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Some commands useful for debugging deeplinking

Check signature of an APK

keytool -printcert -jarfile file.apk

The SHA256 is the interesting one and need for the assetlink.json

Reverify assetlink

adb shell pm verify-app-links --re-verify com.bnpp.easybanking.dev

Manuamly trigger a deeplink

adb shell am start -W -a android.intent.action.VIEW -d "https://app.easybanking.bnpparibasfortis.be/mobile/sign?code=1234567890\&code_verifier=0987654321"

Add an <intent-filter> on the app/src/debug/AndroidManifest.xml DebugActivity for the env you want to test

Be aware in order for the assetlink.json to resolve after installation the domain you want to test needs to be publicly accessible.

We are going to use PILOT for this env as it is public

<intent-filter android:autoVerify="true">
    <action android:name="android.intent.action.VIEW" />
    <category android:name="android.intent.category.DEFAULT" />
    <category android:name="android.intent.category.BROWSABLE" />
    <data android:scheme="https" />
    <data
        android:host="app.piloteasybanking.bnpparibasfortis.be"
        android:pathPattern="/mobile/.*" />
</intent-filter>

Install the build variant you want, preferably on a real device

After installation check following command

adb shell dumpsys package d

Find the package name you are interested in.
Eg Fortis Debug: com.bnpp.easybanking.dev

Check underneath the section App verification status: if the output resembles

Package: com.bnpp.easybanking.dev
Domains: app.piloteasybanking.bnpparibasfortis.be
Status:  always : 200000018

Status always indicates the app will always handle the domain by opening the app.

Package: com.bnpp.easybanking.dev
Domains: app.piloteasybanking.bnpparibasfortis.be
Status:  ask

Status indicates the app will show an chooser at the bottom of the screen.
Auto verification failed basically.

‼️ The deeplink needs to be publically accessable.

Google App Signing If your app is signed by Google you don't have the SHA256.

You can find the SHA256 from Google's key in the Play Store.

Google Play Console > Setup > App Integrity > Digital Asset Links JSON

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