curl -X POST "https://graph.facebook.com/v19.0/<WHATSAPP_BUSINESS_ACCOUNT_ID>/message_templates" \
  -H "Authorization: Bearer <ACCESS_TOKEN>" \
  -H "Content-Type: application/json" \
  -d '
  {
    "name": "<TEMPLATE_NAME>",
    "language": "<TEMPLATE_LANGUAGE>",
    "category": "authentication",
    "message_send_ttl_seconds": <TIME_TO_LIVE>,
    "components": [\
      {\
        "type": "body",\
        "add_security_recommendation": <SECURITY_RECOMMENDATION>\
      },\
      {\
        "type": "footer",\
        "code_expiration_minutes": <CODE_EXPIRATION>\
      },\
      {\
        "type": "buttons",\
        "buttons": [\
          {\
            "type": "otp",\
            "otp_type": "zero_tap",\
            "text": "<CODY_CODE_BUTTON_TEXT>",\
            "autofill_text": "<AUTOFILL_BUTTON_TEXT>",\
            "zero_tap_terms_accepted": <TERMS_ACCEPTED>,\
            "supported_apps": [\
              {\
                "package_name": "<PACKAGE_NAME>",\
                "signature_hash": "<SIGNATURE_HASH>"\
              }\
            ]\
          }\
        ]\
      }\
    ]
  }'

curl 'https://graph.facebook.com/v24.0/102290129340398/message_templates' \
-H 'Content-Type: application/json' \
-H 'Authorization: Bearer EAAJB...' \
-d '
\{
  "name": "zero_tap_auth_template",
  "language": "en_US",
  "category": "authentication",
  "message_send_ttl_seconds": 60,
  "components": [\
    {\
      "type": "body",\
      "add_security_recommendation": true\
    },\
    {\
      "type": "footer",\
      "code_expiration_minutes": 5\
    },\
    {\
      "type": "buttons",\
      "buttons": [\
        {\
          "type": "otp",\
          "otp_type": "zero_tap",\
          "text": "Copy Code",\
          "autofill_text": "Autofill",\
          "zero_tap_terms_accepted": true,\
          "supported_apps": [\
            {\
              "package_name": "com.example.luckyshrub",\
              "signature_hash": "K8a/AINcGX7"\
            }\
          ]\
        }\
      ]\
    }\
  ]
}'

\{
  "id": "594425479261596",
  "status": "PENDING",
  "category": "AUTHENTICATION"
}

./sms_retriever_hash_v9.sh --package "com.example.myapplication" --keystore ~/.android/debug.keystore

"buttons": [\
  {\
    "type": "otp",\
    ...\
    "supported_apps": [\
      {\
        "package_name": "<PACKAGE_NAME_1>",\
        "signature_hash": "<SIGNATURE_HASH_1>"\
      },\
      {\
        "package_name": "<PACKAGE_NAME_2>",\
        "signature_hash": "<SIGNATURE_HASH_2>"\
      },\
      ...\
    ]\
  }\
]

"buttons": [\
  {\
    "type": "otp",\
    ...\
    "package_name": "<PACKAGE_NAME>",\
    "signature_hash": "<SIGNATURE_HASH>"\
  }\
]

dependencies {
    …
    implementation 'com.whatsapp.otp:whatsapp-otp-android-sdk:0.1.0'
    …
}

repositories {
    …
    mavenCentral()
    …
}

<receiver
   android:name=".app.receiver.OtpCodeReceiver"
   android:enabled="true"
   android:exported="true">
   <intent-filter>
       <action android:name="com.whatsapp.otp.OTP_RETRIEVED" />
   </intent-filter>
</receiver>

public class OtpCodeReceiver extends BroadcastReceiver {

  @Override
  public void onReceive(Context context, Intent intent) {
    WhatsAppOtpIncomingIntentHandler whatsAppOtpIncomingIntentHandler = new WhatsAppOtpIncomingIntentHandler();
    whatsAppOtpIncomingIntentHandler.processOtpCode(intent,
      // call your function to validate
      (code) -> validateCode(code),
      // call your function to handle errors
      (error, exception) -> handleError(error, exception));
    }
}

public class OtpCodeReceiver extends BroadcastReceiver

    @Override
    public void onReceive(Context context, Intent intent) {
       PendingIntent pendingIntent =     intent.getParcelableExtra("_ci_");
       // verify source of the pendingIntent
       String pendingIntentCreatorPackage = pendingIntent.getCreatorPackage();

       String creatorPackage = pendingIntent.getCreatorPackage();
       if ("com.whatsapp".equals(creatorPackage) ||
           "com.whatsapp.w4b".equals(creatorPackage)) {
          // use OTP code
          String otpCode = intent.getStringExtra("code");
          // ...
       }
    }
}

