(PowerBuilder) Amazon Pay - Create Checkout Session

See more Amazon Pay Examples

Create a new Amazon Pay Checkout Session.

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/checkout-session.html#create-checkout-session

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_Http
integer li_Success
oleobject loo_Json
integer i
oleobject loo_PrivKey
string ls_PublicKeyId
oleobject loo_Resp
oleobject loo_SbResponseBody
oleobject loo_JResp
integer li_RespStatusCode
integer li_NullVal
string ls_ConstraintId
string ls_Description
string ls_StrVal
string ls_CheckoutSessionId
string ls_WebCheckoutDetailsCheckoutReviewReturnUrl
string ls_WebCheckoutDetailsCheckoutResultReturnUrl
string ls_WebCheckoutDetailsCheckoutCancelUrl
string ls_WebCheckoutDetailsAmazonPayRedirectUrl
string ls_ProductType
string ls_ChargePermissionType
string ls_RecurringMetadataFrequencyUnit
string ls_RecurringMetadataFrequencyValue
string ls_RecurringMetadataAmountAmount
string ls_RecurringMetadataAmountCurrencyCode
string ls_PaymentDetailsPaymentIntent
integer li_PaymentDetailsCanHandlePendingAuthorization
string ls_PaymentDetailsChargeAmount
string ls_PaymentDetailsTotalOrderAmount
string ls_PaymentDetailsSoftDescriptor
string ls_PaymentDetailsPresentmentCurrency
string ls_PaymentDetailsAllowOvercharge
string ls_PaymentDetailsExtendExpiration
string ls_MerchantMetadataMerchantReferenceId
string ls_MerchantMetadataMerchantStoreName
string ls_MerchantMetadataNoteToBuyer
string ls_MerchantMetadataCustomInformation
string ls_SupplementaryData
string ls_Buyer
string ls_BillingAddress
string ls_StatusDetailsState
string ls_StatusDetailsReasonCode
string ls_StatusDetailsReasonDescription
string ls_StatusDetailsLastUpdatedTimestamp
string ls_ShippingAddress
string ls_PlatformId
string ls_ChargePermissionId
string ls_ChargeId
string ls_CreationTimestamp
string ls_ExpirationTimestamp
string ls_StoreId
string ls_DeliverySpecificationsAddressRestrictionsType
string ls_ProviderMetadataProviderReferenceId
string ls_ReleaseEnvironment
integer li_Count_i

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

loo_Http = create oleobject
// Use "Chilkat_9_5_0.Http" for versions of Chilkat < 10.0.0
li_rc = loo_Http.ConnectToNewObject("Chilkat.Http")
if li_rc < 0 then
    destroy loo_Http
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// Implements the following CURL command:

// curl "https://pay-api.amazon.com/:version/checkoutSessions/" \
// -X POST
// -H "authorization:Px2e5oHhQZ88vVhc0DO%2FsShHj8MDDg%3DEXAMPLESIGNATURE"
// -H "x-amz-pay-date:20201012T235046Z"
// -H "x-amz-pay-idempotency-key:AVLo5tI10BHgEk2jEXAMPLEKEY"
// -d '{
//     "webCheckoutDetails": {
//         "checkoutReviewReturnUrl": "https://a.com/merchant-review-page"
//     },
//     "storeId": "amzn1.application-oa2-client.8b5e45312b5248b69eeaStoreId",
//     "scopes": ["name", "email", "phoneNumber", "billingAddress"],
//     "deliverySpecifications": {
//         "specialRestrictions": ["RestrictPOBoxes"],
//         "addressRestrictions": {
//             "type": "Allowed",
//             "restrictions": {
//                 "US": {
//                     "statesOrRegions": ["WA"],
//                     "zipCodes": ["95050", "93405"]
//                 },
//                 "GB": {
//                     "zipCodes": ["72046", "72047"]
//                 },
//                 "IN": {
//                     "statesOrRegions": ["AP"]
//                 },
//                 "JP": {}
//             }
//         }
//     }
// }'

// 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.

