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Host-customized fork of https://github.com/tecnovert/basicswap/
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basicswap_miserver/basicswap/basicswap.py

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# -*- coding: utf-8 -*-
# Copyright (c) 2019 tecnovert
# Distributed under the MIT software license, see the accompanying
# file LICENSE.txt or http://www.opensource.org/licenses/mit-license.php.
import os
import re
import time
import datetime as dt
import zmq
import threading
import traceback
import hashlib
import subprocess
import logging
import sqlalchemy as sa
from sqlalchemy.orm import sessionmaker, scoped_session
from enum import IntEnum, auto
from . import __version__
from .util import (
COIN,
callrpc,
pubkeyToAddress,
format8,
encodeAddress,
decodeAddress,
SerialiseNum,
DeserialiseNum,
decodeWif,
toWIF,
getKeyID,
)
from .chainparams import (
chainparams,
Coins,
)
from .messages_pb2 import (
OfferMessage,
BidMessage,
BidAcceptMessage,
)
from .db import (
CURRENT_DB_VERSION,
Base,
DBKVInt,
DBKVString,
Offer,
Bid,
SwapTx,
PooledAddress,
SentOffer,
SmsgAddress,
)
import basicswap.config as cfg
import basicswap.segwit_addr as segwit_addr
DEBUG = True
SMSG_SECONDS_IN_DAY = 86400
MIN_OFFER_VALID_TIME = 60 * 10
MAX_OFFER_VALID_TIME = 60 * 60 * 48
MIN_BID_VALID_TIME = 60 * 10
MAX_BID_VALID_TIME = 60 * 60 * 48
class MessageTypes(IntEnum):
OFFER = auto()
BID = auto()
BID_ACCEPT = auto()
class SwapTypes(IntEnum):
SELLER_FIRST = auto()
BUYER_FIRST = auto()
class OfferStates(IntEnum):
OFFER_SENT = auto()
OFFER_RECEIVED = auto()
OFFER_ABANDONED = auto()
class BidStates(IntEnum):
BID_SENT = auto()
BID_RECEIVED = auto()
BID_ACCEPTED = auto() # BidAcceptMessage received/sent
SWAP_INITIATED = auto() # Initiate txn validated
SWAP_PARTICIPATING = auto() # Participate txn validated
SWAP_COMPLETED = auto() # All swap txns spent
SWAP_TIMEDOUT = auto()
BID_ABANDONED = auto() # Bid will no longer be processed
BID_ERROR = auto() # An error occurred
class TxStates(IntEnum):
TX_NONE = auto()
TX_SENT = auto()
TX_CONFIRMED = auto()
TX_REDEEMED = auto()
TX_REFUNDED = auto()
class OpCodes(IntEnum):
OP_0 = 0x00,
OP_PUSHDATA1 = 0x4c,
OP_1 = 0x51,
OP_IF = 0x63,
OP_ELSE = 0x67,
OP_ENDIF = 0x68,
OP_DROP = 0x75,
OP_DUP = 0x76,
OP_SIZE = 0x82,
OP_EQUAL = 0x87,
OP_EQUALVERIFY = 0x88,
OP_SHA256 = 0xa8,
OP_HASH160 = 0xa9,
OP_CHECKSIG = 0xac,
OP_CHECKLOCKTIMEVERIFY = 0xb1,
OP_CHECKSEQUENCEVERIFY = 0xb2,
class TxTypes(IntEnum):
ITX = auto()
PTX = auto()
ITX_REDEEM = auto()
ITX_REFUND = auto()
PTX_REDEEM = auto()
PTX_REFUND = auto()
SEQUENCE_LOCK_BLOCKS = 1
SEQUENCE_LOCK_TIME = 2
ABS_LOCK_BLOCKS = 3
ABS_LOCK_TIME = 4
SEQUENCE_LOCKTIME_GRANULARITY = 9 # 512 seconds
SEQUENCE_LOCKTIME_TYPE_FLAG = (1 << 22)
SEQUENCE_LOCKTIME_MASK = 0x0000ffff
INITIATE_TX_TIMEOUT = 40 * 60 # TODO: make variable per coin
def strOfferState(state):
if state == OfferStates.OFFER_SENT:
return 'Sent'
if state == OfferStates.OFFER_RECEIVED:
return 'Received'
if state == OfferStates.OFFER_ABANDONED:
return 'Abandoned'
return 'Unknown'
def strBidState(state):
if state == BidStates.BID_SENT:
return 'Sent'
if state == BidStates.BID_RECEIVED:
return 'Received'
if state == BidStates.BID_ACCEPTED:
return 'Accepted'
if state == BidStates.SWAP_INITIATED:
return 'Initiated'
if state == BidStates.SWAP_PARTICIPATING:
return 'Participating'
if state == BidStates.SWAP_COMPLETED:
return 'Completed'
if state == BidStates.SWAP_TIMEDOUT:
return 'Timed-out'
if state == BidStates.BID_ABANDONED:
return 'Abandoned'
if state == BidStates.BID_ERROR:
return 'Error'
return 'Unknown'
def strTxState(state):
if state == TxStates.TX_NONE:
return 'None'
if state == TxStates.TX_SENT:
return 'Sent'
if state == TxStates.TX_CONFIRMED:
return 'Confirmed'
if state == TxStates.TX_REDEEMED:
return 'Redeemed'
if state == TxStates.TX_REFUNDED:
return 'Refunded'
return 'Unknown'
def getLockName(lock_type):
if lock_type == SEQUENCE_LOCK_BLOCKS:
return 'Sequence lock, blocks'
if lock_type == SEQUENCE_LOCK_TIME:
return 'Sequence lock, time'
if lock_type == ABS_LOCK_BLOCKS:
return 'blocks'
if lock_type == ABS_LOCK_TIME:
return 'time'
def getExpectedSequence(lockType, lockVal, coin_type):
assert(lockVal >= 1), 'Bad lockVal'
if lockType == SEQUENCE_LOCK_BLOCKS:
return lockVal
if lockType == SEQUENCE_LOCK_TIME:
secondsLocked = lockVal
# Ensure the locked time is never less than lockVal
if secondsLocked % (1 << SEQUENCE_LOCKTIME_GRANULARITY) != 0:
secondsLocked += (1 << SEQUENCE_LOCKTIME_GRANULARITY)
secondsLocked >>= SEQUENCE_LOCKTIME_GRANULARITY
return secondsLocked | SEQUENCE_LOCKTIME_TYPE_FLAG
raise ValueError('Unknown lock type')
def decodeSequence(lock_value):
# Return the raw value
if lock_value & SEQUENCE_LOCKTIME_TYPE_FLAG:
return (lock_value & SEQUENCE_LOCKTIME_MASK) << SEQUENCE_LOCKTIME_GRANULARITY
return lock_value & SEQUENCE_LOCKTIME_MASK
def buildContractScript(lock_val, secret_hash, pkh_redeem, pkh_refund, op_lock=OpCodes.OP_CHECKSEQUENCEVERIFY):
script = bytearray([
OpCodes.OP_IF,
OpCodes.OP_SIZE,
0x01, 0x20, # 32
OpCodes.OP_EQUALVERIFY,
OpCodes.OP_SHA256,
0x20]) \
+ secret_hash \
+ bytearray([
OpCodes.OP_EQUALVERIFY,
OpCodes.OP_DUP,
OpCodes.OP_HASH160,
0x14]) \
+ pkh_redeem \
+ bytearray([OpCodes.OP_ELSE, ]) \
+ SerialiseNum(lock_val) \
+ bytearray([
op_lock,
OpCodes.OP_DROP,
OpCodes.OP_DUP,
OpCodes.OP_HASH160,
0x14]) \
+ pkh_refund \
+ bytearray([
OpCodes.OP_ENDIF,
OpCodes.OP_EQUALVERIFY,
OpCodes.OP_CHECKSIG])
return script
def extractScriptSecretHash(script):
return script[7:39]
def getVoutByAddress(txjs, p2sh):
for o in txjs['vout']:
try:
if p2sh in o['scriptPubKey']['addresses']:
return o['n']
except Exception:
pass
raise ValueError('Address output not found in txn')
def getVoutByP2WSH(txjs, p2wsh_hex):
for o in txjs['vout']:
try:
if p2wsh_hex == o['scriptPubKey']['hex']:
return o['n']
except Exception:
pass
raise ValueError('P2WSH output not found in txn')
def getP2SHScriptForHash(p2sh):
return bytearray([OpCodes.OP_HASH160, 0x14]) \
+ p2sh \
+ bytearray([OpCodes.OP_EQUAL])
def getP2WSH(script):
return bytearray([OpCodes.OP_0, 0x20]) + hashlib.sha256(script).digest()
def replaceAddrPrefix(addr, coin_type, chain_name, addr_type='pubkey_address'):
return encodeAddress(bytes((chainparams[coin_type][chain_name][addr_type],)) + decodeAddress(addr)[1:])
class BasicSwap():
def __init__(self, fp, data_dir, settings, chain, log_name='BasicSwap'):
self.log_name = log_name
self.fp = fp
self.is_running = True
self.fail_code = 0
self.data_dir = data_dir
self.chain = chain
self.settings = settings
# Encode key to match network
wif_prefix = chainparams[Coins.PART][self.chain]['key_prefix']
self.network_key = toWIF(wif_prefix, decodeWif(self.settings['network_key']))
self.network_pubkey = self.settings['network_pubkey']
self.network_addr = pubkeyToAddress(chainparams[Coins.PART][self.chain]['pubkey_address'], bytearray.fromhex(self.network_pubkey))
self.wallet = self.settings.get('wallet', None) # TODO: Move to coin_clients
self.last_expired = 0
self.debug = self.settings.get('debug', DEBUG)
self.coin_clients = {}
self.prepareLogging()
self.sqlite_file = os.path.join(self.data_dir, 'db.sqlite')
db_exists = os.path.exists(self.sqlite_file)
self.engine = sa.create_engine('sqlite:///' + self.sqlite_file)
if not db_exists:
Base.metadata.create_all(self.engine)
self.session_factory = sessionmaker(bind=self.engine, expire_on_commit=False)
session = scoped_session(self.session_factory)
try:
self.db_version = session.query(DBKVInt).filter_by(key='db_version').first().value
except Exception:
self.log.info('First run')
self.db_version = CURRENT_DB_VERSION
session.add(DBKVInt(
key='db_version',
value=self.db_version
))
session.commit()
try:
self._contract_count = session.query(DBKVInt).filter_by(key='contract_count').first().value
except Exception:
self._contract_count = 0
session.close()
session.remove()
self.zmqContext = zmq.Context()
self.zmqSubscriber = self.zmqContext.socket(zmq.SUB)
self.zmqSubscriber.connect(self.settings['zmqhost'] + ':' + str(self.settings['zmqport']))
self.zmqSubscriber.setsockopt_string(zmq.SUBSCRIBE, 'smsg')
# Defaults
self.coin_clients = {}
for c in Coins:
self.coin_clients[c] = self.setDefaultConnectParams(c)
if self.chain == 'regtest':
SMSG_SECONDS_IN_DAY = 600
self.swaps_in_progress = dict()
self.check_progress_seconds = self.settings.get('check_progress_seconds', 60)
self.check_watched_seconds = self.settings.get('check_watched_seconds', 60)
self.check_expired_seconds = self.settings.get('check_expired_seconds', 60 * 5)
self.last_checked_progress = 0
self.last_checked_watched = 0
self.last_checked_expired = 0
self.mxDB = threading.RLock()
self.bidcount = 0
def prepareLogging(self):
self.log = logging.getLogger(self.log_name)
self.log.propagate = False
formatter = logging.Formatter('%(asctime)s %(levelname)s : %(message)s')
stream_stdout = logging.StreamHandler()
if self.log_name != 'BasicSwap':
stream_stdout.setFormatter(logging.Formatter('%(asctime)s %(name)s %(levelname)s : %(message)s'))
else:
stream_stdout.setFormatter(formatter)
stream_fp = logging.StreamHandler(self.fp)
stream_fp.setFormatter(formatter)
self.log.setLevel(logging.DEBUG if self.debug else logging.INFO)
self.log.addHandler(stream_fp)
self.log.addHandler(stream_stdout)
def getChainClientSettings(self, coin):
try:
return self.settings['chainclients'][chainparams[coin]['name']]
except Exception:
return {}
def setDefaultConnectParams(self, coin):
chain_client_settings = self.getChainClientSettings(coin)
bindir = os.path.expanduser(chain_client_settings.get('bindir', ''))
datadir = os.path.expanduser(chain_client_settings.get('datadir', os.path.join(cfg.DATADIRS, chainparams[coin]['name'])))
connection_type = chain_client_settings.get('connection_type', 'none')
rpcauth = None
if connection_type == 'rpc':
if 'rpcauth' in chain_client_settings:
rpcauth = chain_client_settings['rpcauth']
elif 'rpcpassword' in chain_client_settings:
rpcauth = chain_client_settings['rpcuser'] + ':' + chain_client_settings['rpcpassword']
if rpcauth is None:
if self.chain == 'mainnet':
testnet_name = ''
else:
testnet_name = chainparams[coin][self.chain].get('name', self.chain)
authcookiepath = os.path.join(datadir, testnet_name, '.cookie')
# Wait for daemon to start
for i in range(10):
if not os.path.exists(authcookiepath):
time.sleep(0.5)
try:
with open(authcookiepath, 'rb') as fp:
rpcauth = fp.read().decode('utf-8')
except Exception:
self.log.warning('Unable to read authcookie for %s, %s', str(coin), authcookiepath)
session = scoped_session(self.session_factory)
try:
last_height_checked = session.query(DBKVInt).filter_by(key='last_height_checked_' + chainparams[coin]['name']).first().value
except Exception:
last_height_checked = 0
session.close()
session.remove()
return {
'coin': coin,
'connection_type': connection_type,
'bindir': bindir,
'datadir': datadir,
'rpcport': chain_client_settings.get('rpcport', chainparams[coin][self.chain]['rpcport']),
'rpcauth': rpcauth,
'blocks_confirmed': chain_client_settings.get('blocks_confirmed', 6),
'conf_target': chain_client_settings.get('conf_target', 2),
'watched_outputs': [],
'last_height_checked': last_height_checked,
'use_segwit': chain_client_settings.get('use_segwit', False),
'use_csv': chain_client_settings.get('use_csv', True),
}
def start(self):
self.log.info('Starting BasicSwap %s\n\n', __version__)
self.log.info('sqlalchemy version %s', sa.__version__)
self.upgradeDatabase(self.db_version)
for c in Coins:
if self.coin_clients[c]['connection_type'] == 'rpc':
self.waitForDaemonRPC(c)
core_version = self.callcoinrpc(c, 'getnetworkinfo')['version']
self.log.info('%s Core version %d', chainparams[c]['name'].capitalize(), core_version)
self.initialise()
def stopRunning(self, with_code=0):
self.fail_code = with_code
self.is_running = False
def upgradeDatabase(self, db_version):
if db_version >= CURRENT_DB_VERSION:
return
self.log.info('Upgrading Database from version %d to %d.', db_version, CURRENT_DB_VERSION)
raise ValueError('Scripted database upgrade not found.')