<activity
   android:name=".ReceiveCodeActivity"
   android:enabled="true"
   android:exported="true"
   android:launchMode="standard">
   <intent-filter>
       <action android:name="com.whatsapp.otp.OTP_RETRIEVED" />
   </intent-filter>
</activity>

public class ReceiveCodeActivity extends AppCompatActivity {

   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       Intent intent = getIntent();
       // retrieve PendingIntent from extras bundle
       PendingIntent pendingIntent = intent.getParcelableExtra("_ci_");
       // verify source of the pendingIntent
       String pendingIntentCreatorPackage = pendingIntent.getCreatorPackage();
       // check if creatorPackage is "com.whatsapp" -> WA consumer app Or
       // "com.whatsapp.w4b" -> WA business app
       if ("com.whatsapp".equals(creatorPackage) || "com.whatsapp.w4b".equals(creatorPackage)) {
         // use OTP code
         String otpCode = intent.getStringExtra("code");
       }
   }
}

WhatsAppOtpHandler whatsAppOtpHandler = new WhatsAppOtpHandler();
whatsAppOtpHandler.sendOtpIntentToWhatsApp(context);

public void sendOtpIntentToWhatsApp() {
   // Send OTP_REQUESTED intent to both WA and WA Business App
   sendOtpIntentToWhatsApp("com.whatsapp");
   sendOtpIntentToWhatsApp("com.whatsapp.w4b");
}

private void sendOtpIntentToWhatsApp(String packageName) {

  /**
  * Starting with Build.VERSION_CODES.S, it will be required to explicitly
  * specify the mutability of  PendingIntents on creation with either
  * (@link #FLAG_IMMUTABLE} or FLAG_MUTABLE
  */
  int flags = Build.VERSION.SDK_INT >= Build.VERSION_CODES.S ? FLAG_IMMUTABLE : 0;
  PendingIntent pi = PendingIntent.getActivity(
      getApplicationContext(),
      0,
      new Intent(),
      flags);

  // Send OTP_REQUESTED intent to WhatsApp
  Intent intentToWhatsApp = new Intent();
  intentToWhatsApp.setPackage(packageName);
  intentToWhatsApp.setAction("com.whatsapp.otp.OTP_REQUESTED");
  // WA will use this to verify the identity of the caller app.
  Bundle extras = intentToWhatsApp.getExtras();
  if (extras == null) {
     extras = new Bundle();
  }
  extras.putParcelable("_ci_", pi);
  intentToWhatsApp.putExtras(extras);
  getApplicationContext().sendBroadcast(intentToWhatsApp);
}

<queries>
    <package android:name="com.whatsapp"/>
    <package android:name="com.whatsapp.w4b"/>
</queries>

WhatsAppOtpHandler whatsAppOtpHandler = new WhatsAppOtpHandler();

If (whatsAppOtpHandler.isWhatsAppInstalled(context)) {
    // ... do something
}

curl -X POST "https://graph.facebook.com/<API_VERSION>/<WHATSAPP_BUSINESS_PHONE_NUMBER_ID>/messages" \
  -H "Authorization: Bearer <ACCESS_TOKEN>" \
  -H "Content-Type: application/json" \
  -d '
\{
    "messaging_product": "whatsapp",
    "recipient_type": "individual",
    "to": "<CUSTOMER_PHONE_NUMBER>",
    "type": "template",
    "template": {
      "name": "<TEMPLATE_NAME>",
      "language": {
        "code": "<TEMPLATE_LANGUAGE_CODE>"
      },
      "components": [\
        {\
          "type": "body",\
          "parameters": [\
            {\
              "type": "text",\
              "text": "<ONE-TIME PASSWORD>"\
            }\
          ]\
        },\
        {\
          "type": "button",\
          "sub_type": "url",\
          "index": "0",\
          "parameters": [\
            {\
              "type": "text",\
              "text": "<ONE-TIME PASSWORD>"\
            }\
          ]\
        }\
      ]
    }
  }'

\{
  "messaging_product": "whatsapp",
  "contacts": [\
    {\
      "input": "<INPUT>",\
      "wa_id": "<WA_ID>"\
    }\
  ],
  "messages": [\
    {\
      "id": "<ID>"\
    }\
  ]
}

curl -L 'https://graph.facebook.com/v24.0/105954558954427/messages' \
-H 'Content-Type: application/json' \
-H 'Authorization: Bearer EAAJB...' \
-d '{
      "messaging_product": "whatsapp",
      "recipient_type": "individual",
      "to": "12015553931",
      "type": "template",
      "template": {
        "name": "verification_code",
        "language": {
          "code": "en_US"
      },
      "components": [\
        {\
          "type": "body",\
          "parameters": [\
            {\
              "type": "text",\
              "text": "J$FpnYnP"\
            }\
          ]\
        },\
        {\
          "type": "button",\
          "sub_type": "url",\
          "index": "0",\
          "parameters": [\
            {\
              "type": "text",\
              "text": "J$FpnYnP"\
            }\
          ]\
        }\
      ]
    }
  }'

\{
  "messaging_product": "whatsapp",
  "contacts": [\
    {\
      "input": "12015553931",\
      "wa_id": "12015553931"\
    }\
  ],
  "messages": [\
    {\
      "id": "wamid.HBgLMTY1MDM4Nzk0MzkVAgARGBI4Qzc5QkNGNTc5NTMyMDU5QzEA"\
    }\
  ]
}