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/KPropertyImplKt.java

@@ -0,0 +1,71 @@
+package kotlin.reflect.jvm.internal;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+import kotlin.Metadata;
+import kotlin.jvm.internal.Intrinsics;
+import kotlin.jvm.internal.SourceDebugExtension;
+import kotlin.reflect.jvm.internal.KPropertyImpl;
+import kotlin.reflect.jvm.internal.calls.Caller;
+import kotlin.reflect.jvm.internal.calls.CallerImpl;
+import kotlin.reflect.jvm.internal.impl.descriptors.DeclarationDescriptor;
+import kotlin.reflect.jvm.internal.impl.descriptors.PropertyDescriptor;
+import kotlin.reflect.jvm.internal.impl.metadata.jvm.deserialization.JvmProtoBufUtil;
+import kotlin.reflect.jvm.internal.impl.resolve.DescriptorUtils;
+import kotlin.reflect.jvm.internal.impl.serialization.deserialization.descriptors.DeserializedPropertyDescriptor;
+import kotlin.reflect.jvm.internal.impl.types.TypeUtils;
+
+@Metadata(d1 = {"\u0000 \n\u0000\n\u0002\u0010\u0000\n\u0002\u0018\u0002\n\u0002\b\u0003\n\u0002\u0018\u0002\n\u0000\n\u0002\u0010\u000b\n\u0000\n\u0002\u0018\u0002\n\u0000\u001a \u0010\u0005\u001a\u0006\u0012\u0002\b\u00030\u0006*\n\u0012\u0002\b\u0003\u0012\u0002\b\u00030\u00022\u0006\u0010\u0007\u001a\u00020\bH\u0002\u001a\f\u0010\t\u001a\u00020\b*\u00020\nH\u0002\"\"\u0010\u0000\u001a\u0004\u0018\u00010\u0001*\n\u0012\u0002\b\u0003\u0012\u0002\b\u00030\u00028@X\u0080\u0004¢\u0006\u0006\u001a\u0004\b\u0003\u0010\u0004¨\u0006\u000b"}, d2 = {"boundReceiver", "", "Lkotlin/reflect/jvm/internal/KPropertyImpl$Accessor;", "getBoundReceiver", "(Lkotlin/reflect/jvm/internal/KPropertyImpl$Accessor;)Ljava/lang/Object;", "computeCallerForAccessor", "Lkotlin/reflect/jvm/internal/calls/Caller;", "isGetter", "", "isJvmFieldPropertyInCompanionObject", "Lkotlin/reflect/jvm/internal/impl/descriptors/PropertyDescriptor;", "kotlin-reflection"}, k = 2, mv = {1, 9, 0}, xi = 48)
+@SourceDebugExtension({"SMAP\nKPropertyImpl.kt\nKotlin\n*S Kotlin\n*F\n+ 1 KPropertyImpl.kt\nkotlin/reflect/jvm/internal/KPropertyImplKt\n+ 2 fake.kt\nkotlin/jvm/internal/FakeKt\n*L\n1#1,334:1\n1#2:335\n*E\n"})
+/* loaded from: classes3.dex */
+public final class KPropertyImplKt {
+    public static final /* synthetic */ Caller access$computeCallerForAccessor(KPropertyImpl.Accessor accessor, boolean z3) {
+        return computeCallerForAccessor(accessor, z3);
+    }
+
+    /* JADX WARN: Removed duplicated region for block: B:14:0x004b  */
+    /* JADX WARN: Removed duplicated region for block: B:16:0x0073  */
+    /* JADX WARN: Removed duplicated region for block: B:37:0x0112  */
+    /* JADX WARN: Removed duplicated region for block: B:54:0x0070  */
+    /*
+        Code decompiled incorrectly, please refer to instructions dump.
