Host-customized fork of https://github.com/tecnovert/basicswap/
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858 lines
40 KiB
858 lines
40 KiB
#!/usr/bin/env python |
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# -*- coding: utf-8 -*- |
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# Copyright (c) 2020-2022 tecnovert |
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# Distributed under the MIT software license, see the accompanying |
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# file LICENSE or http://www.opensource.org/licenses/mit-license.php. |
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import hashlib |
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from enum import IntEnum |
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from basicswap.contrib.test_framework.messages import ( |
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CTxOutPart, |
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) |
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from basicswap.contrib.test_framework.script import ( |
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CScript, |
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OP_0, |
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OP_DUP, OP_HASH160, OP_EQUALVERIFY, OP_CHECKSIG |
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) |
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from basicswap.util import ( |
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i2b, |
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ensure, |
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make_int, |
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TemporaryError, |
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) |
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from basicswap.util.script import ( |
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getP2WSH, |
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getCompactSizeLen, |
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getWitnessElementLen, |
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) |
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from basicswap.util.address import ( |
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toWIF, |
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encodeStealthAddress) |
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from basicswap.chainparams import Coins, chainparams |
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from .btc import BTCInterface |
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class BalanceTypes(IntEnum): |
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PLAIN = 1 |
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BLIND = 2 |
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ANON = 3 |
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class PARTInterface(BTCInterface): |
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@staticmethod |
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def coin_type(): |
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return Coins.PART |
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@staticmethod |
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def balance_type(): |
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return BalanceTypes.PLAIN |
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@staticmethod |
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def witnessScaleFactor() -> int: |
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return 2 |
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@staticmethod |
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def txVersion() -> int: |
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return 0xa0 |
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@staticmethod |
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def xmr_swap_alock_spend_tx_vsize() -> int: |
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return 213 |
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@staticmethod |
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def txoType(): |
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return CTxOutPart |
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def __init__(self, coin_settings, network, swap_client=None): |
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super().__init__(coin_settings, network, swap_client) |
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self.setAnonTxRingSize(int(coin_settings.get('anon_tx_ring_size', 12))) |
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def setAnonTxRingSize(self, value): |
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ensure(value >= 3 and value < 33, 'Invalid anon_tx_ring_size value') |
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self._anon_tx_ring_size = value |
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def knownWalletSeed(self): |
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# TODO: Double check |
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return True |
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def getNewAddress(self, use_segwit, label='swap_receive'): |
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return self.rpc_callback('getnewaddress', [label]) |
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def getNewStealthAddress(self, label='swap_stealth'): |
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return self.rpc_callback('getnewstealthaddress', [label]) |
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def haveSpentIndex(self): |
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version = self.getDaemonVersion() |
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index_info = self.rpc_callback('getinsightinfo' if int(str(version)[:2]) > 19 else 'getindexinfo') |
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return index_info['spentindex'] |
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def initialiseWallet(self, key): |
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raise ValueError('TODO') |
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def withdrawCoin(self, value, addr_to, subfee): |
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params = [addr_to, value, '', '', subfee, '', True, self._conf_target] |
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return self.rpc_callback('sendtoaddress', params) |
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def sendTypeTo(self, type_from, type_to, value, addr_to, subfee): |
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params = [type_from, type_to, |
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[{'address': addr_to, 'amount': value, 'subfee': subfee}, ], |
