Parbad

builder.Services.AddParbad()
       .ConfigureGateways(gateways => gateways.AddMellat().WithAccounts(...))
       .ConfigureHttpContext(httpContext => httpContext.UseDefaultAspNetCore())
       .ConfigureStorage(storage => storage.UseEfCore<ShopDbContext>());

var result = await onlinePayment.RequestAsync(invoice => invoice
    .SetAmount(250_000)
    .SetCallbackUrl(callbackUrl)
    .UseAutoIncrementTrackingNumber()
    .UseMellat());