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/com/google/android/material/internal/BaselineLayout.java

@@ -0,0 +1,70 @@
+package com.google.android.material.internal;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.View;
+import android.view.ViewGroup;
+
+/* loaded from: classes3.dex */
+public class BaselineLayout extends ViewGroup {
+
+    /* renamed from: a, reason: collision with root package name */
+    public int f5716a;
+
+    public BaselineLayout(Context context, AttributeSet attributeSet) {
+        super(context, attributeSet, 0);
+        this.f5716a = -1;
+    }
+
+    @Override // android.view.View
+    public int getBaseline() {
+        return this.f5716a;
+    }
+
+    @Override // android.view.ViewGroup, android.view.View
+    public final void onLayout(boolean z3, int i, int i4, int i5, int i6) {
+        int childCount = getChildCount();
+        int paddingLeft = getPaddingLeft();
+        int paddingRight = ((i5 - i) - getPaddingRight()) - paddingLeft;
+        int paddingTop = getPaddingTop();
+        for (int i7 = 0; i7 < childCount; i7++) {
+            View childAt = getChildAt(i7);
+            if (childAt.getVisibility() != 8) {
+                int measuredWidth = childAt.getMeasuredWidth();
+                int measuredHeight = childAt.getMeasuredHeight();
+                int i8 = ((paddingRight - measuredWidth) / 2) + paddingLeft;
+                int baseline = (this.f5716a == -1 || childAt.getBaseline() == -1) ? paddingTop : (this.f5716a + paddingTop) - childAt.getBaseline();
+                childAt.layout(i8, baseline, measuredWidth + i8, measuredHeight + baseline);
+            }
+        }
+    }
+
+    @Override // android.view.View
+    public final void onMeasure(int i, int i4) {
+        int childCount = getChildCount();
+        int i5 = 0;
+        int i6 = 0;
+        int i7 = 0;
+        int i8 = -1;
+        int i9 = -1;
+        for (int i10 = 0; i10 < childCount; i10++) {
+            View childAt = getChildAt(i10);
+            if (childAt.getVisibility() != 8) {
+                measureChild(childAt, i, i4);
+                int baseline = childAt.getBaseline();
+                if (baseline != -1) {
+                    i8 = Math.max(i8, baseline);
+                    i9 = Math.max(i9, childAt.getMeasuredHeight() - baseline);
+                }
+                i6 = Math.max(i6, childAt.getMeasuredWidth());
+                i5 = Math.max(i5, childAt.getMeasuredHeight());
+                i7 = View.combineMeasuredStates(i7, childAt.getMeasuredState());
+            }
+        }
+        if (i8 != -1) {
+            i5 = Math.max(i5, Math.max(i9, getPaddingBottom()) + i8);
+            this.f5716a = i8;
+        }
+        setMeasuredDimension(View.resolveSizeAndState(Math.max(i6, getSuggestedMinimumWidth()), i, i7), View.resolveSizeAndState(Math.max(i5, getSuggestedMinimumHeight()), i4, i7 << 16));
+    }
+}