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/androidx/datastore/preferences/protobuf/C.java

@@ -0,0 +1,167 @@
+package androidx.datastore.preferences.protobuf;
+
+import java.nio.charset.Charset;
+import java.util.AbstractList;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import java.util.RandomAccess;
+
+/* loaded from: classes.dex */
+public final class C extends AbstractC0110b implements D, RandomAccess {
+
+    /* renamed from: b, reason: collision with root package name */
+    public final ArrayList f2846b;
+
+    static {
+        new C(10).f2891a = false;
+    }
+
+    public C(int i) {
+        this(new ArrayList(i));
+    }
+
+    @Override // java.util.AbstractList, java.util.List
+    public final void add(int i, Object obj) {
+        a();
+        this.f2846b.add(i, (String) obj);
+        ((AbstractList) this).modCount++;
+    }
+
+    @Override // androidx.datastore.preferences.protobuf.AbstractC0110b, java.util.AbstractCollection, java.util.Collection, java.util.List
+    public final boolean addAll(Collection collection) {
+        return addAll(this.f2846b.size(), collection);
+    }
+
+    @Override // androidx.datastore.preferences.protobuf.AbstractC0110b, java.util.AbstractList, java.util.AbstractCollection, java.util.Collection, java.util.List
+    public final void clear() {
+        a();
+        this.f2846b.clear();
+        ((AbstractList) this).modCount++;
+    }
+
+    @Override // androidx.datastore.preferences.protobuf.InterfaceC0132x
+    public final InterfaceC0132x d(int i) {
+        ArrayList arrayList = this.f2846b;
+        if (i < arrayList.size()) {
+            throw new IllegalArgumentException();
+        }
+        ArrayList arrayList2 = new ArrayList(i);
+        arrayList2.addAll(arrayList);
+        return new C(arrayList2);
+    }
+
+    @Override // androidx.datastore.preferences.protobuf.D
+    public final void e(C0116g c0116g) {
+        a();
+        this.f2846b.add(c0116g);
+        ((AbstractList) this).modCount++;
+    }
+
+    @Override // java.util.AbstractList, java.util.List
+    public final Object get(int i) {
+        String str;
+        ArrayList arrayList = this.f2846b;
+        Object obj = arrayList.get(i);
+        if (obj instanceof String) {
+            return (String) obj;
+        }
+        if (!(obj instanceof C0116g)) {
+            byte[] bArr = (byte[]) obj;
+            String str2 = new String(bArr, AbstractC0133y.f2975a);
+            Q q4 = v0.f2974a;
+            if (v0.f2974a.i(bArr, 0, bArr.length) == 0) {
+                arrayList.set(i, str2);
+            }
+            return str2;
+        }
+        C0116g c0116g = (C0116g) obj;
+        c0116g.getClass();
+        Charset charset = AbstractC0133y.f2975a;
+        if (c0116g.size() == 0) {
+            str = "";
+        } else {
+            str = new String(c0116g.f2912b, c0116g.b(), c0116g.size(), charset);
+        }
+        int b4 = c0116g.b();
+        if (v0.f2974a.i(c0116g.f2912b, b4, c0116g.size() + b4) == 0) {
+            arrayList.set(i, str);
+        }
+        return str;
+    }
+
+    @Override // androidx.datastore.preferences.protobuf.D
+    public final List getUnderlyingElements() {
+        return Collections.unmodifiableList(this.f2846b);
+    }
+
+    @Override // androidx.datastore.preferences.protobuf.D
+    public final D getUnmodifiableView() {
+        return this.f2891a ? new n0(this) : this;
+    }
+
+    @Override // java.util.AbstractList, java.util.List
+    public final Object remove(int i) {
+        a();
+        Object remove = this.f2846b.remove(i);
+        ((AbstractList) this).modCount++;
+        if (remove instanceof String) {
+            return (String) remove;
+        }
+        if (!(remove instanceof C0116g)) {
+            return new String((byte[]) remove, AbstractC0133y.f2975a);
+        }
+        C0116g c0116g = (C0116g) remove;
+        c0116g.getClass();
+        Charset charset = AbstractC0133y.f2975a;
+        if (c0116g.size() == 0) {
+            return "";
+        }
+        return new String(c0116g.f2912b, c0116g.b(), c0116g.size(), charset);
+    }
+
+    @Override // androidx.datastore.preferences.protobuf.D
+    public final Object s(int i) {
+        return this.f2846b.get(i);
+    }
+
+    @Override // java.util.AbstractList, java.util.List
+    public final Object set(int i, Object obj) {
+        a();
+        Object obj2 = this.f2846b.set(i, (String) obj);
+        if (obj2 instanceof String) {
+            return (String) obj2;
+        }
+        if (!(obj2 instanceof C0116g)) {
+            return new String((byte[]) obj2, AbstractC0133y.f2975a);
+        }
+        C0116g c0116g = (C0116g) obj2;
+        c0116g.getClass();
+        Charset charset = AbstractC0133y.f2975a;
+        if (c0116g.size() == 0) {
+            return "";
+        }
+        return new String(c0116g.f2912b, c0116g.b(), c0116g.size(), charset);
+    }
+
+    @Override // java.util.AbstractCollection, java.util.Collection, java.util.List
+    public final int size() {
+        return this.f2846b.size();
+    }
+
+    public C(ArrayList arrayList) {
+        this.f2846b = arrayList;
+    }
+
+    @Override // androidx.datastore.preferences.protobuf.AbstractC0110b, java.util.AbstractList, java.util.List
+    public final boolean addAll(int i, Collection collection) {
+        a();
+        if (collection instanceof D) {
+            collection = ((D) collection).getUnderlyingElements();
+        }
+        boolean addAll = this.f2846b.addAll(i, collection);
+        ((AbstractList) this).modCount++;
+        return addAll;
+    }
+}