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/c0/C0280f.java

@@ -0,0 +1,113 @@
+package c0;
+
+import com.google.firebase.remoteconfig.FirebaseRemoteConfig;
+
+/* renamed from: c0.f, reason: case insensitive filesystem */
+/* loaded from: classes.dex */
+public final class C0280f {
+
+    /* renamed from: a, reason: collision with root package name */
+    public double f4220a;
+
+    /* renamed from: b, reason: collision with root package name */
+    public double f4221b;
+
+    /* renamed from: c, reason: collision with root package name */
+    public boolean f4222c;
+
+    /* renamed from: d, reason: collision with root package name */
+    public double f4223d;
+
+    /* renamed from: e, reason: collision with root package name */
+    public double f4224e;
+
+    /* renamed from: f, reason: collision with root package name */
+    public double f4225f;
+
+    /* renamed from: g, reason: collision with root package name */
+    public double f4226g;
+    public double h;
+    public double i;
+
+    /* renamed from: j, reason: collision with root package name */
+    public final C0277c f4227j;
+
+    /* JADX WARN: Type inference failed for: r0v5, types: [java.lang.Object, c0.c] */
+    public C0280f() {
+        this.f4220a = Math.sqrt(1500.0d);
+        this.f4221b = 0.5d;
+        this.f4222c = false;
+        this.i = Double.MAX_VALUE;
+        this.f4227j = new Object();
+    }
+
+    public final C0277c a(double d4, double d5, long j4) {
+        double sin;
+        double cos;
+        if (!this.f4222c) {
+            if (this.i == Double.MAX_VALUE) {
+                throw new IllegalStateException("Error: Final position of the spring must be set before the animation starts");
+            }
+            double d6 = this.f4221b;
+            if (d6 > 1.0d) {
+                double d7 = this.f4220a;
+                this.f4225f = (Math.sqrt((d6 * d6) - 1.0d) * d7) + ((-d6) * d7);
+                double d8 = this.f4221b;
+                double d9 = this.f4220a;
+                this.f4226g = ((-d8) * d9) - (Math.sqrt((d8 * d8) - 1.0d) * d9);
+            } else if (d6 >= FirebaseRemoteConfig.DEFAULT_VALUE_FOR_DOUBLE && d6 < 1.0d) {
+                this.h = Math.sqrt(1.0d - (d6 * d6)) * this.f4220a;
+            }
+            this.f4222c = true;
+        }
+        double d10 = j4 / 1000.0d;
+        double d11 = d4 - this.i;
+        double d12 = this.f4221b;
+        if (d12 > 1.0d) {
+            double d13 = this.f4226g;
+            double d14 = ((d13 * d11) - d5) / (d13 - this.f4225f);
+            double d15 = d11 - d14;
+            sin = (Math.pow(2.718281828459045d, this.f4225f * d10) * d14) + (Math.pow(2.718281828459045d, d13 * d10) * d15);
+            double d16 = this.f4226g;
+            double pow = Math.pow(2.718281828459045d, d16 * d10) * d15 * d16;
+            double d17 = this.f4225f;
+            cos = (Math.pow(2.718281828459045d, d17 * d10) * d14 * d17) + pow;
+        } else if (d12 == 1.0d) {
+            double d18 = this.f4220a;
+            double d19 = (d18 * d11) + d5;
+            double d20 = (d19 * d10) + d11;
+            double pow2 = Math.pow(2.718281828459045d, (-d18) * d10) * d20;
+            double pow3 = Math.pow(2.718281828459045d, (-this.f4220a) * d10) * d20;
+            double d21 = -this.f4220a;
+            cos = (Math.pow(2.718281828459045d, d21 * d10) * d19) + (pow3 * d21);
+            sin = pow2;
+        } else {
+            double d22 = 1.0d / this.h;
+            double d23 = this.f4220a;
+            double d24 = ((d12 * d23 * d11) + d5) * d22;
+            sin = ((Math.sin(this.h * d10) * d24) + (Math.cos(this.h * d10) * d11)) * Math.pow(2.718281828459045d, (-d12) * d23 * d10);
+            double d25 = this.f4220a;
+            double d26 = this.f4221b;
+            double d27 = (-d25) * sin * d26;
+            double pow4 = Math.pow(2.718281828459045d, (-d26) * d25 * d10);
+            double d28 = this.h;
+            double sin2 = Math.sin(d28 * d10) * (-d28) * d11;
+            double d29 = this.h;
+            cos = (((Math.cos(d29 * d10) * d24 * d29) + sin2) * pow4) + d27;
+        }
+        float f2 = (float) (sin + this.i);
+        C0277c c0277c = this.f4227j;
+        c0277c.f4206a = f2;
+        c0277c.f4207b = (float) cos;
+        return c0277c;
+    }
+
+    /* JADX WARN: Type inference failed for: r0v4, types: [java.lang.Object, c0.c] */
+    public C0280f(float f2) {
+        this.f4220a = Math.sqrt(1500.0d);
+        this.f4221b = 0.5d;
+        this.f4222c = false;
+        this.f4227j = new Object();
+        this.i = f2;
+    }
+}