def waitForDaemonRPC(self, coin_type):
for i in range(21):
if not self.is_running:
return
try:
self.callcoinrpc(coin_type, 'getwalletinfo', [], self.wallet)
return
except Exception as ex:
self.log.warning('Can\'t connect to %s RPC: %s. Trying again in %d second/s.', coin_type, str(ex), (1 + i))
time.sleep(1 + i)
self.log.error('Can\'t connect to %s RPC, exiting.', coin_type)
self.stopRunning(1) # systemd will try restart if fail_code != 0
def setIntKV(self, str_key, int_val):
session = scoped_session(self.session_factory)
kv = session.query(DBKVInt).filter_by(key=str_key).first()
if not kv:
kv = DBKVInt(key=str_key, value=int_val)
session.add(kv)
session.commit()
session.close()
session.remove()
def loadFromDB(self):
self.log.info('Loading data from db')
self.mxDB.acquire()
try:
session = scoped_session(self.session_factory)
for bid in session.query(Bid):
if bid.state and bid.state > BidStates.BID_RECEIVED and bid.state < BidStates.SWAP_COMPLETED:
self.log.debug('Loading active bid %s', bid.bid_id.hex())
offer = session.query(Offer).filter_by(offer_id=bid.offer_id).first()
assert(offer), 'Offer not found'
bid.initiate_tx = session.query(SwapTx).filter(sa.and_(SwapTx.bid_id == bid.bid_id, SwapTx.tx_type == TxTypes.ITX)).first()
bid.participate_tx = session.query(SwapTx).filter(sa.and_(SwapTx.bid_id == bid.bid_id, SwapTx.tx_type == TxTypes.PTX)).first()
self.swaps_in_progress[bid.bid_id] = (bid, offer)
coin_from = Coins(offer.coin_from)
coin_to = Coins(offer.coin_to)
if bid.initiate_tx:
self.addWatchedOutput(coin_from, bid.bid_id, bid.initiate_tx.txid.hex(), bid.initiate_tx.vout, BidStates.SWAP_INITIATED)
if bid.participate_tx:
self.addWatchedOutput(coin_to, bid.bid_id, bid.participate_tx.txid.hex(), bid.participate_tx.vout, BidStates.SWAP_PARTICIPATING)
if self.coin_clients[coin_from]['last_height_checked'] < 1:
if bid.initiate_tx and bid.initiate_tx.chain_height:
self.coin_clients[coin_from]['last_height_checked'] = bid.initiate_tx.chain_height
if self.coin_clients[coin_to]['last_height_checked'] < 1:
if bid.participate_tx and bid.participate_tx.chain_height:
self.coin_clients[coin_to]['last_height_checked'] = bid.participate_tx.chain_height
finally:
session.close()
session.remove()
self.mxDB.release()
def initialise(self):
self.log.debug('network_key %s\nnetwork_pubkey %s\nnetwork_addr %s',
self.network_key, self.network_pubkey, self.network_addr)
ro = self.callrpc('smsglocalkeys')
found = False
for k in ro['smsg_keys']:
if k['address'] == self.network_addr:
found = True
break
if not found:
self.log.info('Importing network key to SMSG')
self.callrpc('smsgimportprivkey', [self.network_key, 'basicswap offers'])
ro = self.callrpc('smsglocalkeys', ['anon', '-', self.network_addr])
assert(ro['result'] == 'Success.'), 'smsglocalkeys failed'
# TODO: Ensure smsg is enabled for the active wallet.
self.loadFromDB()
# Scan inbox
options = {'encoding': 'hex'}
ro = self.callrpc('smsginbox', ['unread', '', options])
nm = 0
for msg in ro['messages']:
self.processMsg(msg)
nm += 1
self.log.info('Scanned %d unread messages.', nm)
def validateOfferAmounts(self, coin_from, coin_to, amount, rate, min_bid_amount):
assert(amount >= min_bid_amount), 'amount < min_bid_amount'
assert(amount > chainparams[coin_from][self.chain]['min_amount']), 'From amount below min value for chain'
assert(amount < chainparams[coin_from][self.chain]['max_amount']), 'From amount above max value for chain'
amount_to = (amount * rate) // COIN
assert(amount_to > chainparams[coin_to][self.chain]['min_amount']), 'To amount below min value for chain'
assert(amount_to < chainparams[coin_to][self.chain]['max_amount']), 'To amount above max value for chain'
def validateOfferLockValue(self, coin_from, coin_to, lock_type, lock_value):
if lock_type == OfferMessage.SEQUENCE_LOCK_TIME:
assert(lock_value >= 2 * 60 * 60 and lock_value <= 96 * 60 * 60), 'Invalid lock_value time'
assert(self.coin_clients[coin_from]['use_csv'] and self.coin_clients[coin_to]['use_csv']), 'Both coins need CSV activated.'
elif lock_type == OfferMessage.SEQUENCE_LOCK_BLOCKS:
assert(lock_value >= 5 and lock_value <= 1000), 'Invalid lock_value blocks'
assert(self.coin_clients[coin_from]['use_csv'] and self.coin_clients[coin_to]['use_csv']), 'Both coins need CSV activated.'
elif lock_type == ABS_LOCK_TIME:
# TODO: range?
assert(not self.coin_clients[coin_from]['use_csv'] or not self.coin_clients[coin_to]['use_csv']), 'Should use CSV.'
assert(lock_value >= 4 * 60 * 60 and lock_value <= 96 * 60 * 60), 'Invalid lock_value time'
elif lock_type == ABS_LOCK_BLOCKS:
# TODO: range?
assert(not self.coin_clients[coin_from]['use_csv'] or not self.coin_clients[coin_to]['use_csv']), 'Should use CSV.'
assert(lock_value >= 10 and lock_value <= 1000), 'Invalid lock_value blocks'
else:
raise ValueError('Unknown locktype')
def postOffer(self, coin_from, coin_to, amount, rate, min_bid_amount, swap_type,
lock_type=SEQUENCE_LOCK_TIME, lock_value=48 * 60 * 60, auto_accept_bids=False, addr_send_from=None):
# Offer to send offer.amount_from of coin_from in exchange for offer.amount_from * offer.rate of coin_to
assert(coin_from != coin_to), 'coin_from == coin_to'
try:
coin_from_t = Coins(coin_from)
except Exception:
raise ValueError('Unknown coin from type')
try:
coin_to_t = Coins(coin_to)
except Exception:
raise ValueError('Unknown coin to type')
self.validateOfferAmounts(coin_from_t, coin_to_t, amount, rate, min_bid_amount)
self.validateOfferLockValue(coin_from_t, coin_to_t, lock_type, lock_value)
self.mxDB.acquire()
try:
proof_addr, proof_sig = self.getProofOfFunds(coin_from_t, amount)
# TODO: require prrof of funds on offers?
msg_buf = OfferMessage()
msg_buf.coin_from = int(coin_from)
msg_buf.coin_to = int(coin_to)
msg_buf.amount_from = int(amount)
msg_buf.rate = int(rate)
msg_buf.min_bid_amount = int(min_bid_amount)
msg_buf.time_valid = 60 * 60
msg_buf.lock_type = lock_type
msg_buf.lock_value = lock_value
msg_buf.swap_type = swap_type
offer_bytes = msg_buf.SerializeToString()
payload_hex = str.format('{:02x}', MessageTypes.OFFER) + offer_bytes.hex()
if addr_send_from is None:
offer_addr = self.callrpc('getnewaddress')
else:
offer_addr = addr_send_from
self.callrpc('smsgaddlocaladdress', [offer_addr]) # Enable receiving smsg
ro = self.callrpc('smsgsend', [offer_addr, self.network_addr, payload_hex, False, 1, False, False, True])
msg_id = ro['msgid']
offer_id = bytes.fromhex(msg_id)
session = scoped_session(self.session_factory)
offer = Offer(
offer_id=offer_id,
coin_from=msg_buf.coin_from,
coin_to=msg_buf.coin_to,
amount_from=msg_buf.amount_from,
rate=msg_buf.rate,
min_bid_amount=msg_buf.min_bid_amount,
time_valid=msg_buf.time_valid,
lock_type=int(msg_buf.lock_type),
lock_value=msg_buf.lock_value,
swap_type=msg_buf.swap_type,
addr_from=offer_addr,
created_at=int(time.time()),
expire_at=int(time.time()) + msg_buf.time_valid,
was_sent=True,
auto_accept_bids=auto_accept_bids,)
offer.setState(OfferStates.OFFER_SENT)
session.add(offer)
session.add(SentOffer(offer_id=offer_id))
if addr_send_from is None:
session.add(SmsgAddress(addr=offer_addr, use_type=MessageTypes.OFFER))
session.commit()
session.close()
session.remove()
finally:
self.mxDB.release()
self.log.info('Sent OFFER %s', offer_id.hex())
return offer_id
def getContractPubkey(self, date, contract_count):
account = self.callcoinrpc(Coins.PART, 'extkey', ['account'])
# Derive an address to use for a contract
evkey = self.callcoinrpc(Coins.PART, 'extkey', ['account', 'default', 'true'])['evkey']