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'', '', self._anon_tx_ring_size, 1, False, |
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{'conf_target': self._conf_target}] |
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return self.rpc_callback('sendtypeto', params) |
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def getScriptForPubkeyHash(self, pkh): |
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return CScript([OP_DUP, OP_HASH160, pkh, OP_EQUALVERIFY, OP_CHECKSIG]) |
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def formatStealthAddress(self, scan_pubkey, spend_pubkey): |
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prefix_byte = chainparams[self.coin_type()][self._network]['stealth_key_prefix'] |
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return encodeStealthAddress(prefix_byte, scan_pubkey, spend_pubkey) |
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def getWitnessStackSerialisedLength(self, witness_stack): |
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length = getCompactSizeLen(len(witness_stack)) |
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for e in witness_stack: |
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length += getWitnessElementLen(len(e) // 2) # hex -> bytes |
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return length |
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def getWalletRestoreHeight(self): |
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start_time = self.rpc_callback('getwalletinfo')['keypoololdest'] |
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blockchaininfo = self.rpc_callback('getblockchaininfo') |
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best_block = blockchaininfo['bestblockhash'] |
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chain_synced = round(blockchaininfo['verificationprogress'], 3) |
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if chain_synced < 1.0: |
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raise ValueError('{} chain isn\'t synced.'.format(self.coin_name())) |
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self._log.debug('Finding block at time: {}'.format(start_time)) |
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block_hash = self.rpc_callback('getblockhashafter', [start_time]) |
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block_header = self.rpc_callback('getblockheader', [block_hash]) |
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return block_header['height'] |
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class PARTInterfaceBlind(PARTInterface): |
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@staticmethod |
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def balance_type(): |
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return BalanceTypes.BLIND |
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def coin_name(self): |
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return super().coin_name() + ' Blind' |
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def getScriptLockTxNonce(self, data): |
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return hashlib.sha256(data + bytes('locktx', 'utf-8')).digest() |
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def getScriptLockRefundTxNonce(self, data): |
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return hashlib.sha256(data + bytes('lockrefundtx', 'utf-8')).digest() |
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def findOutputByNonce(self, tx_obj, nonce): |
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blinded_info = None |
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output_n = None |
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for txo in tx_obj['vout']: |
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if txo['type'] != 'blind': |
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continue |
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try: |
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blinded_info = self.rpc_callback('rewindrangeproof', [txo['rangeproof'], txo['valueCommitment'], nonce.hex()]) |
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output_n = txo['n'] |
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self.rpc_callback('rewindrangeproof', [txo['rangeproof'], txo['valueCommitment'], nonce.hex()]) |
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break |
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except Exception as e: |
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self._log.debug('Searching for locked output: {}'.format(str(e))) |
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continue |
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# Should not be possible for commitment not to match |
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v = self.rpc_callback('verifycommitment', [txo['valueCommitment'], blinded_info['blind'], blinded_info['amount']]) |
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ensure(v['result'] is True, 'verifycommitment failed') |
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return output_n, blinded_info |
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def createSCLockTx(self, value: int, script: bytearray, vkbv) -> bytes: |
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# Nonce is derived from vkbv, ephemeral_key isn't used |
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ephemeral_key = i2b(self.getNewSecretKey()) |
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ephemeral_pubkey = self.getPubkey(ephemeral_key) |
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assert (len(ephemeral_pubkey) == 33) |
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nonce = self.getScriptLockTxNonce(vkbv) |
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p2wsh_addr = self.encode_p2wsh(getP2WSH(script)) |
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inputs = [] |
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outputs = [{'type': 'blind', 'amount': self.format_amount(value), 'address': p2wsh_addr, 'nonce': nonce.hex(), 'data': ephemeral_pubkey.hex()}] |
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params = [inputs, outputs] |
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rv = self.rpc_callback('createrawparttransaction', params) |
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tx_bytes = bytes.fromhex(rv['hex']) |
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return tx_bytes |
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def fundSCLockTx(self, tx_bytes, feerate, vkbv): |
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feerate_str = self.format_amount(feerate) |
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# TODO: unlock unspents if bid cancelled |
