# -*- 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, makeInt, ) 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']: msg['hex'] += '00' # Add nullbtye to match output from 'smsg' cmd - TODO: make consistent 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(makeInt(o['amount']) == int(assert_amount)), 'Incorrect output amount in txn {}: {} != {}.'.format(assert_txid, makeInt(o['amount']), int(assert_amount)) 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) out_value = makeInt(initiate_txn['vout'][vout]['value']) assert(out_value == int(bid.amount)), 'Incorrect output amount in initiate txn {}: {} != {}.'.format(initiate_txnid_hex, out_value, int(bid.amount)) 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.log.debug('processMsg %s', msg['hex']) 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()