Sample code for 30+ languages & platforms
Java

Amazon Pay - Complete Checkout Session

See more Amazon Pay Examples

Complete Checkout Session after the buyer returns to checkoutResultReturnUrl to finalize the paymentIntent.

Chilkat Java Downloads

Java
import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

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

    CkHttp http = new CkHttp();

    //  Implements the following CURL command:

    //  curl "https://pay-api.amazon.com/:version/checkoutSessions/:checkoutSessionId/complete" \
    //  -X POST
    //  -H "authorization:Px2e5oHhQZ88vVhc0DO%2FsShHj8MDDg%3DEXAMPLESIGNATURE"
    //  -H "x-amz-pay-date:20201012T235046Z"
    //  -H "x-amz-pay-idempotency-key:AVLo5tI10BHgEk2jEXAMPLEKEY"
    //  -d '{
    //      "chargeAmount": {
    //          "amount": "14.00",
    //          "currencyCode": "USD"
    //      }
    //  }'

    //  Use the following online tool to generate HTTP code from a CURL command
    //  Convert a cURL Command to HTTP Source Code

    //  Use this online tool to generate code from sample JSON:
    //  Generate Code to Create JSON

    //  The following JSON is sent in the request body.

    //  {
    //    "chargeAmount": {
    //      "amount": "14.00",
    //      "currencyCode": "USD"
    //    }
    //  }

    CkJsonObject json = new CkJsonObject();
    json.UpdateString("chargeAmount.amount","14.00");
    json.UpdateString("chargeAmount.currencyCode","USD");

    //  Load your Amazon Pay private key.  
    //  There are many other ways to load private keys into the Chilkat private key object, such as from different formats,
    //  or from in-memory strings or bytes.
    CkPrivateKey privKey = new CkPrivateKey();
    success = privKey.LoadPemFile("C:/someDir/myAmazonPayPrivateKey.pem");
    if (success == false) {
        System.out.println(privKey.lastErrorText());
        return;
        }

    //  Provide your Amazon Pay private key and Public Key ID 
    //  Use your public key ID here.  It must be the one associated with the private key.
    //  Note: The SetAuthPrivateKey method was added in Chilkat v9.5.0.89
    String publicKeyId = "SANDBOX-AHEGSJCM3L2S637RBGABLAFW";
    success = http.SetAuthPrivateKey(publicKeyId,privKey);
    if (success == false) {
        System.out.println(http.lastErrorText());
        return;
        }

    //  Note: When the private key is provided as shown above, Chilkat will automatically add the required x-amz-pay-* headers to the HTTP request,
    //  and will also sign the request.  Nothing more is needed.
    //  Chilkat automatically generates and adds the following headers:
    //  
    //  x-amz-pay-date
    //  x-amz-pay-host
    //  x-amz-pay-region
    //  x-amz-pay-idempotency-key
    //  Authorization

    http.put_Accept("application/json");

    //  To use the live system, replace "sandbox" with "live" in the URL passed to HttpJson.
    //  Also, make sure to use the correct region: pay-api.amazon.com, pay-api.amazon.eu, or pay-api.amazon.jp
    success = http.SetUrlVar("sessionId","62b7d028-6c7c-4a43-b077-3897dff27c5b");
    CkHttpResponse resp = new CkHttpResponse();
    success = http.HttpJson("POST","https://pay-api.amazon.eu/sandbox/v2/checkoutSessions/{$sessionId}/complete",json,"application/json",resp);
    if (success == false) {
        System.out.println(http.lastErrorText());
        return;
        }

    CkStringBuilder sbResponseBody = new CkStringBuilder();
    resp.GetBodySb(sbResponseBody);
    CkJsonObject jResp = new CkJsonObject();
    jResp.LoadSb(sbResponseBody);
    jResp.put_EmitCompact(false);

    //  If the status code is not equal to 200, this will display error information.
    System.out.println("Response Body:");
    System.out.println(jResp.emit());

    int respStatusCode = resp.get_StatusCode();
    System.out.println("Response Status Code = " + respStatusCode);
    if (respStatusCode != 200) {