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tx_hex = tx_bytes.hex() |
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nonce = self.getScriptLockTxNonce(vkbv) |
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tx_obj = self.rpc_callback('decoderawtransaction', [tx_hex]) |
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assert (len(tx_obj['vout']) == 1) |
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txo = tx_obj['vout'][0] |
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blinded_info = self.rpc_callback('rewindrangeproof', [txo['rangeproof'], txo['valueCommitment'], nonce.hex()]) |
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outputs_info = {0: {'value': blinded_info['amount'], 'blind': blinded_info['blind'], 'nonce': nonce.hex()}} |
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options = { |
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'lockUnspents': True, |
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'feeRate': feerate_str, |
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} |
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rv = self.rpc_callback('fundrawtransactionfrom', ['blind', tx_hex, {}, outputs_info, options]) |
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return bytes.fromhex(rv['hex']) |
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def createSCLockRefundTx(self, tx_lock_bytes, script_lock, Kal, Kaf, lock1_value, csv_val, tx_fee_rate, vkbv): |
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lock_tx_obj = self.rpc_callback('decoderawtransaction', [tx_lock_bytes.hex()]) |
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assert (self.getTxid(tx_lock_bytes).hex() == lock_tx_obj['txid']) |
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# Nonce is derived from vkbv, ephemeral_key isn't used |
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ephemeral_key = i2b(self.getNewSecretKey()) |
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ephemeral_pubkey = self.getPubkey(ephemeral_key) |
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assert (len(ephemeral_pubkey) == 33) |
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nonce = self.getScriptLockTxNonce(vkbv) |
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output_nonce = self.getScriptLockRefundTxNonce(vkbv) |
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# Find the output of the lock tx to spend |
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spend_n, input_blinded_info = self.findOutputByNonce(lock_tx_obj, nonce) |
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ensure(spend_n is not None, 'Output not found in tx') |
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locked_coin = input_blinded_info['amount'] |
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tx_lock_id = lock_tx_obj['txid'] |
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refund_script = self.genScriptLockRefundTxScript(Kal, Kaf, csv_val) |
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p2wsh_addr = self.encode_p2wsh(getP2WSH(refund_script)) |
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inputs = [{'txid': tx_lock_id, 'vout': spend_n, 'sequence': lock1_value, 'blindingfactor': input_blinded_info['blind']}] |
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outputs = [{'type': 'blind', 'amount': locked_coin, 'address': p2wsh_addr, 'nonce': output_nonce.hex(), 'data': ephemeral_pubkey.hex()}] |
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params = [inputs, outputs] |
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rv = self.rpc_callback('createrawparttransaction', params) |
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lock_refund_tx_hex = rv['hex'] |
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# Set dummy witness data for fee estimation |
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dummy_witness_stack = self.getScriptLockTxDummyWitness(script_lock) |
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# Use a junk change pubkey to avoid adding unused keys to the wallet |
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zero_change_key = i2b(self.getNewSecretKey()) |
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zero_change_pubkey = self.getPubkey(zero_change_key) |
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inputs_info = {'0': {'value': input_blinded_info['amount'], 'blind': input_blinded_info['blind'], 'witnessstack': dummy_witness_stack}} |
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outputs_info = rv['amounts'] |
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options = { |
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'changepubkey': zero_change_pubkey.hex(), |
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'feeRate': self.format_amount(tx_fee_rate), |
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'subtractFeeFromOutputs': [0, ] |
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} |
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rv = self.rpc_callback('fundrawtransactionfrom', ['blind', lock_refund_tx_hex, inputs_info, outputs_info, options]) |
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lock_refund_tx_hex = rv['hex'] |
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for vout, txo in rv['output_amounts'].items(): |
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if txo['value'] > 0: |
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refunded_value = txo['value'] |
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return bytes.fromhex(lock_refund_tx_hex), refund_script, refunded_value |
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def createSCLockRefundSpendTx(self, tx_lock_refund_bytes, script_lock_refund, pkh_refund_to, tx_fee_rate, vkbv): |
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# Returns the coinA locked coin to the leader |
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# The follower will sign the multisig path with a signature encumbered by the leader's coinB spend pubkey |
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# If the leader publishes the decrypted signature the leader's coinB spend privatekey will be revealed to the follower |
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lock_refund_tx_obj = self.rpc_callback('decoderawtransaction', [tx_lock_refund_bytes.hex()]) |
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# Nonce is derived from vkbv |
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nonce = self.getScriptLockRefundTxNonce(vkbv) |
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# Find the output of the lock refund tx to spend |
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spend_n, input_blinded_info = self.findOutputByNonce(lock_refund_tx_obj, nonce) |
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ensure(spend_n is not None, 'Output not found in tx') |
