How to use

post

function

in

request

/**
  * @returns Promise
  */
 isAlive() {
  return new Promise((resolve) => {
   post(this.jsonrpc_url, {
    json: {
     jsonrpc: '2.0',
     method: 'ping',
     params: [],
     id: '1',
    },
   }, (err, res, body) => resolve(!err && body && body.result === 'pong'));
  });
 }

/**
  * @returns Promise
  */
 send(method, extraParams) {
  this._counter = this._counter + 1;
  const params = {
   jsonrpc: '2.0',
   method,
   params: extraParams,
   id: this._counter,
  };
  const self = this;
  return new Promise((resolve, reject) => {
   setTimeout(() => {
    post(
     this.jsonrpc_url, { json: params },
     (err, res, body) => {
      if (err) return reject(err);
      if (body.error) return reject(body.error);
      return resolve(body.result);
     },
    );
   }, self.options.delay);
  });
 }