[DONT MERGE] Cross platform POC

.expo/README.md

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+> Why do I have a folder named ".expo" in my project?
+
+The ".expo" folder is created when an Expo project is started using "expo start" command.
+
+> What do the files contain?
+
+- "devices.json": contains information about devices that have recently opened this project. This is used to populate the "Development sessions" list in your development builds.
+- "packager-info.json": contains port numbers and process PIDs that are used to serve the application to the mobile device/simulator.
+- "settings.json": contains the server configuration that is used to serve the application manifest.
+
+> Should I commit the ".expo" folder?
+
+No, you should not share the ".expo" folder. It does not contain any information that is relevant for other developers working on the project, it is specific to your machine.
+
+Upon project creation, the ".expo" folder is already added to your ".gitignore" file.

mobile/.gitignore

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+# Learn more https://docs.github.com/en/get-started/getting-started-with-git/ignoring-files
+
+# dependencies
+node_modules/
+
+# Expo
+.expo/
+dist/
+web-build/
+expo-env.d.ts
+
+# Native
+*.orig.*
+*.jks
+*.p8
+*.p12
+*.key
+*.mobileprovision
+
+# Metro
+.metro-health-check*
+
+# debug
+npm-debug.*
+yarn-debug.*
+yarn-error.*
+
+# macOS
+.DS_Store
+*.pem
+
+# local env files
+.env*.local
+
+# typescript
+*.tsbuildinfo
+
+app-example

mobile/README.md

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+# Welcome to your Expo app 👋
+
+This is an [Expo](https://expo.dev) project created with [`create-expo-app`](https://www.npmjs.com/package/create-expo-app).
+
+## Get started
+
+1. Install dependencies
+
+   ```bash
+   npm install
+   ```
+
+2. Start the app
+
+   ```bash
+    npx expo start
+   ```
+
+In the output, you'll find options to open the app in a
+
+- [development build](https://docs.expo.dev/develop/development-builds/introduction/)
+- [Android emulator](https://docs.expo.dev/workflow/android-studio-emulator/)
+- [iOS simulator](https://docs.expo.dev/workflow/ios-simulator/)
+- [Expo Go](https://expo.dev/go), a limited sandbox for trying out app development with Expo
+
+You can start developing by editing the files inside the **app** directory. This project uses [file-based routing](https://docs.expo.dev/router/introduction).
+
+## Get a fresh project
+
+When you're ready, run:
+
+```bash
+npm run reset-project
+```
+
+This command will move the starter code to the **app-example** directory and create a blank **app** directory where you can start developing.
+
+## Learn more
+
+To learn more about developing your project with Expo, look at the following resources:
+
+- [Expo documentation](https://docs.expo.dev/): Learn fundamentals, or go into advanced topics with our [guides](https://docs.expo.dev/guides).
+- [Learn Expo tutorial](https://docs.expo.dev/tutorial/introduction/): Follow a step-by-step tutorial where you'll create a project that runs on Android, iOS, and the web.
+
+## Join the community
+
+Join our community of developers creating universal apps.
+
+- [Expo on GitHub](https://github.com/expo/expo): View our open source platform and contribute.
+- [Discord community](https://chat.expo.dev): Chat with Expo users and ask questions.

mobile/app.json

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+{
+  "expo": {
+    "name": "mobile",
+    "slug": "mobile",
+    "version": "1.0.0",
+    "orientation": "portrait",
+    "icon": "./assets/images/icon.png",
+    "scheme": "myapp",
+    "userInterfaceStyle": "automatic",
+    "newArchEnabled": true,
+    "ios": {
+      "supportsTablet": true,
+      "bundleIdentifier": "org.stellar.mobile"
+    },
+    "android": {
+      "adaptiveIcon": {
+        "foregroundImage": "./assets/images/adaptive-icon.png",
+        "backgroundColor": "#ffffff"
+      }
+    },
+    "web": {
+      "bundler": "metro",
+      "output": "static",
+      "favicon": "./assets/images/favicon.png"
+    },
+    "plugins": [
+      "expo-router",
+      [
+        "expo-splash-screen",
+        {
+          "image": "./assets/images/splash-icon.png",
+          "imageWidth": 200,
+          "resizeMode": "contain",
+          "backgroundColor": "#ffffff"
+        }
+      ],
+      "expo-secure-store",
+      "expo-font"
+    ],
+    "experiments": {
+      "typedRoutes": true
+    }
+  }
+}

mobile/app/(tabs)/_layout.tsx

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+import { Tabs } from "expo-router";
+import React from "react";
+import { Platform } from "react-native";
+
+import { HapticTab } from "@/components/HapticTab";
+import { IconSymbol } from "@/components/ui/IconSymbol";
+import TabBarBackground from "@/components/ui/TabBarBackground";
+import { Colors } from "@/constants/Colors";
+import { useColorScheme } from "@/hooks/useColorScheme";
+
+export default function TabLayout() {
+  const colorScheme = useColorScheme();
+
+  return (
+    <Tabs
+      screenOptions={{
+        tabBarActiveTintColor: Colors[colorScheme ?? "light"].tint,
+        headerShown: false,
+        tabBarButton: HapticTab,
+        tabBarBackground: TabBarBackground,
+        tabBarStyle: Platform.select({
+          ios: {
+            // Use a transparent background on iOS to show the blur effect
+            position: "absolute",
+          },
+          default: {},
+        }),
+      }}
+    >
+      <Tabs.Screen
+        name="index"
+        options={{
+          title: "Home",
+          tabBarIcon: ({ color }) => (
+            <IconSymbol size={28} name="house.fill" color={color} />
+          ),
+        }}
+      />
+      <Tabs.Screen
+        name="explore"
+        options={{
+          title: "Explore",
+          tabBarIcon: ({ color }) => (
+            <IconSymbol size={28} name="paperplane.fill" color={color} />
+          ),
+        }}
+      />
+    </Tabs>
+  );
+}

