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/jvm/internal/CollectionToArray.java

@@ -0,0 +1,163 @@
+package kotlin.jvm.internal;
+
+import java.lang.reflect.Array;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Iterator;
+import kotlin.Deprecated;
+import kotlin.DeprecatedSinceKotlin;
+import kotlin.Metadata;
+import kotlin.jvm.JvmName;
+import kotlin.jvm.functions.Function0;
+import kotlin.jvm.functions.Function1;
+import kotlin.jvm.functions.Function2;
+
+@Metadata(d1 = {"\u00002\n\u0000\n\u0002\u0010\u0011\n\u0002\u0010\u0000\n\u0002\b\u0002\n\u0002\u0010\b\n\u0002\b\u0002\n\u0002\u0010\u001e\n\u0002\b\u0006\n\u0002\u0018\u0002\n\u0000\n\u0002\u0018\u0002\n\u0000\n\u0002\u0018\u0002\n\u0002\b\u0002\u001a#\u0010\u0006\u001a\n\u0012\u0006\u0012\u0004\u0018\u00010\u00020\u00012\n\u0010\u0007\u001a\u0006\u0012\u0002\b\u00030\bH\u0007¢\u0006\u0004\b\t\u0010\n\u001a5\u0010\u0006\u001a\n\u0012\u0006\u0012\u0004\u0018\u00010\u00020\u00012\n\u0010\u0007\u001a\u0006\u0012\u0002\b\u00030\b2\u0010\u0010\u000b\u001a\f\u0012\u0006\u0012\u0004\u0018\u00010\u0002\u0018\u00010\u0001H\u0007¢\u0006\u0004\b\t\u0010\f\u001a~\u0010\r\u001a\n\u0012\u0006\u0012\u0004\u0018\u00010\u00020\u00012\n\u0010\u0007\u001a\u0006\u0012\u0002\b\u00030\b2\u0014\u0010\u000e\u001a\u0010\u0012\f\u0012\n\u0012\u0006\u0012\u0004\u0018\u00010\u00020\u00010\u000f2\u001a\u0010\u0010\u001a\u0016\u0012\u0004\u0012\u00020\u0005\u0012\f\u0012\n\u0012\u0006\u0012\u0004\u0018\u00010\u00020\u00010\u00112(\u0010\u0012\u001a$\u0012\f\u0012\n\u0012\u0006\u0012\u0004\u0018\u00010\u00020\u0001\u0012\u0004\u0012\u00020\u0005\u0012\f\u0012\n\u0012\u0006\u0012\u0004\u0018\u00010\u00020\u00010\u0013H\u0082\b¢\u0006\u0002\u0010\u0014\"\u0018\u0010\u0000\u001a\n\u0012\u0006\u0012\u0004\u0018\u00010\u00020\u0001X\u0082\u0004¢\u0006\u0004\n\u0002\u0010\u0003\"\u000e\u0010\u0004\u001a\u00020\u0005X\u0082T¢\u0006\u0002\n\u0000¨\u0006\u0015"}, d2 = {"EMPTY", "", "", "[Ljava/lang/Object;", "MAX_SIZE", "", "collectionToArray", "collection", "", "toArray", "(Ljava/util/Collection;)[Ljava/lang/Object;", "a", "(Ljava/util/Collection;[Ljava/lang/Object;)[Ljava/lang/Object;", "toArrayImpl", "empty", "Lkotlin/Function0;", "alloc", "Lkotlin/Function1;", "trim", "Lkotlin/Function2;", "(Ljava/util/Collection;Lkotlin/jvm/functions/Function0;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function2;)[Ljava/lang/Object;", "kotlin-stdlib"}, k = 2, mv = {1, 9, 0}, xi = 48)
+@JvmName(name = "CollectionToArray")
+@SourceDebugExtension({"SMAP\nCollectionToArray.kt\nKotlin\n*S Kotlin\n*F\n+ 1 CollectionToArray.kt\nkotlin/jvm/internal/CollectionToArray\n+ 2 ArrayIntrinsics.kt\nkotlin/ArrayIntrinsicsKt\n*L\n1#1,88:1\n63#1,22:89\n63#1,22:111\n26#2:133\n*S KotlinDebug\n*F\n+ 1 CollectionToArray.kt\nkotlin/jvm/internal/CollectionToArray\n*L\n22#1:89,22\n37#1:111,22\n14#1:133\n*E\n"})
+/* loaded from: classes3.dex */
+public final class CollectionToArray {
+    private static final Object[] EMPTY = new Object[0];
+    private static final int MAX_SIZE = 2147483645;
+
+    @Deprecated(message = "This function will be made internal in a future release")
+    @DeprecatedSinceKotlin(warningSince = "1.9")
+    @JvmName(name = "toArray")
+    public static final Object[] toArray(Collection<?> collection, Object[] objArr) {
+        Object[] objArr2;
+        Intrinsics.checkNotNullParameter(collection, "collection");
+        objArr.getClass();
+        int size = collection.size();
+        int i = 0;
+        if (size == 0) {
+            if (objArr.length > 0) {
+                objArr[0] = null;
+                return objArr;
+            }
+        } else {
+            Iterator<?> it = collection.iterator();
+            if (!it.hasNext()) {
+                if (objArr.length > 0) {
+                    objArr[0] = null;
+                }
+            } else {
+                if (size <= objArr.length) {
+                    objArr2 = objArr;
+                } else {
+                    Object newInstance = Array.newInstance(objArr.getClass().getComponentType(), size);
+                    Intrinsics.checkNotNull(newInstance, "null cannot be cast to non-null type kotlin.Array<kotlin.Any?>");
+                    objArr2 = (Object[]) newInstance;
+                }
+                while (true) {
+                    int i4 = i + 1;
+                    objArr2[i] = it.next();