# Should the coin path be included?
path = '44445555h'
path += '/' + str(date.year) + '/' + str(date.month) + '/' + str(date.day)
path += '/' + str(contract_count)
extkey = self.callcoinrpc(Coins.PART, 'extkey', ['info', evkey, path])['key_info']['result']
pubkey = self.callcoinrpc(Coins.PART, 'extkey', ['info', extkey])['key_info']['pubkey']
return bytes.fromhex(pubkey)
def getContractPrivkey(self, date, contract_count):
# Derive an address to use for a contract
evkey = self.callcoinrpc(Coins.PART, 'extkey', ['account', 'default', 'true'])['evkey']
path = '44445555h'
path += '/' + str(date.year) + '/' + str(date.month) + '/' + str(date.day)
path += '/' + str(contract_count)
extkey = self.callcoinrpc(Coins.PART, 'extkey', ['info', evkey, path])['key_info']['result']
privkey = self.callcoinrpc(Coins.PART, 'extkey', ['info', extkey])['key_info']['privkey']
raw = decodeAddress(privkey)[1:]
if len(raw) > 32:
raw = raw[:32]
return raw
def getContractSecret(self, date, contract_count):
# Derive a key to use for a contract secret
evkey = self.callcoinrpc(Coins.PART, 'extkey', ['account', 'default', 'true'])['evkey']
path = '44445555h/99999'
path += '/' + str(date.year) + '/' + str(date.month) + '/' + str(date.day)
path += '/' + str(contract_count)
return hashlib.sha256(bytes(self.callcoinrpc(Coins.PART, 'extkey', ['info', evkey, path])['key_info']['result'], 'utf-8')).digest()
def getReceiveAddressFromPool(self, coin_type, bid_id, tx_type):
self.log.debug('Get address from pool bid_id {}, type {}, coin {}'.format(bid_id.hex(), tx_type, coin_type))
self.mxDB.acquire()
try:
session = scoped_session(self.session_factory)
record = session.query(PooledAddress).filter(sa.and_(PooledAddress.coin_type == int(coin_type), PooledAddress.bid_id == None)).first() # noqa E712
if not record:
address = self.getReceiveAddressForCoin(coin_type)
record = PooledAddress(
addr=address,
coin_type=int(coin_type))
record.bid_id = bid_id
record.tx_type = tx_type
addr = record.addr
session.add(record)
session.commit()
session.close()
session.remove()
finally:
self.mxDB.release()
return addr
def returnAddressToPool(self, bid_id, tx_type):
self.log.debug('Return address to pool bid_id {}, type {}'.format(bid_id.hex(), tx_type))
self.mxDB.acquire()
try:
session = scoped_session(self.session_factory)
try:
record = session.query(PooledAddress).filter(sa.and_(PooledAddress.bid_id == bid_id, PooledAddress.tx_type == tx_type)).one()
self.log.debug('Returning address to pool addr {}'.format(record.addr))
record.bid_id = None
session.commit()
except Exception as ex:
pass
session.close()
session.remove()
finally:
self.mxDB.release()
def getReceiveAddressForCoin(self, coin_type):
if coin_type == Coins.PART:
new_addr = self.callcoinrpc(Coins.PART, 'getnewaddress')
elif coin_type == Coins.LTC or coin_type == Coins.BTC or coin_type == Coins.NMC:
args = []
if self.coin_clients[coin_type]['use_segwit']:
args = ['swap_receive', 'bech32']
new_addr = self.callcoinrpc(coin_type, 'getnewaddress', args)
else:
raise ValueError('Unknown coin type.')
self.log.debug('Generated new receive address %s for %s', new_addr, str(coin_type))
return new_addr
def getRelayFeeRateForCoin(self, coin_type):
return self.callcoinrpc(coin_type, 'getnetworkinfo')['relayfee']
def getFeeRateForCoin(self, coin_type):
# TODO: Per coin settings to override feerate
override_feerate = self.coin_clients[coin_type].get('override_feerate', None)
if override_feerate:
return override_feerate
try:
return self.callcoinrpc(coin_type, 'estimatesmartfee', [2])['feerate']
except Exception:
try:
fee_rate = self.callcoinrpc(coin_type, 'getwalletinfo')['paytxfee']
assert(fee_rate > 0.0), '0 feerate'
return fee_rate
except Exception:
return self.callcoinrpc(coin_type, 'getnetworkinfo')['relayfee']
def getTicker(self, coin_type):
ticker = chainparams[coin_type]['ticker']
if self.chain == 'testnet':
ticker = 't' + ticker
if self.chain == 'regtest':
ticker = 'rt' + ticker
return ticker
def withdrawCoin(self, coin_type, value, addr_to, subfee):
self.log.info('withdrawCoin %s %s to %s %s', value, self.getTicker(coin_type), addr_to, ' subfee' if subfee else '')
params = [addr_to, value, '', '', subfee, True, self.coin_clients[coin_type]['conf_target']]
if coin_type == Coins.PART:
params.insert(5, '') # narration
return self.callcoinrpc(coin_type, 'sendtoaddress', params)
def cacheNewAddressForCoin(self, coin_type):
self.log.debug('cacheNewAddressForCoin %s', coin_type)
key_str = 'receive_addr_' + chainparams[coin_type]['name']
session = scoped_session(self.session_factory)
addr = self.getReceiveAddressForCoin(coin_type)
self.mxDB.acquire()
try:
session = scoped_session(self.session_factory)
try:
kv = session.query(DBKVString).filter_by(key=key_str).first()
kv.value = addr
except Exception:
kv = DBKVString(
key=key_str,
value=addr
)
session.add(kv)
session.commit()
session.close()
session.remove()
finally:
self.mxDB.release()
return addr
def getCachedAddressForCoin(self, coin_type):
self.log.debug('getCachedAddressForCoin %s', coin_type)
# TODO: auto refresh after used
key_str = 'receive_addr_' + chainparams[coin_type]['name']
self.mxDB.acquire()
try:
session = scoped_session(self.session_factory)
try:
addr = session.query(DBKVString).filter_by(key=key_str).first().value
except Exception:
addr = self.getReceiveAddressForCoin(coin_type)
session.add(DBKVString(
key=key_str,
value=addr
))
session.commit()
session.close()
session.remove()
finally:
self.mxDB.release()
return addr
def getNewContractId(self):
self.mxDB.acquire()
try:
self._contract_count += 1
session = scoped_session(self.session_factory)
self.engine.execute('UPDATE kv_int SET value = {} WHERE KEY="contract_count"'.format(self._contract_count))
session.commit()
session.close()
session.remove()
finally:
self.mxDB.release()
return self._contract_count
def getProofOfFunds(self, coin_type, amount_for):
self.log.debug('getProofOfFunds %s %s', str(coin_type), format8(amount_for))
if self.coin_clients[coin_type]['connection_type'] != 'rpc':
return (None, None)
# TODO: Lock unspent and use same output/s to fund bid
unspent_addr = dict()
unspent = self.callcoinrpc(coin_type, 'listunspent')
for u in unspent:
unspent_addr[u['address']] = unspent_addr.get(u['address'], 0.0) * COIN + u['amount'] * COIN
sign_for_addr = None
for addr, value in unspent_addr.items():
if value >= amount_for:
sign_for_addr = addr
break
assert(sign_for_addr is not None), 'Could not find address with enough funds for proof'
self.log.debug('sign_for_addr %s', sign_for_addr)
if self.coin_clients[coin_type]['use_segwit']:
# 'Address does not refer to key' for non p2pkh
addrinfo = self.callcoinrpc(coin_type, 'getaddressinfo', [sign_for_addr])
pkh = addrinfo['scriptPubKey'][4:]
sign_for_addr = encodeAddress(bytes((chainparams[coin_type][self.chain]['pubkey_address'],)) + bytes.fromhex(pkh))
self.log.debug('sign_for_addr converted %s', sign_for_addr)
signature = self.callcoinrpc(coin_type, 'signmessage', [sign_for_addr, sign_for_addr + '_swap_proof'])
return (sign_for_addr, signature)
def saveBidInSession(self, bid_id, bid, session):
session.add(bid)
if bid.initiate_tx:
session.add(bid.initiate_tx)
if bid.participate_tx:
session.add(bid.participate_tx)
def saveBid(self, bid_id, bid):
self.mxDB.acquire()
try:
session = scoped_session(self.session_factory)
self.saveBidInSession(bid_id, bid, session)
session.commit()
session.close()
session.remove()
finally:
self.mxDB.release()
def postBid(self, offer_id, amount, addr_send_from=None):
# Bid to send bid.amount * offer.rate of coin_to in exchange for bid.amount of coin_from
self.log.debug('postBid %s %s', offer_id.hex(), format8(amount))
self.mxDB.acquire()
try:
offer = self.getOffer(offer_id)
assert(offer), 'Offer not found: {}.'.format(offer_id.hex())
assert(offer.expire_at > int(time.time())), 'Offer has expired'
msg_buf = BidMessage()
msg_buf.offer_msg_id = offer_id
msg_buf.time_valid = 60 * 10
msg_buf.amount = int(amount) # amount of coin_from
coin_from = Coins(offer.coin_from)
coin_to = Coins(offer.coin_to)
contract_count = self.getNewContractId()
now = int(time.time())
if offer.swap_type == SwapTypes.SELLER_FIRST:
msg_buf.pkhash_buyer = getKeyID(self.getContractPubkey(dt.datetime.fromtimestamp(now).date(), contract_count))
proof_addr, proof_sig = self.getProofOfFunds(coin_to, msg_buf.amount)
msg_buf.proof_address = proof_addr
msg_buf.proof_signature = proof_sig
bid_bytes = msg_buf.SerializeToString()
payload_hex = str.format('{:02x}', MessageTypes.BID) + bid_bytes.hex()
if addr_send_from is None:
bid_addr = self.callrpc('getnewaddress')
else:
bid_addr = addr_send_from
self.callrpc('smsgaddlocaladdress', [bid_addr]) # Enable receiving smsg
ro = self.callrpc('smsgsend', [bid_addr, offer.addr_from, payload_hex, False, 1, False, False, True])
msg_id = ro['msgid']
bid_id = bytes.fromhex(msg_id)
bid = Bid(
bid_id=bid_id,
offer_id=offer_id,
amount=msg_buf.amount,
pkhash_buyer=msg_buf.pkhash_buyer,
proof_address=msg_buf.proof_address,
created_at=now,
contract_count=contract_count,
amount_to=(msg_buf.amount * offer.rate) // COIN,
expire_at=now + msg_buf.time_valid,
bid_addr=bid_addr,
was_sent=True,
)
bid.setState(BidStates.BID_SENT)
session = scoped_session(self.session_factory)
self.saveBidInSession(bid_id, bid, session)
if addr_send_from is None:
session.add(SmsgAddress(addr=bid_addr, use_type=MessageTypes.BID))
session.commit()
session.close()
session.remove()
self.log.info('Sent BID %s', bid_id.hex())
return bid_id
finally:
self.mxDB.release()
def getOffer(self, offer_id, sent=False):
self.mxDB.acquire()
try:
session = scoped_session(self.session_factory)
return session.query(Offer).filter_by(offer_id=offer_id).first()
finally:
