How Aaddhar Verification Works
Before diving into the implementation, here’s a video that demonstrates how Aadhaar verification works, explaining the overall process:
Why Aadhaar Verification is Critical in Fintech Projects
Aadhaar card verification plays a crucial role in many financial and fintech projects. Here are a few key scenarios where Aadhaar verification is essential- KYC Compliance:- Fintech companies need to verify customer identities to comply with the Reserve Bank of India’s regulations. Aadhaar verification helps to streamline KYC processes quickly and efficiently.
- Account Creation:- Digital banking apps and financial platforms often require Aadhaar verification as a part of their onboarding process to verify the authenticity of users.
- Loan Disbursement and Insurance:- Aadhaar verification helps verify a user's identity before disbursing loans or approving insurance policies, ensuring the authenticity of the applicant.
- Preventing Fraud:- Aadhaar verification reduces the risk of fraud by confirming that the person attempting to access services is who they claim to be.
Prerequisites
- Flutter development environemnt set up on your machines.
- A Setu account with access to their Aadhaar verification API.
- API credentials (x-cilent-id, x-client-secret, x-product-instane-id) from setu.
Overview of Setu API
- Create Aadhaar Verification Request: Initiates a verification request.
- Get Aadhaar Verification Details: Fetches the status and details of the verification request.
Example Request and Response
Sandbox BaseURL:- ttps://dg-sandbox.setu.coProduction BaseURL: https://dg.setu.co- Create Aadhar Verification Request. Official Doc
{
"redirectURL": "https://setu.co"
}
Response:
{
"id": "7097e53a-ba29-48a2-983d-878433b4f33e",
"url": "https://setuOKYCURL.co/foobar&sessionId=uuid",
"validUpto": "Wed, 23 Jun 2021 19:33:55 GMT",
"status": "incomplete"
}Request Body:2. Verify OKYC Request (Aadhar Car Verification). Official DocCURL:
curl --request POST \
--url https://dg-sandbox.setu.co/api/okyc/{requestId}/verify \
--header 'content-type: application/json' \
--header 'x-client-id: test-client' \
--header 'x-client-secret: YOUR_CLIENT_SECRET' \
--header 'x-product-instance-id: YOUR_X_PRODUCT_INSTANCE_ID' \
--data '{
"aadhaarNumber": "999999990019",
"captchaCode": "2GAD0"
}'
Integrating Aadhar Verification in Flutter
Step 1: Set Up Flutter Project
In case you don't already have one, create a new Flutter project:flutter create aadhaar_verification_setucd aadhaar_verification_setu
Step 2: Add Dependencies
Open pubspec.yaml and add the http package for making API requests:dependencies:flutter:sdk: flutter http: ^0.14.0Run “flutter pub get” to install the dependencies.
Step 3: Creating an API Services Class to Handle API Calls
Create a new file lib/api_service.dart to handle the API requests.
import 'dart:convert';
import 'package:http/http.dart' as http;
class AadhaarVerificationService {
final String baseUrl = 'https://dg-sandbox.setu.co/api/okyc';
final String clientId = 'test-client';
final String clientSecret = 'YOUR_CLIENT_SECRET';
final String productInstanceId = 'YOUR_PRODUCT_INSTANCE_ID';
Future<Map<String, dynamic>> verifyAadhaarCard(
String requestId, String aadhaarNumber, String captchaCode) async {
final url = Uri.parse('$baseUrl/$requestId/verify');
final response = await http.post(
url,
headers: {
'Content-Type': 'application/json',
'x-client-id': clientId,
'x-client-secret': clientSecret,
'x-product-instance-id': productInstanceId,
},
body: jsonEncode({
'aadhaarNumber': aadhaarNumber,
'captchaCode': captchaCode,
}),
);
if (response.statusCode == 200) {
return jsonDecode(response.body);
} else {
throw Exception('Failed to verify Aadhaar card: ${response.reasonPhrase}');
}
}
}
Step 4: Creating the UI
Make a basic user interface (UI) in lib/main.dart that includes a TextField for the Aadhaar number and captcha code, as well as a Button to start the verification process.import 'package:flutter/material.dart';
import 'api_service.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Aadhaar Verification',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: AadhaarVerificationScreen(),
);
}
}
class AadhaarVerificationScreen extends StatefulWidget {
@override
_AadhaarVerificationScreenState createState() => _AadhaarVerificationScreenState();
}
class _AadhaarVerificationScreenState extends State<AadhaarVerificationScreen> {
final TextEditingController _aadhaarController = TextEditingController();
final TextEditingController _captchaController = TextEditingController();
Future<void> verifyAadhaar() async {
final response = await ApiService.verifyAadhaar(
_aadhaarController.text,
_captchaController.text,
);
if (response != null) {
print('Verification Response: $response');
} else {
print('Failed to verify Aadhaar');
}
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Aadhaar Verification'),
),
body: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
children: [
TextField(
controller: _aadhaarController,
decoration: InputDecoration(labelText: 'Aadhaar Number'),
),
TextField(
controller: _captchaController,
decoration: InputDecoration(labelText: 'Captcha Code'),
),
SizedBox(height: 20),
ElevatedButton(
onPressed: verifyAadhaar,
child: Text('Verify'),
),
],
),
),
);
}
}
