(.NET Core C#) PayPal - Refund Captured Payment

Refunds a captured payment, by ID. Include an amount object in the JSON request body.

Note: This example requires Chilkat v9.5.0.65 or greater.

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// Note: Requires Chilkat v9.5.0.64 or greater.

// This requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// Load our previously obtained access token. (see PayPal OAuth2 Access Token)
Chilkat.JsonObject jsonToken = new Chilkat.JsonObject();
jsonToken.LoadFile("qa_data/tokens/paypal.json");

// Build the Authorization request header field value.
Chilkat.StringBuilder sbAuth = new Chilkat.StringBuilder();
// token_type should be "Bearer"
sbAuth.Append(jsonToken.StringOf("token_type"));
sbAuth.Append(" ");
sbAuth.Append(jsonToken.StringOf("access_token"));

// Make the initial connection.
// A single REST object, once connected, can be used for many PayPal REST API calls.
// The auto-reconnect indicates that if the already-established HTTPS connection is closed,
// then it will be automatically re-established as needed.
Chilkat.Rest rest = new Chilkat.Rest();
bool bAutoReconnect = true;
bool success = rest.Connect("api.sandbox.paypal.com",443,true,bAutoReconnect);
if (success != true) {
    Debug.WriteLine(rest.LastErrorText);
    return;
}

// ----------------------------------------------------------------------------------------------
// The code above this comment could be placed inside a function/subroutine within the application
// because the connection does not need to be made for every request.  Once the connection is made
// the app may send many requests..
// ----------------------------------------------------------------------------------------------

// To refund a particular amount, build JSON such as this:
Chilkat.JsonObject json = new Chilkat.JsonObject();
json.EmitCompact = false;
json.UpdateString("amount.total","4.54");
json.UpdateString("amount.currency","USD");
json.UpdateString("description","Athletic socks");
json.UpdateString("reason","Refunding because color was incorrect");
Debug.WriteLine(json.Emit());

// The JSON:

// 	{ 
// 	  "amount": { 
// 	    "total": "4.54",
// 	    "currency": "USD"
// 	  },
// 	  "description": "Athletic socks",
// 	  "reason": "Refunding because color was incorrect"
// 	}
// 
rest.AddHeader("Authorization",sbAuth.GetAsString());
rest.AddHeader("Content-Type","application/json");

// The capture ID is added to the path.
// To list your captures: Find Captures. 
Chilkat.StringBuilder sbPath = new Chilkat.StringBuilder();
sbPath.Append("/v1/payments/capture/capture_id/refund");
int numReplaced = sbPath.Replace("capture_id","1LY5310469661362J");

// Send the POST request containign the JSON in the request body, and get the JSON response.
Chilkat.StringBuilder sbJsonRequest = new Chilkat.StringBuilder();
json.EmitCompact = true;
json.EmitSb(sbJsonRequest);
Chilkat.StringBuilder sbJsonResponse = new Chilkat.StringBuilder();

success = rest.FullRequestSb("POST",sbPath.GetAsString(),sbJsonRequest,sbJsonResponse);
if (success != true) {
    Debug.WriteLine(rest.LastErrorText);
    return;
}

json.EmitCompact = false;
json.LoadSb(sbJsonResponse);

Debug.WriteLine("Response Status Code = " + Convert.ToString(rest.ResponseStatusCode));

// Did we get a 201 success response?
if (rest.ResponseStatusCode != 201) {
    Debug.WriteLine(json.Emit());
    Debug.WriteLine("Failed.");
    return;
}

Debug.WriteLine(json.Emit());
Debug.WriteLine("Success.");

// A successful JSON response:
// The "id" is the refund_id.

// 	{ 
// 	  "id": "77B77607RR7243500",
// 	  "create_time": "2016-11-27T01:38:25Z",
// 	  "update_time": "2016-11-27T01:38:25Z",
// 	  "state": "completed",
// 	  "amount": { 
// 	    "total": "4.54",
// 	    "currency": "USD"
// 	  },
// 	  "capture_id": "1LY5310469661362J",
// 	  "parent_payment": "PAY-2CY489250W145633HLA3DK3Y",
// 	  "links": [
// 	    { 
// 	      "href": "https://api.sandbox.paypal.com/v1/payments/refund/77B77607RR7243500",
// 	      "rel": "self",
// 	      "method": "GET"
// 	    },
// 	    { 
// 	      "href": "https://api.sandbox.paypal.com/v1/payments/payment/PAY-2CY489250W145633HLA3DK3Y",
// 	      "rel": "parent_payment",
// 	      "method": "GET"
// 	    },
// 	    { 
// 	      "href": "https://api.sandbox.paypal.com/v1/payments/capture/1LY5310469661362J",
// 	      "rel": "capture",
// 	      "method": "GET"
// 	    }
// 	  ]
// 	}