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/text/MatcherMatchResult$groups$1.java

@@ -0,0 +1,92 @@
+package kotlin.text;
+
+import com.google.android.gms.measurement.api.AppMeasurementSdk;
+import com.google.firebase.analytics.FirebaseAnalytics;
+import java.util.Iterator;
+import kotlin.Metadata;
+import kotlin.collections.AbstractCollection;
+import kotlin.collections.CollectionsKt;
+import kotlin.internal.PlatformImplementations;
+import kotlin.internal.PlatformImplementationsKt;
+import kotlin.jvm.functions.Function1;
+import kotlin.jvm.internal.Intrinsics;
+import kotlin.ranges.IntRange;
+import kotlin.sequences.SequencesKt;
+
+@Metadata(d1 = {"\u0000-\n\u0000\n\u0002\u0018\u0002\n\u0002\u0018\u0002\n\u0002\u0018\u0002\n\u0000\n\u0002\u0010\b\n\u0002\b\u0005\n\u0002\u0010\u000e\n\u0000\n\u0002\u0010\u000b\n\u0000\n\u0002\u0010(\n\u0000*\u0001\u0000\b\n\u0018\u00002\u00020\u00012\n\u0012\u0006\u0012\u0004\u0018\u00010\u00030\u0002J\u0013\u0010\b\u001a\u0004\u0018\u00010\u00032\u0006\u0010\t\u001a\u00020\u0005H\u0096\u0002J\u0013\u0010\b\u001a\u0004\u0018\u00010\u00032\u0006\u0010\n\u001a\u00020\u000bH\u0096\u0002J\b\u0010\f\u001a\u00020\rH\u0016J\u0011\u0010\u000e\u001a\n\u0012\u0006\u0012\u0004\u0018\u00010\u00030\u000fH\u0096\u0002R\u0014\u0010\u0004\u001a\u00020\u00058VX\u0096\u0004¢\u0006\u0006\u001a\u0004\b\u0006\u0010\u0007¨\u0006\u0010"}, d2 = {"kotlin/text/MatcherMatchResult$groups$1", "Lkotlin/text/MatchNamedGroupCollection;", "Lkotlin/collections/AbstractCollection;", "Lkotlin/text/MatchGroup;", "size", "", "getSize", "()I", "get", FirebaseAnalytics.Param.INDEX, AppMeasurementSdk.ConditionalUserProperty.NAME, "", "isEmpty", "", "iterator", "", "kotlin-stdlib"}, k = 1, mv = {1, 9, 0}, xi = 48)
+/* loaded from: classes3.dex */
+public final class MatcherMatchResult$groups$1 extends AbstractCollection<MatchGroup> implements MatchNamedGroupCollection {
+    final /* synthetic */ MatcherMatchResult this$0;
+
+    public MatcherMatchResult$groups$1(MatcherMatchResult matcherMatchResult) {
+        this.this$0 = matcherMatchResult;
+    }
+
+    @Override // kotlin.collections.AbstractCollection, java.util.Collection
+    public final /* bridge */ boolean contains(Object obj) {
+        if (obj == null ? true : obj instanceof MatchGroup) {
+            return contains((MatchGroup) obj);
+        }
+        return false;
+    }
+
+    @Override // kotlin.text.MatchGroupCollection
+    public MatchGroup get(int index) {
+        java.util.regex.MatchResult matchResult;
+        IntRange range;
+        java.util.regex.MatchResult matchResult2;
+        matchResult = this.this$0.getMatchResult();
+        range = RegexKt.range(matchResult, index);
+        if (range.getStart().intValue() < 0) {
+            return null;
+        }
+        matchResult2 = this.this$0.getMatchResult();
+        String group = matchResult2.group(index);
+        Intrinsics.checkNotNullExpressionValue(group, "group(...)");
+        return new MatchGroup(group, range);
+    }
+
+    @Override // kotlin.collections.AbstractCollection
+    /* renamed from: getSize */
+    public int get_size() {
+        java.util.regex.MatchResult matchResult;
+        matchResult = this.this$0.getMatchResult();
+        return matchResult.groupCount() + 1;
+    }
+
+    @Override // kotlin.collections.AbstractCollection, java.util.Collection
+    public boolean isEmpty() {
+        return false;
+    }
+
+    @Override // kotlin.collections.AbstractCollection, java.util.Collection, java.lang.Iterable
+    public Iterator<MatchGroup> iterator() {
+        return SequencesKt.map(CollectionsKt.asSequence(CollectionsKt.getIndices(this)), new Function1<Integer, MatchGroup>() { // from class: kotlin.text.MatcherMatchResult$groups$1$iterator$1
+            {
+                super(1);
+            }
+
+            @Override // kotlin.jvm.functions.Function1
+            public /* bridge */ /* synthetic */ MatchGroup invoke(Integer num) {
+                return invoke(num.intValue());
+            }
+
+            public final MatchGroup invoke(int i) {
+                return MatcherMatchResult$groups$1.this.get(i);
+            }
+        }).iterator();
+    }
+
+    public /* bridge */ boolean contains(MatchGroup matchGroup) {
+        return super.contains((MatcherMatchResult$groups$1) matchGroup);
+    }
+
+    @Override // kotlin.text.MatchNamedGroupCollection
+    public MatchGroup get(String name) {
+        java.util.regex.MatchResult matchResult;
+        Intrinsics.checkNotNullParameter(name, "name");
+        PlatformImplementations platformImplementations = PlatformImplementationsKt.IMPLEMENTATIONS;
+        matchResult = this.this$0.getMatchResult();
+        return platformImplementations.getMatchResultNamedGroup(matchResult, name);
+    }
+}