find('#') != -1:
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s = s[0:s.find('#')].strip() +"\n"
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return s
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config_parser = SafeConfigParser()
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config_parser.readfp(FakeSecHead(open(os.path.join(dbdir, "bitcoin.conf"))))
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return dict(config_parser.items("all"))
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def connect_JSON(config):
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"""Connect to a bitcoin JSON-RPC server"""
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testnet = config.get('testnet', '0')
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testnet = (int(testnet) > 0) # 0/1 in config file, convert to True/False
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if not 'rpcport' in config:
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config['rpcport'] = 19332 if testnet else 9332
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connect = "http://%s:%s@127.0.0.1:%s"%(config['rpcuser'], config['rpcpassword'], config['rpcport'])
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try:
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result = ServiceProxy(connect)
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# ServiceProxy is lazy-connect, so send an RPC command mostly to catch connection errors,
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# but also make sure the bitcoind we're talking to is/isn't testnet:
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if result.getmininginfo()['testnet'] != testnet:
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sys.stderr.write("RPC server at "+connect+" testnet setting mismatch\n")
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sys.exit(1)
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return result
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except:
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sys.stderr.write("Error connecting to RPC server at "+connect+"\n")
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sys.exit(1)
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def unlock_wallet(bitcoind):
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info = bitcoind.getinfo()
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if 'unlocked_until' not in info:
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return True # wallet is not encrypted
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t = int(info['unlocked_until'])
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if t <= time.time():
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try:
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passphrase = getpass.getpass("Wallet is locked; enter passphrase: ")
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bitcoind.walletpassphrase(passphrase, 5)
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except:
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sys.stderr.write("Wrong passphrase\n")
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info = bitcoind.getinfo()
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return int(info['unlocked_until']) > time.time()
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def list_available(bitcoind):
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address_summary = dict()
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address_to_account = dict()
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for info in bitcoind.listreceivedbyaddress(0):
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address_to_account[info["address"]] = info["account"]
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unspent = bitcoind.listunspent(0)
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for output in unspent:
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# listunspent doesn't give addresses, so:
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rawtx = bitcoind.getrawtransaction(output['txid'], 1)
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vout = rawtx["vout"][output['vout']]
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pk = vout["scriptPubKey"]
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# This code only deals with ordinary pay-to-bitcoin-address
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# or pay-to-script-hash outputs right now; anything exotic is ignored.
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if pk["type"] != "pubkeyhash" and pk["type"] != "scripthash":
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continue
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address = pk["addresses"][0]
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if address in address_summary:
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address_summary[address]["total"] += vout["value"]
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address_summary[address]["outputs"].append(output)
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else:
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address_summary[address] = {
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"total" : vout["value"],
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"outputs" : [output],
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"account" : address_to_account.get(address, "")
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}
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return address_summary
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def select_coins(needed, inputs):
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# Feel free to improve this, this is good enough for my simple needs:
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outputs = []
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have = Decimal("0.0")
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n = 0
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while have < needed and n < len(inputs):
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outputs.append({ "txid":inputs[n]["txid"], "vout":inputs[n]["vout"]})
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have += inputs[n]["amount"]
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n += 1
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return (outputs, have-needed)
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def create_tx(bitcoind, fromaddresses, toaddress, amount, fee):
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all_coins = list_available(bitcoind)
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total_available = Decimal("0.0")
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needed = amount+fee
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potential_inputs = []
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for addr in fromaddresses:
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if addr not in all_coins:
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continue
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potential_inputs.extend(all_coins[addr]["outputs"])
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total_available += all_coins[addr]["total"]
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if total_available < needed:
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sys.stderr.write("Error, only %f BTC available, need %f\n"%(total_available, needed));
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sys.exit(1)
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#
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# Note:
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# Python's json/jsonrpc modules have inconsistent support for Decimal numbers.
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# Instead of wrestling with getting json.dumps() (used by jsonrpc) to encode
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# Decimals, I'm casting amounts to float before sending them to bitcoind.
