Signer.js

const puppeteer = require("puppeteer-extra");
const pluginStealth = require("puppeteer-extra-plugin-stealth");

puppeteer.use(pluginStealth());

class Signer {
  userAgent =
    "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.149 Safari/537.36";
  args = [
    "--no-sandbox",
    "--disable-setuid-sandbox",
    "--disable-infobars",
    "--window-position=0,0",
    "--ignore-certifcate-errors",
    "--ignore-certifcate-errors-spki-list",
    "--host-rules=MAP tiktok.com 127.0.0.1"
  ];

  constructor() {

    this.args.push(`--user-agent="${this.userAgent}"`);

    this.options = {
      args: this.args,
      headless: true,
      ignoreHTTPSErrors: true,
      userDataDir: "./tmp"
    };
  }

  async init() {
    this.browser = await puppeteer.launch(this.options);
    this.page = await this.browser.newPage();
    
    await this.page.setUserAgent(this.userAgent);

    await this.page.goto("http://tiktok.com:8080/index.html", {
      waitUntil: "load"
    });

    return this;
  }


  async sign(str) {
    
    let res = await this.page.evaluate(`generateSignature("${str}")`);
    return res;
  }

  async close() {
    await this.browser.close();
    this.browser = null;
    this.page = null;
  }
}

module.exports = Signer;