Host-customized fork of https://github.com/tecnovert/basicswap/
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# -*- coding: utf-8 -*-
# Copyright (c) 2020-2022 tecnovert
# Distributed under the MIT software license, see the accompanying
# file LICENSE or http://www.opensource.org/licenses/mit-license.php.
from basicswap.util import (
SerialiseNum,
)
from basicswap.script import (
OpCodes,
)
INITIATE_TX_TIMEOUT = 40 * 60 # TODO: make variable per coin
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 redeemITx(self, bid_id, session):
bid, offer = self.getBidAndOffer(bid_id, session)
ci_from = self.ci(offer.coin_from)
txn = self.createRedeemTxn(ci_from.coin_type(), bid, for_txn_type='initiate')
txid = self.submitTxn(ci_from.coin_type(), txn)
bid.initiate_tx.spend_txid = bytes.fromhex(txid)
self.log.debug('Submitted initiate redeem txn %s to %s chain for bid %s', txid, ci_from.coin_name(), bid_id.hex())