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tx_lock_refund_id = lock_refund_tx_obj['txid'] |
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addr_out = self.pkh_to_address(pkh_refund_to) |
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addr_info = self.rpc_callback('getaddressinfo', [addr_out]) |
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output_pubkey_hex = addr_info['pubkey'] |
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# Follower won't be able to decode output to check amount, shouldn't matter as fee is public and output is to leader, sum has to balance |
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inputs = [{'txid': tx_lock_refund_id, 'vout': spend_n, 'sequence': 0, 'blindingfactor': input_blinded_info['blind']}] |
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outputs = [{'type': 'blind', 'amount': input_blinded_info['amount'], 'address': addr_out, 'pubkey': output_pubkey_hex}] |
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params = [inputs, outputs] |
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rv = self.rpc_callback('createrawparttransaction', params) |
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lock_refund_spend_tx_hex = rv['hex'] |
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# Set dummy witness data for fee estimation |
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dummy_witness_stack = self.getScriptLockRefundSpendTxDummyWitness(script_lock_refund) |
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# Use a junk change pubkey to avoid adding unused keys to the wallet |
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zero_change_key = i2b(self.getNewSecretKey()) |
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zero_change_pubkey = self.getPubkey(zero_change_key) |
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inputs_info = {'0': {'value': input_blinded_info['amount'], 'blind': input_blinded_info['blind'], 'witnessstack': dummy_witness_stack}} |
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outputs_info = rv['amounts'] |
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options = { |
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'changepubkey': zero_change_pubkey.hex(), |
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'feeRate': self.format_amount(tx_fee_rate), |
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'subtractFeeFromOutputs': [0, ] |
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} |
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rv = self.rpc_callback('fundrawtransactionfrom', ['blind', lock_refund_spend_tx_hex, inputs_info, outputs_info, options]) |
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lock_refund_spend_tx_hex = rv['hex'] |
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return bytes.fromhex(lock_refund_spend_tx_hex) |
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def verifySCLockTx(self, tx_bytes, script_out, |
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swap_value, |
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Kal, Kaf, |
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feerate, |
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check_lock_tx_inputs, vkbv): |
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lock_tx_obj = self.rpc_callback('decoderawtransaction', [tx_bytes.hex()]) |
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lock_txid_hex = lock_tx_obj['txid'] |
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self._log.info('Verifying lock tx: {}.'.format(lock_txid_hex)) |
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ensure(lock_tx_obj['version'] == self.txVersion(), 'Bad version') |
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ensure(lock_tx_obj['locktime'] == 0, 'Bad nLockTime') |
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# Find the output of the lock tx to verify |
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nonce = self.getScriptLockTxNonce(vkbv) |
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lock_output_n, blinded_info = self.findOutputByNonce(lock_tx_obj, nonce) |
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ensure(lock_output_n is not None, 'Output not found in tx') |
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# Check value |
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locked_txo_value = make_int(blinded_info['amount']) |
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ensure(locked_txo_value == swap_value, 'Bad locked value') |
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# Check script |
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lock_txo_scriptpk = bytes.fromhex(lock_tx_obj['vout'][lock_output_n]['scriptPubKey']['hex']) |
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script_pk = CScript([OP_0, hashlib.sha256(script_out).digest()]) |
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ensure(lock_txo_scriptpk == script_pk, 'Bad output script') |
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A, B = self.extractScriptLockScriptValues(script_out) |
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ensure(A == Kal, 'Bad script leader pubkey') |
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ensure(B == Kaf, 'Bad script follower pubkey') |
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# TODO: Check that inputs are unspent, rangeproofs and commitments sum |
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# Verify fee rate |
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vsize = lock_tx_obj['vsize'] |
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fee_paid = make_int(lock_tx_obj['vout'][0]['ct_fee']) |
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fee_rate_paid = fee_paid * 1000 // vsize |
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self._log.info('tx amount, vsize, feerate: %ld, %ld, %ld', locked_txo_value, vsize, fee_rate_paid) |
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if not self.compareFeeRates(fee_rate_paid, feerate): |
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self._log.warning('feerate paid doesn\'t match expected: %ld, %ld', fee_rate_paid, feerate) |
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# TODO: Display warning to user |
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return bytes.fromhex(lock_txid_hex), lock_output_n |
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def verifySCLockRefundTx(self, tx_bytes, lock_tx_bytes, script_out, |
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prevout_id, prevout_n, prevout_seq, prevout_script, |
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Kal, Kaf, csv_val_expect, swap_value, feerate, vkbv): |
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lock_refund_tx_obj = self.rpc_callback('decoderawtransaction', [tx_bytes.hex()]) |
