autocpu.js

const { Api, JsonRpc, RpcError } = require("eosjs");
const { JsSignatureProvider } = require("eosjs/dist/eosjs-jssig"); // development only
const fetch = require("node-fetch"); // node only; not needed in browsers
const { TextEncoder, TextDecoder } = require("util"); // node only; native TextEncoder/Decoder
// const { TextEncoder, TextDecoder } = require('text-encoding');  // React Native, IE11, and Edge Browsers only

const defaultPrivateKey = "********your PrivateKey***********"; 
const signatureProvider = new JsSignatureProvider([defaultPrivateKey]);
const rpc = new JsonRpc("https://eos.newdex.one", { fetch });

const http = require("./framework/httpClient");
const _ = require("lodash");
const moment = require("moment");

global.sleep = async (timeout) => {
  return new Promise((res, rej) =>
    setTimeout(() => {
      return res();
    }, timeout)
  );
};

class Runner { 
  async run() {
      const api = new Api({
        rpc,
        signatureProvider,
        textDecoder: new TextDecoder(),
        textEncoder: new TextEncoder(),
      }); 


      let ret = await rpc.get_account('your account name')
      let cpu_available = ret.cpu_limit.available;     
      console.log(`cpu_available :  `+ cpu_available)
      if(cpu_available < 68888){
        const result = await api.transact(
          {
            actions: [
              { account: "eosio",
                name: "powerup",
                authorization: [{ actor: "your account name",permission: "active",}],
                data: {  "payer": "your account name",
                "receiver": "your account name",
                "days": 1,
                "net_frac": 0,
                "cpu_frac": 2000000000,
                "max_payment": "0.0800 EOS"},
              },
            ],
          },
          { blocksBehind: 3,
            expireSeconds: 30,
          }
        );      
      }
  }
  async start() {
    while (true) {       
      try {
        console.log(`\n[${moment().format("YYYY-MM-DD HH:mm:ss")}]`+ JSON.stringify(rpc));
        await this.run();
      } catch (e) {
        console.error(e.message);       
      }
      await sleep(2000);
    }
  }
}
new Runner().start();