// {
//   "webCheckoutDetails": {
//     "checkoutReviewReturnUrl": "https://a.com/merchant-review-page"
//   },
//   "storeId": "amzn1.application-oa2-client.8b5e45312b5248b69eeaStoreId",
//   "scopes": [
//     "name",
//     "email",
//     "phoneNumber",
//     "billingAddress"
//   ],
//   "deliverySpecifications": {
//     "specialRestrictions": [
//       "RestrictPOBoxes"
//     ],
//     "addressRestrictions": {
//       "type": "Allowed",
//       "restrictions": {
//         "US": {
//           "statesOrRegions": [
//             "WA"
//           ],
//           "zipCodes": [
//             "95050",
//             "93405"
//           ]
//         },
//         "GB": {
//           "zipCodes": [
//             "72046",
//             "72047"
//           ]
//         },
//         "IN": {
//           "statesOrRegions": [
//             "AP"
//           ]
//         },
//         "JP": {}
//       }
//     }
//   }
// }

loo_Json = create oleobject
// Use "Chilkat_9_5_0.JsonObject" for versions of Chilkat < 10.0.0
li_rc = loo_Json.ConnectToNewObject("Chilkat.JsonObject")

loo_Json.UpdateString("webCheckoutDetails.checkoutReviewReturnUrl","https://a.com/merchant-review-page")
// Make sure to use your storeId here:
loo_Json.UpdateString("storeId","amzn1.application-oa2-client.8b5e45312b5248b69eeaStoreId")
i = 0
loo_Json.I = i
loo_Json.UpdateString("scopes[i]","name")
i = i + 1
loo_Json.I = i
loo_Json.UpdateString("scopes[i]","email")
i = i + 1
loo_Json.I = i
loo_Json.UpdateString("scopes[i]","phoneNumber")
i = i + 1
loo_Json.I = i
loo_Json.UpdateString("scopes[i]","billingAddress")
loo_Json.UpdateString("deliverySpecifications.specialRestrictions[0]","RestrictPOBoxes")
loo_Json.UpdateString("deliverySpecifications.addressRestrictions.type","Allowed")
loo_Json.UpdateString("deliverySpecifications.addressRestrictions.restrictions.US.statesOrRegions[0]","WA")
loo_Json.UpdateString("deliverySpecifications.addressRestrictions.restrictions.US.zipCodes[0]","95050")
loo_Json.UpdateString("deliverySpecifications.addressRestrictions.restrictions.US.zipCodes[1]","93405")
loo_Json.UpdateString("deliverySpecifications.addressRestrictions.restrictions.GB.zipCodes[0]","72046")
loo_Json.UpdateString("deliverySpecifications.addressRestrictions.restrictions.GB.zipCodes[1]","72047")
loo_Json.UpdateString("deliverySpecifications.addressRestrictions.restrictions.IN.statesOrRegions[0]","AP")
loo_Json.UpdateNewObject("deliverySpecifications.addressRestrictions.restrictions.JP")

// 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.
loo_PrivKey = create oleobject
// Use "Chilkat_9_5_0.PrivateKey" for versions of Chilkat < 10.0.0
li_rc = loo_PrivKey.ConnectToNewObject("Chilkat.PrivateKey")

li_Success = loo_PrivKey.LoadPemFile("C:/someDir/myAmazonPayPrivateKey.pem")
if li_Success = 0 then
    Write-Debug loo_PrivKey.LastErrorText
    destroy loo_Http
    destroy loo_Json
    destroy loo_PrivKey
    return
end if

// 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
ls_PublicKeyId = "SANDBOX-AHEGSJCM3L2S637RBGABLAFW"
li_Success = loo_Http.SetAuthPrivateKey(ls_PublicKeyId,loo_PrivKey)
if li_Success = 0 then
    Write-Debug loo_Http.LastErrorText
    destroy loo_Http
    destroy loo_Json
    destroy loo_PrivKey
    return
end if

// 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

loo_Http.Accept = "application/json"