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lock_refund_txid_hex = lock_refund_tx_obj['txid'] |
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self._log.info('Verifying lock refund tx: {}.'.format(lock_refund_txid_hex)) |
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ensure(lock_refund_tx_obj['version'] == self.txVersion(), 'Bad version') |
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ensure(lock_refund_tx_obj['locktime'] == 0, 'Bad nLockTime') |
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ensure(len(lock_refund_tx_obj['vin']) == 1, 'tx doesn\'t have one input') |
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txin = lock_refund_tx_obj['vin'][0] |
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ensure(txin['sequence'] == prevout_seq, 'Bad input nSequence') |
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ensure(txin['scriptSig']['hex'] == '', 'Input scriptsig not empty') |
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ensure(txin['txid'] == prevout_id.hex() and txin['vout'] == prevout_n, 'Input prevout mismatch') |
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ensure(len(lock_refund_tx_obj['vout']) == 3, 'tx doesn\'t have three outputs') |
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# Find the output of the lock refund tx to verify |
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nonce = self.getScriptLockRefundTxNonce(vkbv) |
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lock_refund_output_n, blinded_info = self.findOutputByNonce(lock_refund_tx_obj, nonce) |
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ensure(lock_refund_output_n is not None, 'Output not found in tx') |
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lock_refund_txo_value = make_int(blinded_info['amount']) |
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# Check script |
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lock_refund_txo_scriptpk = bytes.fromhex(lock_refund_tx_obj['vout'][lock_refund_output_n]['scriptPubKey']['hex']) |
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script_pk = CScript([OP_0, hashlib.sha256(script_out).digest()]) |
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ensure(lock_refund_txo_scriptpk == script_pk, 'Bad output script') |
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A, B, csv_val, C = self.extractScriptLockRefundScriptValues(script_out) |
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ensure(A == Kal, 'Bad script pubkey') |
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ensure(B == Kaf, 'Bad script pubkey') |
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ensure(csv_val == csv_val_expect, 'Bad script csv value') |
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ensure(C == Kaf, 'Bad script pubkey') |
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# Check rangeproofs and commitments sum |
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lock_tx_obj = self.rpc_callback('decoderawtransaction', [lock_tx_bytes.hex()]) |
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prevout = lock_tx_obj['vout'][prevout_n] |
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prevtxns = [{'txid': prevout_id.hex(), 'vout': prevout_n, 'scriptPubKey': prevout['scriptPubKey']['hex'], 'amount_commitment': prevout['valueCommitment']}] |
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rv = self.rpc_callback('verifyrawtransaction', [tx_bytes.hex(), prevtxns]) |
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ensure(rv['outputs_valid'] is True, 'Invalid outputs') |
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ensure(rv['inputs_valid'] is True, 'Invalid inputs') |
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# Check value |
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fee_paid = make_int(lock_refund_tx_obj['vout'][0]['ct_fee']) |
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ensure(swap_value - lock_refund_txo_value == fee_paid, 'Bad output value') |
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# Check fee rate |
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dummy_witness_stack = self.getScriptLockTxDummyWitness(prevout_script) |
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witness_bytes = self.getWitnessStackSerialisedLength(dummy_witness_stack) |
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vsize = self.getTxVSize(self.loadTx(tx_bytes), add_witness_bytes=witness_bytes) |
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fee_rate_paid = fee_paid * 1000 // vsize |
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self._log.info('vsize, feerate: %ld, %ld', vsize, fee_rate_paid) |
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ensure(self.compareFeeRates(fee_rate_paid, feerate), 'Bad fee rate, expected: {}'.format(feerate)) |
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return bytes.fromhex(lock_refund_txid_hex), lock_refund_txo_value, lock_refund_output_n |
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def verifySCLockRefundSpendTx(self, tx_bytes, lock_refund_tx_bytes, |
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lock_refund_tx_id, prevout_script, |
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Kal, |
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prevout_n, prevout_value, feerate, vkbv): |
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lock_refund_spend_tx_obj = self.rpc_callback('decoderawtransaction', [tx_bytes.hex()]) |
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lock_refund_spend_txid_hex = lock_refund_spend_tx_obj['txid'] |
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self._log.info('Verifying lock refund spend tx: {}.'.format(lock_refund_spend_txid_hex)) |
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ensure(lock_refund_spend_tx_obj['version'] == self.txVersion(), 'Bad version') |
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ensure(lock_refund_spend_tx_obj['locktime'] == 0, 'Bad nLockTime') |
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ensure(len(lock_refund_spend_tx_obj['vin']) == 1, 'tx doesn\'t have one input') |
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txin = lock_refund_spend_tx_obj['vin'][0] |
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ensure(txin['sequence'] == 0, 'Bad input nSequence') |
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ensure(txin['scriptSig']['hex'] == '', 'Input scriptsig not empty') |
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ensure(txin['txid'] == lock_refund_tx_id.hex() and txin['vout'] == prevout_n, 'Input prevout mismatch') |
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ensure(len(lock_refund_spend_tx_obj['vout']) == 3, 'tx doesn\'t have three outputs') |
