How to use rpc-websockets - 10 common examples

return new Promise((resolve, reject) => {
            this.address = this.node.wsAddress

            // For testing atom queueing during connection issues
            // if (Math.random() > 0.1) {
            //    this.address += 'garbage'
            // }

            logger.info(`Connecting to ${this.address}`)

            this._socket = new Client(this.address, { reconnect: false })

            this._socket.on('close', this._onClosed)

            this._socket.on('error', error => {
                logger.error(error)
                reject(error)
            })

            setTimeout(() => {
                if (!this._socket.ready) {
                    logger.debug('Socket timeout')
                    this._socket.close()
                    this.emit('closed')
                    reject('Timeout')
                }
            }, 5000)

constructor(public host: string, private ecdsaPrivateKey?: string) {
    // Simply create socket
    this._wsRPC = new WSClient(host)

    // If no privakey passed generate a random wallet
    this._wallet = ecdsaPrivateKey ? new Wallet(ecdsaPrivateKey) : Wallet.createRandom()

    // Emits new messages to the provider handler above (Web3)
    this._wsRPC.once('open', () => {
      ;((this._wsRPC as any).socket as EventEmitter).on(
        'message',
        this._onWebSocketMessage.bind(this)
      )
      ;((this._wsRPC as any).socket as WebSocket).onclose = () => {
        this.reset()
      }
    })

    // Prepare LoomProvider2 default methods

const connectedPromise = new Promise((resolve) => {
      log.info(
        `Connecting to Dart Observatory: ${dartObservatoryURL}`,
      );

      const socket = new Client(dartObservatoryURL);

      const removeListenerAndResolve = (r: NullableWebSocketDummy) => {
        socket.removeListener(`error`, onErrorListener);
        socket.removeListener(`timeout`, onTimeoutListener);
        socket.removeListener(`open`, onOpenListener);
        resolve(r);
      };

      // Add an 'error' event handler for the client socket
      const onErrorListener = (ex) => {
        log.error(ex);
        log.error(
          `Check Dart Observatory URI ${dartObservatoryURL}`,
        );
        removeListenerAndResolve(null);
      };

return new Promise((resolve, reject) => {
            // This is an independant websocket because 'getRemotePublicKey' is a static method
            const socket = new Client(`ws://${host}:${port}`)
            
            socket.on('open', () => {
                socket.call('get_public_key', { 
                    token,
                }).then((response) => {
                    resolve(response.data)
                }).catch((error) => {
                    reject(error)
                }).finally(() => {
                    socket.close()
                })
            })
        })
    }

constructor (backendVM, opts={}) {
    // setup the WebSocket server
    this.backendVM = backendVM
    this.server = new WebSocketServer({
      port: opts.port || DEFAULT_PORT
    })
    this.isReadyPromise = new Promise((resolve, reject) => {
      this.server.on('listening', resolve)
      this.server.on('error', reject)
    })

    // establish the method handlers
    this.registerCommands()
    this.callQueue = [] // backlog of RPC requests
    this.activeCall = null // call currently being processed
  }

listenWs: ({ host, port }) => {
      const wsServer = new WsJsonRpcServer({
        port: port || 8646,
        host: host || 'localhost',
      });

      // register an RPC method
      Object.keys(nodeApi).forEach(key => {
        wsServer.register(key.toString(), withParams(nodeApi[key]));
      });

      return new Promise(resolve => {
        wsServer.on('listening', () => {
          return resolve({
            address: wsServer.wss.options.host,
            port: wsServer.wss.options.port,
          });
        });

const WebSocket = require('rpc-websockets').Client;
const URL = 'ws://0.0.0.0:8080/v1';
const ws = new WebSocket(URL);



ws.on('open', function () {

  ws.call('getblocks', {limit: 10, offset: '0'})
    .then(function(result) {
      console.log('getblocks:', result);
    });

  ws.close();

});

private getSocketConnection(): Client {
        this.socket = new Client(this.remoteUrl)

        this.socket.on('error', (error) => logger.error(error))
        this.socket.on('close', () => logger.info('Socket closed'))

        return this.socket
    }

return new Promise((resolve, reject) => {
            const socket = new Client(`ws://${host}:${port}`)
            
            socket.on('open', () => resolve(true))

            setTimeout(() => {
                if (socket && socket.ready) {
                    socket.close()
                    resolve(true)
                } else {
                    socket.close()
                    resolve(false)
                }
            }, 2000)
        })
    }

connTo = async (n, node) => {
        const client = new Client(`${node.addr}?token=${node.token}`)
        client.on('open', async () => {
            this.setState(p => ({conns: {...p.conns, [n]: client}}))
            setInterval(() => this.updateInfo(n), 1333)
        })
    }