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/reflect/jvm/internal/calls/Caller.java

@@ -0,0 +1,37 @@
+package kotlin.reflect.jvm.internal.calls;
+
+import com.google.android.gms.measurement.internal.a;
+import java.lang.reflect.Member;
+import java.lang.reflect.Type;
+import java.util.List;
+import kotlin.Metadata;
+import kotlin.jvm.internal.Intrinsics;
+
+@Metadata(d1 = {"\u0000.\n\u0002\u0018\u0002\n\u0000\n\u0002\u0018\u0002\n\u0002\u0010\u0000\n\u0002\b\u0004\n\u0002\u0010 \n\u0002\u0018\u0002\n\u0002\b\u0007\n\u0002\u0010\u0011\n\u0002\b\u0002\n\u0002\u0010\u0002\n\u0002\b\u0002\b`\u0018\u0000*\f\b\u0000\u0010\u0001 \u0001*\u0004\u0018\u00010\u00022\u00020\u0003J\u001b\u0010\u000f\u001a\u0004\u0018\u00010\u00032\n\u0010\u0010\u001a\u0006\u0012\u0002\b\u00030\u0011H&¢\u0006\u0002\u0010\u0012J\u0019\u0010\u0013\u001a\u00020\u00142\n\u0010\u0010\u001a\u0006\u0012\u0002\b\u00030\u0011H\u0016¢\u0006\u0002\u0010\u0015R\u0012\u0010\u0004\u001a\u00028\u0000X¦\u0004¢\u0006\u0006\u001a\u0004\b\u0005\u0010\u0006R\u0018\u0010\u0007\u001a\b\u0012\u0004\u0012\u00020\t0\bX¦\u0004¢\u0006\u0006\u001a\u0004\b\n\u0010\u000bR\u0012\u0010\f\u001a\u00020\tX¦\u0004¢\u0006\u0006\u001a\u0004\b\r\u0010\u000e¨\u0006\u0016"}, d2 = {"Lkotlin/reflect/jvm/internal/calls/Caller;", "M", "Ljava/lang/reflect/Member;", "", "member", "getMember", "()Ljava/lang/reflect/Member;", "parameterTypes", "", "Ljava/lang/reflect/Type;", "getParameterTypes", "()Ljava/util/List;", "returnType", "getReturnType", "()Ljava/lang/reflect/Type;", "call", "args", "", "([Ljava/lang/Object;)Ljava/lang/Object;", "checkArguments", "", "([Ljava/lang/Object;)V", "kotlin-reflection"}, k = 1, mv = {1, 9, 0}, xi = 48)
+/* loaded from: classes3.dex */
+public interface Caller<M extends Member> {
+
+    @Metadata(k = 3, mv = {1, 9, 0}, xi = 48)
+    /* loaded from: classes3.dex */
+    public static final class DefaultImpls {
+        public static <M extends Member> void checkArguments(Caller<? extends M> caller, Object[] args) {
+            Intrinsics.checkNotNullParameter(args, "args");
+            if (CallerKt.getArity(caller) == args.length) {
+                return;
+            }
+            StringBuilder sb = new StringBuilder("Callable expects ");
+            sb.append(CallerKt.getArity(caller));
+            sb.append(" arguments, but ");
+            throw new IllegalArgumentException(a.m(sb, args.length, " were provided."));
+        }
+    }
+
+    Object call(Object[] args);
+
+    /* renamed from: getMember */
+    M mo1386getMember();
+
+    List<Type> getParameterTypes();
+
+    Type getReturnType();
+}