(Objective-C) Amazon Pay - Get Charge

See more Amazon Pay Examples

Get Charge details such as charge amount and authorization state. Use this operation to determine if authorization or capture was successful.

Note: This example requires Chilkat v9.5.0.89 or later. Contact support@chilkatsoft.com to get a v9.5.0.89 pre-release for testing.

For more information, see https://developer.amazon.com/docs/amazon-pay-api-v2/charge.html#get-charge

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#import <CkoHttp.h>
#import <CkoPrivateKey.h>
#import <NSString.h>
#import <CkoStringBuilder.h>
#import <CkoJsonObject.h>

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

CkoHttp *http = [[CkoHttp alloc] init];
BOOL success;

// Implements the following CURL command:

// curl "https://pay-api.amazon.com/:version/charges/:chargeId"
//  -H "authorization:Px2e5oHhQZ88vVhc0DO%2FsShHj8MDDg%3DEXAMPLESIGNATURE"
//  -H "x-amz-pay-date:20201012T235046Z"
//  -X GET

// 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.
CkoPrivateKey *privKey = [[CkoPrivateKey alloc] init];
success = [privKey LoadPemFile: @"C:/someDir/myAmazonPayPrivateKey.pem"];
if (success == NO) {
    NSLog(@"%@",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
NSString *publicKeyId = @"SANDBOX-AHEGSJCM3L2S637RBGABLAFW";
success = [http SetAuthPrivateKey: publicKeyId privKey: privKey];
if (success == NO) {
    NSLog(@"%@",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
// Authorization

http.Accept = @"application/json";

int respStatusCode = 0;

CkoStringBuilder *sbResponseBody = [[CkoStringBuilder alloc] init];
success = [http SetUrlVar: @"chargeId" value: @"P21-1111111-1111111"];
// To use the live system, replace "sandbox" with "live" in the URL passed to QuickGetSb.
// Also, make sure to use the correct region: pay-api.amazon.com, pay-api.amazon.eu, or pay-api.amazon.jp
success = [http QuickGetSb: @"https://pay-api.amazon.eu/sandbox/v2/charges/{$chargeId}" sbContent: sbResponseBody];
if (success == NO) {
    // If the LastStatus is not equal to 0, then we received a response, but it was an error response.
    respStatusCode = [http.LastStatus intValue];
    if (respStatusCode != 0) {
        NSLog(@"%@%d",@"Response Status Code = ",respStatusCode);
        NSLog(@"%@",@"Response body:");
        NSLog(@"%@",http.LastResponseBody);
    }
    else {
        NSLog(@"%@",http.LastErrorText);
    }

    return;
}

CkoJsonObject *jResp = [[CkoJsonObject alloc] init];
[jResp LoadSb: sbResponseBody];
jResp.EmitCompact = NO;

NSLog(@"%@",@"Response Body:");
NSLog(@"%@",[jResp Emit]);

respStatusCode = [http.LastStatus intValue];
NSLog(@"%@%d",@"Response Status Code = ",respStatusCode);
// We expect a 200 status code for success.
// Note: Some Amazon Pay API calls return 200 for success, others return 201.
if (respStatusCode != 200) {
    NSLog(@"%@",@"Failed.");
    return;
}

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

// {
//      "chargeId": "P21-1111111-1111111-C111111",
//      "chargePermissionId": "P21-1111111-1111111",
//      "chargeAmount": {
//          "amount": "14.00",
//          "currencyCode": "USD"
//      },
//      "captureAmount": {
//          "amount": "14.00",
//          "currencyCode": "USD"
//      },
//      "refundedAmount": {
//          "amount": "0.00",
//          "currencyCode": "USD"
//      },
//      "convertedAmount": "14.00",
//      "conversionRate": "1.00",
//      "softDescriptor": "Descriptor",
//      "merchantMetadata": null,
//      "providerMetadata": {
//          "providerReferenceId": null
//      },
//      "statusDetails":{
//          "state": "Captured",
//          "reasonCode": null,
//          "reasonDescription": null,
//          "lastUpdatedTimestamp": "20190714T155300Z"
//      },
//      "creationTimestamp": "20190714T155300Z",
//      "expirationTimestamp": "20190715T155300Z",
//      "releaseEnvironment": "Sandbox"
// }

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

NSString *chargeId = [jResp StringOf: @"chargeId"];
NSString *chargePermissionId = [jResp StringOf: @"chargePermissionId"];
NSString *chargeAmountAmount = [jResp StringOf: @"chargeAmount.amount"];
NSString *chargeAmountCurrencyCode = [jResp StringOf: @"chargeAmount.currencyCode"];
NSString *captureAmountAmount = [jResp StringOf: @"captureAmount.amount"];
NSString *captureAmountCurrencyCode = [jResp StringOf: @"captureAmount.currencyCode"];
NSString *refundedAmountAmount = [jResp StringOf: @"refundedAmount.amount"];
NSString *refundedAmountCurrencyCode = [jResp StringOf: @"refundedAmount.currencyCode"];
NSString *convertedAmount = [jResp StringOf: @"convertedAmount"];
NSString *conversionRate = [jResp StringOf: @"conversionRate"];
NSString *softDescriptor = [jResp StringOf: @"softDescriptor"];
NSString *merchantMetadata = [jResp StringOf: @"merchantMetadata"];
NSString *providerMetadataProviderReferenceId = [jResp StringOf: @"providerMetadata.providerReferenceId"];
NSString *statusDetailsState = [jResp StringOf: @"statusDetails.state"];
NSString *statusDetailsReasonCode = [jResp StringOf: @"statusDetails.reasonCode"];
NSString *statusDetailsReasonDescription = [jResp StringOf: @"statusDetails.reasonDescription"];
NSString *statusDetailsLastUpdatedTimestamp = [jResp StringOf: @"statusDetails.lastUpdatedTimestamp"];
NSString *creationTimestamp = [jResp StringOf: @"creationTimestamp"];
NSString *expirationTimestamp = [jResp StringOf: @"expirationTimestamp"];
NSString *releaseEnvironment = [jResp StringOf: @"releaseEnvironment"];