        //  A sample response body for the case where the session ID does not exist:
        //  	{
        //  	  "reasonCode": "ResourceNotFound",
        //  	  "message": "Resource you are trying to access is not available. Requested path '/sandbox/v2/checkoutSessions/bd504926-f659-4ad7-a1a9-9a747aaf5275'"
        //  	}

        //  Another sample failure response (status code = 422)
        //  	{
        //  	  "reasonCode": "InvalidCheckoutSessionStatus",
        //  	  "message": "You tried to call an operation on a Checkout Session that is in a state where that operation is not allowed"
        //  	}

        System.out.println("Failed.");
        return;
        }

    //  Sample JSON response:
    //  (Sample code for parsing the JSON response is shown below)

    //  {
    //    "checkoutSessionId": "bd504926-f659-4ad7-a1a9-9a747aaf5275",
    //    "webCheckoutDetails": null,
    //    "chargePermissionType": "OneTime",
    //    "recurringMetadata": null,
    //    "productType": null,
    //    "paymentDetails": null,
    //    "merchantMetadata": null,
    //    "supplementaryData": null,
    //    "buyer": null,
    //    "billingAddress": null,
    //    "paymentPreferences": [
    //      null
    //    ],
    //    "statusDetails": {
    //      "state": "Completed",
    //      "reasonCode": null,
    //      "reasonDescription": null,
    //      "lastUpdatedTimestamp": "20191015T204327Z"
    //    },
    //    "shippingAddress": null,
    //    "platformId": null,
    //    "chargePermissionId": "S01-5105180-3221187",
    //    "chargeId": "S01-5105180-3221187-C056351",
    //    "constraints": [
    //      null
    //    ],
    //    "creationTimestamp": "20191015T204313Z",
    //    "expirationTimestamp": null,
    //    "storeId": null,
    //    "deliverySpecifications": null,
    //    "providerMetadata": null,
    //    "releaseEnvironment": null
    //  }

    //  Sample code for parsing the JSON response...
    //  Use the following online tool to generate parsing code from sample JSON:
    //  Generate Parsing Code from JSON

    boolean nullVal;

    String checkoutSessionId = jResp.stringOf("checkoutSessionId");
    String webCheckoutDetails = jResp.stringOf("webCheckoutDetails");
    String chargePermissionType = jResp.stringOf("chargePermissionType");
    String recurringMetadata = jResp.stringOf("recurringMetadata");
    String productType = jResp.stringOf("productType");
    String paymentDetails = jResp.stringOf("paymentDetails");
    String merchantMetadata = jResp.stringOf("merchantMetadata");
    String supplementaryData = jResp.stringOf("supplementaryData");
    String buyer = jResp.stringOf("buyer");
    String billingAddress = jResp.stringOf("billingAddress");
    String statusDetailsState = jResp.stringOf("statusDetails.state");
    String statusDetailsReasonCode = jResp.stringOf("statusDetails.reasonCode");
    String statusDetailsReasonDescription = jResp.stringOf("statusDetails.reasonDescription");
    String statusDetailsLastUpdatedTimestamp = jResp.stringOf("statusDetails.lastUpdatedTimestamp");
    String shippingAddress = jResp.stringOf("shippingAddress");
    String platformId = jResp.stringOf("platformId");
    String chargePermissionId = jResp.stringOf("chargePermissionId");
    String chargeId = jResp.stringOf("chargeId");
    String creationTimestamp = jResp.stringOf("creationTimestamp");
    String expirationTimestamp = jResp.stringOf("expirationTimestamp");
    String storeId = jResp.stringOf("storeId");
    String deliverySpecifications = jResp.stringOf("deliverySpecifications");
    String providerMetadata = jResp.stringOf("providerMetadata");
    String releaseEnvironment = jResp.stringOf("releaseEnvironment");
    int i = 0;
    int count_i = jResp.SizeOfArray("paymentPreferences");
    while (i < count_i) {
        jResp.put_I(i);
        nullVal = jResp.IsNullOf("paymentPreferences[i]");
        i = i+1;
        }

    i = 0;
    count_i = jResp.SizeOfArray("constraints");
    while (i < count_i) {
        jResp.put_I(i);
        nullVal = jResp.IsNullOf("constraints[i]");
        i = i+1;
        }
  }
}