(Delphi ActiveX) Amazon Pay - Get Charge Permission

See more Amazon Pay Examples

Get Charge Permission to determine if this Charge Permission can be used to charge the buyer.

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-permission.html#get-charge-permission

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
http: TChilkatHttp;
success: Integer;
privKey: TPrivateKey;
publicKeyId: WideString;
respStatusCode: Integer;
sbResponseBody: TChilkatStringBuilder;
jResp: TChilkatJsonObject;
paymentDescriptor: WideString;
chargePermissionId: WideString;
chargePermissionReferenceId: WideString;
buyerBuyerId: WideString;
buyerName: WideString;
buyerEmail: WideString;
buyerPhoneNumber: WideString;
buyerPrimeMembershipTypes: WideString;
releaseEnvironment: WideString;
shippingAddressName: WideString;
shippingAddressAddressLine1: WideString;
shippingAddressAddressLine2: WideString;
shippingAddressAddressLine3: WideString;
shippingAddressCity: WideString;
shippingAddressCounty: WideString;
shippingAddressDistrict: WideString;
shippingAddressStateOrRegion: WideString;
shippingAddressPostalCode: WideString;
shippingAddressCountryCode: WideString;
shippingAddressPhoneNumber: WideString;
billingAddressName: WideString;
billingAddressAddressLine1: WideString;
billingAddressAddressLine2: WideString;
billingAddressAddressLine3: WideString;
billingAddressCity: WideString;
billingAddressCounty: WideString;
billingAddressDistrict: WideString;
billingAddressStateOrRegion: WideString;
billingAddressPostalCode: WideString;
billingAddressCountryCode: WideString;
billingAddressPhoneNumber: WideString;
statusDetailsState: WideString;
statusDetailsReasons: WideString;
statusDetailsLastUpdatedTimestamp: WideString;
creationTimestamp: WideString;
expirationTimestamp: WideString;
merchantMetadataMerchantReferenceId: WideString;
merchantMetadataMerchantStoreName: WideString;
merchantMetadataNoteToBuyer: WideString;
merchantMetadataCustomInformation: WideString;
platformId: WideString;
limitsAmountLimitAmount: WideString;
limitsAmountLimitCurrencyCode: WideString;
limitsAmountBalanceAmount: WideString;
limitsAmountBalanceCurrencyCode: WideString;
presentmentCurrency: WideString;
i: Integer;
count_i: Integer;

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

http := TChilkatHttp.Create(Self);

// Implements the following CURL command:

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

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

// 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.
privKey := TPrivateKey.Create(Self);
success := privKey.LoadPemFile('C:/someDir/myAmazonPayPrivateKey.pem');
if (success = 0) then
  begin
    Memo1.Lines.Add(privKey.LastErrorText);
    Exit;
  end;

// 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
publicKeyId := 'SANDBOX-AHEGSJCM3L2S637RBGABLAFW';
success := http.SetAuthPrivateKey(publicKeyId,privKey.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

// 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';

respStatusCode := 0;

sbResponseBody := TChilkatStringBuilder.Create(Self);
success := http.SetUrlVar('chargePermissionId','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/chargePermissions/{$chargePermissionId}',sbResponseBody.ControlInterface);
if (success = 0) then
  begin
    // If the LastStatus is not equal to 0, then we received a response, but it was an error response.
    respStatusCode := http.LastStatus;
    if (respStatusCode <> 0) then
      begin
        Memo1.Lines.Add('Response Status Code = ' + IntToStr(respStatusCode));
        Memo1.Lines.Add('Response body:');
        Memo1.Lines.Add(http.LastResponseBody);
      end
    else
      begin
        Memo1.Lines.Add(http.LastErrorText);
      end;
    Exit;
  end;

jResp := TChilkatJsonObject.Create(Self);
jResp.LoadSb(sbResponseBody.ControlInterface);
jResp.EmitCompact := 0;

Memo1.Lines.Add('Response Body:');
Memo1.Lines.Add(jResp.Emit());

respStatusCode := http.LastStatus;
Memo1.Lines.Add('Response Status Code = ' + IntToStr(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) then
  begin
    Memo1.Lines.Add('Failed.');
    Exit;
  end;

