Dart

Amazon Pay - Complete Checkout Session

See more Amazon Pay Examples

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

import 'package:chilkat/chilkat.dart';

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

  final http = 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"
  //   }
  // }

  final json = 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.
  final privKey = CkPrivateKey();
  try {
    privKey.loadPemFile('C:/someDir/myAmazonPayPrivateKey.pem');
  } on ChilkatException catch (e) {
    print(e.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
  final publicKeyId = 'SANDBOX-AHEGSJCM3L2S637RBGABLAFW';
  try {
    http.setAuthPrivateKey(publicKeyId, privKey);
  } on ChilkatException catch (e) {
    print(e.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.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
  http.setUrlVar('sessionId', '62b7d028-6c7c-4a43-b077-3897dff27c5b');
  final resp = CkHttpResponse();
  try {
    http.httpJson('POST', 'https://pay-api.amazon.eu/sandbox/v2/checkoutSessions/{\$sessionId}/complete', json, 'application/json', resp);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  final sbResponseBody = CkStringBuilder();
  resp.getBodySb(sbResponseBody);
  final jResp = CkJsonObject();
  jResp.loadSb(sbResponseBody);
  jResp.emitCompact = false;

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

  final respStatusCode = resp.statusCode;
  print('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"
    // 	}

    print('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

  final checkoutSessionId = jResp.stringOf('checkoutSessionId');
  final webCheckoutDetails = jResp.stringOf('webCheckoutDetails');
  final chargePermissionType = jResp.stringOf('chargePermissionType');
  final recurringMetadata = jResp.stringOf('recurringMetadata');
  final productType = jResp.stringOf('productType');
  final paymentDetails = jResp.stringOf('paymentDetails');
  final merchantMetadata = jResp.stringOf('merchantMetadata');
  final supplementaryData = jResp.stringOf('supplementaryData');
  final buyer = jResp.stringOf('buyer');
  final billingAddress = jResp.stringOf('billingAddress');
  final statusDetailsState = jResp.stringOf('statusDetails.state');
  final statusDetailsReasonCode = jResp.stringOf('statusDetails.reasonCode');
  final statusDetailsReasonDescription = jResp.stringOf('statusDetails.reasonDescription');
  final statusDetailsLastUpdatedTimestamp = jResp.stringOf('statusDetails.lastUpdatedTimestamp');
  final shippingAddress = jResp.stringOf('shippingAddress');
  final platformId = jResp.stringOf('platformId');
  final chargePermissionId = jResp.stringOf('chargePermissionId');
  final chargeId = jResp.stringOf('chargeId');
  final creationTimestamp = jResp.stringOf('creationTimestamp');
  final expirationTimestamp = jResp.stringOf('expirationTimestamp');
  final storeId = jResp.stringOf('storeId');
  final deliverySpecifications = jResp.stringOf('deliverySpecifications');
  final providerMetadata = jResp.stringOf('providerMetadata');
  final releaseEnvironment = jResp.stringOf('releaseEnvironment');
  var i = 0;
  var countI = jResp.sizeOfArray('paymentPreferences');
  while (i < countI) {
    jResp.i = i;
    jResp.isNullOf('paymentPreferences[i]');
    i++;
  }

  i = 0;
  countI = jResp.sizeOfArray('constraints');
  while (i < countI) {
    jResp.i = i;
    jResp.isNullOf('constraints[i]');
    i++;
  }
}