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/time/TestTimeSource.java

@@ -0,0 +1,59 @@
+package kotlin.time;
+
+import kotlin.Metadata;
+import kotlin.SinceKotlin;
+import kotlin.WasExperimental;
+import kotlin.jvm.internal.LongCompanionObject;
+import kotlin.jvm.internal.SourceDebugExtension;
+
+@SinceKotlin(version = "1.9")
+@Metadata(d1 = {"\u0000 \n\u0002\u0018\u0002\n\u0002\u0018\u0002\n\u0002\b\u0002\n\u0002\u0010\t\n\u0000\n\u0002\u0010\u0002\n\u0000\n\u0002\u0018\u0002\n\u0002\b\u0006\b\u0007\u0018\u00002\u00020\u0001B\u0005¢\u0006\u0002\u0010\u0002J\u0017\u0010\u0005\u001a\u00020\u00062\u0006\u0010\u0007\u001a\u00020\bH\u0002¢\u0006\u0004\b\t\u0010\nJ\u0018\u0010\u000b\u001a\u00020\u00062\u0006\u0010\u0007\u001a\u00020\bH\u0086\u0002¢\u0006\u0004\b\f\u0010\nJ\b\u0010\r\u001a\u00020\u0004H\u0014R\u000e\u0010\u0003\u001a\u00020\u0004X\u0082\u000e¢\u0006\u0002\n\u0000¨\u0006\u000e"}, d2 = {"Lkotlin/time/TestTimeSource;", "Lkotlin/time/AbstractLongTimeSource;", "()V", "reading", "", "overflow", "", "duration", "Lkotlin/time/Duration;", "overflow-LRDsOJo", "(J)V", "plusAssign", "plusAssign-LRDsOJo", "read", "kotlin-stdlib"}, k = 1, mv = {1, 9, 0}, xi = 48)
+@WasExperimental(markerClass = {ExperimentalTime.class})
+@SourceDebugExtension({"SMAP\nTimeSources.kt\nKotlin\n*S Kotlin\n*F\n+ 1 TimeSources.kt\nkotlin/time/TestTimeSource\n+ 2 longSaturatedMath.kt\nkotlin/time/LongSaturatedMathKt\n*L\n1#1,199:1\n80#2:200\n80#2:201\n*S KotlinDebug\n*F\n+ 1 TimeSources.kt\nkotlin/time/TestTimeSource\n*L\n173#1:200\n180#1:201\n*E\n"})
+/* loaded from: classes3.dex */
+public final class TestTimeSource extends AbstractLongTimeSource {
+    private long reading;
+
+    public TestTimeSource() {
+        super(DurationUnit.NANOSECONDS);
+        markNow();
+    }
+
+    /* renamed from: overflow-LRDsOJo, reason: not valid java name */
+    private final void m1590overflowLRDsOJo(long duration) {
+        throw new IllegalStateException("TestTimeSource will overflow if its reading " + this.reading + DurationUnitKt__DurationUnitKt.shortName(getUnit()) + " is advanced by " + ((Object) Duration.m1504toStringimpl(duration)) + '.');
+    }
+
+    /* renamed from: plusAssign-LRDsOJo, reason: not valid java name */
+    public final void m1591plusAssignLRDsOJo(long duration) {
+        long m1501toLongimpl = Duration.m1501toLongimpl(duration, getUnit());
+        if (((m1501toLongimpl - 1) | 1) != LongCompanionObject.MAX_VALUE) {
+            long j4 = this.reading;
+            long j5 = j4 + m1501toLongimpl;
+            if ((m1501toLongimpl ^ j4) >= 0 && (j4 ^ j5) < 0) {
+                m1590overflowLRDsOJo(duration);
+            }
+            this.reading = j5;
+            return;
+        }
+        long m1458divUwyO8pc = Duration.m1458divUwyO8pc(duration, 2);
+        if ((1 | (Duration.m1501toLongimpl(m1458divUwyO8pc, getUnit()) - 1)) == LongCompanionObject.MAX_VALUE) {
+            m1590overflowLRDsOJo(duration);
+            return;
+        }
+        long j6 = this.reading;
+        try {
+            m1591plusAssignLRDsOJo(m1458divUwyO8pc);
+            m1591plusAssignLRDsOJo(Duration.m1490minusLRDsOJo(duration, m1458divUwyO8pc));
+        } catch (IllegalStateException e4) {
+            this.reading = j6;
+            throw e4;
+        }
+    }
+
+    @Override // kotlin.time.AbstractLongTimeSource
+    /* renamed from: read, reason: from getter */
+    public long getReading() {
+        return this.reading;
+    }
+}