feat: Add loading and custom loader support to GooglePayButton

android/src/main/java/com/makepayment/GooglePayButtonComponentManager.kt

@@ -31,7 +31,7 @@ class GooglePayButtonComponentManager(context: ReactApplicationContext) : Simple
     view?.allowedPaymentMethods = value!!
   }
 
-  @ReactProp(name = "type")
+  @ReactProp(name = "buttonType")
   override fun setType(view: GooglePayButtonComponent, type: Int) {
     view.type = type
   }

src/GooglePayButton.tsx

@@ -1,8 +1,13 @@
-import { StyleSheet, Pressable } from 'react-native';
+import { StyleSheet, Pressable, View } from 'react-native';
 import type { ViewProps, StyleProp, ViewStyle } from 'react-native';
+import type { ReactNode } from 'react';
 import GooglePayButtonComponent from './specs/NativeGooglePayButtonComponent';
 import GooglePayButtonConstantsModule from './specs/NativeGooglePayButtonConstantsModule';
-import type { GooglePayPaymentMethod } from './specs/NativeGooglePayButtonComponent'
+import type { GooglePayPaymentMethod } from './specs/NativeGooglePayButtonComponent';
+import { Loader } from './Loader';
+
+const GooglePayButtonConstants =
+  GooglePayButtonConstantsModule?.loadConstants();
 
 export interface Props extends ViewProps {
   allowedPaymentMethods: GooglePayPaymentMethod[];
@@ -12,6 +17,8 @@ export interface Props extends ViewProps {
   onPress: () => void;
   disabled: boolean;
   style: StyleProp<ViewStyle>;
+  loading?: boolean;
+  loader?: ReactNode;
 }
 
 const GooglePayButton = ({
@@ -22,13 +29,15 @@ const GooglePayButton = ({
   type,
   radius,
   style,
+  loading,
+  loader,
 }: Props) => {
   return (
     <Pressable
       onPress={onPress}
-      disabled={disabled}
+      disabled={disabled || loading}
       style={[
-        disabled ? styles.disabled : styles.enabled,
+        disabled || loading ? styles.disabled : styles.enabled,
         styles.overridable,
         style,
         styles.fixed,
@@ -40,8 +49,13 @@ const GooglePayButton = ({
         type={type}
         theme={theme}
         radius={radius}
-        style={[styles.button, styles.nobg]}
+        style={[styles.button, styles.nobg, loading && styles.hidden]}
       />
+      {loading && (
+        <View style={styles.loaderContainer}>
+          {loader || <Loader theme={theme} />}
+        </View>
+      )}
     </Pressable>
   );
 };
@@ -67,8 +81,14 @@ const styles = StyleSheet.create({
   nobg: {
     backgroundColor: 'rgba(0, 0, 0, 0)',
   },
+  hidden: {
+    opacity: 0,
+  },
+  loaderContainer: {
+    ...StyleSheet.absoluteFillObject,
+    justifyContent: 'center',
+    alignItems: 'center',
+  },
 });
 
-const GooglePayButtonConstants = GooglePayButtonConstantsModule?.loadConstants();
-
 export { GooglePayButton, GooglePayButtonConstants };

src/Loader.tsx

@@ -0,0 +1,62 @@
+import { useEffect, useRef } from 'react';
+import { StyleSheet, Animated, Easing } from 'react-native';
+import type { ViewStyle, StyleProp } from 'react-native';
+
+export interface LoaderProps {
+  theme?: number;
+  color?: string;
+  style?: StyleProp<ViewStyle>;
+}
+
+/**
+ * A custom Google Pay style loading spinner.
+ * Features a smooth rotating arc.
+ */
+export const Loader = ({ theme, color, style }: LoaderProps) => {
+  const spinValue = useRef(new Animated.Value(0)).current;
+
+  useEffect(() => {
+    const animation = Animated.loop(
+      Animated.timing(spinValue, {
+        toValue: 1,
+        duration: 800,
+        easing: Easing.linear,
+        useNativeDriver: true,
+      })
+    );
+    animation.start();
+    return () => animation.stop();
+  }, [spinValue]);
+
+  const spin = spinValue.interpolate({
+    inputRange: [0, 1],
+    outputRange: ['0deg', '360deg'],
+  });
+
+  // Default color logic based on theme if no explicit color provided
+  // theme === 1 is usually Dark (GooglePayButtonConstants.Themes.Dark)
+  const finalColor = color || (theme === 1 ? 'white' : 'black');
+
+  return (
+    <Animated.View
+      style={[
+        styles.loader,
+        {
+          borderColor: finalColor,
+          transform: [{ rotate: spin }],
+        },
+        style,
+      ]}
+    />
+  );
+};
+
+const styles = StyleSheet.create({
+  loader: {
+    width: 24,
+    height: 24,
+    borderRadius: 12,
+    borderWidth: 2,
+    borderTopColor: 'transparent',
+  },
+});

src/index.tsx

@@ -1,4 +1,5 @@
 export * from './PaymentRequest';
 export { GooglePayButton, GooglePayButtonConstants } from './GooglePayButton';
+export { Loader } from './Loader';
 export type * from './specs/NativeMakePaymentModule';
 export * from './constants';