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# Leader picks output destinations |
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# Follower is not concerned with them as they pay to leader |
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# Check rangeproofs and commitments sum |
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lock_refund_tx_obj = self.rpc_callback('decoderawtransaction', [lock_refund_tx_bytes.hex()]) |
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prevout = lock_refund_tx_obj['vout'][prevout_n] |
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prevtxns = [{'txid': lock_refund_tx_id.hex(), 'vout': prevout_n, 'scriptPubKey': prevout['scriptPubKey']['hex'], 'amount_commitment': prevout['valueCommitment']}] |
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rv = self.rpc_callback('verifyrawtransaction', [tx_bytes.hex(), prevtxns]) |
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ensure(rv['outputs_valid'] is True, 'Invalid outputs') |
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ensure(rv['inputs_valid'] is True, 'Invalid inputs') |
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# Check fee rate |
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dummy_witness_stack = self.getScriptLockRefundSpendTxDummyWitness(prevout_script) |
|
witness_bytes = self.getWitnessStackSerialisedLength(dummy_witness_stack) |
|
vsize = self.getTxVSize(self.loadTx(tx_bytes), add_witness_bytes=witness_bytes) |
|
fee_paid = make_int(lock_refund_spend_tx_obj['vout'][0]['ct_fee']) |
|
fee_rate_paid = fee_paid * 1000 // vsize |
|
ensure(self.compareFeeRates(fee_rate_paid, feerate), 'Bad fee rate, expected: {}'.format(feerate)) |
|
|
|
return True |
|
|
|
def getLockTxSwapOutputValue(self, bid, xmr_swap): |
|
lock_tx_obj = self.rpc_callback('decoderawtransaction', [xmr_swap.a_lock_tx.hex()]) |
|
nonce = self.getScriptLockTxNonce(xmr_swap.vkbv) |
|
output_n, _ = self.findOutputByNonce(lock_tx_obj, nonce) |
|
ensure(output_n is not None, 'Output not found in tx') |
|
return bytes.fromhex(lock_tx_obj['vout'][output_n]['valueCommitment']) |
|
|
|
def getLockRefundTxSwapOutputValue(self, bid, xmr_swap): |
|
lock_refund_tx_obj = self.rpc_callback('decoderawtransaction', [xmr_swap.a_lock_refund_tx.hex()]) |
|
nonce = self.getScriptLockRefundTxNonce(xmr_swap.vkbv) |
|
output_n, _ = self.findOutputByNonce(lock_refund_tx_obj, nonce) |
|
ensure(output_n is not None, 'Output not found in tx') |
|
return bytes.fromhex(lock_refund_tx_obj['vout'][output_n]['valueCommitment']) |
|
|
|
def getLockRefundTxSwapOutput(self, xmr_swap): |
|
lock_refund_tx_obj = self.rpc_callback('decoderawtransaction', [xmr_swap.a_lock_refund_tx.hex()]) |
|
nonce = self.getScriptLockRefundTxNonce(xmr_swap.vkbv) |
|
output_n, _ = self.findOutputByNonce(lock_refund_tx_obj, nonce) |
|
ensure(output_n is not None, 'Output not found in tx') |
|
return output_n |
|
|
|
def createSCLockSpendTx(self, tx_lock_bytes, script_lock, pk_dest, tx_fee_rate, vkbv): |
|
lock_tx_obj = self.rpc_callback('decoderawtransaction', [tx_lock_bytes.hex()]) |
|
lock_txid_hex = lock_tx_obj['txid'] |
|
|
|
ensure(lock_tx_obj['version'] == self.txVersion(), 'Bad version') |
|
ensure(lock_tx_obj['locktime'] == 0, 'Bad nLockTime') |
|
|
|
# Find the output of the lock tx to verify |
|
nonce = self.getScriptLockTxNonce(vkbv) |
|
spend_n, blinded_info = self.findOutputByNonce(lock_tx_obj, nonce) |
|
ensure(spend_n is not None, 'Output not found in tx') |
|
|
|
addr_out = self.pubkey_to_address(pk_dest) |
|
|
|
inputs = [{'txid': lock_txid_hex, 'vout': spend_n, 'sequence': 0, 'blindingfactor': blinded_info['blind']}] |
|
outputs = [{'type': 'blind', 'amount': blinded_info['amount'], 'address': addr_out, 'pubkey': pk_dest.hex()}] |
|
params = [inputs, outputs] |
|
rv = self.rpc_callback('createrawparttransaction', params) |
|
lock_spend_tx_hex = rv['hex'] |
|
|
|
# Set dummy witness data for fee estimation |
|
dummy_witness_stack = self.getScriptLockTxDummyWitness(script_lock) |
|
|
|
# Use a junk change pubkey to avoid adding unused keys to the wallet |
|
zero_change_key = i2b(self.getNewSecretKey()) |
|
zero_change_pubkey = self.getPubkey(zero_change_key) |
|
inputs_info = {'0': {'value': blinded_info['amount'], 'blind': blinded_info['blind'], 'witnessstack': dummy_witness_stack}} |
|
outputs_info = rv['amounts'] |
|
options = { |
|
'changepubkey': zero_change_pubkey.hex(), |
|
'feeRate': self.format_amount(tx_fee_rate), |
|
'subtractFeeFromOutputs': [0, ] |
|
} |
|
|
|
rv = self.rpc_callback('fundrawtransactionfrom', ['blind', lock_spend_tx_hex, inputs_info, outputs_info, options]) |
|
lock_spend_tx_hex = rv['hex'] |
|
lock_spend_tx_obj = self.rpc_callback('decoderawtransaction', [lock_spend_tx_hex]) |
|
|
|
vsize = lock_spend_tx_obj['vsize'] |
|
pay_fee = make_int(lock_spend_tx_obj['vout'][0]['ct_fee']) |
|
actual_tx_fee_rate = pay_fee * 1000 // vsize |
|
self._log.info('createSCLockSpendTx %s:\n fee_rate, vsize, fee: %ld, %ld, %ld.', |
|
lock_spend_tx_obj['txid'], actual_tx_fee_rate, vsize, pay_fee) |
|
|
|
return bytes.fromhex(lock_spend_tx_hex) |
|
|
|
def verifySCLockSpendTx(self, tx_bytes, |
|
lock_tx_bytes, lock_tx_script, |
|
a_pk_f, feerate, vkbv): |
|
lock_spend_tx_obj = self.rpc_callback('decoderawtransaction', [tx_bytes.hex()]) |
|
lock_spend_txid_hex = lock_spend_tx_obj['txid'] |
|
self._log.info('Verifying lock spend tx: {}.'.format(lock_spend_txid_hex)) |
|
|
|
ensure(lock_spend_tx_obj['version'] == self.txVersion(), 'Bad version') |
|
ensure(lock_spend_tx_obj['locktime'] == 0, 'Bad nLockTime') |
|
ensure(len(lock_spend_tx_obj['vin']) == 1, 'tx doesn\'t have one input') |
|
|
|
lock_tx_obj = self.rpc_callback('decoderawtransaction', [lock_tx_bytes.hex()]) |
|
lock_txid_hex = lock_tx_obj['txid'] |
|
|
|
# Find the output of the lock tx to verify |
|
nonce = self.getScriptLockTxNonce(vkbv) |
|
spend_n, input_blinded_info = self.findOutputByNonce(lock_tx_obj, nonce) |
|
ensure(spend_n is not None, 'Output not found in tx') |
|
|
|
txin = lock_spend_tx_obj['vin'][0] |
|
ensure(txin['sequence'] == 0, 'Bad input nSequence') |
|
ensure(txin['scriptSig']['hex'] == '', 'Input scriptsig not empty') |
|
ensure(txin['txid'] == lock_txid_hex and txin['vout'] == spend_n, 'Input prevout mismatch') |
|
|
|
ensure(len(lock_spend_tx_obj['vout']) == 3, 'tx doesn\'t have three outputs') |
|
|
|
addr_out = self.pubkey_to_address(a_pk_f) |
|
privkey = self.rpc_callback('dumpprivkey', [addr_out]) |
|
|
|
# Find output: |
|
output_blinded_info = None |
|
output_n = None |
|
for txo in lock_spend_tx_obj['vout']: |
|
if txo['type'] != 'blind': |
|
continue |
|
try: |
|
output_blinded_info = self.rpc_callback('rewindrangeproof', [txo['rangeproof'], txo['valueCommitment'], privkey, txo['data_hex']]) |
|
output_n = txo['n'] |
|
break |
|
except Exception as e: |
