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/DefaultsXmlParser.java

@@ -0,0 +1,108 @@
+package com.google.firebase.remoteconfig.internal;
+
+/* loaded from: classes3.dex */
+public class DefaultsXmlParser {
+    private static final String XML_TAG_ENTRY = "entry";
+    private static final String XML_TAG_KEY = "key";
+    private static final String XML_TAG_VALUE = "value";
+
+    /* JADX WARN: Removed duplicated region for block: B:37:0x0079  */
+    /* JADX WARN: Removed duplicated region for block: B:42:0x0086 A[Catch: IOException | XmlPullParserException -> 0x0013, TryCatch #0 {IOException | XmlPullParserException -> 0x0013, blocks: (B:3:0x0007, B:5:0x000d, B:8:0x0016, B:13:0x0028, B:15:0x008a, B:18:0x0031, B:22:0x0041, B:24:0x0045, B:30:0x0053, B:38:0x007b, B:40:0x0081, B:42:0x0086, B:44:0x0062, B:47:0x006c), top: B:2:0x0007 }] */
+    /*
+        Code decompiled incorrectly, please refer to instructions dump.
+        To view partially-correct add '--show-bad-code' argument
+    */
+    public static java.util.Map<java.lang.String, java.lang.String> getDefaultsFromXml(android.content.Context r8, int r9) {
+        /*
+            java.lang.String r0 = "FirebaseRemoteConfig"
+            java.util.HashMap r1 = new java.util.HashMap
+            r1.<init>()
+            android.content.res.Resources r8 = r8.getResources()     // Catch: java.lang.Throwable -> L13
+            if (r8 != 0) goto L16
+            java.lang.String r8 = "Could not find the resources of the current context while trying to set defaults from an XML."
+            android.util.Log.e(r0, r8)     // Catch: java.lang.Throwable -> L13
+            return r1
+        L13:
+            r8 = move-exception
+            goto L8f
+        L16:
+            android.content.res.XmlResourceParser r8 = r8.getXml(r9)     // Catch: java.lang.Throwable -> L13
+            int r9 = r8.getEventType()     // Catch: java.lang.Throwable -> L13
+            r2 = 0
+            r3 = r2
+            r4 = r3
+            r5 = r4
+        L22:
+            r6 = 1
+            if (r9 == r6) goto L94
+            r7 = 2
+            if (r9 != r7) goto L2e
+            java.lang.String r3 = r8.getName()     // Catch: java.lang.Throwable -> L13
+            goto L8a
+        L2e:
+            r7 = 3
+            if (r9 != r7) goto L4e
+            java.lang.String r9 = r8.getName()     // Catch: java.lang.Throwable -> L13
+            java.lang.String r3 = "entry"
+            boolean r9 = r9.equals(r3)     // Catch: java.lang.Throwable -> L13
+            if (r9 == 0) goto L4c
+            if (r4 == 0) goto L45
+            if (r5 == 0) goto L45
+            r1.put(r4, r5)     // Catch: java.lang.Throwable -> L13
+            goto L4a
+        L45:
+            java.lang.String r9 = "An entry in the defaults XML has an invalid key and/or value tag."
+            android.util.Log.w(r0, r9)     // Catch: java.lang.Throwable -> L13
+        L4a:
+            r4 = r2
+            r5 = r4
+        L4c:
+            r3 = r2
+            goto L8a
+        L4e:
+            r7 = 4
+            if (r9 != r7) goto L8a
+            if (r3 == 0) goto L8a
+            int r9 = r3.hashCode()     // Catch: java.lang.Throwable -> L13
+            r7 = 106079(0x19e5f, float:1.48648E-40)
+            if (r9 == r7) goto L6c
+            r7 = 111972721(0x6ac9171, float:6.4912916E-35)
+            if (r9 == r7) goto L62
+            goto L76
+        L62:
+            java.lang.String r9 = "value"
+            boolean r9 = r3.equals(r9)     // Catch: java.lang.Throwable -> L13
+            if (r9 == 0) goto L76
+            r9 = r6
+            goto L77
+        L6c:
+            java.lang.String r9 = "key"
+            boolean r9 = r3.equals(r9)     // Catch: java.lang.Throwable -> L13
+            if (r9 == 0) goto L76
+            r9 = 0
+            goto L77
+        L76:
+            r9 = -1
+        L77:
+            if (r9 == 0) goto L86
+            if (r9 == r6) goto L81
+            java.lang.String r9 = "Encountered an unexpected tag while parsing the defaults XML."
+            android.util.Log.w(r0, r9)     // Catch: java.lang.Throwable -> L13
+            goto L8a
+        L81:
+            java.lang.String r5 = r8.getText()     // Catch: java.lang.Throwable -> L13
+            goto L8a
+        L86:
+            java.lang.String r4 = r8.getText()     // Catch: java.lang.Throwable -> L13
+        L8a:
+            int r9 = r8.next()     // Catch: java.lang.Throwable -> L13
+            goto L22
+        L8f:
+            java.lang.String r9 = "Encountered an error while parsing the defaults XML file."
+            android.util.Log.e(r0, r9, r8)
+        L94:
+            return r1
+        */
+        throw new UnsupportedOperationException("Method not decompiled: com.google.firebase.remoteconfig.internal.DefaultsXmlParser.getDefaultsFromXml(android.content.Context, int):java.util.Map");
+    }
+}