BinancePayConnectorSlim 1.0.1

<img alt="BPC" src="../assets/binance-pay-connector-icon.png" width="32"/> BinancePayConnector – Binance Pay Integration for .NET 💳🔐

BinancePayConnector is a .NET library that simplifies integration with the Binance Pay API for merchants, platforms, and service providers. It supports C2B flows like order creation, refunds, payouts, and webhook event handling — all in a strongly typed, modular, and extensible architecture.

✨ Features

• Typed SDK for Binance Pay REST endpoints (Order, Refund, Payout, SubMerchant, etc.)
• DI-friendly service registration via IServiceCollection
• Built-in webhook receiver with multiple callback strategies
• Slim version with generic MediatR-style Send<T> API

📦 Installation

Install via NuGet:

dotnet add package BinancePayConnector

🚀 Usage

You can use BinancePayConnector in one of the following ways:

1. Using new BinancePay(...) (Full-featured API access)

var binancePay = new BinancePay("your-api-key", "your-api-secret");

var response = await binancePay.Order.CreateOrder(
    new OrderIdentification(
        new Env(TerminalType.App),
        BinancePayId.Generate32().Value
    ),
    new OrderDetailsCrypto(
        "Description",
        0.001m,
        Assets.Usdt
    ),
    [
        new Goods(
            GoodsType.VirtualGoods,
            GoodsCategory.Others,
            ReferenceGoodsId: BinancePayId.Generate32().Value,
            GoodsName: "Name")
    ]
);

2. Using new BinancePaySlim(...) (Lightweight & dynamic MediatR-style API)

var binancePay = new BinancePaySlim("your-api-key", "your-api-secret");

var response = await binancePay.Send(
    request: new CreateOrderRequest(
        Env: new Env(
            TerminalType: TerminalType.App
        ),
        MerchantTradeNo: BinancePayId.Generate32().Value,
        OrderAmount: 0.001m,
        Currency: Assets.Usdt,
        Description: "Description",
        GoodsDetails:
        [
            new Goods(
                GoodsType: GoodsType.VirtualGoods,
                GoodsCategory: GoodsCategory.Others,
                ReferenceGoodsId: BinancePayId.Generate32().Value,
                GoodsName: "Name"
            )
        ],
        OrderExpireTime: DateTimeOffset.UtcNow.AddMinutes(5).ToUnixTimeMilliseconds(),
        WebhookUrl: "https://96b4-188-163-49-145.ngrok-free.app/api/binancepay/webhooks/order"
    )
);

3. Registering via DI with .AddBinancePay(apiKey, apiSecret)

builder.Services.AddBinancePay("your-api-key", "your-api-secret");

Then inject IBinancePay anywhere:

public class OrderController(IBinancePay binancePay) : ControllerBase
{
    public async Task<IActionResult> CreateOrder()
    {
        var result = await binancePay.Order.CreateOrder(...);
        return Ok(result.Body);
    }
}

4. Registering via IConfiguration + appsettings.json

🔸 Step 1: Configuration in appsettings.json

{
    "BinancePay": {
      "ApiKey": "your-api-key",
      "ApiSecret": "your-api-secret"
    }
}

🔸 Step 2: Register via DI

builder.Services.AddBinancePay(builder.Configuration);

📡 Webhook Handling

Configure webhook receiver (Only 1 and 2 usage):

var binancePay = new BinancePay(apiKey, apiSecret)
{
    WebhookConfig = new BinancePayWebhookConfig
    {
        BaseUri = "http://localhost:4421"
    }
};

Configure endpoint handling:

1 Anonymous endpoint, invokes with each webhook request

binancePay.OnUpdateInvoke(request =>
{
    if (request.BizType is BizType.Order) return;
    var orderNotification = DeserializeJson<OrderNotification>(request.Data);

    PrintOrderNotification(request, orderNotification);
});

2 Named endpoint, invokes for concrete webhook url

binancePay.OnUpdateInvoke(request =>
{
    if (request.BizType is not BizType.Order) return;
    var orderNotification = DeserializeJson<OrderNotification>(request.Data);

    PrintOrderNotification(request, orderNotification);
}, "api/binancepay/webhooks/order");

3 Named endpoint with response

binancePay.OnUpdateInvoke(request =>
{
    if (request.BizType is not BizType.Balance) return ResponseType.Failure;
    var balanceReportNotification = DeserializeJson<BalanceReportNotification>(request.Data);

    PrintBalanceNotification(request, balanceReportNotification);
    return ResponseType.Success;
}, "api/binancepay/webhooks/direct-debit");

4 Asp.Net endpoint for handling webhook request

[ApiController]
[Route("api/webhooks")]
public class WebhookController(IBinancePay binancePay) : ControllerBase
{
    [HttpPost("order")]
    public async Task<IActionResult> OrderWebHook(WebHookRequest webhook, CancellationToken ct)
    {
        if (webhook.BizType == BizType.Order)
        {
            var order = await binancePay.Order.GetOrderByPrepayId(webhook.BizIdStr, ct);
        }

        return Ok(new WebHookResponse(RequestStatus.Success));
    }
}

📦 Supported API Domains

• ✅ Order (create/query/refund/close)
• ✅ Direct Debit
• ✅ Payouts
• ✅ Sub-Merchants
• ✅ Wallet Balances
• ✅ Transfer Funds
• ✅ Share Info
• ✅ Reporting
• ✅ Webhook Callbacks

💖 Supporting This Project

If you find BinancePayConnector helpful, consider supporting its development:

• ⭐ Star the repository on GitHub
• 🐞 Report bugs and suggest features
• ☕ Donate in crypto (USDT TRC20): TEv4VqZYHajkbc4Jkg9EEr7gifcVuSQYmi

🤝 Contributing

PRs are welcome! Please open an issue first to discuss major changes.

📚 References

• Official Binance Pay API Docs
• Binance Developer Center

📌 TODO:

1. Split into separate projects for better separation of concerns:

• BinancePayConnector.Core – shared models, enums, value types, helpers
• BinancePayConnector – typed service-oriented API
• BinancePayConnector.Slim – lightweight Send<T>-based variant

2. Replace raw primitives in response types with rich value objects:

I think do it by base virtual methods like "MapTo" in Result models for mapping to typed model

• string PrepayId → BinancePayId PrepayId
• string QrCodeLink → Uri QrCodeLink
• etc.

3. Enhance request models with strongly typed wrappers:

• string Id → BinancePayId Id
• long UnixTimestamp → DateTime Time
• etc.

4. Write end to end tests for requests

5. Add xml documentation to all methods and classes

6. Do auto chossing server depense on ping response