Step1: Master Key Signer

If you want to use signers from Rangers , also need to run this command:

npm install mpcsinger

Install By Yarn

yarn add mpcsmartaccount

import {  MpcSigner } from "mpcsinger";

/**
 * export type YeehaJwtSignerOptions = {
 *   private_key: string;                 // The App Identity registered in YeehaWallet server.
 *   userTokenFn: functin;              // The function is get user token from the Oauth service registered in the YeehaWallet server.
 * };
 */

let signer = new MpcSigner({
  private_key,
  userTokenFn
});