send-crypto/build/module/lib/promiEvent.js

A minimal JavaScript library / wallet for sending crypto assets

// Modified from web3-core-method
/*
    This file is part of web3.js.

    web3.js is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    web3.js is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with web3.js.  If not, see <http://www.gnu.org/licenses/>.
*/
/**
 * @file PromiEvent.js
 * @author Fabian Vogelsteller <fabian@ethereum.org>, Samuel Furter <samuel@ethereum.org>
 * @date 2018
 */
// tslint:disable: no-any
import { EventEmitter } from "events";
class InternalPromiEvent {
    [Symbol.toStringTag];
    promise;
    // @ts-ignore no initializer because of proxyHandler
    resolve;
    // @ts-ignore no initializer because of proxyHandler
    reject;
    eventEmitter;
    // @ts-ignore no initializer because of proxyHandler
    emit;
    // @ts-ignore no initializer because of proxyHandler
    removeListener;
    // @ts-ignore no initializer because of proxyHandler
    on;
    // @ts-ignore no initializer because of proxyHandler
    once;
    // @ts-ignore no initializer because of proxyHandler
    then;
    // @ts-ignore no initializer because of proxyHandler
    catch;
    // @ts-ignore no initializer because of proxyHandler
    finally;
    // @ts-ignore no initializer because of proxyHandler
    listeners;
    // @ts-ignore no initializer because of proxyHandler
    eventNames;
    /**
     * @constructor
     */
    constructor() {
        // tslint:disable-next-line: promise-must-complete
        this.promise = new Promise((resolve, reject) => {
            this.resolve = resolve;
            this.reject = reject;
        });
        this.eventEmitter = new EventEmitter();
        return new Proxy(this, {
            get: this.proxyHandler,
        });
    }
    /**
     * Proxy handler to call the promise or eventEmitter methods
     */
    proxyHandler(target, name) {
        if (name === "resolve" || name === "reject") {
            return target[name];
        }
        if (name === "then") {
            return target.promise.then.bind(target.promise);
        }
        if (name === "catch") {
            return target.promise.catch.bind(target.promise);
        }
        if (target.eventEmitter[name]) {
            return target.eventEmitter[name];
        }
    }
}
export const newPromiEvent = () => new InternalPromiEvent();
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