+        To view partially-correct add '--show-bad-code' argument
+    */
+    public static final kotlin.reflect.jvm.internal.calls.Caller<?> computeCallerForAccessor(kotlin.reflect.jvm.internal.KPropertyImpl.Accessor<?, ?> r6, boolean r7) {
+        /*
+            Method dump skipped, instructions count: 572
+            To view this dump add '--comments-level debug' option
+        */
+        throw new UnsupportedOperationException("Method not decompiled: kotlin.reflect.jvm.internal.KPropertyImplKt.computeCallerForAccessor(kotlin.reflect.jvm.internal.KPropertyImpl$Accessor, boolean):kotlin.reflect.jvm.internal.calls.Caller");
+    }
+
+    private static final CallerImpl<Field> computeCallerForAccessor$computeFieldCaller(KPropertyImpl.Accessor<?, ?> accessor, boolean z3, Field field) {
+        return (isJvmFieldPropertyInCompanionObject(accessor.getProperty().getDescriptor()) || !Modifier.isStatic(field.getModifiers())) ? z3 ? accessor.isBound() ? new CallerImpl.FieldGetter.BoundInstance(field, getBoundReceiver(accessor)) : new CallerImpl.FieldGetter.Instance(field) : accessor.isBound() ? new CallerImpl.FieldSetter.BoundInstance(field, computeCallerForAccessor$isNotNullProperty(accessor), getBoundReceiver(accessor)) : new CallerImpl.FieldSetter.Instance(field, computeCallerForAccessor$isNotNullProperty(accessor)) : computeCallerForAccessor$isJvmStaticProperty(accessor) ? z3 ? accessor.isBound() ? new CallerImpl.FieldGetter.BoundJvmStaticInObject(field) : new CallerImpl.FieldGetter.JvmStaticInObject(field) : accessor.isBound() ? new CallerImpl.FieldSetter.BoundJvmStaticInObject(field, computeCallerForAccessor$isNotNullProperty(accessor)) : new CallerImpl.FieldSetter.JvmStaticInObject(field, computeCallerForAccessor$isNotNullProperty(accessor)) : z3 ? new CallerImpl.FieldGetter.Static(field) : new CallerImpl.FieldSetter.Static(field, computeCallerForAccessor$isNotNullProperty(accessor));
+    }
+
+    private static final boolean computeCallerForAccessor$isJvmStaticProperty(KPropertyImpl.Accessor<?, ?> accessor) {
+        return accessor.getProperty().getDescriptor().getAnnotations().hasAnnotation(UtilKt.getJVM_STATIC());
+    }
+
+    private static final boolean computeCallerForAccessor$isNotNullProperty(KPropertyImpl.Accessor<?, ?> accessor) {
+        return !TypeUtils.isNullableType(accessor.getProperty().getDescriptor().getType());
+    }
+
+    public static final Object getBoundReceiver(KPropertyImpl.Accessor<?, ?> accessor) {
+        Intrinsics.checkNotNullParameter(accessor, "<this>");
+        return accessor.getProperty().getBoundReceiver();
+    }
+
+    private static final boolean isJvmFieldPropertyInCompanionObject(PropertyDescriptor propertyDescriptor) {
+        DeclarationDescriptor containingDeclaration = propertyDescriptor.getContainingDeclaration();
+        Intrinsics.checkNotNullExpressionValue(containingDeclaration, "getContainingDeclaration(...)");
+        if (!DescriptorUtils.isCompanionObject(containingDeclaration)) {
+            return false;
+        }
+        DeclarationDescriptor containingDeclaration2 = containingDeclaration.getContainingDeclaration();
+        if (DescriptorUtils.isInterface(containingDeclaration2) || DescriptorUtils.isAnnotationClass(containingDeclaration2)) {
+            return (propertyDescriptor instanceof DeserializedPropertyDescriptor) && JvmProtoBufUtil.isMovedFromInterfaceCompanion(((DeserializedPropertyDescriptor) propertyDescriptor).getProto());
+        }
+        return true;
+    }
+}