|
self._log.debug('Searching for locked output: {}'.format(str(e))) |
|
pass |
|
ensure(output_n is not None, 'Output not found in tx') |
|
|
|
# Commitment |
|
v = self.rpc_callback('verifycommitment', [lock_spend_tx_obj['vout'][output_n]['valueCommitment'], output_blinded_info['blind'], output_blinded_info['amount']]) |
|
ensure(v['result'] is True, 'verifycommitment failed') |
|
|
|
# Check rangeproofs and commitments sum |
|
prevout = lock_tx_obj['vout'][spend_n] |
|
prevtxns = [{'txid': lock_txid_hex, 'vout': spend_n, 'scriptPubKey': prevout['scriptPubKey']['hex'], 'amount_commitment': prevout['valueCommitment']}] |
|
rv = self.rpc_callback('verifyrawtransaction', [tx_bytes.hex(), prevtxns]) |
|
ensure(rv['outputs_valid'] is True, 'Invalid outputs') |
|
ensure(rv['inputs_valid'] is True, 'Invalid inputs') |
|
|
|
# Check amount |
|
fee_paid = make_int(lock_spend_tx_obj['vout'][0]['ct_fee']) |
|
amount_difference = make_int(input_blinded_info['amount']) - make_int(output_blinded_info['amount']) |
|
ensure(fee_paid == amount_difference, 'Invalid output amount') |
|
|
|
# Check fee |
|
dummy_witness_stack = self.getScriptLockTxDummyWitness(lock_tx_script) |
|
witness_bytes = self.getWitnessStackSerialisedLength(dummy_witness_stack) |
|
|
|
vsize = self.getTxVSize(self.loadTx(tx_bytes), add_witness_bytes=witness_bytes) |
|
fee_rate_paid = fee_paid * 1000 // vsize |
|
self._log.info('vsize, feerate: %ld, %ld', vsize, fee_rate_paid) |
|
if not self.compareFeeRates(fee_rate_paid, feerate): |
|
raise ValueError('Bad fee rate, expected: {}'.format(feerate)) |
|
|
|
return True |
|
|
|
def createSCLockRefundSpendToFTx(self, tx_lock_refund_bytes, script_lock_refund, pkh_dest, tx_fee_rate, vkbv): |
|
# lock refund swipe tx |
|
# Sends the coinA locked coin to the follower |
|
lock_refund_tx_obj = self.rpc_callback('decoderawtransaction', [tx_lock_refund_bytes.hex()]) |
|
nonce = self.getScriptLockRefundTxNonce(vkbv) |
|
|
|
# Find the output of the lock refund tx to spend |
|
spend_n, input_blinded_info = self.findOutputByNonce(lock_refund_tx_obj, nonce) |
|
ensure(spend_n is not None, 'Output not found in tx') |
|
|
|
tx_lock_refund_id = lock_refund_tx_obj['txid'] |
|
addr_out = self.pkh_to_address(pkh_dest) |
|
addr_info = self.rpc_callback('getaddressinfo', [addr_out]) |
|
output_pubkey_hex = addr_info['pubkey'] |
|
|
|
A, B, lock2_value, C = self.extractScriptLockRefundScriptValues(script_lock_refund) |
|
|
|
# Follower won't be able to decode output to check amount, shouldn't matter as fee is public and output is to leader, sum has to balance |
|
|
|
inputs = [{'txid': tx_lock_refund_id, 'vout': spend_n, 'sequence': lock2_value, 'blindingfactor': input_blinded_info['blind']}] |
|
outputs = [{'type': 'blind', 'amount': input_blinded_info['amount'], 'address': addr_out, 'pubkey': output_pubkey_hex}] |
|
params = [inputs, outputs] |
|
rv = self.rpc_callback('createrawparttransaction', params) |
|
|
|
lock_refund_swipe_tx_hex = rv['hex'] |
|
|
|
# Set dummy witness data for fee estimation |
|
dummy_witness_stack = self.getScriptLockRefundSwipeTxDummyWitness(script_lock_refund) |
|
|
|
# Use a junk change pubkey to avoid adding unused keys to the wallet |
|
zero_change_key = i2b(self.getNewSecretKey()) |
|
zero_change_pubkey = self.getPubkey(zero_change_key) |
|
inputs_info = {'0': {'value': input_blinded_info['amount'], 'blind': input_blinded_info['blind'], 'witnessstack': dummy_witness_stack}} |
|
outputs_info = rv['amounts'] |
|
options = { |
|
'changepubkey': zero_change_pubkey.hex(), |
|
'feeRate': self.format_amount(tx_fee_rate), |
|
'subtractFeeFromOutputs': [0, ] |
|
} |
|
|
|
rv = self.rpc_callback('fundrawtransactionfrom', ['blind', lock_refund_swipe_tx_hex, inputs_info, outputs_info, options]) |
|
lock_refund_swipe_tx_hex = rv['hex'] |
|
|
|
return bytes.fromhex(lock_refund_swipe_tx_hex) |
|
|
|
def getSpendableBalance(self): |
|
return self.make_int(self.rpc_callback('getbalances')['mine']['blind_trusted']) |
|
|
|
def publishBLockTx(self, vkbv, Kbs, output_amount, feerate, delay_for: int = 10, unlock_time: int = 0) -> bytes: |
|
Kbv = self.getPubkey(vkbv) |
|
sx_addr = self.formatStealthAddress(Kbv, Kbs) |
|
self._log.debug('sx_addr: {}'.format(sx_addr)) |
|
|
|
# TODO: Fund from other balances |
|
params = ['blind', 'blind', |
|
[{'address': sx_addr, 'amount': self.format_amount(output_amount)}, ], |
|
'', '', self._anon_tx_ring_size, 1, False, |
|
{'conf_target': self._conf_target, 'blind_watchonly_visible': True}] |
|
|
|
txid = self.rpc_callback('sendtypeto', params) |
|
return bytes.fromhex(txid) |
|
|
|
def findTxB(self, kbv, Kbs, cb_swap_value, cb_block_confirmed, restore_height, bid_sender): |
|
Kbv = self.getPubkey(kbv) |
|
sx_addr = self.formatStealthAddress(Kbv, Kbs) |
|
|
|
# Tx recipient must import the stealth address as watch only |
|
if bid_sender: |
|
cb_swap_value *= -1 |
|
else: |
|
addr_info = self.rpc_callback('getaddressinfo', [sx_addr]) |
|
if not addr_info['iswatchonly']: |
|
wif_prefix = self.chainparams_network()['key_prefix'] |
|
wif_scan_key = toWIF(wif_prefix, kbv) |
|
self.rpc_callback('importstealthaddress', [wif_scan_key, Kbs.hex()]) |
|
self._log.info('Imported watch-only sx_addr: {}'.format(sx_addr)) |
|
self._log.info('Rescanning {} chain from height: {}'.format(self.coin_name(), restore_height)) |
|
self.rpc_callback('rescanblockchain', [restore_height]) |
|
|
|
params = [{'include_watchonly': True, 'search': sx_addr}] |
|
txns = self.rpc_callback('filtertransactions', params) |
|
|
|
if len(txns) == 1: |
|
tx = txns[0] |
|
assert (tx['outputs'][0]['stealth_address'] == sx_addr) # Should not be possible |
|
ensure(tx['outputs'][0]['type'] == 'blind', 'Output is not anon') |
|
|
|
if make_int(tx['outputs'][0]['amount']) == cb_swap_value: |
|
height = 0 |
|
if tx['confirmations'] > 0: |
|
chain_height = self.rpc_callback('getblockcount') |
|
height = chain_height - (tx['confirmations'] - 1) |
|
return {'txid': tx['txid'], 'amount': cb_swap_value, 'height': height} |
|
else: |
|
self._log.warning('Incorrect amount detected for coin b lock txn: {}'.format(tx['txid'])) |
|
return -1 |
|
return None |
|
|
|
def spendBLockTx(self, chain_b_lock_txid, address_to, kbv, kbs, cb_swap_value, b_fee, restore_height, spend_actual_balance=False): |
|
Kbv = self.getPubkey(kbv) |
|
Kbs = self.getPubkey(kbs) |
|
sx_addr = self.formatStealthAddress(Kbv, Kbs) |
|
addr_info = self.rpc_callback('getaddressinfo', [sx_addr]) |
|
if not addr_info['ismine']: |
|
wif_prefix = self.chainparams_network()['key_prefix'] |
|
wif_scan_key = toWIF(wif_prefix, kbv) |
|
wif_spend_key = toWIF(wif_prefix, kbs) |
|
self.rpc_callback('importstealthaddress', [wif_scan_key, wif_spend_key]) |
|
self._log.info('Imported spend key for sx_addr: {}'.format(sx_addr)) |
|
