swtc-lib/src/wswrapper.js

websocket access for jingtum blockchain

import { EventEmitter } from "events";
class WSWrapper extends EventEmitter {
    constructor(url, _protocols, _websocketOptions) {
        super();
        this.setMaxListeners(Infinity);
        this._ws = new WebSocket(url);
        this._ws.onclose = () => {
            this.emit("close");
        };
        this._ws.onopen = () => {
            this.emit("open");
        };
        this._ws.onerror = error => {
            this.emit("error", error);
        };
        this._ws.onmessage = message => {
            this.emit("message", message.data);
        };
    }
    close() {
        if (this.readyState === 1) {
            this._ws.close();
        }
    }
    send(message) {
        this._ws.send(message);
    }
    get readyState() {
        return this._ws.readyState;
    }
}
WSWrapper.CONNECTING = 0;
WSWrapper.OPEN = 1;
WSWrapper.CLOSING = 2;
WSWrapper.CLOSED = 3;
export default WSWrapper;
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