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/e3/A.java

@@ -0,0 +1,85 @@
+package e3;
+
+import java.util.regex.Pattern;
+import kotlin.jvm.internal.Intrinsics;
+
+/* loaded from: classes3.dex */
+public final class A {
+
+    /* renamed from: d, reason: collision with root package name */
+    public static final Pattern f6197d = Pattern.compile("([a-zA-Z0-9-!#$%&'*+.^_`{|}~]+)/([a-zA-Z0-9-!#$%&'*+.^_`{|}~]+)");
+
+    /* renamed from: e, reason: collision with root package name */
+    public static final Pattern f6198e = Pattern.compile(";\\s*(?:([a-zA-Z0-9-!#$%&'*+.^_`{|}~]+)=(?:([a-zA-Z0-9-!#$%&'*+.^_`{|}~]+)|\"([^\"]*)\"))?");
+
+    /* renamed from: a, reason: collision with root package name */
+    public final String f6199a;
+
+    /* renamed from: b, reason: collision with root package name */
+    public final String f6200b;
+
+    /* renamed from: c, reason: collision with root package name */
+    public final String[] f6201c;
+
+    public A(String str, String str2, String[] strArr) {
+        this.f6199a = str;
+        this.f6200b = str2;
+        this.f6201c = strArr;
+    }
+
+    /* JADX WARN: Incorrect condition in loop: B:4:0x001a */
+    /* JADX WARN: Removed duplicated region for block: B:11:0x002a A[EXC_TOP_SPLITTER, SYNTHETIC] */
+    /*
+        Code decompiled incorrectly, please refer to instructions dump.
+        To view partially-correct add '--show-bad-code' argument
+    */
+    public final java.nio.charset.Charset a(java.nio.charset.Charset r5) {
+        /*
+            r4 = this;
+            java.lang.String r0 = "charset"
+            java.lang.String r1 = "name"
+            kotlin.jvm.internal.Intrinsics.checkNotNullParameter(r0, r1)
+            java.lang.String[] r4 = r4.f6201c
+            int r1 = r4.length
+            int r1 = r1 + (-1)
+            r2 = 0
+            r3 = 2
+            int r1 = kotlin.internal.ProgressionUtilKt.getProgressionLastElement(r2, r1, r3)
+            if (r1 < 0) goto L26
+        L14:
+            r3 = r4[r2]
+            boolean r3 = kotlin.text.StringsKt.j(r3, r0)
+            if (r3 == 0) goto L21
+            int r2 = r2 + 1
+            r4 = r4[r2]
+            goto L27
+        L21:
+            if (r2 == r1) goto L26
+            int r2 = r2 + 2
+            goto L14
+        L26:
+            r4 = 0
+        L27:
+            if (r4 != 0) goto L2a
+            goto L2f
+        L2a:
+            java.nio.charset.Charset r4 = java.nio.charset.Charset.forName(r4)     // Catch: java.lang.IllegalArgumentException -> L2f
+            return r4
+        L2f:
+            return r5
+        */
+        throw new UnsupportedOperationException("Method not decompiled: e3.A.a(java.nio.charset.Charset):java.nio.charset.Charset");
+    }
+
+    public final boolean equals(Object obj) {
+        return (obj instanceof A) && Intrinsics.areEqual(((A) obj).f6199a, this.f6199a);
+    }
+
+    public final int hashCode() {
+        return this.f6199a.hashCode();
+    }
+
+    public final String toString() {
+        return this.f6199a;
+    }
+}