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@jakejscott
Last active January 20, 2024 13:09
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Paypal .net core C# sample
public class PayPalPaymentCreatedResponse
{
public string id { get; set; }
public string intent { get; set; }
public string state { get; set; }
public Payer payer { get; set; }
public Transaction[] transactions { get; set; }
public DateTime create_time { get; set; }
public Link[] links { get; set; }
public class Payer
{
public string payment_method { get; set; }
}
public class Transaction
{
public Amount amount { get; set; }
public object[] related_resources { get; set; }
}
public class Amount
{
public string total { get; set; }
public string currency { get; set; }
}
public class Link
{
public string href { get; set; }
public string rel { get; set; }
public string method { get; set; }
}
}
public class PayPalPaymentExecutedResponse
{
public string id { get; set; }
public string intent { get; set; }
public string state { get; set; }
public string cart { get; set; }
public Payer payer { get; set; }
public Transaction[] transactions { get; set; }
public DateTime create_time { get; set; }
public Link[] links { get; set; }
public class Payer
{
public string payment_method { get; set; }
public string status { get; set; }
public Payer_Info payer_info { get; set; }
}
public class Payer_Info
{
public string email { get; set; }
public string first_name { get; set; }
public string last_name { get; set; }
public string payer_id { get; set; }
public Shipping_Address shipping_address { get; set; }
public string country_code { get; set; }
public Billing_Address billing_address { get; set; }
}
public class Shipping_Address
{
public string recipient_name { get; set; }
public string line1 { get; set; }
public string city { get; set; }
public string state { get; set; }
public string postal_code { get; set; }
public string country_code { get; set; }
}
public class Billing_Address
{
public string line1 { get; set; }
public string line2 { get; set; }
public string city { get; set; }
public string state { get; set; }
public string postal_code { get; set; }
public string country_code { get; set; }
}
public class Transaction
{
public Amount amount { get; set; }
public Payee payee { get; set; }
public Item_List item_list { get; set; }
public Related_Resources[] related_resources { get; set; }
}
public class Amount
{
public string total { get; set; }
public string currency { get; set; }
public Details details { get; set; }
}
public class Details
{
public string subtotal { get; set; }
}
public class Payee
{
public string merchant_id { get; set; }
public string email { get; set; }
}
public class Item_List
{
public Shipping_Address1 shipping_address { get; set; }
}
public class Shipping_Address1
{
public string recipient_name { get; set; }
public string line1 { get; set; }
public string city { get; set; }
public string state { get; set; }
public string postal_code { get; set; }
public string country_code { get; set; }
}
public class Related_Resources
{
public Sale sale { get; set; }
}
public class Sale
{
public string id { get; set; }
public string state { get; set; }
public Amount amount { get; set; }
public string payment_mode { get; set; }
public string protection_eligibility { get; set; }
public string protection_eligibility_type { get; set; }
public Transaction_Fee transaction_fee { get; set; }
public string parent_payment { get; set; }
public DateTime create_time { get; set; }
public DateTime update_time { get; set; }
public Link[] links { get; set; }
}
public class Transaction_Fee
{
public string value { get; set; }
public string currency { get; set; }
}
public class Link
{
public string href { get; set; }
public string rel { get; set; }
public string method { get; set; }
}
}
// C# code to demostrate
// https://developer.paypal.com/docs/integration/web/accept-paypal-payment/
private static int RunPaypalDemo()
{
try
{
Task.Run(async () =>
{
HttpClient http = GetPaypalHttpClient();
// Step 1: Get an access token
PayPalAccessToken accessToken = await GetPayPalAccessTokenAsync(http);
Log.Information("Access Token \n{@accessToken}", accessToken);
// Step 2: Create the payment
PayPalPaymentCreatedResponse createdPayment = await CreatePaypalPaymentAsync(http, accessToken);
Log.Information("Created payment \n{@createdPayment}", createdPayment);
// Step 3: Get the approval_url and paste it into a browser
// It should look something like this: https://www.sandbox.paypal.com/cgi-bin/webscr?cmd=_express-checkout&token=EC-97965369EL8295114
var approval_url = createdPayment.links.First(x => x.rel == "approval_url").href;
Log.Information("approval_url\n{approval_url}", approval_url);
//
// IMPORTANT: Stop the program here, and re-run only the section below (comment out Step 2 and Step 3) and paste in the correct paymentId and payerId
