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/f0/C0343g.java

@@ -0,0 +1,94 @@
+package f0;
+
+import android.text.InputFilter;
+import android.text.method.PasswordTransformationMethod;
+import android.text.method.TransformationMethod;
+import android.util.SparseArray;
+import android.widget.TextView;
+import m3.l;
+
+/* renamed from: f0.g, reason: case insensitive filesystem */
+/* loaded from: classes.dex */
+public final class C0343g extends l {
+
+    /* renamed from: a, reason: collision with root package name */
+    public final TextView f6457a;
+
+    /* renamed from: b, reason: collision with root package name */
+    public final C0341e f6458b;
+
+    /* renamed from: c, reason: collision with root package name */
+    public boolean f6459c = true;
+
+    public C0343g(TextView textView) {
+        this.f6457a = textView;
+        this.f6458b = new C0341e(textView);
+    }
+
+    @Override // m3.l
+    public final boolean F() {
+        return this.f6459c;
+    }
+
+    @Override // m3.l
+    public final void W(boolean z3) {
+        if (z3) {
+            TextView textView = this.f6457a;
+            textView.setTransformationMethod(e0(textView.getTransformationMethod()));
+        }
+    }
+
+    @Override // m3.l
+    public final void X(boolean z3) {
+        this.f6459c = z3;
+        TextView textView = this.f6457a;
+        textView.setTransformationMethod(e0(textView.getTransformationMethod()));
+        textView.setFilters(u(textView.getFilters()));
+    }
+
+    @Override // m3.l
+    public final TransformationMethod e0(TransformationMethod transformationMethod) {
+        return this.f6459c ? ((transformationMethod instanceof k) || (transformationMethod instanceof PasswordTransformationMethod)) ? transformationMethod : new k(transformationMethod) : transformationMethod instanceof k ? ((k) transformationMethod).f6466a : transformationMethod;
+    }
+
+    @Override // m3.l
+    public final InputFilter[] u(InputFilter[] inputFilterArr) {
+        if (!this.f6459c) {
+            SparseArray sparseArray = new SparseArray(1);
+            for (int i = 0; i < inputFilterArr.length; i++) {
+                InputFilter inputFilter = inputFilterArr[i];
+                if (inputFilter instanceof C0341e) {
+                    sparseArray.put(i, inputFilter);
+                }
+            }
+            if (sparseArray.size() == 0) {
+                return inputFilterArr;
+            }
+            int length = inputFilterArr.length;
+            InputFilter[] inputFilterArr2 = new InputFilter[inputFilterArr.length - sparseArray.size()];
+            int i4 = 0;
+            for (int i5 = 0; i5 < length; i5++) {
+                if (sparseArray.indexOfKey(i5) < 0) {
+                    inputFilterArr2[i4] = inputFilterArr[i5];
+                    i4++;
+                }
+            }
+            return inputFilterArr2;
+        }
+        int length2 = inputFilterArr.length;
+        int i6 = 0;
+        while (true) {
+            C0341e c0341e = this.f6458b;
+            if (i6 >= length2) {
+                InputFilter[] inputFilterArr3 = new InputFilter[inputFilterArr.length + 1];
+                System.arraycopy(inputFilterArr, 0, inputFilterArr3, 0, length2);
+                inputFilterArr3[length2] = c0341e;
+                return inputFilterArr3;
+            }
+            if (inputFilterArr[i6] == c0341e) {
+                return inputFilterArr;
+            }
+            i6++;
+        }
+    }
+}