ShapeShift Backend Monorepo

This is a Turborepo monorepo containing the ShapeShift backend microservices.

Architecture

shapeshift-backend/
├── apps/
│   ├── user-service/          # User accounts microservice
│   ├── swap-service/          # Swap microservice
│   └── notifications-service/ # Notifications microservice
├── packages/
│   ├── shared-types/          # Shared TypeScript types
│   └── shared-utils/          # Shared utilities
├── turbo.json                 # Turborepo configuration
├── package.json               # Root package.json
└── docker-compose.yml         # Docker Compose for development

Services

User Service (apps/user-service)

• Port: 3002
• Purpose: Manages user accounts, devices, and authentication
• Database: SQLite (development) / PostgreSQL (production)
• API: /users/*

Swap Service (apps/swap-service)

• Port: 3001
• Purpose: Handles swaps and WebSocket connections
• Database: SQLite (development) / PostgreSQL (production)
• API: /swaps/*
• WebSocket: Real-time updates
• Dependencies: User Service, Notifications Service

Notifications Service (apps/notifications-service)

• Port: 3003
• Purpose: Manages notifications and push notifications
• Database: SQLite (development) / PostgreSQL (production)
• API: /notifications/*
• WebSocket: Real-time notifications
• Dependencies: User Service

Service Communication

┌─────────────────┐    HTTP    ┌─────────────────┐
│   User Service  │◄──────────►│  Swap Service   │
│   (Port 3002)   │            │  (Port 3001)    │
└─────────────────┘            └─────────────────┘
         ▲                              ▲
         │ HTTP                         │ HTTP
         ▼                              ▼
┌─────────────────┐            ┌─────────────────┐
│ Notifications   │            │ Notifications   │
│ Service         │            │ Service         │
│ (Port 3003)     │            │ (Port 3003)     │
└─────────────────┘            └─────────────────┘

Getting Started

Prerequisites

• Node.js 22+
• Yarn 4+
• Docker (optional, for containerized development)

Installation

1. Copy the environment variables Copy .env.example into .env at the root of the repository Ask the team for the EXPO token used to launch notifications

2. Install dependencies:

   yarn install

3. Build shared packages:

   yarn build

4. Set up databases:

   # Generate Prisma clients
   yarn db:generate
   
   # Push db structure
   yarn db:push
   
   # Run migrations
   yarn db:migrate

Development

Option 1: Local Development

# Start all services in development mode
yarn start:dev

# Or start individual services
yarn workspace @shapeshift/user-service start:dev
yarn workspace @shapeshift/swap-service start:dev
yarn workspace @shapeshift/notifications-service start:dev

Option 2: Docker Development

# Start all services with Docker
docker-compose up -d

# View logs
docker-compose logs -f

Available Scripts

Root Level

• yarn build - Build all packages and apps
• yarn dev - Start all services in development mode
• yarn test - Run tests for all packages
• yarn lint - Lint all packages
• yarn db:generate - Generate Prisma clients
• yarn db:push - Push default database structure
• yarn db:migrate - Run database migrations
• yarn clean - Clean all builds and node_modules

Individual Services

• yarn workspace @shapeshift/user-service dev - Start user service
• yarn workspace @shapeshift/swap-service dev - Start swap service
• yarn workspace @shapeshift/notifications-service dev - Start notifications service
• yarn workspace @shapeshift/shared-types build - Build shared types
• yarn workspace @shapeshift/shared-utils build - Build shared utils

API Documentation

User Service Endpoints

POST   /users                    # Create user
GET    /users                    # Get all users
GET    /users/:userId            # Get user by ID
POST   /users/get-or-create      # Get or create user
GET    /users/account/:accountId # Get user by account ID
POST   /users/:userId/account-id # Add account ID
POST   /users/:userId/devices    # Register device
GET    /users/:userId/devices    # Get user devices

Swap Service Endpoints

POST   /swaps                    # Create swap
GET    /swaps                    # Get all swaps
GET    /swaps/:swapId            # Get swap by ID
GET    /swaps/user/:userId       # Get swaps by user
PUT    /swaps/:swapId            # Update swap

Notifications Service Endpoints

POST   /notifications            # Create notification
POST   /notifications/register-device # Register device
GET    /notifications/user/:userId    # Get user notifications
PUT    /notifications/:id/read   # Mark notification as read
GET    /notifications/devices/:userId # Get user devices
POST   /notifications/send-to-user    # Send notification to user
POST   /notifications/send-to-device  # Send notification to device

Environment Variables

Swap Service

PORT=3001
DATABASE_URL=file:./dev.db
USER_SERVICE_URL=http:/localhost:3001
NOTIFICATIONS_SERVICE_URL=http:/localhost:3003

User Service

PORT=3002
DATABASE_URL=file:./user-service.db
ACCOUNT_ID_SALT=your-salt-here

Notifications Service

PORT=3003
DATABASE_URL=file:./notifications-service.db
USER_SERVICE_URL=http:/localhost:3001
EXPO_ACCESS_TOKEN=your-expo-token

Database Setup

Production (PostgreSQL)

Update the DATABASE_URL in each service's environment to point to your PostgreSQL instance.

Service Communication

HTTP Communication

Services communicate via HTTP APIs using the service clients in @shapeshift/shared-utils:

import { UserServiceClient, NotificationsServiceClient } from '@shapeshift/shared-utils';

const userClient = new UserServiceClient();
const notificationsClient = new NotificationsServiceClient();

/ Get user from user service
const user = await userClient.getUserById(userId);

/ Send notification
await notificationsClient.createNotification({
  userId,
  title: 'Swap Completed',
  body: 'Your swap has been completed successfully',
  type: 'SWAP_COMPLETED',
  swapId: swapId
});

WebSocket Communication

• Swap Service: Handles swap-related WebSocket connections
• Notifications Service: Handles notification-related WebSocket connections

Deployment

Docker Deployment

# Build production images
docker-compose -f docker-compose.prod.yml build

# Deploy
docker-compose -f docker-compose.prod.yml up -d

Individual Service Deployment

Each service can be deployed independently as they are separate NestJS applications.

Contributing

1. Create a feature branch
2. Make your changes
3. Run tests: yarn test
4. Run linting: yarn lint
5. Submit a pull request

Troubleshooting

Common Issues

1. Port conflicts: Make sure ports 3001, 3002, and 3003 are available
2. Database issues: Run yarn db:generate and yarn db:migrate
3. Build issues: Clean and rebuild: yarn clean && yarn build
4. Service communication: Check environment variables for service URLs

Logs

# View service logs
yarn workspace @shapeshift/user-service logs
yarn workspace @shapeshift/swap-service logs
yarn workspace @shapeshift/notifications-service logs

# Docker logs
docker-compose logs -f user-service
docker-compose logs -f swap-service
docker-compose logs -f notifications-service