@backt/protocol/lib/event-api.js

Backt smart contracts implementation

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _regenerator = require('babel-runtime/regenerator');

var _regenerator2 = _interopRequireDefault(_regenerator);

var _asyncToGenerator2 = require('babel-runtime/helpers/asyncToGenerator');

var _asyncToGenerator3 = _interopRequireDefault(_asyncToGenerator2);

var _classCallCheck2 = require('babel-runtime/helpers/classCallCheck');

var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);

var _createClass2 = require('babel-runtime/helpers/createClass');

var _createClass3 = _interopRequireDefault(_createClass2);

var _bluebird = require('bluebird');

var _bluebird2 = _interopRequireDefault(_bluebird);

var _contracts = require('./contracts');

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var EVENTAPI = function () {
  (0, _createClass3.default)(EVENTAPI, [{
    key: 'getAllTransactionsEvent',


    /**
     * Get all the transactions events for each contract passed in parameter
     * @param contracts A list of contracts
     * @param onSuccessCallback Callback receives list of events
     * @param onErrorCallback Callback receives error details on error
     */
    value: function getAllTransactionsEvent(contracts, onSuccessCallback, onErrorCallback) {
      var self = this;
      var transactions = [];
      var nbContracts = contracts.length;
      var nbContractDone = 0;
      // For each contract
      contracts.forEach(function (contract) {
        // Get all the events
        var events = self.cfd.at(contract.cfd.address).allEvents({ fromBlock: 0, toBlock: 'latest' });
        events.get(function (err, events) {
          // If we have at least one event, push them into the transactions array
          if (err == null && events != null && events !== undefined && events.length > 0) {
            events.forEach(function (e) {
              transactions.push(e);
            });
          }
          nbContractDone += 1;
          // Check if we are done with all the contracts
          if (nbContractDone >= nbContracts) {
            // Sort array by block number
            transactions.sort(function (a, b) {
              return b.blockNumber - a.blockNumber;
            });
            onSuccessCallback(transactions);
          }
        });
      });
    }

    /**
     * NOTE: use EVENTAPI.newInstance to create a new instance rather then this
     *       constructor.
     *
     * Construct an API instance setting config and web3. initialise() must be
     * called after this to setup the contract handler. newInstance() does both
     * these steps so is the preferred way to get an instance of this class.
     *
     * @param config Configuration object with all properties as per config.json.template
     * @param web3 Initiated web3 instance for the network to work with.
     */

  }], [{
    key: 'newInstance',

    /**
     * Create a new instance of this class setting up contract handles and
     * validiting the config addresses point to actual deployed contracts.
     *
     * @param config Configuration object with all properties as per
     *               config.json.template
     * @param web3 Initiated and connected web3 instance
     *
     * @return Constructed and initialised instance of this class
     */
    value: function () {
      var _ref = (0, _asyncToGenerator3.default)( /*#__PURE__*/_regenerator2.default.mark(function _callee(config, web3) {
        var api;
        return _regenerator2.default.wrap(function _callee$(_context) {
          while (1) {
            switch (_context.prev = _context.next) {
              case 0:
                if (!(web3.isConnected() !== true)) {
                  _context.next = 2;
                  break;
                }

                return _context.abrupt('return', _bluebird2.default.reject(new Error('web3 is not connected - check the endpoint')));

              case 2:
                api = new EVENTAPI(config, web3);
                _context.next = 5;
                return api.initialise();

              case 5:
                return _context.abrupt('return', api);

              case 6:
              case 'end':
                return _context.stop();
            }
          }
        }, _callee, this);
      }));

      function newInstance(_x, _x2) {
        return _ref.apply(this, arguments);
      }

      return newInstance;
    }()
  }]);

  function EVENTAPI(config, web3) {
    (0, _classCallCheck3.default)(this, EVENTAPI);

    this.config = config;
    this.web3 = web3;
    this.web3.eth.getCodeAsync = _bluebird2.default.promisify(this.web3.eth.getCode);
    this.web3.eth.getBlockAsync = _bluebird2.default.promisify(this.web3.eth.getBlock);
  }

  /**
   * NOTE: use newInstance() to create new instances rather then call this
   *       routine.
   *
   * Sets up contract handles and validiting the config addresses point to
   * actual deployed contracts. Seperate to the constructor as it needs to make
   * asynchronous calls.
   *
   * @return api instance
   */


  (0, _createClass3.default)(EVENTAPI, [{
    key: 'initialise',
    value: function () {
      var _ref2 = (0, _asyncToGenerator3.default)( /*#__PURE__*/_regenerator2.default.mark(function _callee2() {
        return _regenerator2.default.wrap(function _callee2$(_context2) {
          while (1) {
            switch (_context2.prev = _context2.next) {
              case 0:
                this.cfd = (0, _contracts.cfdInstance)(this.web3.currentProvider, this.config.ownerAccountAddr);
                return _context2.abrupt('return', this);

              case 2:
              case 'end':
                return _context2.stop();
            }
          }
        }, _callee2, this);
      }));

      function initialise() {
        return _ref2.apply(this, arguments);
      }

      return initialise;
    }()
  }]);
  return EVENTAPI;
}();

exports.default = EVENTAPI;