mobile/app/(tabs)/explore.tsx

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+import { StyleSheet, Image, Platform } from "react-native";
+
+import { Collapsible } from "@/components/Collapsible";
+import { ExternalLink } from "@/components/ExternalLink";
+import ParallaxScrollView from "@/components/ParallaxScrollView";
+import { ThemedText } from "@/components/ThemedText";
+import { ThemedView } from "@/components/ThemedView";
+import { IconSymbol } from "@/components/ui/IconSymbol";
+
+export default function TabTwoScreen() {
+  return (
+    <ParallaxScrollView
+      headerBackgroundColor={{ light: "#D0D0D0", dark: "#353636" }}
+      headerImage={
+        <IconSymbol
+          size={310}
+          color="#808080"
+          name="chevron.left.forwardslash.chevron.right"
+          style={styles.headerImage}
+        />
+      }
+    >
+      <ThemedView style={styles.titleContainer}>
+        <ThemedText type="title">Explore</ThemedText>
+      </ThemedView>
+      <ThemedText>
+        This app includes example code to help you get started.
+      </ThemedText>
+      <Collapsible title="File-based routing">
+        <ThemedText>
+          This app has two screens:{" "}
+          <ThemedText type="defaultSemiBold">app/(tabs)/index.tsx</ThemedText>{" "}
+          and{" "}
+          <ThemedText type="defaultSemiBold">app/(tabs)/explore.tsx</ThemedText>
+        </ThemedText>
+        <ThemedText>
+          The layout file in{" "}
+          <ThemedText type="defaultSemiBold">app/(tabs)/_layout.tsx</ThemedText>{" "}
+          sets up the tab navigator.
+        </ThemedText>
+        <ExternalLink href="https://docs.expo.dev/router/introduction">
+          <ThemedText type="link">Learn more</ThemedText>
+        </ExternalLink>
+      </Collapsible>
+      <Collapsible title="Android, iOS, and web support">
+        <ThemedText>
+          You can open this project on Android, iOS, and the web. To open the
+          web version, press <ThemedText type="defaultSemiBold">w</ThemedText>{" "}
+          in the terminal running this project.
+        </ThemedText>
+      </Collapsible>
+      <Collapsible title="Images">
+        <ThemedText>
+          For static images, you can use the{" "}
+          <ThemedText type="defaultSemiBold">@2x</ThemedText> and{" "}
+          <ThemedText type="defaultSemiBold">@3x</ThemedText> suffixes to
+          provide files for different screen densities
+        </ThemedText>
+        <Image
+          source={require("@/assets/images/react-logo.png")}
+          style={{ alignSelf: "center" }}
+        />
+        <ExternalLink href="https://reactnative.dev/docs/images">
+          <ThemedText type="link">Learn more</ThemedText>
+        </ExternalLink>
+      </Collapsible>
+      <Collapsible title="Custom fonts">
+        <ThemedText>
+          Open <ThemedText type="defaultSemiBold">app/_layout.tsx</ThemedText>{" "}
+          to see how to load{" "}
+          <ThemedText style={{ fontFamily: "SpaceMono" }}>
+            custom fonts such as this one.
+          </ThemedText>
+        </ThemedText>
+        <ExternalLink href="https://docs.expo.dev/versions/latest/sdk/font">
+          <ThemedText type="link">Learn more</ThemedText>
+        </ExternalLink>
+      </Collapsible>
+      <Collapsible title="Light and dark mode components">
+        <ThemedText>
+          This template has light and dark mode support. The{" "}
+          <ThemedText type="defaultSemiBold">useColorScheme()</ThemedText> hook
+          lets you inspect what the user's current color scheme is, and so you
+          can adjust UI colors accordingly.
+        </ThemedText>
+        <ExternalLink href="https://docs.expo.dev/develop/user-interface/color-themes/">
+          <ThemedText type="link">Learn more</ThemedText>
+        </ExternalLink>
+      </Collapsible>
+      <Collapsible title="Animations">
+        <ThemedText>
+          This template includes an example of an animated component. The{" "}
+          <ThemedText type="defaultSemiBold">
+            components/HelloWave.tsx
+          </ThemedText>{" "}
+          component uses the powerful{" "}
+          <ThemedText type="defaultSemiBold">
+            react-native-reanimated
+          </ThemedText>{" "}
+          library to create a waving hand animation.
+        </ThemedText>
+        {Platform.select({
+          ios: (
+            <ThemedText>
+              The{" "}
+              <ThemedText type="defaultSemiBold">
+                components/ParallaxScrollView.tsx
+              </ThemedText>{" "}
+              component provides a parallax effect for the header image.
+            </ThemedText>
+          ),
+        })}
+      </Collapsible>
+    </ParallaxScrollView>
+  );
+}
+
+const styles = StyleSheet.create({
+  headerImage: {
+    color: "#808080",
+    bottom: -90,
+    left: -35,
+    position: "absolute",
+  },
+  titleContainer: {
+    flexDirection: "row",
+    gap: 8,
+  },
+});