Crypto Payment Gateway

A simple payment gateway for the most common cryptocurrencies (BTC, ETH, LTC) using NestJS and Prisma.

Installation

$ pnpm install
$ pnpm run setup

The API_KEY needs to be generated using pnpm run setup. Because is hashed with sha512, so, if you lost it, you will need generate a new one.

Running the app

# development
$ pnpm run start

# watch mode
$ pnpm run start:dev

# production mode
$ pnpm run start:prod

Test

# unit tests
$ pnpm run test

# e2e tests
$ pnpm run test:e2e

# test coverage
$ pnpm run test:cov

Usage

The server is available at http://localhost:3000 (Or in the port that you set in the .env file).

Enums:

Currency

• BTC: Bitcoin
• ETH: Ethereum
• LTC: Litecoin

OrderStatus

• PENDING: The payment is pending.
• PROCESSING: The money was received but waiting for confirmations.
• PARTIAL_RECEIVED: The money was received but it's not the full amount. The user can still pay the remaining amount.
• COMPLETED: The payment was successful.
• EXPIRED: The payment is expired.
• FAILED: The payment is failed.

Endpoints:

All endpoints require X-API-KEY header. You can generate it using pnpm run setup

• GET /api/orders

Get a list of all the orders.

Parameters:

• page: The page number to retrieve. Defaults to 1.
• limit: The number of orders to retrieve per page. Defaults to 10.
• status: Optional. The status to filter by.
• currency: Optional. The currency to filter by.
• walletAddress: Optional. The wallet address to filter by.

Example response:

[
  {
    "order": {
      "id": "random-uuid",
      "status": "PENDING", 
      "currency": "BTC", 
      "amount": 1000,
      "confirmations": 2,
      "description": "Buy some coffee",
      "address": "wallet address to send the payment to",
      "expiresAt": 1234567890,
      "externalId": "order-12345"
    },
    "payment": {
      "confirmations": 1,
      "received": 0,
      "transactions": [
        {
          "txid": "txid",
          "confirmations": 1,
          "amount": 1000,
          "from": "wallet address",
        }
      ]
    }
  }
]

• POST /api/orders

Create a new order.

Example body:

{
  "currency": "BTC",
  "amount": 1000,
  "confirmations": 2,
  "description": "Buy some coffee",
  "expiresAt": 1234567890,
  "externalId": "order-12345"
}

Example response:

{
  "id": "random-uuid",
  "status": "PENDING",
  "currency": "BTC",
  "amount": 1000,
  "confirmations": 2,
  "description": "Buy some coffee",
  "address": "wallet address to send the payment to",
  "expiresAt": 1234567890,
  "externalId": "order-12345"
}

• GET /api/orders/:id

Get an order by its ID.

Example response:

{
  "id": "random-uuid",
  "status": "PENDING",
  "currency": "BTC",
  "amount": 1000,
  "confirmations": 2,
  "description": "Buy some coffee",
  "address": "wallet address to send the payment to",
  "expiresAt": 1234567890,
  "externalId": "order-12345",
  "payment": {
    "confirmations": 1,
    "received": 0,
    "transactions": [
      {
        "txid": "txid",
        "confirmations": 1,
        "amount": 1000,
        "from": "wallet address",
      }
    ]
  }
}

• PATCH /api/orders/:id/status/:status

Update the status of an order.

Parameters:

• id: The ID of the order to update.
• status: The new status of the order.

If the order is already in the new status, the request will be ignored.

• DELETE /api/orders/:id

Cancel an order by its ID.

Parameters:

• id: The ID of the order to cancel.

The order will be marked as CANCELED and the payment will be cancelled.

License

This project is open-sourced software licensed under the MIT license.

Contributing

Contributions are what make the open source community such an amazing place to learn, inspire, and create. Any contributions you make are greatly appreciated.