80 lines
2.7 KiB
JavaScript
80 lines
2.7 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.WebSocketProvider = void 0;
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const ws_js_1 = require("./ws.js"); /*-browser*/
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const provider_socket_js_1 = require("./provider-socket.js");
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/**
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* A JSON-RPC provider which is backed by a WebSocket.
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*
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* WebSockets are often preferred because they retain a live connection
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* to a server, which permits more instant access to events.
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*
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* However, this incurs higher server infrasturture costs, so additional
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* resources may be required to host your own WebSocket nodes and many
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* third-party services charge additional fees for WebSocket endpoints.
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*/
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class WebSocketProvider extends provider_socket_js_1.SocketProvider {
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#connect;
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#websocket;
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get websocket() {
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if (this.#websocket == null) {
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throw new Error("websocket closed");
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}
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return this.#websocket;
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}
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constructor(url, network) {
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super(network);
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if (typeof (url) === "string") {
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this.#connect = () => { return new ws_js_1.WebSocket(url); };
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this.#websocket = this.#connect();
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}
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else if (typeof (url) === "function") {
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this.#connect = url;
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this.#websocket = url();
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}
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else {
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this.#connect = null;
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this.#websocket = url;
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}
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this.websocket.onopen = async () => {
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try {
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await this._start();
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this.resume();
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}
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catch (error) {
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console.log("failed to start WebsocketProvider", error);
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// @TODO: now what? Attempt reconnect?
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}
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};
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this.websocket.onmessage = (message) => {
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this._processMessage(message.data);
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};
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/*
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this.websocket.onclose = (event) => {
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// @TODO: What event.code should we reconnect on?
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const reconnect = false;
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if (reconnect) {
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this.pause(true);
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if (this.#connect) {
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this.#websocket = this.#connect();
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this.#websocket.onopen = ...
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// @TODO: this requires the super class to rebroadcast; move it there
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}
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this._reconnect();
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}
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};
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*/
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}
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async _write(message) {
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this.websocket.send(message);
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}
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async destroy() {
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if (this.#websocket != null) {
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this.#websocket.close();
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this.#websocket = null;
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}
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super.destroy();
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}
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}
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exports.WebSocketProvider = WebSocketProvider;
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//# sourceMappingURL=provider-websocket.js.map
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