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

// {
//     "chargePermissionId": "chargePermission-1",
//     "chargePermissionReferenceId": null,
//     "buyer": {
//         "buyerId": "buyerId",
//         "name": "name-1",
//         "email": "name@amazon.com",
//         "phoneNumber": "800-000-0000",
//         "primeMembershipTypes": null
//     },
//     "releaseEnvironment": "Live",
//     "shippingAddress":{  // Null for PayOnly product type
//         "name": "Work",
//         "addressLine1": "440 Terry Ave",
//         "addressLine2": "",
//         "addressLine3": "",
//         "city": "Seattle",
//         "county": "King",
//         "district": "Seattle",
//         "stateOrRegion": "WA",
//         "postalCode": "98121",
//         "countryCode": "US",
//         "phoneNumber": "800-000-0000"
//     },
//     "billingAddress":{  // Only available in EU or for PayOnly product type
//         "name": "Work",
//         "addressLine1": "440 Terry Ave",
//         "addressLine2": "",
//         "addressLine3": "",
//         "city": "Seattle",
//         "county": "King",
//         "district": "Seattle",
//         "stateOrRegion": "WA",
//         "postalCode": "98121",
//         "countryCode": "US",
//         "phoneNumber": "800-000-0000"
//     },
//     "paymentPreferences":[{
//         "paymentDescriptor": null
//     }],
//     "statusDetails":{
//         "state": "Chargeable",
//         "reasons":null,
//         "lastUpdatedTimestamp": "20190714T155300Z"
//     },
//     "creationTimestamp": "20190714T155300Z",
//     "expirationTimestamp": "20190715T155300Z",
//     "merchantMetadata":{
//         "merchantReferenceId": "123-77-876", 
//         "merchantStoreName": "AmazonTestStoreFront",
//         "noteToBuyer": "merchantNoteForBuyer",
//         "customInformation": "This is custom information"
//     },
//     "platformId": "SPId",
//     "limits": {
//         "amountLimit": {
//             "amount": "14.00",
//             "currencyCode": "USD"
//         },
//         "amountBalance": {
//             "amount": "14.00",
//             "currencyCode": "USD"
//         }
//     },
//     "presentmentCurrency": "USD"
// }

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

chargePermissionId := jResp.StringOf('chargePermissionId');
chargePermissionReferenceId := jResp.StringOf('chargePermissionReferenceId');
buyerBuyerId := jResp.StringOf('buyer.buyerId');
buyerName := jResp.StringOf('buyer.name');
buyerEmail := jResp.StringOf('buyer.email');
buyerPhoneNumber := jResp.StringOf('buyer.phoneNumber');
buyerPrimeMembershipTypes := jResp.StringOf('buyer.primeMembershipTypes');
releaseEnvironment := jResp.StringOf('releaseEnvironment');
shippingAddressName := jResp.StringOf('shippingAddress.name');
shippingAddressAddressLine1 := jResp.StringOf('shippingAddress.addressLine1');
shippingAddressAddressLine2 := jResp.StringOf('shippingAddress.addressLine2');
shippingAddressAddressLine3 := jResp.StringOf('shippingAddress.addressLine3');
shippingAddressCity := jResp.StringOf('shippingAddress.city');
shippingAddressCounty := jResp.StringOf('shippingAddress.county');
shippingAddressDistrict := jResp.StringOf('shippingAddress.district');
shippingAddressStateOrRegion := jResp.StringOf('shippingAddress.stateOrRegion');
shippingAddressPostalCode := jResp.StringOf('shippingAddress.postalCode');
shippingAddressCountryCode := jResp.StringOf('shippingAddress.countryCode');
shippingAddressPhoneNumber := jResp.StringOf('shippingAddress.phoneNumber');
billingAddressName := jResp.StringOf('billingAddress.name');
billingAddressAddressLine1 := jResp.StringOf('billingAddress.addressLine1');
billingAddressAddressLine2 := jResp.StringOf('billingAddress.addressLine2');
billingAddressAddressLine3 := jResp.StringOf('billingAddress.addressLine3');
billingAddressCity := jResp.StringOf('billingAddress.city');
billingAddressCounty := jResp.StringOf('billingAddress.county');
billingAddressDistrict := jResp.StringOf('billingAddress.district');
billingAddressStateOrRegion := jResp.StringOf('billingAddress.stateOrRegion');
billingAddressPostalCode := jResp.StringOf('billingAddress.postalCode');
billingAddressCountryCode := jResp.StringOf('billingAddress.countryCode');
billingAddressPhoneNumber := jResp.StringOf('billingAddress.phoneNumber');
statusDetailsState := jResp.StringOf('statusDetails.state');
statusDetailsReasons := jResp.StringOf('statusDetails.reasons');
statusDetailsLastUpdatedTimestamp := jResp.StringOf('statusDetails.lastUpdatedTimestamp');
creationTimestamp := jResp.StringOf('creationTimestamp');
expirationTimestamp := jResp.StringOf('expirationTimestamp');
merchantMetadataMerchantReferenceId := jResp.StringOf('merchantMetadata.merchantReferenceId');
merchantMetadataMerchantStoreName := jResp.StringOf('merchantMetadata.merchantStoreName');
merchantMetadataNoteToBuyer := jResp.StringOf('merchantMetadata.noteToBuyer');
merchantMetadataCustomInformation := jResp.StringOf('merchantMetadata.customInformation');
platformId := jResp.StringOf('platformId');
limitsAmountLimitAmount := jResp.StringOf('limits.amountLimit.amount');
limitsAmountLimitCurrencyCode := jResp.StringOf('limits.amountLimit.currencyCode');
limitsAmountBalanceAmount := jResp.StringOf('limits.amountBalance.amount');
limitsAmountBalanceCurrencyCode := jResp.StringOf('limits.amountBalance.currencyCode');
presentmentCurrency := jResp.StringOf('presentmentCurrency');
i := 0;
count_i := jResp.SizeOfArray('paymentPreferences');
while i < count_i do
  begin
    jResp.I := i;
    paymentDescriptor := jResp.StringOf('paymentPreferences[i].paymentDescriptor');
    i := i + 1;
  end;
end;