using RestSharp;


var options = new RestClientOptions("https://api.sandbox.{id}.gr4vy.app/transactions/{transaction_id}/events");
var client = new RestClient(options);
var request = new RestRequest("");
request.AddHeader("Authorization", "Bearer <token>");
var response = await client.GetAsync(request);

Console.WriteLine("{0}", response.Content);

{
  "items": [
    {
      "type": "transaction-event",
      "id": "fe26475d-ec3e-4884-9553-f7356683f7f9",
      "name": "bin-lookup-request",
      "created_at": "2013-07-16T19:23:00.000+00:00",
      "context": {
        "response": "{}",
        "response_status_code": 200,
        "success": true,
        "bin": "<string>",
        "instrument": "pan",
        "type": "<string>",
        "scheme": "visa",
        "additional_schemes": [
          "visa"
        ],
        "country_code": "<string>",
        "supports_network_tokens": true
      }
    }
  ],
  "limit": 1,
  "next_cursor": "ZXhhbXBsZTE",
  "previous_cursor": null
}