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/DurationUnitKt__DurationUnitKt.java

@@ -0,0 +1,126 @@
+package kotlin.time;
+
+import kotlin.Metadata;
+import kotlin.SinceKotlin;
+import kotlin.jvm.internal.Intrinsics;
+
+@Metadata(d1 = {"\u0000\u001c\n\u0000\n\u0002\u0018\u0002\n\u0000\n\u0002\u0010\f\n\u0000\n\u0002\u0010\u000b\n\u0002\b\u0002\n\u0002\u0010\u000e\n\u0000\u001a\u0018\u0010\u0000\u001a\u00020\u00012\u0006\u0010\u0002\u001a\u00020\u00032\u0006\u0010\u0004\u001a\u00020\u0005H\u0001\u001a\u0010\u0010\u0006\u001a\u00020\u00012\u0006\u0010\u0007\u001a\u00020\bH\u0001\u001a\f\u0010\u0007\u001a\u00020\b*\u00020\u0001H\u0001¨\u0006\t"}, d2 = {"durationUnitByIsoChar", "Lkotlin/time/DurationUnit;", "isoChar", "", "isTimeComponent", "", "durationUnitByShortName", "shortName", "", "kotlin-stdlib"}, k = 5, mv = {1, 9, 0}, xi = 49, xs = "kotlin/time/DurationUnitKt")
+/* loaded from: classes3.dex */
+class DurationUnitKt__DurationUnitKt extends DurationUnitKt__DurationUnitJvmKt {
+
+    @Metadata(k = 3, mv = {1, 9, 0}, xi = 48)
+    /* loaded from: classes3.dex */
+    public /* synthetic */ class WhenMappings {
+        public static final /* synthetic */ int[] $EnumSwitchMapping$0;
+
+        static {
+            int[] iArr = new int[DurationUnit.values().length];
+            try {
+                iArr[DurationUnit.NANOSECONDS.ordinal()] = 1;
+            } catch (NoSuchFieldError unused) {
+            }
+            try {
+                iArr[DurationUnit.MICROSECONDS.ordinal()] = 2;
+            } catch (NoSuchFieldError unused2) {
+            }
+            try {
+                iArr[DurationUnit.MILLISECONDS.ordinal()] = 3;
+            } catch (NoSuchFieldError unused3) {
+            }
+            try {
+                iArr[DurationUnit.SECONDS.ordinal()] = 4;
+            } catch (NoSuchFieldError unused4) {
+            }
+            try {
+                iArr[DurationUnit.MINUTES.ordinal()] = 5;
+            } catch (NoSuchFieldError unused5) {
+            }
+            try {
+                iArr[DurationUnit.HOURS.ordinal()] = 6;
+            } catch (NoSuchFieldError unused6) {
+            }
+            try {
+                iArr[DurationUnit.DAYS.ordinal()] = 7;
+            } catch (NoSuchFieldError unused7) {
+            }
+            $EnumSwitchMapping$0 = iArr;
+        }
+    }
+
+    @SinceKotlin(version = "1.5")
+    public static final DurationUnit durationUnitByIsoChar(char c4, boolean z3) {
+        if (!z3) {
+            if (c4 == 'D') {
+                return DurationUnit.DAYS;
+            }
+            throw new IllegalArgumentException("Invalid or unsupported duration ISO non-time unit: " + c4);
+        }
+        if (c4 == 'H') {
+            return DurationUnit.HOURS;
+        }
+        if (c4 == 'M') {
+            return DurationUnit.MINUTES;
+        }
+        if (c4 == 'S') {
+            return DurationUnit.SECONDS;
+        }
+        throw new IllegalArgumentException("Invalid duration ISO time unit: " + c4);
+    }
+
+    @SinceKotlin(version = "1.5")
+    public static final DurationUnit durationUnitByShortName(String shortName) {
+        Intrinsics.checkNotNullParameter(shortName, "shortName");
+        int hashCode = shortName.hashCode();
+        if (hashCode != 100) {
+            if (hashCode != 104) {
+                if (hashCode != 109) {
+                    if (hashCode != 115) {
+                        if (hashCode != 3494) {
+                            if (hashCode != 3525) {
+                                if (hashCode == 3742 && shortName.equals("us")) {
+                                    return DurationUnit.MICROSECONDS;
+                                }
+                            } else if (shortName.equals("ns")) {
+                                return DurationUnit.NANOSECONDS;
+                            }
+                        } else if (shortName.equals("ms")) {
+                            return DurationUnit.MILLISECONDS;
+                        }
+                    } else if (shortName.equals("s")) {
+                        return DurationUnit.SECONDS;
+                    }
+                } else if (shortName.equals("m")) {
+                    return DurationUnit.MINUTES;
+                }
+            } else if (shortName.equals("h")) {
+                return DurationUnit.HOURS;
+            }
+        } else if (shortName.equals("d")) {
+            return DurationUnit.DAYS;
+        }
+        throw new IllegalArgumentException("Unknown duration unit short name: ".concat(shortName));
+    }
+
+    @SinceKotlin(version = "1.3")
+    public static final String shortName(DurationUnit durationUnit) {
+        Intrinsics.checkNotNullParameter(durationUnit, "<this>");
+        switch (WhenMappings.$EnumSwitchMapping$0[durationUnit.ordinal()]) {
+            case 1:
+                return "ns";
+            case 2:
+                return "us";
+            case 3:
+                return "ms";
+            case 4:
+                return "s";
+            case 5:
+                return "m";
+            case 6:
+                return "h";
+            case 7:
+                return "d";
+            default:
+                throw new IllegalStateException(("Unknown unit: " + durationUnit).toString());
+        }
+    }
+}