session.close()
session.remove()
self.mxDB.release()
def getBid(self, bid_id):
self.mxDB.acquire()
try:
session = scoped_session(self.session_factory)
bid = session.query(Bid).filter_by(bid_id=bid_id).first()
if bid:
bid.initiate_tx = session.query(SwapTx).filter(sa.and_(SwapTx.bid_id == bid_id, SwapTx.tx_type == TxTypes.ITX)).first()
bid.participate_tx = session.query(SwapTx).filter(sa.and_(SwapTx.bid_id == bid_id, SwapTx.tx_type == TxTypes.PTX)).first()
return bid
finally:
session.close()
session.remove()
self.mxDB.release()
def getBidAndOffer(self, bid_id):
self.mxDB.acquire()
try:
session = scoped_session(self.session_factory)
bid = session.query(Bid).filter_by(bid_id=bid_id).first()
if bid:
bid.initiate_tx = session.query(SwapTx).filter(sa.and_(SwapTx.bid_id == bid_id, SwapTx.tx_type == TxTypes.ITX)).first()
bid.participate_tx = session.query(SwapTx).filter(sa.and_(SwapTx.bid_id == bid_id, SwapTx.tx_type == TxTypes.PTX)).first()
return bid, session.query(Offer).filter_by(offer_id=bid.offer_id).first() if bid is not None else None
finally:
session.close()
session.remove()
self.mxDB.release()
def acceptBid(self, bid_id):
self.log.info('Accepting bid %s', bid_id.hex())
bid, offer = self.getBidAndOffer(bid_id)
assert(bid), 'Bid not found'
assert(offer), 'Offer not found'
# Ensure bid is still valid
now = int(time.time())
assert(bid.expire_at > now), 'Bid expired'
assert(bid.state == BidStates.BID_RECEIVED), 'Wrong bid state: {}'.format(BidStates(bid.state))
if bid.contract_count is None:
bid.contract_count = self.getNewContractId()
coin_from = Coins(offer.coin_from)
bid_date = dt.datetime.fromtimestamp(bid.created_at).date()
secret = self.getContractSecret(bid_date, bid.contract_count)
secret_hash = hashlib.sha256(secret).digest()
pubkey_refund = self.getContractPubkey(bid_date, bid.contract_count)
pkhash_refund = getKeyID(pubkey_refund)
if offer.lock_type < ABS_LOCK_BLOCKS:
sequence = getExpectedSequence(offer.lock_type, offer.lock_value, coin_from)
script = buildContractScript(sequence, secret_hash, bid.pkhash_buyer, pkhash_refund)
else:
if offer.lock_type == ABS_LOCK_BLOCKS:
lock_value = self.callcoinrpc(coin_from, 'getblockchaininfo')['blocks'] + offer.lock_value
else:
lock_value = int(time.time()) + offer.lock_value
self.log.debug('initiate %s lock_value %d %d', coin_from, offer.lock_value, lock_value)
script = buildContractScript(lock_value, secret_hash, bid.pkhash_buyer, pkhash_refund, OpCodes.OP_CHECKLOCKTIMEVERIFY)
p2sh = self.callcoinrpc(Coins.PART, 'decodescript', [script.hex()])['p2sh']
bid.pkhash_seller = pkhash_refund
txn = self.createInitiateTxn(coin_from, bid_id, bid, script)
# Store the signed refund txn in case wallet is locked when refund is possible
refund_txn = self.createRefundTxn(coin_from, txn, offer, bid, script)
bid.initiate_txn_refund = bytes.fromhex(refund_txn)
txid = self.submitTxn(coin_from, txn)
self.log.debug('Submitted initiate txn %s to %s chain for bid %s', txid, chainparams[coin_from]['name'], bid_id.hex())
bid.initiate_tx = SwapTx(
bid_id=bid_id,
tx_type=TxTypes.ITX,
txid=bytes.fromhex(txid),
script=script,
)
bid.setITxState(TxStates.TX_SENT)
# Check non-bip68 final
try:
txid = self.submitTxn(coin_from, bid.initiate_txn_refund.hex())
self.log.error('Submit refund_txn unexpectedly worked: ' + txid)
except Exception as ex:
if 'non-BIP68-final' not in str(ex) and 'non-final' not in str(ex):
self.log.error('Submit refund_txn unexpected error' + str(ex))
if txid is not None:
msg_buf = BidAcceptMessage()
msg_buf.bid_msg_id = bid_id
msg_buf.initiate_txid = bytes.fromhex(txid)
msg_buf.contract_script = bytes(script)
bid_bytes = msg_buf.SerializeToString()
payload_hex = str.format('{:02x}', MessageTypes.BID_ACCEPT) + bid_bytes.hex()
ro = self.callrpc('smsgsend', [offer.addr_from, bid.bid_addr, payload_hex, False, 1, False, False, True])
msg_id = ro['msgid']
accept_msg_id = bytes.fromhex(msg_id)
bid.accept_msg_id = accept_msg_id
bid.setState(BidStates.BID_ACCEPTED)
self.log.info('Sent BID_ACCEPT %s', accept_msg_id.hex())
self.saveBid(bid_id, bid)
self.swaps_in_progress[bid_id] = (bid, offer)
def abandonOffer(self, offer_id):
self.log.info('Abandoning Offer %s', offer_id.hex())
self.mxDB.acquire()
try:
session = scoped_session(self.session_factory)
offer = session.query(Offer).filter_by(offer_id=offer_id).first()
assert(offer), 'Offer not found'
# TODO: abandon linked bids?
# Mark bid as abandoned, no further processing will be done
offer.setState(OfferStates.OFFER_ABANDONED)
session.commit()
finally:
session.close()
session.remove()
self.mxDB.release()
def abandonBid(self, bid_id):
self.log.info('Abandoning Bid %s', bid_id.hex())
self.mxDB.acquire()
try:
session = scoped_session(self.session_factory)
bid = session.query(Bid).filter_by(bid_id=bid_id).first()
assert(bid), 'Bid not found'
offer = session.query(Offer).filter_by(offer_id=bid.offer_id).first()
assert(offer), 'Offer not found'
# Mark bid as abandoned, no further processing will be done
bid.setState(BidStates.BID_ABANDONED)
session.commit()
# Remove from in progress
self.swaps_in_progress.pop(bid_id, None)
# Remove any watched outputs
self.removeWatchedOutput(Coins(offer.coin_from), bid_id, None)
self.removeWatchedOutput(Coins(offer.coin_to), bid_id, None)
# Return unused addrs to pool
if bid.getITxState() != TxStates.TX_REDEEMED:
self.returnAddressToPool(bid_id, TxTypes.ITX_REDEEM)
if bid.getITxState() != TxStates.TX_REFUNDED:
self.returnAddressToPool(bid_id, TxTypes.ITX_REFUND)
if bid.getPTxState() != TxStates.TX_REDEEMED:
self.returnAddressToPool(bid_id, TxTypes.PTX_REDEEM)
if bid.getPTxState() != TxStates.TX_REFUNDED:
self.returnAddressToPool(bid_id, TxTypes.PTX_REFUND)
finally:
session.close()
session.remove()
self.mxDB.release()
def encodeSegwitP2WSH(self, coin_type, p2wsh):
return segwit_addr.encode(chainparams[coin_type][self.chain]['hrp'], 0, p2wsh[2:])
def encodeSegwit(self, coin_type, raw):
return segwit_addr.encode(chainparams[coin_type][self.chain]['hrp'], 0, raw)
def decodeSegwit(self, coin_type, addr):
return bytes(segwit_addr.decode(chainparams[coin_type][self.chain]['hrp'], addr)[1])
def getScriptAddress(self, coin_type, script):
return pubkeyToAddress(chainparams[coin_type][self.chain]['script_address'], script)
def setBidError(self, bif_id, bid, error_str):
bid.setState(BidStates.BID_ERROR)
bid.state_note = 'error msg: ' + error_str
self.saveBid(bif_id, bid)
def createInitiateTxn(self, coin_type, bid_id, bid, initiate_script):
if self.coin_clients[coin_type]['connection_type'] != 'rpc':
return None
if self.coin_clients[coin_type]['use_segwit']:
addr_to = self.encodeSegwitP2WSH(coin_type, getP2WSH(initiate_script))
else:
addr_to = self.getScriptAddress(coin_type, initiate_script)
self.log.debug('Create initiate txn for coin %s to %s for bid %s', str(coin_type), addr_to, bid_id.hex())
txn = self.callcoinrpc(coin_type, 'createrawtransaction', [[], {addr_to: format8(bid.amount)}])
options = {
'lockUnspents': True,
'conf_target': self.coin_clients[coin_type]['conf_target'],
}
txn_funded = self.callcoinrpc(coin_type, 'fundrawtransaction', [txn, options])['hex']
txn_signed = self.callcoinrpc(coin_type, 'signrawtransactionwithwallet', [txn_funded])['hex']
return txn_signed
def deriveParticipateScript(self, bid_id, bid, offer):
self.log.debug('deriveParticipateScript for bid %s', bid_id.hex())
coin_to = Coins(offer.coin_to)
bid_date = dt.datetime.fromtimestamp(bid.created_at).date()
secret_hash = extractScriptSecretHash(bid.initiate_tx.script)
pkhash_seller = bid.pkhash_seller
pkhash_buyer_refund = bid.pkhash_buyer
# Participate txn is locked for half the time of the initiate txn
lock_value = offer.lock_value // 2
if offer.lock_type < ABS_LOCK_BLOCKS:
sequence = getExpectedSequence(offer.lock_type, lock_value, coin_to)
participate_script = buildContractScript(sequence, secret_hash, pkhash_seller, pkhash_buyer_refund)
else:
# Lock from the height or time of the block containing the initiate txn
coin_from = Coins(offer.coin_from)
initiate_tx_block_hash = self.callcoinrpc(coin_from, 'getblockhash', [bid.initiate_tx.chain_height, ])
initiate_tx_block_time = int(self.callcoinrpc(coin_from, 'getblock', [initiate_tx_block_hash, ])['time'])
if offer.lock_type == ABS_LOCK_BLOCKS:
# Walk the coin_to chain back until block time matches
blockchaininfo = self.callcoinrpc(coin_to, 'getblockchaininfo')
cblock_hash = blockchaininfo['bestblockhash']
cblock_height = blockchaininfo['blocks']
max_tries = 1000
for i in range(max_tries):
self.log.debug('wtf %d', i)
prev_block = self.callcoinrpc(coin_to, 'getblock', [cblock_hash, ])
self.log.debug('prev_block %s', str(prev_block))
if prev_block['time'] <= initiate_tx_block_time:
break
# cblock_hash and height are out of step unless loop breaks
cblock_hash = prev_block['previousblockhash']
cblock_height = prev_block['height']
assert(prev_block['time'] <= initiate_tx_block_time), 'Block not found for lock height'
self.log.debug('Setting lock value from height of block %s %s', coin_to, cblock_hash)
contract_lock_value = cblock_height + lock_value
else:
self.log.debug('Setting lock value from time of block %s %s', coin_from, initiate_tx_block_hash)
contract_lock_value = initiate_tx_block_time + lock_value
self.log.debug('participate %s lock_value %d %d', coin_to, lock_value, contract_lock_value)
participate_script = buildContractScript(contract_lock_value, secret_hash, pkhash_seller, pkhash_buyer_refund, OpCodes.OP_CHECKLOCKTIMEVERIFY)
return participate_script
def createParticipateTxn(self, bid_id, bid, offer, participate_script):
self.log.debug('createParticipateTxn')
offer_id = bid.offer_id
coin_to = Coins(offer.coin_to)
if self.coin_clients[coin_to]['connection_type'] != 'rpc':
