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/MonotonicTimeSource.java

@@ -0,0 +1,54 @@
+package kotlin.time;
+
+import kotlin.Metadata;
+import kotlin.SinceKotlin;
+import kotlin.time.TimeSource;
+
+@SinceKotlin(version = "1.3")
+@Metadata(d1 = {"\u0000(\n\u0002\u0018\u0002\n\u0002\u0018\u0002\n\u0002\b\u0002\n\u0002\u0010\t\n\u0000\n\u0002\u0018\u0002\n\u0002\b\u0002\n\u0002\u0018\u0002\n\u0002\b\u000e\n\u0002\u0010\u000e\n\u0000\bÁ\u0002\u0018\u00002\u00020\u0001B\u0007\b\u0002¢\u0006\u0002\u0010\u0002J\u001d\u0010\u0005\u001a\u00020\u00062\u0006\u0010\u0007\u001a\u00020\u00062\u0006\u0010\b\u001a\u00020\t¢\u0006\u0004\b\n\u0010\u000bJ\u001d\u0010\f\u001a\u00020\t2\u0006\u0010\r\u001a\u00020\u00062\u0006\u0010\u000e\u001a\u00020\u0006¢\u0006\u0004\b\u000f\u0010\u000bJ\u0015\u0010\u0010\u001a\u00020\t2\u0006\u0010\u0007\u001a\u00020\u0006¢\u0006\u0004\b\u0011\u0010\u0012J\u0012\u0010\u0013\u001a\u00020\u0006H\u0016ø\u0001\u0000¢\u0006\u0004\b\u0014\u0010\u0015J\b\u0010\u0016\u001a\u00020\u0004H\u0002J\b\u0010\u0017\u001a\u00020\u0018H\u0016R\u000e\u0010\u0003\u001a\u00020\u0004X\u0082\u0004¢\u0006\u0002\n\u0000\u0082\u0002\u0004\n\u0002\b!¨\u0006\u0019"}, d2 = {"Lkotlin/time/MonotonicTimeSource;", "Lkotlin/time/TimeSource$WithComparableMarks;", "()V", "zero", "", "adjustReading", "Lkotlin/time/TimeSource$Monotonic$ValueTimeMark;", "timeMark", "duration", "Lkotlin/time/Duration;", "adjustReading-6QKq23U", "(JJ)J", "differenceBetween", "one", "another", "differenceBetween-fRLX17w", "elapsedFrom", "elapsedFrom-6eNON_k", "(J)J", "markNow", "markNow-z9LOYto", "()J", "read", "toString", "", "kotlin-stdlib"}, k = 1, mv = {1, 9, 0}, xi = 48)
+/* loaded from: classes3.dex */
+public final class MonotonicTimeSource implements TimeSource.WithComparableMarks {
+    public static final MonotonicTimeSource INSTANCE = new MonotonicTimeSource();
+    private static final long zero = System.nanoTime();
+
+    private MonotonicTimeSource() {
+    }
+
+    private final long read() {
+        return System.nanoTime() - zero;
+    }
+
+    /* renamed from: adjustReading-6QKq23U, reason: not valid java name */
+    public final long m1586adjustReading6QKq23U(long timeMark, long duration) {
+        return TimeSource.Monotonic.ValueTimeMark.m1598constructorimpl(LongSaturatedMathKt.m1584saturatingAddNuflL3o(timeMark, DurationUnit.NANOSECONDS, duration));
+    }
+
+    /* renamed from: differenceBetween-fRLX17w, reason: not valid java name */
+    public final long m1587differenceBetweenfRLX17w(long one, long another) {
+        return LongSaturatedMathKt.saturatingOriginsDiff(one, another, DurationUnit.NANOSECONDS);
+    }
+
+    /* renamed from: elapsedFrom-6eNON_k, reason: not valid java name */
+    public final long m1588elapsedFrom6eNON_k(long timeMark) {
+        return LongSaturatedMathKt.saturatingDiff(read(), timeMark, DurationUnit.NANOSECONDS);
+    }
+
+    @Override // kotlin.time.TimeSource.WithComparableMarks, kotlin.time.TimeSource
+    public /* bridge */ /* synthetic */ ComparableTimeMark markNow() {
+        return TimeSource.Monotonic.ValueTimeMark.m1595boximpl(m1589markNowz9LOYto());
+    }
+
+    /* renamed from: markNow-z9LOYto, reason: not valid java name */
+    public long m1589markNowz9LOYto() {
+        return TimeSource.Monotonic.ValueTimeMark.m1598constructorimpl(read());
+    }
+
+    public String toString() {
+        return "TimeSource(System.nanoTime())";
+    }
+
+    @Override // kotlin.time.TimeSource
+    public /* bridge */ /* synthetic */ TimeMark markNow() {
+        return TimeSource.Monotonic.ValueTimeMark.m1595boximpl(m1589markNowz9LOYto());
+    }
+}