Payments System

Proof of Concept (PoC)

Implementation: BARK Payments System Components

Components for both the backend and frontend systems of the BARK Payments System, including descriptions and implementation details.

1. Backend Components

1.1 Authentication

Component: auth.ts Purpose: Handles user authentication and authorization.

Key Functions:

  • generateToken(userId: string): string - Generates a JWT token for the user.

  • verifyToken(token: string): any - Verifies the JWT token.

  • hashPassword(password: string): Promise<string> - Hashes the user password.

  • comparePassword(password: string, hash: string): Promise<boolean> - Compares the plaintext password with the hashed password.

Dependencies: jsonwebtoken, bcryptjs, dotenv

1.2 User Management

Component: user.ts Purpose: Defines the User schema and model for MongoDB.

Key Features:

  • User registration and profile management.

  • Schema includes fields for username, password, and email.

Dependencies: mongoose

1.3 Payment Handling

Component: payment.ts Purpose: Manages payment processing for CNFTs and other transactions.

Key Functions:

  • createPayment(recipient: PublicKey, amount: number, token: string): Promise<{ paymentURL: string; qrCode: string }> - Creates a payment URL and QR code.

Dependencies: @solana/web3.js, QRCode, dotenv

1.4 Escrow Management

Component: escrow.ts Purpose: Manages escrow accounts and transactions.

Key Functions:

  • createEscrow(payer: PublicKey, amount: number, releaseTime: number): Promise<PublicKey> - Creates an escrow account.

  • releaseEscrowFunds(escrowAccount: PublicKey, recipient: PublicKey): Promise<string> - Releases funds from the escrow account.

  • resolveDispute(escrowAccount: PublicKey, disputeData: any): Promise<void> - Resolves disputes.

Dependencies: @solana/web3.js

1.5 Utility Functions

Component: utils.ts Purpose: Provides utility functions for QR code and payment URL generation.

Key Functions:

  • createQR(url: string): Promise<string> - Generates a QR code for a given URL.

  • createPaymentURL(recipient: PublicKey, amount: number, token: string, network: string): Promise<string> - Constructs a payment URL.

Dependencies: QRCode, @solana/web3.js

2. Frontend Components

2.1 Authentication Hooks

Component: useAuth.ts Purpose: Custom React hook for user authentication and profile management.

Key Functions:

  • login(username: string, password: string) - Logs in the user and stores the JWT token.

  • fetchProfile() - Retrieves user profile data.

  • logout() - Logs out the user and clears local storage.

Dependencies: axios, react

2.2 Login Component

Component: Login.tsx Purpose: Provides a user interface for login.

Key Features:

  • Input fields for username and password.

  • Form submission handling to call login() function from useAuth.

Dependencies: react, useAuth

2.3 Payment Component

Component: Payment.tsx Purpose: Displays payment options and processes transactions.

Key Features:

  • Options for BARK, SOL, and USDC payments.

  • QR code and payment URL display.

  • Integration with the backend createPayment function.

Dependencies: react, axios

2.4 Profile Component

Component: Profile.tsx Purpose: Displays user profile information.

Key Features:

  • Shows user details fetched from the backend.

  • Integration with fetchProfile from useAuth.

Dependencies: react, useAuth

3. Integration with Vercel

Purpose: Deploy and manage the application on Vercel.

Key Steps:

  1. Install Vercel CLI:

    npm install -g vercel

  2. Deploy Backend:

    Navigate to your backend directory and run:

    vercel

  3. Deploy Frontend:

    Navigate to your frontend directory and run:

    vercel

  4. Set Environment Variables:

    Configure environment variables through the Vercel dashboard or using the Vercel CLI.

  5. Monitor and Scale:

    Use Vercel's monitoring tools to keep track of your deployment's performance and scale as necessary.

4. Testing

Purpose: Ensure that the application functions correctly under various conditions.

Key Approaches:

  • Unit Tests: For individual functions and components.

  • Integration Tests: To verify interactions between components and services.

  • End-to-End Tests: To simulate real user interactions.

Tools:

  • Jest: For unit and integration testing.

  • React Testing Library: For testing React components.

  • Cypress: For end-to-end testing.

5. Monitoring

Purpose: Track the health and performance of the application.

Tools:

  • Vercel Monitoring: Built-in monitoring for serverless deployments.

  • Sentry: For error tracking and performance monitoring.

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