// To use the live system, replace "sandbox" with "live" in the URL passed to PostJson3.
// Also, make sure to use the correct region: pay-api.amazon.com, pay-api.amazon.eu, or pay-api.amazon.jp
loo_Resp = loo_Http.PostJson3("https://pay-api.amazon.eu/sandbox/v2/checkoutSessions/","application/json",loo_Json)
if loo_Http.LastMethodSuccess = 0 then
    Write-Debug loo_Http.LastErrorText
    destroy loo_Http
    destroy loo_Json
    destroy loo_PrivKey
    return
end if

loo_SbResponseBody = create oleobject
// Use "Chilkat_9_5_0.StringBuilder" for versions of Chilkat < 10.0.0
li_rc = loo_SbResponseBody.ConnectToNewObject("Chilkat.StringBuilder")

loo_Resp.GetBodySb(loo_SbResponseBody)
loo_JResp = create oleobject
// Use "Chilkat_9_5_0.JsonObject" for versions of Chilkat < 10.0.0
li_rc = loo_JResp.ConnectToNewObject("Chilkat.JsonObject")

loo_JResp.LoadSb(loo_SbResponseBody)
loo_JResp.EmitCompact = 0

// If the status code is not equal to 201, this will display error information.
Write-Debug "Response Body:"
Write-Debug loo_JResp.Emit()

li_RespStatusCode = loo_Resp.StatusCode
Write-Debug "Response Status Code = " + string(li_RespStatusCode)
if li_RespStatusCode <> 201 then

    // The jResp would've contained an error message, similar to this:
    // 	{
    // 	  "reasonCode": "InvalidHeaderValue",
    // 	  "message": "The value AF2EGWREIPHV2S2TUFFBRDGM provided for PublicKeyId is invalid. Please verify that you are using the PublicKeyId in the correct region and environment."
    // 	}

    Write-Debug "Failed."
    destroy loo_Resp
    destroy loo_Http
    destroy loo_Json
    destroy loo_PrivKey
    destroy loo_SbResponseBody
    destroy loo_JResp
    return
end if

destroy loo_Resp

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

// {
//   "checkoutSessionId": "bd504926-f659-4ad7-a1a9-9a747aaf5275",
//   "webCheckoutDetails": {
//     "checkoutReviewReturnUrl": "https://a.com/merchant-review-page",
//     "checkoutResultReturnUrl": null,
//     "checkoutCancelUrl": null,
//     "amazonPayRedirectUrl": null
//   },
//   "productType": "PayAndShip",
//   "chargePermissionType": "Recurring",
//   "recurringMetadata": {
//     "frequency": {
//       "unit": "Month",
//       "value": "1"
//     },
//     "amount": {
//       "amount": "30",
//       "currencyCode": "USD"
//     }
//   },
//   "paymentDetails": {
//     "paymentIntent": null,
//     "canHandlePendingAuthorization": false,
//     "chargeAmount": null,
//     "totalOrderAmount": null,
//     "softDescriptor": null,
//     "presentmentCurrency": null,
//     "allowOvercharge": null,
//     "extendExpiration": null
//   },
//   "merchantMetadata": {
//     "merchantReferenceId": null,
//     "merchantStoreName": null,
//     "noteToBuyer": null,
//     "customInformation": null
//   },
//   "supplementaryData": null,
//   "buyer": null,
//   "billingAddress": null,
//   "paymentPreferences": [
//     null
//   ],
//   "statusDetails": {
//     "state": "Open",
//     "reasonCode": null,
//     "reasonDescription": null,
//     "lastUpdatedTimestamp": "20191015T204327Z"
//   },
//   "shippingAddress": null,
//   "platformId": null,
//   "chargePermissionId": null,
//   "chargeId": null,
//   "constraints": [
//     {
//       "constraintId": "BuyerNotAssociated",
//       "description": "There is no buyer associated with the Checkout Session. Return the checkout session id to the Amazon Pay Button to allow buyer to login."
//     },
//     {
//       "constraintId": "ChargeAmountNotSet",
//       "description": "chargeAmount is not set."
//     },
//     {
//       "constraintId": "CheckoutResultReturnUrlNotSet",
//       "description": "checkoutResultReturnUrl is not set."
//     },
//     {
//       "constraintId": "PaymentIntentNotSet",
//       "description": "paymentIntent is not set."
//     }
//   ],
//   "creationTimestamp": "20191015T204313Z",
//   "expirationTimestamp": "20191016T204313Z",
//   "storeId": "amzn1.application-oa2-client.8b5e45312b5248b69eeaStoreId",
//   "deliverySpecifications": {
//     "specialRestrictions": [
//       "RestrictPOBoxes"
//     ],
//     "addressRestrictions": {
//       "type": "Allowed",
//       "restrictions": {
//         "US": {
//           "statesOrRegions": [
//             "WA"
//           ],
//           "zipCodes": [
//             "95050",
//             "93405"
//           ]
//         },
//         "GB": {
//           "zipCodes": [
//             "72046",
//             "72047"
//           ]
//         },
//         "IN": {
//           "statesOrRegions": [
//             "AP"
//           ]
//         },
//         "JP": {}
//       }
//     }
//   },
//   "providerMetadata": {
//     "providerReferenceId": null
//   },
//   "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