//
// Step 4: When paypal redirects to the return_url, we need to grab the PayerID and the paymentId and execute the payment
var paymentId = "PAY-9LN814307S704373KK6UFTHI";
var payerId = "LMWV7AASBDUQQ";
PayPalPaymentExecutedResponse executedPayment = await ExecutePaypalPaymentAsync(http, accessToken, paymentId, payerId);
Log.Information("Executed payment \n{@executedPayment}", executedPayment);
}).Wait();
}
catch (Exception ex)
{
Log.Error(ex, "Failed to login to PalPal");
return 1;
}
return 0;
}
private static HttpClient GetPaypalHttpClient()
{
const string sandbox = "https://api.sandbox.paypal.com";
var http = new HttpClient
{
BaseAddress = new Uri(sandbox),
Timeout = TimeSpan.FromSeconds(30),
};
return http;
}
private static async Task<PayPalAccessToken> GetPayPalAccessTokenAsync(HttpClient http)
{
var clientId = Config.Instance.PayPalClientId;
var secret = Config.Instance.PayPalSecret;
byte[] bytes = Encoding.GetEncoding("iso-8859-1").GetBytes($"{clientId}:{secret}");
HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Post, "/v1/oauth2/token");
request.Headers.Authorization = new AuthenticationHeaderValue("Basic", Convert.ToBase64String(bytes));
var form = new Dictionary<string, string>
{
["grant_type"] = "client_credentials"
};
request.Content = new FormUrlEncodedContent(form);
HttpResponseMessage response = await http.SendAsync(request);
string content = await response.Content.ReadAsStringAsync();
PayPalAccessToken accessToken = JsonConvert.DeserializeObject<PayPalAccessToken>(content);
return accessToken;
}
private static async Task<PayPalPaymentCreatedResponse> CreatePaypalPaymentAsync(HttpClient http, PayPalAccessToken accessToken)
{
HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Post, "v1/payments/payment");
request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", accessToken.access_token);
var payment = JObject.FromObject(new
{
intent = "sale",
redirect_urls = new
{
return_url = "http://example.com/your_redirect_url.html",
cancel_url = "http://example.com/your_cancel_url.html"
},
payer = new { payment_method = "paypal" },
transactions = JArray.FromObject(new[]
{
new
{
amount = new
{
total = 7.47,
currency = "USD"
}
}
})
});
request.Content = new StringContent(JsonConvert.SerializeObject(payment), Encoding.UTF8, "application/json");
HttpResponseMessage response = await http.SendAsync(request);
string content = await response.Content.ReadAsStringAsync();
PayPalPaymentCreatedResponse paypalPaymentCreated = JsonConvert.DeserializeObject<PayPalPaymentCreatedResponse>(content);
return paypalPaymentCreated;
}
private static async Task<PayPalPaymentExecutedResponse> ExecutePaypalPaymentAsync(HttpClient http, PayPalAccessToken accessToken, string paymentId, string payerId)
{
HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Post, $"v1/payments/payment/{paymentId}/execute");
request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", accessToken.access_token);
var payment = JObject.FromObject(new
{
payer_id = payerId
});
request.Content = new StringContent(JsonConvert.SerializeObject(payment), Encoding.UTF8, "application/json");
HttpResponseMessage response = await http.SendAsync(request);
string content = await response.Content.ReadAsStringAsync();
PayPalPaymentExecutedResponse executedPayment = JsonConvert.DeserializeObject<PayPalPaymentExecutedResponse>(content);
return executedPayment;
}
@bernatgy
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Thank you so much for this one... I have successfully "ported" all of the PayPal SDK's features which we needed, using parts of Program.cs.

@eriadel
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eriadel commented May 16, 2018

Great sample Jake! Is there any chance to figure out what's the PayPalAccessToken type ?
I can't see the definition in the code. Your help would be appreciated!

@vrait35
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vrait35 commented Oct 1, 2018

from where has PayPalAccessToken and other classes in Program.cs undertaken?

@muhammadbahrami
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Thank you ... ;*

@kevinah95
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class PayPalAccessToken
{
    public string scope { get; set; }
    public string access_token { get; set; }
    public string token_type { get; set; }
    public string app_id { get; set; }
    public int expires_in { get; set; }
    public string nonce { get; set; }
}

This is the PayPalAccessToken class.

@kite57
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kite57 commented Sep 26, 2021

Thank you for the wonderful explanation, do you have created any sample with creditcard and debitcard?

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