Host-customized fork of https://github.com/tecnovert/basicswap/
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104 lines
3.2 KiB
104 lines
3.2 KiB
# -*- 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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from basicswap.db import ( |
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Concepts, |
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) |
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from basicswap.util import ( |
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SerialiseNum, |
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) |
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from basicswap.util.script import ( |
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getP2WSH, |
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) |
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from basicswap.script import ( |
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OpCodes, |
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) |
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from basicswap.basicswap_util import ( |
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SwapTypes, |
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EventLogTypes, |
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) |
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from . import ProtocolInterface |
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INITIATE_TX_TIMEOUT = 40 * 60 # TODO: make variable per coin |
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ABS_LOCK_TIME_LEEWAY = 10 * 60 |
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def buildContractScript(lock_val, secret_hash, pkh_redeem, pkh_refund, op_lock=OpCodes.OP_CHECKSEQUENCEVERIFY): |
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script = bytearray([ |
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OpCodes.OP_IF, |
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OpCodes.OP_SIZE, |
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0x01, 0x20, # 32 |
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OpCodes.OP_EQUALVERIFY, |
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OpCodes.OP_SHA256, |
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0x20]) \ |
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+ secret_hash \ |
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+ bytearray([ |
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OpCodes.OP_EQUALVERIFY, |
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OpCodes.OP_DUP, |
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OpCodes.OP_HASH160, |
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0x14]) \ |
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+ pkh_redeem \ |
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+ bytearray([OpCodes.OP_ELSE, ]) \ |
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+ SerialiseNum(lock_val) \ |
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+ bytearray([ |
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op_lock, |
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OpCodes.OP_DROP, |
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OpCodes.OP_DUP, |
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OpCodes.OP_HASH160, |
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0x14]) \ |
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+ pkh_refund \ |
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+ bytearray([ |
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OpCodes.OP_ENDIF, |
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OpCodes.OP_EQUALVERIFY, |
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OpCodes.OP_CHECKSIG]) |
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return script |
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def extractScriptSecretHash(script): |
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return script[7:39] |
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def redeemITx(self, bid_id, session): |
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bid, offer = self.getBidAndOffer(bid_id, session) |
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ci_from = self.ci(offer.coin_from) |
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txn = self.createRedeemTxn(ci_from.coin_type(), bid, for_txn_type='initiate') |
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txid = ci_from.publishTx(bytes.fromhex(txn)) |
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bid.initiate_tx.spend_txid = bytes.fromhex(txid) |
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self.log.debug('Submitted initiate redeem txn %s to %s chain for bid %s', txid, ci_from.coin_name(), bid_id.hex()) |
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self.logEvent(Concepts.BID, bid_id, EventLogTypes.ITX_REDEEM_PUBLISHED, '', session) |
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class AtomicSwapInterface(ProtocolInterface): |
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swap_type = SwapTypes.SELLER_FIRST |
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def getFundedInitiateTxTemplate(self, ci, amount: int, sub_fee: bool) -> bytes: |
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script = self.getMockScript() |
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addr_to = ci.encode_p2wsh(getP2WSH(script)) if ci._use_segwit else ci.encode_p2sh(script) |
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funded_tx = ci.createRawFundedTransaction(addr_to, amount, sub_fee, lock_unspents=False) |
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return bytes.fromhex(funded_tx) |
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def promoteMockTx(self, ci, mock_tx: bytes, script: bytearray) -> bytearray: |
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mock_txo_script = self.getMockScriptScriptPubkey(ci) |
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real_txo_script = ci.get_p2wsh_script_pubkey(script) if ci._use_segwit else ci.get_p2sh_script_pubkey(script) |
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found: int = 0 |
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ctx = ci.loadTx(mock_tx) |
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for txo in ctx.vout: |
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if txo.scriptPubKey == mock_txo_script: |
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txo.scriptPubKey = real_txo_script |
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found += 1 |
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if found < 1: |
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raise ValueError('Mocked output not found') |
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if found > 1: |
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raise ValueError('Too many mocked outputs found') |
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ctx.nLockTime = 0 |
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funded_tx = ctx.serialize() |
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return ci.signTxWithWallet(funded_tx)
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