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/S2/l.java

@@ -0,0 +1,163 @@
+package S2;
+
+import java.util.AbstractSet;
+import java.util.Iterator;
+
+/* loaded from: classes3.dex */
+public final class l extends AbstractSet {
+
+    /* renamed from: a, reason: collision with root package name */
+    public final /* synthetic */ int f1603a;
+
+    /* renamed from: b, reason: collision with root package name */
+    public final /* synthetic */ o f1604b;
+
+    public /* synthetic */ l(o oVar, int i) {
+        this.f1603a = i;
+        this.f1604b = oVar;
+    }
+
+    @Override // java.util.AbstractCollection, java.util.Collection, java.util.Set
+    public final void clear() {
+        switch (this.f1603a) {
+            case 0:
+                this.f1604b.clear();
+                return;
+            default:
+                this.f1604b.clear();
+                return;
+        }
+    }
+
+    /* JADX WARN: Removed duplicated region for block: B:16:0x0033 A[ORIG_RETURN, RETURN] */
+    /* JADX WARN: Removed duplicated region for block: B:17:? A[RETURN, SYNTHETIC] */
+    @Override // java.util.AbstractCollection, java.util.Collection, java.util.Set
+    /*
+        Code decompiled incorrectly, please refer to instructions dump.
+        To view partially-correct add '--show-bad-code' argument
+    */
+    public final boolean contains(java.lang.Object r4) {
+        /*
+            r3 = this;
+            int r0 = r3.f1603a
+            switch(r0) {
+                case 0: goto Lc;
+                default: goto L5;
+            }
+        L5:
+            S2.o r3 = r3.f1604b
+            boolean r3 = r3.containsKey(r4)
+            return r3
+        Lc:
+            boolean r0 = r4 instanceof java.util.Map.Entry
+            r1 = 0
+            if (r0 == 0) goto L34
+            S2.o r3 = r3.f1604b
+            java.util.Map$Entry r4 = (java.util.Map.Entry) r4
+            java.lang.Object r0 = r4.getKey()
+            r2 = 0
+            if (r0 == 0) goto L21
+            S2.n r3 = r3.a(r0, r1)     // Catch: java.lang.ClassCastException -> L21
+            goto L22
+        L21:
+            r3 = r2
+        L22:
+            if (r3 == 0) goto L31
+            java.lang.Object r0 = r3.h
+            java.lang.Object r4 = r4.getValue()
+            boolean r4 = java.util.Objects.equals(r0, r4)
+            if (r4 == 0) goto L31
+            r2 = r3
+        L31:
+            if (r2 == 0) goto L34
+            r1 = 1
+        L34:
+            return r1
+        */
+        throw new UnsupportedOperationException("Method not decompiled: S2.l.contains(java.lang.Object):boolean");
+    }
+
+    @Override // java.util.AbstractCollection, java.util.Collection, java.lang.Iterable, java.util.Set
+    public final Iterator iterator() {
+        switch (this.f1603a) {
+            case 0:
+                return new k(this.f1604b, 0);
+            default:
+                return new k(this.f1604b, 1);
+        }
+    }
+
+    /* JADX WARN: Removed duplicated region for block: B:27:0x0042  */
+    /* JADX WARN: Removed duplicated region for block: B:29:? A[RETURN, SYNTHETIC] */
+    @Override // java.util.AbstractCollection, java.util.Collection, java.util.Set
+    /*
+        Code decompiled incorrectly, please refer to instructions dump.
+        To view partially-correct add '--show-bad-code' argument
+    */
+    public final boolean remove(java.lang.Object r5) {
+        /*
+            r4 = this;
+            int r0 = r4.f1603a
+            switch(r0) {
+                case 0: goto L19;
+                default: goto L5;
+            }
+        L5:
+            S2.o r4 = r4.f1604b
+            r0 = 0
+            r1 = 0
+            if (r5 == 0) goto Lf
+            S2.n r1 = r4.a(r5, r0)     // Catch: java.lang.ClassCastException -> Lf
+        Lf:
+            r5 = 1
+            if (r1 == 0) goto L15
+            r4.c(r1, r5)
+        L15:
+            if (r1 == 0) goto L18
+            r0 = r5
+        L18:
+            return r0
+        L19:
+            boolean r0 = r5 instanceof java.util.Map.Entry
+            r1 = 0
+            if (r0 != 0) goto L1f
+            goto L46
+        L1f:
+            java.util.Map$Entry r5 = (java.util.Map.Entry) r5
+            S2.o r4 = r4.f1604b
+            java.lang.Object r0 = r5.getKey()
+            r2 = 0
+            if (r0 == 0) goto L2f
+            S2.n r0 = r4.a(r0, r1)     // Catch: java.lang.ClassCastException -> L2f
+            goto L30
+        L2f:
+            r0 = r2
+        L30:
+            if (r0 == 0) goto L3f
+            java.lang.Object r3 = r0.h
+            java.lang.Object r5 = r5.getValue()
+            boolean r5 = java.util.Objects.equals(r3, r5)
+            if (r5 == 0) goto L3f
+            r2 = r0
+        L3f:
+            if (r2 != 0) goto L42
+            goto L46
+        L42:
+            r1 = 1
+            r4.c(r2, r1)
+        L46:
+            return r1
+        */
+        throw new UnsupportedOperationException("Method not decompiled: S2.l.remove(java.lang.Object):boolean");
+    }
+
+    @Override // java.util.AbstractCollection, java.util.Collection, java.util.Set
+    public final int size() {
+        switch (this.f1603a) {
+            case 0:
+                return this.f1604b.f1620d;
+            default:
+                return this.f1604b.f1620d;
+        }
+    }
+}