repo

A TypeScript monorepo with tRPC, Drizzle, and InversifyJS

Tech Stack

• Monorepo: Turborepo + Bun workspaces
• API: tRPC with automatic transaction management
• Database: Drizzle ORM with PostgreSQL
• Auth: Better Auth with Drizzle adapter
• DI: InversifyJS with request-scoped transactions via AsyncLocalStorage
• Frontend: Vite + React + TanStack Router

Project Structure

├── apps/
│   ├── server/          # Bun tRPC server
│   └── web/             # Vite React frontend
├── packages/
│   ├── auth/            # Better Auth configuration
│   ├── bootstrap/       # DI container initialization
│   ├── db/              # Drizzle ORM schemas & migrations
│   ├── di/              # Dependency injection (InversifyJS)
│   ├── env/             # Type-safe environment variables
│   ├── repository/      # Data access layer
│   ├── routes/          # tRPC routers & procedures
│   ├── service/         # Business logic services
│   ├── use-case/        # Application use cases
│   └── types/           # Shared TypeScript types
└── package.json

Getting Started

Prerequisites

• Bun >= 1.3.5
• PostgreSQL database

Installation

1. Install dependencies:

   bun install

2. Copy environment file and configure:

   cp .env.example .env
   # Edit .env with your database credentials

3. Generate and run database migrations:

   bun run db:generate
   bun run db:migrate

4. Start development servers:

   bun run dev

Available Scripts

• bun run dev - Start all development servers
• bun run build - Build all packages
• bun run db:generate - Generate Drizzle migrations
• bun run db:migrate - Run database migrations
• bun run db:studio - Open Drizzle Studio

Architecture

Transaction Flow

1. Request arrives → tRPC handler
2. Transaction middleware starts DB transaction
3. Child DI container created with transaction bound
4. Repositories resolved from child container get the transaction
5. On success → transaction commits
6. On error → transaction rolls back

This ensures all database operations within a single request share the same transaction.