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README.md

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+# Intrasys - Internal Transfers System
+
+![Rust](https://img.shields.io/badge/rust-%23000000.svg?style=logo=rust&logoColor=white)
+![PostgreSQL](https://img.shields.io/badge/PostgreSQL-316192?style=for-square&logo=postgresql&logoColor=white)
+![Axum](https://img.shields.io/badge/Tokio-1.46-green?style=for-square)
+![Axum](https://img.shields.io/badge/Sqlx-0.8-green?style=for-square)
+![Axum](https://img.shields.io/badge/Axum-0.8-green?style=for-square)
+
+Intrasys is an internal financial transfers application built with Rust and Axum, providing HTTP endpoints for account management and transaction processing with PostgreSQL as the backing database.
+
+## Features
+
+- Account creation with initial balance
+- Account balance queries
+- Secure transaction processing between accounts
+- Atomic transaction handling with database integrity
+- Precise decimal arithmetic for financial amounts
+
+## Prerequisites
+
+- Rust (latest stable version)
+- Docker (for database provisioning)
+- PostgreSQL client (optional)
+
+## Quick Start
+
+### 1. Provision PostgreSQL Database
+
+Run a PostgreSQL container with Docker:
+
+```bash
+docker run --name intrasys-pg -d -e POSTGRES_PASSWORD=password -p 127.0.0.1:5432:5432 postgres:alpine
+```
+
+### 2. Configure Environment
+
+Create a `.env` file in the project root:
+
+```bash
+echo "DATABASE_URL=postgres://postgres:password@localhost:5432/postgres" > .env
+```
+
+### 3. Run the Application
+
+```bash
+cargo run
+```
+
+The application will be available at `http://localhost:3000`
+
+## API Endpoints
+
+### Account Management
+
+- **Create Account**  
+  `POST /accounts`
+  ```json
+  {
+    "account_id": 123,
+    "initial_balance": "100.23344"
+  }
+  ```
+
+- **Get Account Balance**  
+  `GET /accounts/{account_id}`  
+  Response:
+  ```json
+  {
+    "account_id": 123,
+    "balance": "100.23344"
+  }
+  ```
+
+### Transactions
+
+- **Process Transaction**  
+  `POST /transactions`
+  ```json
+  {
+    "source_account_id": 123,
+    "destination_account_id": 456,
+    "amount": "50.12345"
+  }
+  ```
+
+## Development Setup
+
+1. Install Rust toolchain:
+   ```bash
+   curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
+   ```
+
+2. Clone the repository:
+   ```bash
+   git clone https://github.com/yourusername/intrasys.git
+   cd intrasys
+   ```
+
+3. Run database migrations (optional - the app will create tables if they don't exist):
+   ```bash
+   sqlx migrate run
+   ```
+
+## Testing
+
+Run the test suite with:
+
+```bash
+cargo test
+```
+
+## Assumptions
+
+- All accounts use the same currency
+- No authentication or authorization is implemented
+- Decimal precision of 10 decimal places is sufficient for financial amounts
+- Account IDs are positive integers
+
+## License
+
+MIT License
+
+## Contributing
+
+Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.