@open-web3/api-mobx/rpc.js

MobX integration for polkadot.js

"use strict";

exports.__esModule = true;
exports.createMethodSubscribe = createMethodSubscribe;
exports.default = void 0;

var _util = require("@polkadot/util");

function createMethodSubscribe(ws, methods, params, callback) {
  const [updateType, subMethod, unsubMethod] = methods;
  let subscriptionPromise = Promise.resolve();

  const errorHandler = error => {
    callback(error);
  };

  try {
    const update = (error, result) => {
      if (error) {
        // errorHandler(error)
        return;
      }

      callback(undefined, result);
    };

    subscriptionPromise = ws.subscribe(updateType, subMethod, params, update).catch(error => errorHandler(error));
  } catch (error) {
    errorHandler(error);
  }

  return () => {
    subscriptionPromise.then(subscriptionId => (0, _util.isNumber)(subscriptionId) ? ws.unsubscribe(updateType, unsubMethod, subscriptionId) : Promise.resolve(false));
  };
}

function subscribeStorage(ws, callback) {
  return createMethodSubscribe(ws, ['state_storage', 'state_subscribeStorage', 'state_unsubscribeStorage'], [], callback);
}

var _default = subscribeStorage;
exports.default = _default;