return None
amount_to = bid.amount_to
# Check required?
assert(amount_to == (bid.amount * offer.rate) // COIN)
if self.coin_clients[coin_to]['use_segwit']:
p2wsh = getP2WSH(participate_script)
addr_to = self.encodeSegwitP2WSH(coin_to, p2wsh)
else:
addr_to = self.getScriptAddress(coin_to, participate_script)
txn = self.callcoinrpc(coin_to, 'createrawtransaction', [[], {addr_to: format8(amount_to)}])
options = {
'lockUnspents': True,
'conf_target': self.coin_clients[coin_to]['conf_target'],
}
txn_funded = self.callcoinrpc(coin_to, 'fundrawtransaction', [txn, options])['hex']
txn_signed = self.callcoinrpc(coin_to, 'signrawtransactionwithwallet', [txn_funded])['hex']
refund_txn = self.createRefundTxn(coin_to, txn_signed, offer, bid, participate_script, tx_type=TxTypes.PTX_REFUND)
bid.participate_txn_refund = bytes.fromhex(refund_txn)
chain_height = self.callcoinrpc(coin_to, 'getblockchaininfo')['blocks']
txjs = self.callcoinrpc(coin_to, 'decoderawtransaction', [txn_signed])
txid = txjs['txid']
if self.coin_clients[coin_to]['use_segwit']:
vout = getVoutByP2WSH(txjs, p2wsh.hex())
else:
vout = getVoutByAddress(txjs, addr_to)
self.addParticipateTxn(bid_id, bid, coin_to, txid, vout, chain_height)
bid.participate_tx.script = participate_script
return txn_signed
def getContractSpendTxVSize(self, coin_type, redeem=True):
tx_vsize = 5 # Add a few bytes, sequence in script takes variable amount of bytes
if coin_type == Coins.PART:
tx_vsize += 204 if redeem else 187
if self.coin_clients[coin_type]['use_segwit']:
tx_vsize += 143 if redeem else 134
else:
tx_vsize += 323 if redeem else 287
return tx_vsize
def createRedeemTxn(self, coin_type, bid, for_txn_type='participate', addr_redeem_out=None, fee_rate=None):
self.log.debug('createRedeemTxn for coin %s', str(coin_type))
if for_txn_type == 'participate':
prev_txnid = bid.participate_tx.txid.hex()
prev_n = bid.participate_tx.vout
txn_script = bid.participate_tx.script
prev_amount = bid.amount_to
else:
prev_txnid = bid.initiate_tx.txid.hex()
prev_n = bid.initiate_tx.vout
txn_script = bid.initiate_tx.script
prev_amount = bid.amount
if self.coin_clients[coin_type]['use_segwit']:
prev_p2wsh = getP2WSH(txn_script)
script_pub_key = prev_p2wsh.hex()
else:
script_pub_key = getP2SHScriptForHash(getKeyID(txn_script)).hex()
prevout = {
'txid': prev_txnid,
'vout': prev_n,
'scriptPubKey': script_pub_key,
'redeemScript': txn_script.hex(),
'amount': format8(prev_amount)}
bid_date = dt.datetime.fromtimestamp(bid.created_at).date()
wif_prefix = chainparams[Coins.PART][self.chain]['key_prefix']
pubkey = self.getContractPubkey(bid_date, bid.contract_count)
privkey = toWIF(wif_prefix, self.getContractPrivkey(bid_date, bid.contract_count))
secret = bid.recovered_secret
if secret is None:
secret = self.getContractSecret(bid_date, bid.contract_count)
assert(len(secret) == 32), 'Bad secret length'
if self.coin_clients[coin_type]['connection_type'] != 'rpc':
return None
prevout_s = ' in={}:{}'.format(prev_txnid, prev_n)
if fee_rate is None:
fee_rate = self.getFeeRateForCoin(coin_type)
tx_vsize = self.getContractSpendTxVSize(coin_type)
tx_fee = (fee_rate * tx_vsize) / 1000
self.log.debug('Redeem tx fee %s, rate %s', format8(tx_fee * COIN), str(fee_rate))
amount_out = prev_amount - tx_fee * COIN
assert(amount_out > 0), 'Amount out <= 0'
if addr_redeem_out is None:
addr_redeem_out = self.getReceiveAddressFromPool(coin_type, bid.bid_id, TxTypes.PTX_REDEEM if for_txn_type == 'participate' else TxTypes.ITX_REDEEM)
assert(addr_redeem_out is not None)
if self.coin_clients[coin_type]['use_segwit']:
# Change to btc hrp
addr_redeem_out = self.encodeSegwit(Coins.PART, self.decodeSegwit(coin_type, addr_redeem_out))
else:
addr_redeem_out = replaceAddrPrefix(addr_redeem_out, Coins.PART, self.chain)
self.log.debug('addr_redeem_out %s', addr_redeem_out)
output_to = ' outaddr={}:{}'.format(format8(amount_out), addr_redeem_out)
if coin_type == Coins.PART:
redeem_txn = self.calltx('-create' + prevout_s + output_to)
else:
redeem_txn = self.calltx('-btcmode -create nversion=2' + prevout_s + output_to)
options = {}
if self.coin_clients[coin_type]['use_segwit']:
options['force_segwit'] = True
redeem_sig = self.callcoinrpc(Coins.PART, 'createsignaturewithkey', [redeem_txn, prevout, privkey, 'ALL', options])
if coin_type == Coins.PART or self.coin_clients[coin_type]['use_segwit']:
witness_stack = [
redeem_sig,
pubkey.hex(),
secret.hex(),
'01',
txn_script.hex()]
redeem_txn = self.calltx(redeem_txn + ' witness=0:' + ':'.join(witness_stack))
else:
script = format(len(redeem_sig) // 2, '02x') + redeem_sig
script += format(33, '02x') + pubkey.hex()
script += format(32, '02x') + secret.hex()
script += format(OpCodes.OP_1, '02x')
script += format(OpCodes.OP_PUSHDATA1, '02x') + format(len(txn_script), '02x') + txn_script.hex()
redeem_txn = self.calltx(redeem_txn + ' scriptsig=0:' + script)
ro = self.callcoinrpc(Coins.PART, 'verifyrawtransaction', [redeem_txn, [prevout]])
assert(ro['inputs_valid'] is True), 'inputs_valid is false'
assert(ro['complete'] is True), 'complete is false'
assert(ro['validscripts'] == 1), 'validscripts != 1'
if self.debug:
# Check fee
if self.coin_clients[coin_type]['connection_type'] == 'rpc':
redeem_txjs = self.callcoinrpc(coin_type, 'decoderawtransaction', [redeem_txn])
self.log.debug('vsize paid, actual vsize %d %d', tx_vsize, redeem_txjs['vsize'])
assert(tx_vsize >= redeem_txjs['vsize']), 'Underpaid fee'
redeem_txjs = self.callcoinrpc(Coins.PART, 'decoderawtransaction', [redeem_txn])
self.log.debug('Have valid redeem txn %s for contract %s tx %s', redeem_txjs['txid'], for_txn_type, prev_txnid)
return redeem_txn
def createRefundTxn(self, coin_type, txn, offer, bid, txn_script, addr_refund_out=None, tx_type=TxTypes.ITX_REFUND):
self.log.debug('createRefundTxn')
if self.coin_clients[coin_type]['connection_type'] != 'rpc':
return None
txjs = self.callcoinrpc(Coins.PART, 'decoderawtransaction', [txn])
if self.coin_clients[coin_type]['use_segwit']:
p2wsh = getP2WSH(txn_script)
vout = getVoutByP2WSH(txjs, p2wsh.hex())
else:
addr_to = self.getScriptAddress(Coins.PART, txn_script)
vout = getVoutByAddress(txjs, addr_to)
bid_date = dt.datetime.fromtimestamp(bid.created_at).date()
wif_prefix = chainparams[Coins.PART][self.chain]['key_prefix']
pubkey = self.getContractPubkey(bid_date, bid.contract_count)
privkey = toWIF(wif_prefix, self.getContractPrivkey(bid_date, bid.contract_count))
prev_amount = txjs['vout'][vout]['value']
prevout = {
'txid': txjs['txid'],
'vout': vout,
'scriptPubKey': txjs['vout'][vout]['scriptPubKey']['hex'],
'redeemScript': txn_script.hex(),
'amount': prev_amount}
lock_value = DeserialiseNum(txn_script, 64)
if offer.lock_type < ABS_LOCK_BLOCKS:
sequence = lock_value
else:
sequence = 1
prevout_s = ' in={}:{}:{}'.format(txjs['txid'], vout, sequence)
fee_rate = self.getFeeRateForCoin(coin_type)
tx_vsize = self.getContractSpendTxVSize(coin_type, False)
tx_fee = (fee_rate * tx_vsize) / 1000
self.log.debug('Refund tx fee %s, rate %s', format8(tx_fee * COIN), str(fee_rate))
amount_out = prev_amount * COIN - tx_fee * COIN
assert(amount_out > 0), 'Amount out <= 0'
if addr_refund_out is None:
addr_refund_out = self.getReceiveAddressFromPool(coin_type, bid.bid_id, tx_type)
assert(addr_refund_out is not None), 'addr_refund_out is null'
if self.coin_clients[coin_type]['use_segwit']:
# Change to btc hrp
addr_refund_out = self.encodeSegwit(Coins.PART, self.decodeSegwit(coin_type, addr_refund_out))
else:
addr_refund_out = replaceAddrPrefix(addr_refund_out, Coins.PART, self.chain)
self.log.debug('addr_refund_out %s', addr_refund_out)
output_to = ' outaddr={}:{}'.format(format8(amount_out), addr_refund_out)
if coin_type == Coins.PART:
refund_txn = self.calltx('-create' + prevout_s + output_to)
else:
refund_txn = self.calltx('-btcmode -create nversion=2' + prevout_s + output_to)
if offer.lock_type == ABS_LOCK_BLOCKS or offer.lock_type == ABS_LOCK_TIME:
refund_txn = self.calltx('{} locktime={}'.format(refund_txn, lock_value))
options = {}
if self.coin_clients[coin_type]['use_segwit']:
options['force_segwit'] = True
refund_sig = self.callcoinrpc(Coins.PART, 'createsignaturewithkey', [refund_txn, prevout, privkey, 'ALL', options])
if coin_type == Coins.PART or self.coin_clients[coin_type]['use_segwit']:
witness_stack = [
refund_sig,
pubkey.hex(),
'', # SCRIPT_VERIFY_MINIMALIF
txn_script.hex()]
refund_txn = self.calltx(refund_txn + ' witness=0:' + ':'.join(witness_stack))
else:
script = format(len(refund_sig) // 2, '02x') + refund_sig
script += format(33, '02x') + pubkey.hex()
script += format(OpCodes.OP_0, '02x')
script += format(OpCodes.OP_PUSHDATA1, '02x') + format(len(txn_script), '02x') + txn_script.hex()
refund_txn = self.calltx(refund_txn + ' scriptsig=0:' + script)
ro = self.callcoinrpc(Coins.PART, 'verifyrawtransaction', [refund_txn, [prevout]])
assert(ro['inputs_valid'] is True), 'inputs_valid is false'
assert(ro['complete'] is True), 'complete is false'
assert(ro['validscripts'] == 1), 'validscripts != 1'
if self.debug:
# Check fee
if self.coin_clients[coin_type]['connection_type'] == 'rpc':
refund_txjs = self.callcoinrpc(coin_type, 'decoderawtransaction', [refund_txn])
self.log.debug('vsize paid, actual vsize %d %d', tx_vsize, refund_txjs['vsize'])
assert(tx_vsize >= refund_txjs['vsize']), 'underpaid fee'
refund_txjs = self.callcoinrpc(Coins.PART, 'decoderawtransaction', [refund_txn])
self.log.debug('Have valid refund txn %s for contract tx %s', refund_txjs['txid'], txjs['txid'])
return refund_txn
def submitTxn(self, coin_type, txn):
# self.log.debug('submitTxn %s', str(coin_type))
if txn is None:
return None
if self.coin_clients[coin_type]['connection_type'] != 'rpc':
return None
return self.callcoinrpc(coin_type, 'sendrawtransaction', [txn])
def initiateTxnConfirmed(self, bid_id, bid, offer):
self.log.debug('initiateTxnConfirmed for bid %s', bid_id.hex())
bid.setState(BidStates.SWAP_INITIATED)
bid.setITxState(TxStates.TX_CONFIRMED)
# Seller first mode, buyer participates
participate_script = self.deriveParticipateScript(bid_id, bid, offer)
if bid.was_sent:
self.log.debug('Preparing participate txn for bid %s', bid_id.hex())
coin_to = Coins(offer.coin_to)
txn = self.createParticipateTxn(bid_id, bid, offer, participate_script)
txid = self.submitTxn(coin_to, txn)
self.log.debug('Submitted participate txn %s to %s chain for bid %s', txid, chainparams[coin_to]['name'], bid_id.hex())
bid.setPTxState(TxStates.TX_SENT)
else:
bid.participate_tx = SwapTx(
bid_id=bid_id,
tx_type=TxTypes.PTX,
script=participate_script,
)
# bid saved in checkBidState
def setLastHeightChecked(self, coin_type, tx_height):
chain_name = chainparams[coin_type]['name']
if tx_height < 1:
tx_height = self.lookupChainHeight(coin_type)
if len(self.coin_clients[coin_type]['watched_outputs']) == 0:
self.coin_clients[coin_type]['last_height_checked'] = tx_height
self.log.debug('Start checking %s chain at height %d', chain_name, tx_height)
if self.coin_clients[coin_type]['last_height_checked'] > tx_height:
self.coin_clients[coin_type]['last_height_checked'] = tx_height
self.log.debug('Rewind checking of %s chain to height %d', chain_name, tx_height)
return tx_height
def addParticipateTxn(self, bid_id, bid, coin_type, txid_hex, vout, tx_height):
# TODO: Check connection type
participate_txn_height = self.setLastHeightChecked(coin_type, tx_height)
if bid.participate_tx is None:
bid.participate_tx = SwapTx(
bid_id=bid_id,
tx_type=TxTypes.PTX,
)
bid.participate_tx.txid = bytes.fromhex(txid_hex)
bid.participate_tx.vout = vout
bid.participate_tx.chain_height = participate_txn_height
# Start checking for spends of participate_txn before fully confirmed
self.log.debug('Watching %s chain for spend of output %s %d', chainparams[coin_type]['name'], txid_hex, vout)
self.addWatchedOutput(coin_type, bid_id, txid_hex, vout, BidStates.SWAP_PARTICIPATING)
def participateTxnConfirmed(self, bid_id, bid, offer):
self.log.debug('participateTxnConfirmed for bid %s', bid_id.hex())
bid.setState(BidStates.SWAP_PARTICIPATING)
bid.setPTxState(TxStates.TX_CONFIRMED)
# Seller redeems from participate txn
if bid.was_received:
coin_to = Coins(offer.coin_to)
txn = self.createRedeemTxn(coin_to, bid)
txid = self.submitTxn(coin_to, txn)
self.log.debug('Submitted participate redeem txn %s to %s chain for bid %s', txid, chainparams[coin_to]['name'], bid_id.hex())