ls_CheckoutSessionId = loo_JResp.StringOf("checkoutSessionId")
ls_WebCheckoutDetailsCheckoutReviewReturnUrl = loo_JResp.StringOf("webCheckoutDetails.checkoutReviewReturnUrl")
ls_WebCheckoutDetailsCheckoutResultReturnUrl = loo_JResp.StringOf("webCheckoutDetails.checkoutResultReturnUrl")
ls_WebCheckoutDetailsCheckoutCancelUrl = loo_JResp.StringOf("webCheckoutDetails.checkoutCancelUrl")
ls_WebCheckoutDetailsAmazonPayRedirectUrl = loo_JResp.StringOf("webCheckoutDetails.amazonPayRedirectUrl")
ls_ProductType = loo_JResp.StringOf("productType")
ls_ChargePermissionType = loo_JResp.StringOf("chargePermissionType")
ls_RecurringMetadataFrequencyUnit = loo_JResp.StringOf("recurringMetadata.frequency.unit")
ls_RecurringMetadataFrequencyValue = loo_JResp.StringOf("recurringMetadata.frequency.value")
ls_RecurringMetadataAmountAmount = loo_JResp.StringOf("recurringMetadata.amount.amount")
ls_RecurringMetadataAmountCurrencyCode = loo_JResp.StringOf("recurringMetadata.amount.currencyCode")
ls_PaymentDetailsPaymentIntent = loo_JResp.StringOf("paymentDetails.paymentIntent")
li_PaymentDetailsCanHandlePendingAuthorization = loo_JResp.BoolOf("paymentDetails.canHandlePendingAuthorization")
ls_PaymentDetailsChargeAmount = loo_JResp.StringOf("paymentDetails.chargeAmount")
ls_PaymentDetailsTotalOrderAmount = loo_JResp.StringOf("paymentDetails.totalOrderAmount")
ls_PaymentDetailsSoftDescriptor = loo_JResp.StringOf("paymentDetails.softDescriptor")
ls_PaymentDetailsPresentmentCurrency = loo_JResp.StringOf("paymentDetails.presentmentCurrency")
ls_PaymentDetailsAllowOvercharge = loo_JResp.StringOf("paymentDetails.allowOvercharge")
ls_PaymentDetailsExtendExpiration = loo_JResp.StringOf("paymentDetails.extendExpiration")
ls_MerchantMetadataMerchantReferenceId = loo_JResp.StringOf("merchantMetadata.merchantReferenceId")
ls_MerchantMetadataMerchantStoreName = loo_JResp.StringOf("merchantMetadata.merchantStoreName")
ls_MerchantMetadataNoteToBuyer = loo_JResp.StringOf("merchantMetadata.noteToBuyer")
ls_MerchantMetadataCustomInformation = loo_JResp.StringOf("merchantMetadata.customInformation")
ls_SupplementaryData = loo_JResp.StringOf("supplementaryData")
ls_Buyer = loo_JResp.StringOf("buyer")
ls_BillingAddress = loo_JResp.StringOf("billingAddress")
ls_StatusDetailsState = loo_JResp.StringOf("statusDetails.state")
ls_StatusDetailsReasonCode = loo_JResp.StringOf("statusDetails.reasonCode")
ls_StatusDetailsReasonDescription = loo_JResp.StringOf("statusDetails.reasonDescription")
ls_StatusDetailsLastUpdatedTimestamp = loo_JResp.StringOf("statusDetails.lastUpdatedTimestamp")
