MemeSOL

A crypto wallet app that lets anyone launch a meme coin within seconds.

Landing Page: https://memesol.sunwookim.dev

Mirror: https://memesol.daniel-liu.dev

Features

• Simple interface.
• Launch a meme coin within seconds.
• AI generate an image for your meme coin.
• Find and add other meme coins created by other MemeSOL users.
• Send/receive meme coins with a QR code.
• View live portfolio balance and transaction history.

Tech Stack

• Swift : iOS app

• Next.js : Web

• ASP.NET : Backend

• PostgreSQL : Database

• Docker : Containerization

• Linux : Deployment Server

System Architecture

flowchart LR
    iOS["Swift iOS App"] -- "HTTP/REST" --> Backend["ASP.NET Backend"]
    Backend --> DB[("PostgreSQL Database")]

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iOS App Architecture

This iOS Swift source follows the MVVM (Model–View–ViewModel) pattern for the iOS app.

flowchart LR
    View["View\n(SwiftUI)"] --> ViewModel["ViewModel\n(@Observable)"]
    ViewModel --> Services["Services\n(API, Session)"]
    Services -.-> Models["Models\n(Codable)"]

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ASP.NET Backend Architecture

The ASP.NET backend is structured in a layered architecture with the following components:

flowchart LR
    Controllers["Controllers\n(API Endpoints)"] --> Services["Services\n(Business Logic)"]
    Services --> Data["Data\n(Entity Framework)"]
    Data --> DB[("PostgreSQL Database")]
    
    Models["Models\n(Entities & DTOs)"]
    
    Controllers -.-> Models
    Services -.-> Models
    Data -.-> Models

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Running Locally

Requirements

• macOS with Xcode 16 or later iOS 17+ deployment target Swift 5.9+
• ASP.NET 10+

Backend

cd MemeSOL/apps/backend
./setup-env.sh # Enter a valid wallet mnemonic
./start-db.sh
dotnet ef database update
dotnet run

iOS App

Replace baseURL in MemeSOL/apps/ios/src/App/Services/API/APIClient.swift with your backend URL (e.g., http://localhost:5000)
Open MemeSOL/apps/ios/src/App.xcodeproj in Xcode and run on a simulator or device.

Future Improvements

These features could not be implemented within the timeframe of the assignment due to the need of a valid Apple Developer account.

• Authentication with Apple Sign-In
• Buying tokens using Apple Pay
• Push notifications for transactions and price alerts
• Pricing data based on supply and demand (currently simulating by changing the price by +-5% every midnight)