# TX_REDEEMED will be set when spend is detected
# TODO: Wait for depth?
# bid saved in checkBidState
def lookupChainHeight(self, coin_type):
return self.callcoinrpc(coin_type, 'getblockchaininfo')['blocks']
def lookupUnspentByAddress(self, coin_type, address, sum_output=False, assert_amount=None, assert_txid=None):
num_blocks = self.callcoinrpc(coin_type, 'getblockchaininfo')['blocks']
sum_unspent = 0
self.log.debug('[rm] scantxoutset start') # scantxoutset is slow
ro = self.callcoinrpc(coin_type, 'scantxoutset', ['start', ['addr({})'.format(address)]])
self.log.debug('[rm] scantxoutset end')
for o in ro['unspents']:
if assert_txid and o['txid'] != assert_txid:
continue
# Verify amount
if assert_amount:
assert(int(o['amount'] * COIN) == int(assert_amount)), 'Incorrect output amount in txn {}.'.format(assert_txid)
if not sum_output:
if o['height'] > 0:
n_conf = num_blocks - o['height']
else:
n_conf = -1
return {
'txid': o['txid'],
'index': o['vout'],
'height': o['height'],
'n_conf': n_conf,
}
else:
sum_unspent += o['amount'] * COIN
if sum_output:
return sum_unspent
return None
def checkBidState(self, bid_id, bid, offer):
# assert(self.mxDB.locked())
# Return True to remove bid from in-progress list
state = BidStates(bid.state)
self.log.debug('checkBidState %s %s', bid_id.hex(), str(state))
save_bid = False
coin_from = Coins(offer.coin_from)
coin_to = Coins(offer.coin_to)
# TODO: Batch calls to scantxoutset
# TODO: timeouts
if state == BidStates.BID_ACCEPTED:
# Waiting for initiate txn to be confirmed in 'from' chain
initiate_txnid_hex = bid.initiate_tx.txid.hex()
p2sh = self.getScriptAddress(coin_from, bid.initiate_tx.script)
index = None
tx_height = None
last_initiate_txn_conf = bid.initiate_tx.conf
if coin_from == Coins.PART: # Has txindex
try:
initiate_txn = self.callcoinrpc(coin_from, 'getrawtransaction', [initiate_txnid_hex, True])
# Verify amount
vout = getVoutByAddress(initiate_txn, p2sh)
assert(int(initiate_txn['vout'][vout]['value'] * COIN) == int(bid.amount)), 'Incorrect output amount in initiate txn.'
bid.initiate_tx.conf = initiate_txn['confirmations']
try:
tx_height = initiate_txn['height']
except Exception:
tx_height = -1
index = vout
except Exception:
pass
else:
if self.coin_clients[coin_from]['use_segwit']:
addr = self.encodeSegwitP2WSH(coin_from, getP2WSH(bid.initiate_tx.script))
else:
addr = p2sh
found = self.lookupUnspentByAddress(coin_from, addr, assert_amount=bid.amount, assert_txid=initiate_txnid_hex)
if found:
bid.initiate_tx.conf = found['n_conf']
index = found['index']
tx_height = found['height']
if bid.initiate_tx.conf != last_initiate_txn_conf:
save_bid = True
if bid.initiate_tx.conf is not None:
self.log.debug('initiate_txnid %s confirms %d', initiate_txnid_hex, bid.initiate_tx.conf)
if bid.initiate_tx.vout is None:
bid.initiate_tx.vout = index
# Start checking for spends of initiate_txn before fully confirmed
bid.initiate_tx.chain_height = self.setLastHeightChecked(coin_from, tx_height)
self.addWatchedOutput(coin_from, bid_id, initiate_txnid_hex, bid.initiate_tx.vout, BidStates.SWAP_INITIATED)
if bid.getITxState() is None or bid.getITxState() < TxStates.TX_SENT:
bid.setITxState(TxStates.TX_SENT)
save_bid = True
if bid.initiate_tx.conf >= self.coin_clients[coin_from]['blocks_confirmed']:
self.initiateTxnConfirmed(bid_id, bid, offer)
save_bid = True
# Bid times out if buyer doesn't see tx in chain within INITIATE_TX_TIMEOUT seconds
if bid.initiate_tx is None and \
bid.state_time + INITIATE_TX_TIMEOUT < int(time.time()):
self.log.info('Swap timed out waiting for initiate tx for bid %s', bid_id.hex())
bid.setState(BidStates.SWAP_TIMEDOUT)
self.saveBid(bid_id, bid)
return True # Mark bid for archiving
elif state == BidStates.SWAP_INITIATED:
# Waiting for participate txn to be confirmed in 'to' chain
if self.coin_clients[coin_to]['use_segwit']:
addr = self.encodeSegwitP2WSH(coin_to, getP2WSH(bid.participate_tx.script))
else:
addr = self.getScriptAddress(coin_to, bid.participate_tx.script)
found = self.lookupUnspentByAddress(coin_to, addr, assert_amount=bid.amount_to)
if found:
if bid.participate_tx.conf != found['n_conf']:
save_bid = True
bid.participate_tx.conf = found['n_conf']
index = found['index']
if bid.participate_tx is None or bid.participate_tx.txid is None:
self.log.debug('Found bid %s participate txn %s in chain %s', bid_id.hex(), found['txid'], coin_to)
self.addParticipateTxn(bid_id, bid, coin_to, found['txid'], found['index'], found['height'])
bid.setPTxState(TxStates.TX_SENT)
save_bid = True
if bid.participate_tx.conf is not None:
self.log.debug('participate txid %s confirms %d', bid.participate_tx.txid.hex(), bid.participate_tx.conf)
if bid.participate_tx.conf >= self.coin_clients[coin_to]['blocks_confirmed']:
self.participateTxnConfirmed(bid_id, bid, offer)
save_bid = True
elif state == BidStates.SWAP_PARTICIPATING:
# Waiting for initiate txn spend
pass
else:
self.log.warning('checkBidState unknown state %s', state)
if state > BidStates.BID_ACCEPTED:
# Wait for spend of all known swap txns
if (bid.getITxState() is None or bid.getITxState() >= TxStates.TX_REDEEMED) \
and (bid.getPTxState() is None or bid.getPTxState() >= TxStates.TX_REDEEMED):
self.log.info('Swap completed for bid %s', bid_id.hex())
if bid.getITxState() == TxStates.TX_REDEEMED:
self.returnAddressToPool(bid_id, TxTypes.ITX_REFUND)
else:
self.returnAddressToPool(bid_id, TxTypes.ITX_REDEEM)
if bid.getPTxState() == TxStates.TX_REDEEMED:
self.returnAddressToPool(bid_id, TxTypes.PTX_REFUND)
else:
self.returnAddressToPool(bid_id, TxTypes.PTX_REDEEM)
bid.setState(BidStates.SWAP_COMPLETED)
self.saveBid(bid_id, bid)
return True # Mark bid for archiving
if save_bid:
self.saveBid(bid_id, bid)
# Try refund, keep trying until sent tx is spent
if (bid.getITxState() == TxStates.TX_SENT or bid.getITxState() == TxStates.TX_CONFIRMED) \
and bid.initiate_txn_refund is not None:
try:
txid = self.submitTxn(coin_from, bid.initiate_txn_refund.hex())
self.log.debug('Submitted initiate refund txn %s to %s chain for bid %s', txid, chainparams[coin_from]['name'], bid_id.hex())
# State will update when spend is detected
except Exception as ex:
if 'non-BIP68-final (code 64)' not in str(ex) and 'non-final' not in str(ex):
self.log.warning('Error trying to submit initiate refund txn: %s', str(ex))
if (bid.getPTxState() == TxStates.TX_SENT or bid.getPTxState() == TxStates.TX_CONFIRMED) \
and bid.participate_txn_refund is not None:
try:
txid = self.submitTxn(coin_to, bid.participate_txn_refund.hex())
self.log.debug('Submitted participate refund txn %s to %s chain for bid %s', txid, chainparams[coin_to]['name'], bid_id.hex())
# State will update when spend is detected
except Exception as ex:
if 'non-BIP68-final (code 64)' not in str(ex) and 'non-final' not in str(ex):
self.log.warning('Error trying to submit participate refund txn: %s', str(ex))
return False # Bid is still active
def extractSecret(self, coin_type, bid, spend_in):
try:
if coin_type == Coins.PART or self.coin_clients[coin_type]['use_segwit']:
assert(len(spend_in['txinwitness']) == 5), 'Bad witness size'
return bytes.fromhex(spend_in['txinwitness'][2])
else:
script_sig = spend_in['scriptSig']['asm'].split(' ')
assert(len(script_sig) == 5), 'Bad witness size'
return bytes.fromhex(script_sig[2])
except Exception:
return None
def addWatchedOutput(self, coin_type, bid_id, txid_hex, vout, tx_type):
self.log.debug('Adding watched output %s bid %s tx %s type %s', coin_type, bid_id.hex(), txid_hex, tx_type)
self.coin_clients[coin_type]['watched_outputs'].append((bid_id, txid_hex, vout, tx_type))
def removeWatchedOutput(self, coin_type, bid_id, txid_hex):
# Remove all for bid if txid is None
self.log.debug('removeWatchedOutput %s %s %s', str(coin_type), bid_id.hex(), txid_hex)
old_len = len(self.coin_clients[coin_type]['watched_outputs'])
for i in range(old_len - 1, -1, -1):
wo = self.coin_clients[coin_type]['watched_outputs'][i]
if wo[0] == bid_id and (txid_hex is None or wo[1] == txid_hex):
del self.coin_clients[coin_type]['watched_outputs'][i]
self.log.debug('Removed watched output %s %s %s', str(coin_type), bid_id.hex(), wo[1])
def initiateTxnSpent(self, bid_id, spend_txid, spend_n, spend_txn):
self.log.debug('Bid %s initiate txn spent by %s %d', bid_id.hex(), spend_txid, spend_n)
if bid_id in self.swaps_in_progress:
bid = self.swaps_in_progress[bid_id][0]
offer = self.swaps_in_progress[bid_id][1]
bid.initiate_tx.spend_txid = bytes.fromhex(spend_txid)
bid.initiate_tx.spend_n = spend_n
spend_in = spend_txn['vin'][spend_n]
coin_from = Coins(offer.coin_from)
coin_to = Coins(offer.coin_to)
secret = self.extractSecret(coin_from, bid, spend_in)
if secret is None:
self.log.info('Bid %s initiate txn refunded by %s %d', bid_id.hex(), spend_txid, spend_n)
# TODO: Wait for depth?
bid.setITxState(TxStates.TX_REFUNDED)
else:
self.log.info('Bid %s initiate txn redeemed by %s %d', bid_id.hex(), spend_txid, spend_n)