self._log.info('Rescanning {} chain from height: {}'.format(self.coin_name(), restore_height)) |
|
self.rpc_callback('rescanblockchain', [restore_height]) |
|
|
|
# TODO: Remove workaround |
|
# utxos = self.rpc_callback('listunspentblind', [1, 9999999, [sx_addr]]) |
|
utxos = [] |
|
all_utxos = self.rpc_callback('listunspentblind', [1, 9999999]) |
|
for utxo in all_utxos: |
|
if utxo.get('stealth_address', '_') == sx_addr: |
|
utxos.append(utxo) |
|
if len(utxos) < 1: |
|
raise TemporaryError('No spendable outputs') |
|
elif len(utxos) > 1: |
|
raise ValueError('Too many spendable outputs') |
|
|
|
utxo = utxos[0] |
|
utxo_sats = make_int(utxo['amount']) |
|
|
|
if spend_actual_balance and utxo_sats != cb_swap_value: |
|
self._log.warning('Spending actual balance {}, not swap value {}.'.format(utxo_sats, cb_swap_value)) |
|
cb_swap_value = utxo_sats |
|
|
|
inputs = [{'tx': utxo['txid'], 'n': utxo['vout']}, ] |
|
params = ['blind', 'blind', |
|
[{'address': address_to, 'amount': self.format_amount(cb_swap_value), 'subfee': True}, ], |
|
'', '', self._anon_tx_ring_size, 1, False, |
|
{'conf_target': self._conf_target, 'inputs': inputs, 'show_fee': True}] |
|
rv = self.rpc_callback('sendtypeto', params) |
|
return bytes.fromhex(rv['txid']) |
|
|
|
def findTxnByHash(self, txid_hex): |
|
# txindex is enabled for Particl |
|
|
|
try: |
|
rv = self.rpc_callback('getrawtransaction', [txid_hex, True]) |
|
except Exception as ex: |
|
self._log.debug('findTxnByHash getrawtransaction failed: {}'.format(txid_hex)) |
|
return None |
|
|
|
if 'confirmations' in rv and rv['confirmations'] >= self.blocks_confirmed: |
|
return {'txid': txid_hex, 'amount': 0, 'height': rv['height']} |
|
|
|
return None |
|
|
|
def createRawFundedTransaction(self, addr_to: str, amount: int, sub_fee: bool = False, lock_unspents: bool = True) -> str: |
|
txn = self.rpc_callback('createrawtransaction', [[], {addr_to: self.format_amount(amount)}]) |
|
|
|
options = { |
|
'lockUnspents': lock_unspents, |
|
'conf_target': self._conf_target, |
|
} |
|
if sub_fee: |
|
options['subtractFeeFromOutputs'] = [0,] |
|
return self.rpc_callback('fundrawtransactionfrom', ['blind', txn, options])['hex'] |
|
|
|
|
|
class PARTInterfaceAnon(PARTInterface): |
|
@staticmethod |
|
def balance_type(): |
|
return BalanceTypes.ANON |
|
|
|
@staticmethod |
|
def depth_spendable() -> int: |
|
return 12 |
|
|
|
def coin_name(self): |
|
return super().coin_name() + ' Anon' |
|
|
|
def publishBLockTx(self, kbv, Kbs, output_amount, feerate, delay_for: int = 10, unlock_time: int = 0) -> bytes: |
|
Kbv = self.getPubkey(kbv) |
|
sx_addr = self.formatStealthAddress(Kbv, Kbs) |
|
|
|
# TODO: Fund from other balances |
|
params = ['anon', 'anon', |
|
[{'address': sx_addr, 'amount': self.format_amount(output_amount)}, ], |
|
'', '', self._anon_tx_ring_size, 1, False, |
|
{'conf_target': self._conf_target, 'blind_watchonly_visible': True}] |
|
|
|
txid = self.rpc_callback('sendtypeto', params) |
|
return bytes.fromhex(txid) |
|
|
|
def findTxB(self, kbv, Kbs, cb_swap_value, cb_block_confirmed, restore_height, bid_sender): |
|
Kbv = self.getPubkey(kbv) |
|
sx_addr = self.formatStealthAddress(Kbv, Kbs) |
|
self._log.debug('sx_addr: {}'.format(sx_addr)) |
|
|
|
# Tx recipient must import the stealth address as watch only |
|
if bid_sender: |
|
cb_swap_value *= -1 |
|
else: |
|
addr_info = self.rpc_callback('getaddressinfo', [sx_addr]) |
|
if not addr_info['iswatchonly']: |
|
wif_prefix = self.chainparams_network()['key_prefix'] |
|
wif_scan_key = toWIF(wif_prefix, kbv) |
|
self.rpc_callback('importstealthaddress', [wif_scan_key, Kbs.hex()]) |
|
self._log.info('Imported watch-only sx_addr: {}'.format(sx_addr)) |
|
self._log.info('Rescanning {} chain from height: {}'.format(self.coin_name(), restore_height)) |
|
self.rpc_callback('rescanblockchain', [restore_height]) |
|
|
|
params = [{'include_watchonly': True, 'search': sx_addr}] |
|
txns = self.rpc_callback('filtertransactions', params) |
|
|
|
if len(txns) == 1: |
|
tx = txns[0] |
|
assert (tx['outputs'][0]['stealth_address'] == sx_addr) # Should not be possible |
|
ensure(tx['outputs'][0]['type'] == 'anon', 'Output is not anon') |
|
|
|
if make_int(tx['outputs'][0]['amount']) == cb_swap_value: |
|
height = 0 |
|
if tx['confirmations'] > 0: |
|
chain_height = self.rpc_callback('getblockcount') |
|
height = chain_height - (tx['confirmations'] - 1) |
|
return {'txid': tx['txid'], 'amount': cb_swap_value, 'height': height} |
|
else: |
|
self._log.warning('Incorrect amount detected for coin b lock txn: {}'.format(tx['txid'])) |
|
return -1 |
|
return None |
|
|
|
def spendBLockTx(self, chain_b_lock_txid, address_to, kbv, kbs, cb_swap_value, b_fee, restore_height, spend_actual_balance=False): |
|
Kbv = self.getPubkey(kbv) |
|
Kbs = self.getPubkey(kbs) |
|
sx_addr = self.formatStealthAddress(Kbv, Kbs) |
|
addr_info = self.rpc_callback('getaddressinfo', [sx_addr]) |
|
if not addr_info['ismine']: |
|
wif_prefix = self.chainparams_network()['key_prefix'] |
|
wif_scan_key = toWIF(wif_prefix, kbv) |
|
wif_spend_key = toWIF(wif_prefix, kbs) |
|
self.rpc_callback('importstealthaddress', [wif_scan_key, wif_spend_key]) |
|
self._log.info('Imported spend key for sx_addr: {}'.format(sx_addr)) |
|
self._log.info('Rescanning {} chain from height: {}'.format(self.coin_name(), restore_height)) |
|
self.rpc_callback('rescanblockchain', [restore_height]) |
|
|
|
autxos = self.rpc_callback('listunspentanon', [1, 9999999, [sx_addr]]) |
|
|
|
if len(autxos) < 1: |
|
raise TemporaryError('No spendable outputs') |
|
elif len(autxos) > 1: |
|
raise ValueError('Too many spendable outputs') |
|
|
|
utxo = autxos[0] |
|
utxo_sats = make_int(utxo['amount']) |
|
|
|
if spend_actual_balance and utxo_sats != cb_swap_value: |
|
self._log.warning('Spending actual balance {}, not swap value {}.'.format(utxo_sats, cb_swap_value)) |
|
cb_swap_value = utxo_sats |
|
|
|
inputs = [{'tx': utxo['txid'], 'n': utxo['vout']}, ] |
|
params = ['anon', 'anon', |
|
[{'address': address_to, 'amount': self.format_amount(cb_swap_value), 'subfee': True}, ], |
|
'', '', self._anon_tx_ring_size, 1, False, |
|
{'conf_target': self._conf_target, 'inputs': inputs, 'show_fee': True}] |
|
rv = self.rpc_callback('sendtypeto', params) |
|
return bytes.fromhex(rv['txid']) |
|
|
|
def findTxnByHash(self, txid_hex): |
|
# txindex is enabled for Particl |
|
|
|
try: |
|
rv = self.rpc_callback('getrawtransaction', [txid_hex, True]) |
|
except Exception as ex: |
|
self._log.debug('findTxnByHash getrawtransaction failed: {}'.format(txid_hex)) |
|
return None |
|
|
|
if 'confirmations' in rv and rv['confirmations'] >= self.blocks_confirmed: |
|
return {'txid': txid_hex, 'amount': 0, 'height': rv['height']} |
|
|
|
return None |
|
|
|
def getSpendableBalance(self): |
|
return self.make_int(self.rpc_callback('getbalances')['mine']['anon_trusted'])
|
|
|