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#
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outputs = { toaddress : float(amount) }
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(inputs, change_amount) = select_coins(needed, potential_inputs)
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if change_amount > BASE_FEE: # don't bother with zero or tiny change
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change_address = fromaddresses[-1]
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if change_address in outputs:
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outputs[change_address] += float(change_amount)
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else:
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outputs[change_address] = float(change_amount)
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rawtx = bitcoind.createrawtransaction(inputs, outputs)
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signed_rawtx = bitcoind.signrawtransaction(rawtx)
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if not signed_rawtx["complete"]:
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sys.stderr.write("signrawtransaction failed\n")
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sys.exit(1)
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txdata = signed_rawtx["hex"]
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return txdata
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def compute_amount_in(bitcoind, txinfo):
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result = Decimal("0.0")
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for vin in txinfo['vin']:
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in_info = bitcoind.getrawtransaction(vin['txid'], 1)
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vout = in_info['vout'][vin['vout']]
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result = result + vout['value']
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return result
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def compute_amount_out(txinfo):
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result = Decimal("0.0")
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for vout in txinfo['vout']:
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result = result + vout['value']
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return result
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def sanity_test_fee(bitcoind, txdata_hex, max_fee):
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class FeeError(RuntimeError):
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pass
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try:
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txinfo = bitcoind.decoderawtransaction(txdata_hex)
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total_in = compute_amount_in(bitcoind, txinfo)
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total_out = compute_amount_out(txinfo)
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if total_in-total_out > max_fee:
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raise FeeError("Rejecting transaction, unreasonable fee of "+str(total_in-total_out))
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tx_size = len(txdata_hex)/2
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kb = tx_size/1000 # integer division rounds down
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if kb > 1 and fee < BASE_FEE:
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raise FeeError("Rejecting no-fee transaction, larger than 1000 bytes")
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if total_in < 0.01 and fee < BASE_FEE:
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raise FeeError("Rejecting no-fee, tiny-amount transaction")
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# Exercise for the reader: compute transaction priority, and
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# warn if this is a very-low-priority transaction
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except FeeError as err:
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sys.stderr.write((str(err)+"\n"))
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sys.exit(1)
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def main():
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import optparse
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parser = optparse.OptionParser(usage="%prog [options]")
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parser.add_option("--from", dest="fromaddresses", default=None,
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help="addresses to get bitcoins from")
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parser.add_option("--to", dest="to", default=None,
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help="address to get send bitcoins to")
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parser.add_option("--amount", dest="amount", default=None,
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help="amount to send")
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parser.add_option("--fee", dest="fee", default="0.0",
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help="fee to include")
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parser.add_option("--datadir", dest="datadir", default=determine_db_dir(),
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help="location of bitcoin.conf file with RPC username/password (default: %default)")
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parser.add_option("--testnet", dest="testnet", default=False, action="store_true",
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help="Use the test network")
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parser.add_option("--dry_run", dest="dry_run", default=False, action="store_true",
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help="Don't broadcast the transaction, just create and print the transaction data")
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(options, args) = parser.parse_args()
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check_json_precision()
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config = read_bitcoin_config(options.datadir)
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if options.testnet: config['testnet'] = True
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bitcoind = connect_JSON(config)
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if options.amount is None:
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address_summary = list_available(bitcoind)
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for address,info in address_summary.iteritems():
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n_transactions = len(info['outputs'])
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if n_transactions > 1:
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print("%s %.8f %s (%d transactions)"%(address, info['total'], info['account'], n_transactions))
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else:
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print("%s %.8f %s"%(address, info['total'], info['account']))
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else:
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fee = Decimal(options.fee)
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amount = Decimal(options.amount)
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while unlock_wallet(bitcoind) == False:
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pass # Keep asking for passphrase until they get it right
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txdata = create_tx(bitcoind, options.fromaddresses.split(","), options.to, amount, fee)
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sanity_test_fee(bitcoind, txdata, amount*Decimal("0.01"))
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if options.dry_run:
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print(txdata)
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else:
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txid = bitcoind.sendrawtransaction(txdata)
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print(txid)
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if __name__ == '__main__':
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main()
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