# TODO: Wait for depth?
bid.setITxState(TxStates.TX_REDEEMED)
self.removeWatchedOutput(coin_from, bid_id, bid.initiate_tx.txid.hex())
self.saveBid(bid_id, bid)
def participateTxnSpent(self, bid_id, spend_txid, spend_n, spend_txn):
self.log.debug('Bid %s participate txn spent by %s %d', bid_id.hex(), spend_txid, spend_n)
# TODO: More SwapTypes
if bid_id in self.swaps_in_progress:
bid = self.swaps_in_progress[bid_id][0]
offer = self.swaps_in_progress[bid_id][1]
bid.participate_tx.spend_txid = bytes.fromhex(spend_txid)
bid.participate_tx.spend_n = spend_n
spend_in = spend_txn['vin'][spend_n]
coin_from = Coins(offer.coin_from)
coin_to = Coins(offer.coin_to)
secret = self.extractSecret(coin_to, bid, spend_in)
if secret is None:
self.log.info('Bid %s participate txn refunded by %s %d', bid_id.hex(), spend_txid, spend_n)
# TODO: Wait for depth?
bid.setPTxState(TxStates.TX_REFUNDED)
else:
self.log.debug('Secret %s extracted from participate spend %s %d', secret.hex(), spend_txid, spend_n)
bid.recovered_secret = secret
# TODO: Wait for depth?
bid.setPTxState(TxStates.TX_REDEEMED)
if bid.was_sent:
txn = self.createRedeemTxn(coin_from, bid, for_txn_type='initiate')
txid = self.submitTxn(coin_from, txn)
bid.initiate_tx.spend_txid = bytes.fromhex(txid)
# bid.initiate_txn_redeem = bytes.fromhex(txn) # Worth keeping?
self.log.debug('Submitted initiate redeem txn %s to %s chain for bid %s', txid, chainparams[coin_from]['name'], bid_id.hex())
# TODO: Wait for depth? new state SWAP_TXI_REDEEM_SENT?
self.removeWatchedOutput(coin_to, bid_id, bid.participate_tx.txid.hex())
self.saveBid(bid_id, bid)
def checkForSpends(self, coin_type, c):
# assert(self.mxDB.locked()) self.log.debug('checkForSpends %s', coin_type)
if coin_type == Coins.PART:
# TODO: batch getspentinfo
for o in c['watched_outputs']:
found_spend = None
try:
found_spend = self.callcoinrpc(Coins.PART, 'getspentinfo', [{'txid': o[1], 'index': o[2]}])
except Exception as ex:
if 'Unable to get spent info' not in str(ex):
self.log.warning('getspentinfo %s', str(ex))
if found_spend is not None:
self.log.debug('Found spend in spentindex %s %d in %s %d', o[1], o[2], found_spend['txid'], found_spend['index'])
bid_id = o[0]
spend_txid = found_spend['txid']
spend_n = found_spend['index']
spend_txn = self.callcoinrpc(Coins.PART, 'getrawtransaction', [spend_txid, True])
if o[3] == BidStates.SWAP_PARTICIPATING:
self.participateTxnSpent(bid_id, spend_txid, spend_n, spend_txn)
else:
self.initiateTxnSpent(bid_id, spend_txid, spend_n, spend_txn)
else:
chain_blocks = self.callcoinrpc(coin_type, 'getblockchaininfo')['blocks']
last_height_checked = c['last_height_checked']
self.log.debug('chain_blocks, last_height_checked %s %s', chain_blocks, last_height_checked)
while last_height_checked < chain_blocks:
block_hash = self.callcoinrpc(coin_type, 'getblockhash', [last_height_checked + 1])
block = self.callcoinrpc(coin_type, 'getblock', [block_hash, 2])
for tx in block['tx']:
for i, inp in enumerate(tx['vin']):
for o in c['watched_outputs']:
inp_txid = inp.get('txid', None)
if inp_txid is None: # Coinbase
continue
if inp_txid == o[1] and inp['vout'] == o[2]:
self.log.debug('Found spend from search %s %d in %s %d', o[1], o[2], tx['txid'], i)
bid_id = o[0]
if o[3] == BidStates.SWAP_PARTICIPATING:
self.participateTxnSpent(bid_id, tx['txid'], i, tx)
else:
self.initiateTxnSpent(bid_id, tx['txid'], i, tx)
last_height_checked += 1
if c['last_height_checked'] != last_height_checked:
c['last_height_checked'] = last_height_checked
self.setIntKV('last_height_checked_' + chainparams[coin_type]['name'], last_height_checked)
def expireMessages(self):
self.mxDB.acquire()
try:
now = int(time.time())
options = {'encoding': 'none'}
ro = self.callrpc('smsginbox', ['all', '', options])
for msg in ro['messages']:
expire_at = msg['sent'] + msg['daysretention'] * SMSG_SECONDS_IN_DAY
if expire_at < now:
options = {'encoding': 'none', 'delete': True}
del_msg = self.callrpc('smsg', [msg['msgid'], options])
# TODO: remove offers from db
self.last_checked_expired = now
finally:
self.mxDB.release()
def processOffer(self, msg):
assert(msg['to'] == self.network_addr), 'Offer received on wrong address'
offer_bytes = bytes.fromhex(msg['hex'][2:-2])
offer_data = OfferMessage()
offer_data.ParseFromString(offer_bytes)
# Validate data
now = int(time.time())
coin_from = Coins(offer_data.coin_from)
coin_to = Coins(offer_data.coin_to)
chain_from = chainparams[coin_from][self.chain]
assert(offer_data.coin_from != offer_data.coin_to), 'coin_from == coin_to'
self.validateOfferAmounts(coin_from, coin_to, offer_data.amount_from, offer_data.rate, offer_data.min_bid_amount)
self.validateOfferLockValue(coin_from, coin_to, offer_data.lock_type, offer_data.lock_value)
assert(offer_data.time_valid >= MIN_OFFER_VALID_TIME and offer_data.time_valid <= MAX_OFFER_VALID_TIME), 'Invalid time_valid'
assert(msg['sent'] + offer_data.time_valid >= now), 'Offer expired'
if offer_data.swap_type == SwapTypes.SELLER_FIRST:
assert(len(offer_data.proof_address) == 0), 'Unexpected data'
assert(len(offer_data.proof_signature) == 0), 'Unexpected data'
assert(len(offer_data.pkhash_seller) == 0), 'Unexpected data'
assert(len(offer_data.secret_hash) == 0), 'Unexpected data'
elif offer_data.swap_type == SwapTypes.BUYER_FIRST:
raise ValueError('TODO')
else:
raise ValueError('Unknown swap type {}.'.format(offer_data.swap_type))
offer_id = bytes.fromhex(msg['msgid'])
session = scoped_session(self.session_factory)
# Check for sent
existing_offer = self.getOffer(offer_id)
if existing_offer is None:
offer = Offer(
offer_id=offer_id,
coin_from=offer_data.coin_from,
coin_to=offer_data.coin_to,
amount_from=offer_data.amount_from,
rate=offer_data.rate,
min_bid_amount=offer_data.min_bid_amount,
time_valid=offer_data.time_valid,
lock_type=int(offer_data.lock_type),
lock_value=offer_data.lock_value,
swap_type=offer_data.swap_type,
addr_from=msg['from'],
created_at=msg['sent'],
expire_at=msg['sent'] + offer_data.time_valid,
was_sent=False)
offer.setState(OfferStates.OFFER_RECEIVED)
session.add(offer)
self.log.debug('Received new offer %s', offer_id.hex())
else:
existing_offer.setState(OfferStates.OFFER_RECEIVED)
session.add(existing_offer)
session.commit()
session.close()
session.remove()
def processBid(self, msg):
self.log.debug('Processing bid msg %s', msg['msgid'])
now = int(time.time())
bid_bytes = bytes.fromhex(msg['hex'][2:-2])
bid_data = BidMessage()
bid_data.ParseFromString(bid_bytes)
# Validate data
assert(len(bid_data.offer_msg_id) == 28), 'Bad offer_id length'
assert(bid_data.time_valid >= MIN_BID_VALID_TIME and bid_data.time_valid <= MAX_BID_VALID_TIME), 'Invalid time_valid'
offer_id = bid_data.offer_msg_id
offer = self.getOffer(offer_id, sent=True)
assert(offer and offer.was_sent), 'Unknown offerid'
assert(offer.state == OfferStates.OFFER_RECEIVED), 'Bad offer state'
assert(msg['to'] == offer.addr_from), 'Received on incorrect address'
assert(now <= offer.expire_at), 'Offer expired'
assert(bid_data.amount >= offer.min_bid_amount), 'Bid amount below minimum'
assert(now <= msg['sent'] + bid_data.time_valid), 'Bid expired'
# TODO: allow higher bids
# assert(bid_data.rate != offer['data'].rate), 'Bid rate mismatch'
coin_to = Coins(offer.coin_to)
swap_type = offer.swap_type
if swap_type == SwapTypes.SELLER_FIRST:
assert(len(bid_data.pkhash_buyer) == 20), 'Bad pkhash_buyer length'
# Verify proof of funds
bid_proof_address = replaceAddrPrefix(bid_data.proof_address, Coins.PART, self.chain)
mm = chainparams[coin_to]['message_magic']
passed = self.callcoinrpc(Coins.PART, 'verifymessage', [bid_proof_address, bid_data.proof_signature, bid_data.proof_address + '_swap_proof', mm])
assert(passed is True), 'Proof of funds signature invalid'
if self.coin_clients[coin_to]['use_segwit']:
addr_search = self.encodeSegwit(coin_to, decodeAddress(bid_data.proof_address)[1:])
else:
addr_search = bid_data.proof_address
sum_unspent = self.lookupUnspentByAddress(coin_to, addr_search, sum_output=True)
self.log.debug('Proof of funds %s %s', bid_data.proof_address, format8(sum_unspent))
assert(sum_unspent >= bid_data.amount), 'Proof of funds failed'
elif swap_type == SwapTypes.BUYER_FIRST:
raise ValueError('TODO')
else:
raise ValueError('Unknown swap type {}.'.format(swap_type))
bid_id = bytes.fromhex(msg['msgid'])
bid = self.getBid(bid_id)
if bid is None:
bid = Bid(
bid_id=bid_id,
offer_id=offer_id,
amount=bid_data.amount,
pkhash_buyer=bid_data.pkhash_buyer,
created_at=msg['sent'],
amount_to=(bid_data.amount * offer.rate) // COIN,
expire_at=msg['sent'] + bid_data.time_valid,
bid_addr=msg['from'],
was_received=True,
)
else:
bid.created_at = msg['sent']
bid.expire_at = msg['sent'] + bid_data.time_valid
bid.was_received = True
if len(bid_data.proof_address) > 0:
bid.proof_address = bid_data.proof_address
bid.setState(BidStates.BID_RECEIVED)
self.log.info('Received valid bid %s for offer %s', bid_id.hex(), bid_data.offer_msg_id.hex())
self.saveBid(bid_id, bid)
# Auto accept bid if set and no other non-abandoned bid for this order exists
if offer.auto_accept_bids:
if self.countAcceptedBids(offer_id) > 0:
self.log.info('Not auto accepting bid %s, already have', bid_id.hex())
else:
self.log.info('Auto accepting bid %s', bid_id.hex())
self.acceptBid(bid_id)
def processBidAccept(self, msg):
self.log.debug('Processing bid accepted msg %s', msg['msgid'])
now = int(time.time())
bid_accept_bytes = bytes.fromhex(msg['hex'][2:-2])
bid_accept_data = BidAcceptMessage()
bid_accept_data.ParseFromString(bid_accept_bytes)
assert(len(bid_accept_data.bid_msg_id) == 28), 'Bad bid_msg_id length'
assert(len(bid_accept_data.initiate_txid) == 32), 'Bad initiate_txid length'
assert(len(bid_accept_data.contract_script) < 100), 'Bad contract_script length'
self.log.debug('for bid %s', bid_accept_data.bid_msg_id.hex())
bid_id = bid_accept_data.bid_msg_id
bid, offer = self.getBidAndOffer(bid_id)
assert(bid is not None and bid.was_sent is True), 'Unknown bidid'
assert(offer), 'Offer not found ' + bid.offer_id.hex()
coin_from = Coins(offer.coin_from)
# assert(bid.expire_at > now), 'Bid expired' # How much time over to accept
if bid.state >= BidStates.BID_ACCEPTED:
if bid.was_received: # Sent to self
self.log.info('Received valid bid accept %s for bid %s sent to self', bid.accept_msg_id.hex(), bid_id.hex())
return
raise ValueError('Wrong bid state: {}'.format(str(BidStates(bid.state))))