ls_ShippingAddress = loo_JResp.StringOf("shippingAddress")
ls_PlatformId = loo_JResp.StringOf("platformId")
ls_ChargePermissionId = loo_JResp.StringOf("chargePermissionId")
ls_ChargeId = loo_JResp.StringOf("chargeId")
ls_CreationTimestamp = loo_JResp.StringOf("creationTimestamp")
ls_ExpirationTimestamp = loo_JResp.StringOf("expirationTimestamp")
ls_StoreId = loo_JResp.StringOf("storeId")
ls_DeliverySpecificationsAddressRestrictionsType = loo_JResp.StringOf("deliverySpecifications.addressRestrictions.type")
ls_ProviderMetadataProviderReferenceId = loo_JResp.StringOf("providerMetadata.providerReferenceId")
ls_ReleaseEnvironment = loo_JResp.StringOf("releaseEnvironment")
i = 0
li_Count_i = loo_JResp.SizeOfArray("paymentPreferences")
do while i < li_Count_i
    loo_JResp.I = i
    li_NullVal = loo_JResp.IsNullOf("paymentPreferences[i]")
    i = i + 1
loop
i = 0
li_Count_i = loo_JResp.SizeOfArray("constraints")
do while i < li_Count_i
    loo_JResp.I = i
    ls_ConstraintId = loo_JResp.StringOf("constraints[i].constraintId")
    ls_Description = loo_JResp.StringOf("constraints[i].description")
    i = i + 1
loop
i = 0
li_Count_i = loo_JResp.SizeOfArray("deliverySpecifications.specialRestrictions")
do while i < li_Count_i
    loo_JResp.I = i
    ls_StrVal = loo_JResp.StringOf("deliverySpecifications.specialRestrictions[i]")
    i = i + 1
loop
i = 0
li_Count_i = loo_JResp.SizeOfArray("deliverySpecifications.addressRestrictions.restrictions.US.statesOrRegions")
do while i < li_Count_i
    loo_JResp.I = i
    ls_StrVal = loo_JResp.StringOf("deliverySpecifications.addressRestrictions.restrictions.US.statesOrRegions[i]")
    i = i + 1
loop
i = 0
li_Count_i = loo_JResp.SizeOfArray("deliverySpecifications.addressRestrictions.restrictions.US.zipCodes")
do while i < li_Count_i
    loo_JResp.I = i
    ls_StrVal = loo_JResp.StringOf("deliverySpecifications.addressRestrictions.restrictions.US.zipCodes[i]")
    i = i + 1
loop
i = 0
li_Count_i = loo_JResp.SizeOfArray("deliverySpecifications.addressRestrictions.restrictions.GB.zipCodes")
do while i < li_Count_i
    loo_JResp.I = i
    ls_StrVal = loo_JResp.StringOf("deliverySpecifications.addressRestrictions.restrictions.GB.zipCodes[i]")
    i = i + 1
loop
i = 0
li_Count_i = loo_JResp.SizeOfArray("deliverySpecifications.addressRestrictions.restrictions.IN.statesOrRegions")
do while i < li_Count_i
    loo_JResp.I = i
    ls_StrVal = loo_JResp.StringOf("deliverySpecifications.addressRestrictions.restrictions.IN.statesOrRegions[i]")
    i = i + 1
loop


destroy loo_Http
destroy loo_Json
destroy loo_PrivKey
destroy loo_SbResponseBody
destroy loo_JResp