parsec-node/src/tx/applyTx/checkExit.js

https://parseclabs.readthedocs.io/en/latest/

/**
 * Copyright (c) 2018-present, Parsec Labs (parseclabs.org)
 *
 * This source code is licensed under the Mozilla Public License Version 2.0
 * found in the LICENSE file in the root directory of this source tree.
 */

const { Type, Output } = require('parsec-lib');
const { addrCmp } = require('../../utils');

module.exports = (state, tx, bridgeState) => {
  if (tx.type !== Type.EXIT) {
    throw new Error('Exit tx expected');
  }

  if (!tx.inputs.length === 1) {
    throw new Error('Exit tx should have one input');
  }

  const [{ prevout }] = tx.inputs;
  const unspent = state.unspent[prevout.hex()];
  const exit = bridgeState.exits[prevout.getUtxoId()];
  if (
    !exit ||
    !addrCmp(exit.exitor, unspent.address) ||
    (Output.isNFT(Number(exit.color))
      ? exit.amount !== unspent.value
      : Number(exit.amount) !== unspent.value) ||
    Number(exit.color) !== unspent.color
  ) {
    throw new Error('Trying to submit incorrect exit');
  }
};