How to send and verify OTP using cloud function in flutter?

Question

I have API to send and verify otp code. I need to link that API to my flutter app using Firebase clod function. How is it possible Please help ?

Solution

1. Setup firebase cloud function here

2. Your js code be like

   exports.sendOtp = functions.https.onCall((request, response) => {
         const options = JSON.stringify({
           mobile: request.text,
         });
         const headers = {
           "Authorization": "Bearer xxxxxxxxxxxxxxxxxxxxxxx”,
         };
         const res = axios.post(“url”, options, {headers: headers}).then((response) => {
           console.log(response);
           return response;
         });
         return res.statusCode;
       });
   
   

3. Your service code be like

    Future<void> sendOtp(String mobile) async {
        HttpsCallable callable =
            FirebaseFunctions.instance.httpsCallable('sendOtp');
        final resp = await callable.call(<String, dynamic>{
          'text': mobile,
        });
     }