Primer paso de la investigacion. Se aportan el .apk, las carpetas con el apk extraido y el apk descompilado. El archivo API_DOCUMENTATION.md es un archivo donde se anotaran los descubrimientos del funcionamiento de la API, y los .py son scripts para probar la funcionalidad de la API con los métodos que vayamos encontrando. Finalmente, los archivos .js son scripts de Frida para extraer informacion de la APP durante la ejecucion.

apk_decompiled/sources/com/google/firebase/remoteconfig/internal/Personalization.java

@@ -0,0 +1,71 @@
+package com.google.firebase.remoteconfig.internal;
+
+import android.os.Bundle;
+import com.google.firebase.analytics.connector.AnalyticsConnector;
+import com.google.firebase.inject.Provider;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import org.json.JSONObject;
+
+/* loaded from: classes3.dex */
+public class Personalization {
+    public static final String ANALYTICS_ORIGIN_PERSONALIZATION = "fp";
+    public static final String ARM_INDEX = "armIndex";
+    public static final String CHOICE_ID = "choiceId";
+    public static final String EXTERNAL_ARM_INDEX_PARAM = "arm_index";
+    public static final String EXTERNAL_ARM_VALUE_PARAM = "arm_value";
+    public static final String EXTERNAL_EVENT = "personalization_assignment";
+    public static final String EXTERNAL_GROUP_PARAM = "group";
+    public static final String EXTERNAL_PERSONALIZATION_ID_PARAM = "personalization_id";
+    public static final String EXTERNAL_RC_PARAMETER_PARAM = "arm_key";
+    public static final String GROUP = "group";
+    public static final String INTERNAL_CHOICE_ID_PARAM = "_fpid";
+    public static final String INTERNAL_EVENT = "_fpc";
+    public static final String PERSONALIZATION_ID = "personalizationId";
+    private final Provider<AnalyticsConnector> analyticsConnector;
+    private final Map<String, String> loggedChoiceIds = Collections.synchronizedMap(new HashMap());
+
+    public Personalization(Provider<AnalyticsConnector> provider) {
+        this.analyticsConnector = provider;
+    }
+
+    public void logArmActive(String str, ConfigContainer configContainer) {
+        JSONObject optJSONObject;
+        AnalyticsConnector analyticsConnector = this.analyticsConnector.get();
+        if (analyticsConnector == null) {
+            return;
+        }
+        JSONObject personalizationMetadata = configContainer.getPersonalizationMetadata();
+        if (personalizationMetadata.length() < 1) {
+            return;
+        }
+        JSONObject configs = configContainer.getConfigs();
+        if (configs.length() >= 1 && (optJSONObject = personalizationMetadata.optJSONObject(str)) != null) {
+            String optString = optJSONObject.optString(CHOICE_ID);
+            if (optString.isEmpty()) {
+                return;
+            }
+            synchronized (this.loggedChoiceIds) {
+                try {
+                    if (optString.equals(this.loggedChoiceIds.get(str))) {
+                        return;
+                    }
+                    this.loggedChoiceIds.put(str, optString);
+                    Bundle bundle = new Bundle();
+                    bundle.putString(EXTERNAL_RC_PARAMETER_PARAM, str);
+                    bundle.putString(EXTERNAL_ARM_VALUE_PARAM, configs.optString(str));
+                    bundle.putString(EXTERNAL_PERSONALIZATION_ID_PARAM, optJSONObject.optString(PERSONALIZATION_ID));
+                    bundle.putInt(EXTERNAL_ARM_INDEX_PARAM, optJSONObject.optInt(ARM_INDEX, -1));
+                    bundle.putString("group", optJSONObject.optString("group"));
+                    analyticsConnector.logEvent(ANALYTICS_ORIGIN_PERSONALIZATION, EXTERNAL_EVENT, bundle);
+                    Bundle bundle2 = new Bundle();
+                    bundle2.putString(INTERNAL_CHOICE_ID_PARAM, optString);
+                    analyticsConnector.logEvent(ANALYTICS_ORIGIN_PERSONALIZATION, INTERNAL_EVENT, bundle2);
+                } catch (Throwable th) {
+                    throw th;
+                }
+            }
+        }
+    }
+}