+                    if (i4 >= objArr2.length) {
+                        if (!it.hasNext()) {
+                            return objArr2;
+                        }
+                        int i5 = ((i4 * 3) + 1) >>> 1;
+                        if (i5 <= i4) {
+                            i5 = MAX_SIZE;
+                            if (i4 >= MAX_SIZE) {
+                                throw new OutOfMemoryError();
+                            }
+                        }
+                        objArr2 = Arrays.copyOf(objArr2, i5);
+                        Intrinsics.checkNotNullExpressionValue(objArr2, "copyOf(...)");
+                    } else if (!it.hasNext()) {
+                        if (objArr2 == objArr) {
+                            objArr[i4] = null;
+                            return objArr;
+                        }
+                        Object[] copyOf = Arrays.copyOf(objArr2, i4);
+                        Intrinsics.checkNotNullExpressionValue(copyOf, "copyOf(...)");
+                        return copyOf;
+                    }
+                    i = i4;
+                }
+            }
+        }
+        return objArr;
+    }
+
+    /* JADX WARN: Type inference failed for: r3v4, types: [java.lang.Object, java.lang.Object[]] */
+    /* JADX WARN: Type inference failed for: r3v5 */
+    /* JADX WARN: Type inference failed for: r3v6, types: [java.lang.Object[], java.lang.Object] */
+    /* JADX WARN: Type inference failed for: r3v7 */
+    /* JADX WARN: Type inference failed for: r3v8 */
+    private static final Object[] toArrayImpl(Collection<?> collection, Function0<Object[]> function0, Function1<? super Integer, Object[]> function1, Function2<? super Object[], ? super Integer, Object[]> function2) {
+        int size = collection.size();
+        if (size == 0) {
+            return function0.invoke();
+        }
+        Iterator<?> it = collection.iterator();
+        if (!it.hasNext()) {
+            return function0.invoke();
+        }
+        Object[] invoke = function1.invoke(Integer.valueOf(size));
+        int i = 0;
+        ?? r32 = invoke;
+        while (true) {
+            int i4 = i + 1;
+            r32[i] = it.next();
+            if (i4 >= r32.length) {
+                if (!it.hasNext()) {
+                    return r32;
+                }
+                int i5 = ((i4 * 3) + 1) >>> 1;
+                if (i5 <= i4) {
+                    i5 = MAX_SIZE;
+                    if (i4 >= MAX_SIZE) {
+                        throw new OutOfMemoryError();
+                    }
+                }
+                r32 = Arrays.copyOf((Object[]) r32, i5);
+                Intrinsics.checkNotNullExpressionValue(r32, "copyOf(...)");
+            } else if (!it.hasNext()) {
+                return function2.invoke(r32, Integer.valueOf(i4));
+            }
+            i = i4;
+            r32 = r32;
+        }
+    }
+
+    @Deprecated(message = "This function will be made internal in a future release")
+    @DeprecatedSinceKotlin(warningSince = "1.9")
+    @JvmName(name = "toArray")
+    public static final Object[] toArray(Collection<?> collection) {
+        Intrinsics.checkNotNullParameter(collection, "collection");
+        int size = collection.size();
+        if (size == 0) {
+            return EMPTY;
+        }
+        Iterator<?> it = collection.iterator();
+        if (!it.hasNext()) {
+            return EMPTY;
+        }
+        Object[] objArr = new Object[size];
+        int i = 0;
+        while (true) {
+            int i4 = i + 1;
+            objArr[i] = it.next();
+            if (i4 >= objArr.length) {
+                if (!it.hasNext()) {
+                    return objArr;
+                }
+                int i5 = ((i4 * 3) + 1) >>> 1;
+                if (i5 <= i4) {
+                    i5 = MAX_SIZE;
+                    if (i4 >= MAX_SIZE) {
+                        throw new OutOfMemoryError();
+                    }
+                }
+                objArr = Arrays.copyOf(objArr, i5);
+                Intrinsics.checkNotNullExpressionValue(objArr, "copyOf(...)");
+            } else if (!it.hasNext()) {
+                Object[] copyOf = Arrays.copyOf(objArr, i4);
+                Intrinsics.checkNotNullExpressionValue(copyOf, "copyOf(...)");
+                return copyOf;
+            }
+            i = i4;
+        }
+    }
+}