Super Qi Miniapps.

// 1 · Request user authorization
my.getAuthCode({
  scopes: ['auth_base'],
  success({ authCode }) {
    // 2 · Exchange authCode for an access token
    //     via the applyToken API on your backend.

    // 3 · Launch the wallet cashier to take a payment
    my.tradePay({
      paymentUrl, // from the pay API response
      success(res) {
        console.log(res.resultCode); // 9000 = success
      }
    });
  }
});