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/kotlin/PreconditionsKt__PreconditionsKt.java

@@ -0,0 +1,82 @@
+package kotlin;
+
+import com.google.firebase.messaging.Constants;
+import kotlin.internal.InlineOnly;
+import kotlin.jvm.functions.Function0;
+import kotlin.jvm.internal.Intrinsics;
+import kotlin.jvm.internal.SourceDebugExtension;
+
+@Metadata(d1 = {"\u0000\"\n\u0000\n\u0002\u0010\u0002\n\u0000\n\u0002\u0010\u000b\n\u0000\n\u0002\u0018\u0002\n\u0002\u0010\u0000\n\u0002\b\u0005\n\u0002\u0010\u0001\n\u0002\b\u0004\u001a\u001c\u0010\u0000\u001a\u00020\u00012\u0006\u0010\u0002\u001a\u00020\u0003H\u0087\b\u0082\u0002\b\n\u0006\b\u0000\u001a\u0002\u0010\u0001\u001a-\u0010\u0000\u001a\u00020\u00012\u0006\u0010\u0002\u001a\u00020\u00032\f\u0010\u0004\u001a\b\u0012\u0004\u0012\u00020\u00060\u0005H\u0087\bø\u0001\u0000\u0082\u0002\b\n\u0006\b\u0000\u001a\u0002\u0010\u0001\u001a/\u0010\u0007\u001a\u0002H\b\"\b\b\u0000\u0010\b*\u00020\u00062\b\u0010\u0002\u001a\u0004\u0018\u0001H\bH\u0087\b\u0082\u0002\n\n\b\b\u0000\u001a\u0004\b\u0003\u0010\u0001¢\u0006\u0002\u0010\t\u001a@\u0010\u0007\u001a\u0002H\b\"\b\b\u0000\u0010\b*\u00020\u00062\b\u0010\u0002\u001a\u0004\u0018\u0001H\b2\f\u0010\u0004\u001a\b\u0012\u0004\u0012\u00020\u00060\u0005H\u0087\bø\u0001\u0000\u0082\u0002\n\n\b\b\u0000\u001a\u0004\b\u0003\u0010\u0001¢\u0006\u0002\u0010\n\u001a\u0011\u0010\u000b\u001a\u00020\f2\u0006\u0010\r\u001a\u00020\u0006H\u0087\b\u001a\u001c\u0010\u000e\u001a\u00020\u00012\u0006\u0010\u0002\u001a\u00020\u0003H\u0087\b\u0082\u0002\b\n\u0006\b\u0000\u001a\u0002\u0010\u0001\u001a-\u0010\u000e\u001a\u00020\u00012\u0006\u0010\u0002\u001a\u00020\u00032\f\u0010\u0004\u001a\b\u0012\u0004\u0012\u00020\u00060\u0005H\u0087\bø\u0001\u0000\u0082\u0002\b\n\u0006\b\u0000\u001a\u0002\u0010\u0001\u001a/\u0010\u000f\u001a\u0002H\b\"\b\b\u0000\u0010\b*\u00020\u00062\b\u0010\u0002\u001a\u0004\u0018\u0001H\bH\u0087\b\u0082\u0002\n\n\b\b\u0000\u001a\u0004\b\u0003\u0010\u0001¢\u0006\u0002\u0010\t\u001a@\u0010\u000f\u001a\u0002H\b\"\b\b\u0000\u0010\b*\u00020\u00062\b\u0010\u0002\u001a\u0004\u0018\u0001H\b2\f\u0010\u0004\u001a\b\u0012\u0004\u0012\u00020\u00060\u0005H\u0087\bø\u0001\u0000\u0082\u0002\n\n\b\b\u0000\u001a\u0004\b\u0003\u0010\u0001¢\u0006\u0002\u0010\n\u0082\u0002\u0007\n\u0005\b\u009920\u0001¨\u0006\u0010"}, d2 = {"check", "", "value", "", "lazyMessage", "Lkotlin/Function0;", "", "checkNotNull", "T", "(Ljava/lang/Object;)Ljava/lang/Object;", "(Ljava/lang/Object;Lkotlin/jvm/functions/Function0;)Ljava/lang/Object;", Constants.IPC_BUNDLE_KEY_SEND_ERROR, "", "message", "require", "requireNotNull", "kotlin-stdlib"}, k = 5, mv = {1, 9, 0}, xi = 49, xs = "kotlin/PreconditionsKt")
+@SourceDebugExtension({"SMAP\nPreconditions.kt\nKotlin\n*S Kotlin\n*F\n+ 1 Preconditions.kt\nkotlin/PreconditionsKt__PreconditionsKt\n+ 2 fake.kt\nkotlin/jvm/internal/FakeKt\n*L\n1#1,144:1\n1#2:145\n*E\n"})
+/* loaded from: classes3.dex */
+class PreconditionsKt__PreconditionsKt extends PreconditionsKt__AssertionsJVMKt {
+    @InlineOnly
+    private static final void check(boolean z3) {
+        if (!z3) {
+            throw new IllegalStateException("Check failed.");
+        }
+    }
+
+    @InlineOnly
+    private static final <T> T checkNotNull(T t2) {
+        if (t2 != null) {
+            return t2;
+        }
+        throw new IllegalStateException("Required value was null.");
+    }
+
+    @InlineOnly
+    private static final Void error(Object message) {
+        Intrinsics.checkNotNullParameter(message, "message");
+        throw new IllegalStateException(message.toString());
+    }
+
+    @InlineOnly
+    private static final void require(boolean z3) {
+        if (!z3) {
+            throw new IllegalArgumentException("Failed requirement.");
+        }
+    }
+
+    @InlineOnly
+    private static final <T> T requireNotNull(T t2) {
+        if (t2 != null) {
+            return t2;
+        }
+        throw new IllegalArgumentException("Required value was null.");
+    }
+
+    @InlineOnly
+    private static final void check(boolean z3, Function0<? extends Object> lazyMessage) {
+        Intrinsics.checkNotNullParameter(lazyMessage, "lazyMessage");
+        if (!z3) {
+            throw new IllegalStateException(lazyMessage.invoke().toString());
+        }
+    }
+
+    @InlineOnly
+    private static final <T> T checkNotNull(T t2, Function0<? extends Object> lazyMessage) {
+        Intrinsics.checkNotNullParameter(lazyMessage, "lazyMessage");
+        if (t2 != null) {
+            return t2;
+        }
+        throw new IllegalStateException(lazyMessage.invoke().toString());
+    }
+
+    @InlineOnly
+    private static final void require(boolean z3, Function0<? extends Object> lazyMessage) {
+        Intrinsics.checkNotNullParameter(lazyMessage, "lazyMessage");
+        if (!z3) {
+            throw new IllegalArgumentException(lazyMessage.invoke().toString());
+        }
+    }
+
+    @InlineOnly
+    private static final <T> T requireNotNull(T t2, Function0<? extends Object> lazyMessage) {
+        Intrinsics.checkNotNullParameter(lazyMessage, "lazyMessage");
+        if (t2 != null) {
+            return t2;
+        }
+        throw new IllegalArgumentException(lazyMessage.invoke().toString());
+    }
+}