feat: DigiLocker integration to fetch Aadhaar, PAN and Driving License

app/api/digilocker.ts

@@ -0,0 +1,117 @@
+import AsyncStorage from '@react-native-async-storage/async-storage'
+import axios from 'axios'
+import { Linking } from 'react-native'
+import { Config } from 'react-native-config'
+
+import { generateCodeChallenge } from '../utils/crypto'
+
+const DIGILOCKER_CLIENT_ID = Config.DIGILOCKER_CLIENT_ID
+const DIGILOCKER_CLIENT_SECRET = Config.DIGILOCKER_CLIENT_SECRET
+const DIGILOCKER_REDIRECT_URI = Config.DIGILOCKER_REDIRECT_URI
+
+export const initiateDigiLockerOAuth = async (codeVerifier: string): Promise<void | Error> => {
+  try {
+    AsyncStorage.setItem('codeVerifier', codeVerifier)
+    const codeChallenge = generateCodeChallenge(codeVerifier)
+
+    const authUrl = `https://api.digitallocker.gov.in/public/oauth2/1/authorize?response_type=code&client_id=${DIGILOCKER_CLIENT_ID}&redirect_uri=${DIGILOCKER_REDIRECT_URI}&state=adeya2024&code_challenge=${codeChallenge}&code_challenge_method=S256`
+
+    await Linking.openURL(authUrl)
+  } catch (error) {
+    return error instanceof Error ? error : new Error('An unknown error occurred')
+  }
+}
+
+export const fetchDigiLockerToken = async (
+  authCode: string,
+  codeVerifier: string,
+): Promise<any | { message: string }> => {
+  const tokenUrl = 'https://api.digitallocker.gov.in/public/oauth2/1/token'
+  const clientSecret = DIGILOCKER_CLIENT_SECRET
+  const clientId = DIGILOCKER_CLIENT_ID
+  const redirectUri = DIGILOCKER_REDIRECT_URI
+
+  const params =
+    `grant_type=authorization_code&` +
+    `code=${encodeURIComponent(authCode)}&` +
+    `client_id=${encodeURIComponent(clientId)}&` +
+    `client_secret=${encodeURIComponent(clientSecret)}&` +
+    `redirect_uri=${encodeURIComponent(redirectUri)}&` +
+    `code_verifier=${encodeURIComponent(codeVerifier)}`
+
+  try {
+    const response = await axios.post(tokenUrl, params, {
+      headers: {
+        'Content-Type': 'application/x-www-form-urlencoded',
+      },
+    })
+    return response.data
+  } catch (error) {
+    const errorMessage = error instanceof Error ? error.message : 'An unknown error occurred'
+    return { message: `Error fetching DigiLocker token: ${errorMessage}` }
+  }
+}
+
+export const fetchAadhaarData = async (accessToken: string): Promise<any | { message: string }> => {
+  const aadhaarUrl = 'https://api.digitallocker.gov.in/public/oauth2/3/xml/eaadhaar'
+
+  try {
+    const response = await axios.get(aadhaarUrl, {
+      headers: {
+        Authorization: `Bearer ${accessToken}`,
+      },
+    })
+    return response.data
+  } catch (error) {
+    const errorMessage = error instanceof Error ? error.message : 'An unknown error occurred'
+    return { message: `Error fetching Aadhaar data: ${errorMessage}` }
+  }
+}
+
+export const fetchIssuedDocuments = async (accessToken: string): Promise<any | { message: string }> => {
+  const issuedDocumentsUrl = 'https://api.digitallocker.gov.in/public/oauth2/2/files/issued'
+
+  try {
+    const response = await axios.get(issuedDocumentsUrl, {
+      headers: {
+        Authorization: `Bearer ${accessToken}`,
+      },
+    })
+    return response.data
+  } catch (error) {
+    const errorMessage = error instanceof Error ? error.message : 'An unknown error occurred'
+    return { message: `Error fetching issued documents: ${errorMessage}` }
+  }
+}
+
+export const fetchDocumentData = async (uri: string, accessToken: string): Promise<any | { message: string }> => {
+  const documentUrl = `https://api.digitallocker.gov.in/public/oauth2/1/xml/${uri}`
+
+  try {
+    const response = await axios.get(documentUrl, {
+      headers: {
+        Authorization: `Bearer ${accessToken}`,
+      },
+    })
+    return response.data
+  } catch (error) {
+    const errorMessage = error instanceof Error ? error.message : 'An unknown error occurred'
+    return { message: `Error fetching document data: ${errorMessage}` }
+  }
+}
+
+export const fetchDocument = async (uri: string, accessToken: string): Promise<any | { message: string }> => {
+  const documentUrl = `https://api.digitallocker.gov.in/public/oauth2/1/file/${uri}`
+
+  try {
+    const response = await axios.get(documentUrl, {
+      headers: {
+        Authorization: `Bearer ${accessToken}`,
+      },
+    })
+    return response.data
+  } catch (error) {
+    const errorMessage = error instanceof Error ? error.message : 'An unknown error occurred'
+    return { message: `Error fetching document data: ${errorMessage}` }
+  }
+}

app/localization/en/index.ts

@@ -574,6 +574,7 @@ const translation = {
     "OrganizationConnection": "Connection",
     "RenderCertificate": "Certificate",
     "GoogleDriveSignIn": "Google Drive Sign In",
+    "DigiLocker": "Fetch From DigiLocker"
   },
   "Loading": {
     "TakingTooLong": "This is taking longer than usual. You can return to home or continue waiting.",
@@ -731,6 +732,10 @@ const translation = {
     "RestoreInstructions": "Note: To restore your wallet, you can use a backup from your cloud storage or local device. Please ensure that the Google Drive app is installed on your device and you are signed in.",
     "RestoreInstructionsIOS": "If you can't see Google Drive in the file picker, open the Files app --> tap on the three dots at the top --> select 'Edit' --> enable Google Drive.",
   },
+  "DigiLocker": {
+    "Government": " Government IDs",
+    "DigiLockerInstructions": "Note: To fetch your documents from DigiLocker, you need to authenticate with your DigiLocker account.",
+  },
 }
 
 export default translation

app/navigators/SettingStack.tsx

@@ -8,6 +8,7 @@ import { useConfiguration } from '../contexts/configuration'
 import { useTheme } from '../contexts/theme'
 import CreateWallet from '../screens/CreateWallet'
 import DataRetention from '../screens/DataRetention'
+import DigiLockerScreen from '../screens/DigiLockerScreen'
 import ExportWallet from '../screens/ExportWallet'
 import ExportWalletConfirmation from '../screens/ExportWalletConfirmation'
 import GoogleDriveSignIn from '../screens/GoogleDriveSignIn'
@@ -94,6 +95,11 @@ const SettingStack: React.FC = () => {
         component={terms}
         options={{ title: t('Screens.Terms'), headerBackTestID: testIdWithKey('Back') }}
       />
+      <Stack.Screen
+        name={Screens.DigiLockerScreen}
+        component={DigiLockerScreen}
+        options={{ title: 'Fetch From DigiLocker', headerBackTestID: testIdWithKey('Back') }}
+      />
       <Stack.Screen
         name={Screens.Developer}
         component={developer}