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/LongSaturatedMathKt.java

@@ -0,0 +1,81 @@
+package kotlin.time;
+
+import kotlin.Metadata;
+import kotlin.jvm.internal.Intrinsics;
+import kotlin.jvm.internal.LongCompanionObject;
+import kotlin.jvm.internal.SourceDebugExtension;
+import kotlin.time.Duration;
+
+@Metadata(d1 = {"\u0000 \n\u0000\n\u0002\u0010\t\n\u0002\b\u0002\n\u0002\u0018\u0002\n\u0002\b\u0007\n\u0002\u0018\u0002\n\u0002\b\u000f\n\u0002\u0010\u000b\n\u0000\u001a'\u0010\u0000\u001a\u00020\u00012\u0006\u0010\u0002\u001a\u00020\u00012\u0006\u0010\u0003\u001a\u00020\u00042\u0006\u0010\u0005\u001a\u00020\u0001H\u0002¢\u0006\u0004\b\u0006\u0010\u0007\u001a\u0015\u0010\b\u001a\u00020\u00042\u0006\u0010\u0002\u001a\u00020\u0001H\u0002¢\u0006\u0002\u0010\t\u001a'\u0010\n\u001a\u00020\u00012\u0006\u0010\u0002\u001a\u00020\u00012\u0006\u0010\u000b\u001a\u00020\f2\u0006\u0010\u0003\u001a\u00020\u0004H\u0000¢\u0006\u0004\b\r\u0010\u000e\u001a'\u0010\u000f\u001a\u00020\u00012\u0006\u0010\u0002\u001a\u00020\u00012\u0006\u0010\u000b\u001a\u00020\f2\u0006\u0010\u0003\u001a\u00020\u0004H\u0002¢\u0006\u0004\b\u0010\u0010\u000e\u001a%\u0010\u0011\u001a\u00020\u00042\u0006\u0010\u0012\u001a\u00020\u00012\u0006\u0010\u0013\u001a\u00020\u00012\u0006\u0010\u000b\u001a\u00020\fH\u0000¢\u0006\u0002\u0010\u0014\u001a%\u0010\u0015\u001a\u00020\u00042\u0006\u0010\u0016\u001a\u00020\u00012\u0006\u0010\u0017\u001a\u00020\u00012\u0006\u0010\u000b\u001a\u00020\fH\u0002¢\u0006\u0002\u0010\u0014\u001a%\u0010\u0018\u001a\u00020\u00042\u0006\u0010\u0019\u001a\u00020\u00012\u0006\u0010\u001a\u001a\u00020\u00012\u0006\u0010\u000b\u001a\u00020\fH\u0000¢\u0006\u0002\u0010\u0014\u001a\r\u0010\u001b\u001a\u00020\u001c*\u00020\u0001H\u0080\b¨\u0006\u001d"}, d2 = {"checkInfiniteSumDefined", "", "value", "duration", "Lkotlin/time/Duration;", "durationInUnit", "checkInfiniteSumDefined-PjuGub4", "(JJJ)J", "infinityOfSign", "(J)J", "saturatingAdd", "unit", "Lkotlin/time/DurationUnit;", "saturatingAdd-NuflL3o", "(JLkotlin/time/DurationUnit;J)J", "saturatingAddInHalves", "saturatingAddInHalves-NuflL3o", "saturatingDiff", "valueNs", "origin", "(JJLkotlin/time/DurationUnit;)J", "saturatingFiniteDiff", "value1", "value2", "saturatingOriginsDiff", "origin1", "origin2", "isSaturated", "", "kotlin-stdlib"}, k = 2, mv = {1, 9, 0}, xi = 48)
+@SourceDebugExtension({"SMAP\nlongSaturatedMath.kt\nKotlin\n*S Kotlin\n*F\n+ 1 longSaturatedMath.kt\nkotlin/time/LongSaturatedMathKt\n*L\n1#1,81:1\n80#1:82\n80#1:83\n80#1:84\n80#1:85\n80#1:86\n80#1:87\n*S KotlinDebug\n*F\n+ 1 longSaturatedMath.kt\nkotlin/time/LongSaturatedMathKt\n*L\n14#1:82\n17#1:83\n36#1:84\n46#1:85\n53#1:86\n57#1:87\n*E\n"})
+/* loaded from: classes3.dex */
+public final class LongSaturatedMathKt {
+    /* renamed from: checkInfiniteSumDefined-PjuGub4, reason: not valid java name */
+    private static final long m1583checkInfiniteSumDefinedPjuGub4(long j4, long j5, long j6) {
+        if (!Duration.m1487isInfiniteimpl(j5) || (j4 ^ j6) >= 0) {
+            return j4;
+        }
+        throw new IllegalArgumentException("Summing infinities of different signs");
+    }
+
+    private static final long infinityOfSign(long j4) {
+        return j4 < 0 ? Duration.INSTANCE.m1557getNEG_INFINITEUwyO8pc$kotlin_stdlib() : Duration.INSTANCE.m1556getINFINITEUwyO8pc();
