public class Client

{

    private readonly HttpClient _httpClient;

    private readonly ClientConfig _clientConfig;

    private readonly Serilog.ILogger _logger;

​

    public Client(HttpClient httpClient, ClientConfig clientConfig, Serilog.ILogger logger)

    {

        _httpClient = httpClient;

        _clientConfig = clientConfig;

        _logger = logger;

    }

​

    public async ValueTask<T> SendRequest<T>(DTO.Processors.PayPal.MerchantAccountConfig merchantConfig, string url, PayPalRequest obj)

        where T : PayPalResponse, new()

    {

        try

        {

            var auth = Convert.ToBase64String(Encoding.UTF8.GetBytes(merchantConfig.clientId + ":" + merchantConfig.clientSecret));

            var json = Newtonsoft.Json.JsonConvert.SerializeObject(obj, Global._jsonSettings);

            using var rq = new HttpRequestMessage()

            {

                Method = HttpMethod.Post,

                RequestUri = new(_clientConfig.BaseUrl + url),

                Content = new StringContent(json, Encoding.UTF8, "application/json"),

            };

            rq.Headers.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Basic", auth);

            rq.Headers.Add("PayPal-Request-Id", obj.payPalRequestId??Guid.NewGuid().ToString("N"));

            using HttpResponseMessage response = await _httpClient.SendAsync(rq);

            using var contentStream = await response.Content.ReadAsStreamAsync();

            var rp = await System.Text.Json.JsonSerializer.DeserializeAsync<T>(contentStream);

            if (!response.IsSuccessStatusCode)

                rp.error = true;

​

            return rp;

        }

        catch (Exception ex)

        {

            _logger.Error(ex, "Can not communicate to PayPal");

​

            return new T()

            {

                error = true,

                message = "Can not communicate to PayPal",

            };

        }

    }

​

}

​

public class PayPalRequest

{

    public string payPalRequestId; //no getters/setter since we do not want it in JSON

}

​

public class PayPalResponse

{

    public bool error { get; set; }

    public string message { get; set; }

}

​

​

​

public class CreateOrderRequest : PayPalRequest

{

    public Purchase_Units[] purchase_units { get; set; }

    public string intent { get; set; } //CAPTURE or AUTHORIZE 

    public Payer payer { get; set; }

    public Payment_Source payment_source { get; set; }

    public Application_Context application_context { get; set; }

}

​

​

​

public class CreateOrderResponse : PayPalResponse

{

    public string id { get; set; }

    public string status { get; set; } //CREATED,SAVED, APPROVED, VOIDED, COMPLETED, PAYER_ACTION_REQUIRED

    public string intent { get; set; }

    public Payment_Source payment_source { get; set; }

    public Purchase_Units[] purchase_units { get; set; }

    public DateTime create_time { get; set; }

    public DateTime update_time { get; set; }

    public Link[] links { get; set; }

}

​