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/d0/t.java

@@ -0,0 +1,93 @@
+package d0;
+
+import O.I;
+import java.nio.ByteBuffer;
+
+/* loaded from: classes.dex */
+public final class t {
+
+    /* renamed from: d, reason: collision with root package name */
+    public static final ThreadLocal f6154d = new ThreadLocal();
+
+    /* renamed from: a, reason: collision with root package name */
+    public final int f6155a;
+
+    /* renamed from: b, reason: collision with root package name */
+    public final A.j f6156b;
+
+    /* renamed from: c, reason: collision with root package name */
+    public volatile int f6157c = 0;
+
+    public t(A.j jVar, int i) {
+        this.f6156b = jVar;
+        this.f6155a = i;
+    }
+
+    public final int a(int i) {
+        e0.a b4 = b();
+        int a2 = b4.a(16);
+        if (a2 == 0) {
+            return 0;
+        }
+        ByteBuffer byteBuffer = (ByteBuffer) b4.f1221d;
+        int i4 = a2 + b4.f1218a;
+        return byteBuffer.getInt((i * 4) + byteBuffer.getInt(i4) + i4 + 4);
+    }
+
+    /* JADX WARN: Multi-variable type inference failed */
+    /* JADX WARN: Type inference failed for: r1v3, types: [java.lang.Object, O.I] */
+    public final e0.a b() {
+        ThreadLocal threadLocal = f6154d;
+        e0.a aVar = (e0.a) threadLocal.get();
+        e0.a aVar2 = aVar;
+        if (aVar == null) {
+            ?? i = new I();
+            threadLocal.set(i);
+            aVar2 = i;
+        }
+        e0.b bVar = (e0.b) this.f6156b.f27a;
+        int a2 = bVar.a(6);
+        if (a2 != 0) {
+            int i4 = a2 + bVar.f1218a;
+            int i5 = (this.f6155a * 4) + ((ByteBuffer) bVar.f1221d).getInt(i4) + i4 + 4;
+            int i6 = ((ByteBuffer) bVar.f1221d).getInt(i5) + i5;
+            ByteBuffer byteBuffer = (ByteBuffer) bVar.f1221d;
+            aVar2.f1221d = byteBuffer;
+            if (byteBuffer != null) {
+                aVar2.f1218a = i6;
+                int i7 = i6 - byteBuffer.getInt(i6);
+                aVar2.f1219b = i7;
+                aVar2.f1220c = ((ByteBuffer) aVar2.f1221d).getShort(i7);
+                return aVar2;
+            }
+            aVar2.f1218a = 0;
+            aVar2.f1219b = 0;
+            aVar2.f1220c = 0;
+        }
+        return aVar2;
+    }
+
+    public final String toString() {
+        int i;
+        StringBuilder sb = new StringBuilder();
+        sb.append(super.toString());
+        sb.append(", id:");
+        e0.a b4 = b();
+        int a2 = b4.a(4);
+        sb.append(Integer.toHexString(a2 != 0 ? ((ByteBuffer) b4.f1221d).getInt(a2 + b4.f1218a) : 0));
+        sb.append(", codepoints:");
+        e0.a b5 = b();
+        int a4 = b5.a(16);
+        if (a4 != 0) {
+            int i4 = a4 + b5.f1218a;
+            i = ((ByteBuffer) b5.f1221d).getInt(((ByteBuffer) b5.f1221d).getInt(i4) + i4);
+        } else {
+            i = 0;
+        }
+        for (int i5 = 0; i5 < i; i5++) {
+            sb.append(Integer.toHexString(a(i5)));
+            sb.append(" ");
+        }
+        return sb.toString();
+    }
+}