use_csv = True if offer.lock_type < ABS_LOCK_BLOCKS else False
# TODO: Verify script without decoding?
decoded_script = self.callcoinrpc(Coins.PART, 'decodescript', [bid_accept_data.contract_script.hex()])
lock_check_op = 'OP_CHECKSEQUENCEVERIFY' if use_csv else 'OP_CHECKLOCKTIMEVERIFY'
prog = re.compile('OP_IF OP_SIZE 32 OP_EQUALVERIFY OP_SHA256 (\w+) OP_EQUALVERIFY OP_DUP OP_HASH160 (\w+) OP_ELSE (\d+) {} OP_DROP OP_DUP OP_HASH160 (\w+) OP_ENDIF OP_EQUALVERIFY OP_CHECKSIG'.format(lock_check_op))
rr = prog.match(decoded_script['asm'])
if not rr:
raise ValueError('Bad script')
scriptvalues = rr.groups()
assert(len(scriptvalues[0]) == 64), 'Bad secret_hash length'
assert(bytes.fromhex(scriptvalues[1]) == bid.pkhash_buyer), 'pkhash_buyer mismatch'
script_lock_value = int(scriptvalues[2])
if use_csv:
expect_sequence = getExpectedSequence(offer.lock_type, offer.lock_value, coin_from)
assert(script_lock_value == expect_sequence), 'sequence mismatch'
else:
if offer.lock_type == ABS_LOCK_BLOCKS:
self.log.warning('TODO: validate absolute lock values')
else:
assert(script_lock_value <= bid.created_at + offer.lock_value + INITIATE_TX_TIMEOUT), 'script lock time too high'
assert(script_lock_value >= bid.created_at + offer.lock_value), 'script lock time too low'
assert(len(scriptvalues[3]) == 40), 'pkhash_refund bad length'
assert(bid.accept_msg_id is None), 'Bid already accepted'
bid.accept_msg_id = bytes.fromhex(msg['msgid'])
bid.initiate_tx = SwapTx(
bid_id=bid_id,
tx_type=TxTypes.ITX,
txid=bid_accept_data.initiate_txid,
script=bid_accept_data.contract_script,
)
bid.pkhash_seller = bytes.fromhex(scriptvalues[3])
bid.setState(BidStates.BID_ACCEPTED)
bid.setITxState(TxStates.TX_NONE)
self.log.info('Received valid bid accept %s for bid %s', bid.accept_msg_id.hex(), bid_id.hex())
self.saveBid(bid_id, bid)
self.swaps_in_progress[bid_id] = (bid, offer)
def processMsg(self, msg):
self.mxDB.acquire()
try:
msg_type = int(msg['hex'][:2], 16)
rv = None
if msg_type == MessageTypes.OFFER:
self.processOffer(msg)
elif msg_type == MessageTypes.BID:
self.processBid(msg)
elif msg_type == MessageTypes.BID_ACCEPT:
self.processBidAccept(msg)
except Exception as ex:
self.log.error('processMsg %s', str(ex))
traceback.print_exc()
finally:
self.mxDB.release()
def processZmqSmsg(self):
message = self.zmqSubscriber.recv()
clear = self.zmqSubscriber.recv()
if message[0] == 3: # Paid smsg
return # TODO: switch to paid?
msg_id = message[2:]
options = {'encoding': 'hex', 'setread': True}
msg = self.callrpc('smsg', [msg_id.hex(), options])
self.processMsg(msg)
def update(self):
try:
# while True:
message = self.zmqSubscriber.recv(flags=zmq.NOBLOCK)
if message == b'smsg':
self.processZmqSmsg()
except zmq.Again as ex:
pass
except Exception as ex:
self.log.error('smsg zmq %s', str(ex))
traceback.print_exc()
self.mxDB.acquire()
try:
# TODO: Wait for blocks / txns, would need to check multiple coins
now = int(time.time())
if now - self.last_checked_progress > self.check_progress_seconds:
to_remove = []
for bid_id, v in self.swaps_in_progress.items():
try:
if self.checkBidState(bid_id, v[0], v[1]) is True:
to_remove.append(bid_id)
except Exception as ex:
self.log.error('checkBidState %s %s', bid_id.hex(), str(ex))
traceback.print_exc()
self.setBidError(bid_id, v[0], str(ex))
for bid_id in to_remove:
self.log.debug('Removing bid from in-progress: %s', bid_id.hex())
del self.swaps_in_progress[bid_id]
self.last_checked_progress = now
now = int(time.time())
if now - self.last_checked_watched > self.check_watched_seconds:
for k, c in self.coin_clients.items():
if len(c['watched_outputs']) > 0:
self.checkForSpends(k, c)
self.last_checked_watched = now
# Expire messages
if int(time.time()) - self.last_checked_expired > self.check_expired_seconds:
self.expireMessages()
except Exception as ex:
self.log.error('update %s', str(ex))
traceback.print_exc()
finally:
self.mxDB.release()
def getSummary(self, opts=None):
num_watched_outputs = 0
for c, v in self.coin_clients.items():
num_watched_outputs += len(v['watched_outputs'])
bids_sent = 0
bids_received = 0
q = self.engine.execute('SELECT was_sent, was_received, COUNT(*) FROM bids GROUP BY was_sent, was_received ')
for r in q:
if r[0]:
bids_sent += r[2]
if r[1]:
bids_received += r[2]
now = int(time.time())
q = self.engine.execute('SELECT COUNT(*) FROM offers WHERE expire_at > {}'.format(now)).first()
num_offers = q[0]
q = self.engine.execute('SELECT COUNT(*) FROM offers WHERE was_sent = 1'.format(now)).first()
num_sent_offers = q[0]
rv = {
'network': self.chain,
'num_swapping': len(self.swaps_in_progress),
'num_network_offers': num_offers,
'num_sent_offers': num_sent_offers,
'num_recv_bids': bids_received,
'num_sent_bids': bids_sent,
'num_watched_outputs': num_watched_outputs,
}
return rv
def getWalletInfo(self, coin):
blockchaininfo = self.callcoinrpc(coin, 'getblockchaininfo')
walletinfo = self.callcoinrpc(coin, 'getwalletinfo')
rv = {
'deposit_address': self.getCachedAddressForCoin(coin),
'name': chainparams[coin]['name'].capitalize(),
'blocks': blockchaininfo['blocks'],
'balance': format8(walletinfo.get('total_balance', walletinfo['balance']) * COIN),
'synced': '{0:.2f}'.format(round(blockchaininfo['verificationprogress'], 2)),
}
return rv
def getWalletsInfo(self, opts=None):
rv = {}
for c in Coins:
if self.coin_clients[c]['connection_type'] == 'rpc':
try:
rv[c] = self.getWalletInfo(c)
except Exception as ex:
rv[c] = {'name': chainparams[c]['name'].capitalize(), 'error': str(ex)}
return rv
def countAcceptedBids(self, offer_id=None):
self.mxDB.acquire()
try:
session = scoped_session(self.session_factory)
if offer_id:
q = self.engine.execute('SELECT COUNT(*) FROM bids WHERE state >= {} AND offer_id = x\'{}\''.format(BidStates.BID_ACCEPTED, offer_id.hex())).first()
else:
q = self.engine.execute('SELECT COUNT(*) FROM bids WHERE state >= {}'.format(BidStates.BID_ACCEPTED)).first()
return q[0]
finally:
session.close()
session.remove()
self.mxDB.release()
def listOffers(self, sent=False, filters={}):
self.mxDB.acquire()
try:
rv = []
now = int(time.time())
session = scoped_session(self.session_factory)
if sent:
q = session.query(Offer).filter(Offer.was_sent == True) # noqa E712
else:
q = session.query(Offer).filter(Offer.expire_at > now)
filter_coin_from = filters.get('coin_from', None)
if filter_coin_from and filter_coin_from > -1:
q = q.filter(Offer.coin_from == int(filter_coin_from))
filter_coin_to = filters.get('coin_to', None)
if filter_coin_to and filter_coin_to > -1:
q = q.filter(Offer.coin_to == int(filter_coin_to))
q = q.order_by(Offer.created_at.desc())
for row in q:
rv.append(row)
return rv
finally:
session.close()
session.remove()
self.mxDB.release()
def listBids(self, sent=False, offer_id=None, for_html=False):
self.mxDB.acquire()
try:
rv = []
now = int(time.time())
session = scoped_session(self.session_factory)
query_str = 'SELECT bids.created_at, bids.bid_id, bids.offer_id, bids.amount, bids.state, bids.was_received, tx1.state, tx2.state FROM bids ' + \
'LEFT JOIN transactions AS tx1 ON tx1.bid_id = bids.bid_id AND tx1.tx_type = {} '.format(TxTypes.ITX) + \
'LEFT JOIN transactions AS tx2 ON tx2.bid_id = bids.bid_id AND tx2.tx_type = {} '.format(TxTypes.PTX)
if offer_id is not None:
query_str += 'WHERE bids.offer_id = x\'{}\' '.format(offer_id.hex())
elif sent:
query_str += 'WHERE bids.was_sent = 1 '
else:
query_str += 'WHERE bids.was_received = 1 '
query_str += 'ORDER BY bids.created_at DESC'
q = self.engine.execute(query_str)
for row in q:
rv.append(row)
return rv
finally:
session.close()
session.remove()
self.mxDB.release()
def listSwapsInProgress(self, for_html=False):
self.mxDB.acquire()
try:
rv = []
for k, v in self.swaps_in_progress.items():
rv.append((k, v[0].offer_id.hex(), v[0].state))
return rv
finally:
self.mxDB.release()
def listWatchedOutputs(self):
self.mxDB.acquire()
try:
rv = []
rv_heights = []
for c, v in self.coin_clients.items():
if self.coin_clients[c]['connection_type'] == 'rpc':
rv_heights.append((c, v['last_height_checked']))
for o in v['watched_outputs']:
rv.append((c, o[0], o[1], o[2], o[3]))
return (rv, rv_heights)
finally:
self.mxDB.release()
def listSmsgAddresses(self, use_type_str):
use_type = MessageTypes.OFFER if use_type_str == 'offer' else MessageTypes.BID
self.mxDB.acquire()
try:
session = scoped_session(self.session_factory)
rv = []
q = self.engine.execute('SELECT addr FROM smsgaddresses WHERE use_type = {} ORDER BY addr_id DESC'.format(use_type))
for row in q:
rv.append(row[0])
return rv
finally:
session.close()
session.remove()
self.mxDB.release()
def callrpc(self, method, params=[], wallet=None):
return callrpc(self.coin_clients[Coins.PART]['rpcport'], self.coin_clients[Coins.PART]['rpcauth'], method, params, wallet)
def callcoinrpc(self, coin, method, params=[], wallet=None):
return callrpc(self.coin_clients[coin]['rpcport'], self.coin_clients[coin]['rpcauth'], method, params, wallet)
def calltx(self, cmd):
bindir = self.coin_clients[Coins.PART]['bindir']
command_tx = os.path.join(bindir, cfg.PARTICL_TX)
chainname = '' if self.chain == 'mainnet' else (' -' + self.chain)
args = command_tx + chainname + ' ' + cmd
p = subprocess.Popen(args, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
out = p.communicate()
if len(out[1]) > 0:
raise ValueError('TX error ' + str(out[1]))
return out[0].decode('utf-8').strip()
def callcoincli(self, coin_type, params, wallet=None):
bindir = self.coin_clients[coin_type]['bindir']
datadir = self.coin_clients[coin_type]['datadir']
command_cli = os.path.join(bindir, chainparams[coin_type]['name'] + '-cli' + ('.exe' if os.name == 'nt' else ''))
chainname = '' if self.chain == 'mainnet' else (' -' + self.chain)
args = command_cli + chainname + ' ' + '-datadir=' + datadir + ' ' + params
p = subprocess.Popen(args, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
out = p.communicate()
if len(out[1]) > 0:
raise ValueError('CLI error ' + str(out[1]))
return out[0].decode('utf-8').strip()