+    }
+
+    public static final boolean isSaturated(long j4) {
+        return ((j4 - 1) | 1) == LongCompanionObject.MAX_VALUE;
+    }
+
+    /* renamed from: saturatingAdd-NuflL3o, reason: not valid java name */
+    public static final long m1584saturatingAddNuflL3o(long j4, DurationUnit unit, long j5) {
+        Intrinsics.checkNotNullParameter(unit, "unit");
+        long m1501toLongimpl = Duration.m1501toLongimpl(j5, unit);
+        if (((j4 - 1) | 1) == LongCompanionObject.MAX_VALUE) {
+            return m1583checkInfiniteSumDefinedPjuGub4(j4, j5, m1501toLongimpl);
+        }
+        if (((m1501toLongimpl - 1) | 1) == LongCompanionObject.MAX_VALUE) {
+            return m1585saturatingAddInHalvesNuflL3o(j4, unit, j5);
+        }
+        long j6 = j4 + m1501toLongimpl;
+        if (((j4 ^ j6) & (m1501toLongimpl ^ j6)) >= 0) {
+            return j6;
+        }
+        if (j4 < 0) {
+            return Long.MIN_VALUE;
+        }
+        return LongCompanionObject.MAX_VALUE;
+    }
+
+    /* renamed from: saturatingAddInHalves-NuflL3o, reason: not valid java name */
+    private static final long m1585saturatingAddInHalvesNuflL3o(long j4, DurationUnit durationUnit, long j5) {
+        long m1458divUwyO8pc = Duration.m1458divUwyO8pc(j5, 2);
+        long m1501toLongimpl = Duration.m1501toLongimpl(m1458divUwyO8pc, durationUnit);
+        return (1 | (m1501toLongimpl - 1)) == LongCompanionObject.MAX_VALUE ? m1501toLongimpl : m1584saturatingAddNuflL3o(m1584saturatingAddNuflL3o(j4, durationUnit, m1458divUwyO8pc), durationUnit, Duration.m1490minusLRDsOJo(j5, m1458divUwyO8pc));
+    }
+
+    public static final long saturatingDiff(long j4, long j5, DurationUnit unit) {
+        Intrinsics.checkNotNullParameter(unit, "unit");
+        return (1 | (j5 - 1)) == LongCompanionObject.MAX_VALUE ? Duration.m1508unaryMinusUwyO8pc(infinityOfSign(j5)) : saturatingFiniteDiff(j4, j5, unit);
+    }
+
+    private static final long saturatingFiniteDiff(long j4, long j5, DurationUnit durationUnit) {
+        long j6 = j4 - j5;
+        if (((j6 ^ j4) & (~(j6 ^ j5))) >= 0) {
+            return DurationKt.toDuration(j6, durationUnit);
+        }
+        DurationUnit durationUnit2 = DurationUnit.MILLISECONDS;
+        if (durationUnit.compareTo(durationUnit2) >= 0) {
+            return Duration.m1508unaryMinusUwyO8pc(infinityOfSign(j6));
+        }
+        long convertDurationUnit = DurationUnitKt__DurationUnitJvmKt.convertDurationUnit(1L, durationUnit2, durationUnit);
+        long j7 = (j4 / convertDurationUnit) - (j5 / convertDurationUnit);
+        long j8 = (j4 % convertDurationUnit) - (j5 % convertDurationUnit);
+        Duration.Companion companion = Duration.INSTANCE;
+        return Duration.m1491plusLRDsOJo(DurationKt.toDuration(j7, durationUnit2), DurationKt.toDuration(j8, durationUnit));
+    }
+
+    public static final long saturatingOriginsDiff(long j4, long j5, DurationUnit unit) {
+        Intrinsics.checkNotNullParameter(unit, "unit");
+        return ((j5 - 1) | 1) == LongCompanionObject.MAX_VALUE ? j4 == j5 ? Duration.INSTANCE.m1558getZEROUwyO8pc() : Duration.m1508unaryMinusUwyO8pc(infinityOfSign(j5)) : (1 | (j4 - 1)) == LongCompanionObject.MAX_VALUE ? infinityOfSign(j4) : saturatingFiniteDiff(j4, j5, unit);
+    }
+}