(Lianja) Amazon Pay - Complete Checkout Session

See more Amazon Pay Examples

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

For more information, see https://developer.amazon.com/docs/amazon-pay-api-v2/checkout-session.html#complete-checkout-session

Chilkat Lianja Extension Download Chilkat Lianja Extension

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

loHttp = createobject("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"
//   }
// }

loJson = createobject("CkJsonObject")
loJson.UpdateString("chargeAmount.amount","14.00")
loJson.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.
loPrivKey = createobject("CkPrivateKey")
llSuccess = loPrivKey.LoadPemFile("C:/someDir/myAmazonPayPrivateKey.pem")
if (llSuccess = .F.) then
    ? loPrivKey.LastErrorText
    release loHttp
    release loJson
    release loPrivKey
    return
endif

// 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
lcPublicKeyId = "SANDBOX-AHEGSJCM3L2S637RBGABLAFW"
llSuccess = loHttp.SetAuthPrivateKey(lcPublicKeyId,loPrivKey)
if (llSuccess = .F.) then
    ? loHttp.LastErrorText
    release loHttp
    release loJson
    release loPrivKey
    return
endif

// 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

loHttp.Accept = "application/json"

// To use the live system, replace "sandbox" with "live" in the URL passed to PTextSb.
// Also, make sure to use the correct region: pay-api.amazon.com, pay-api.amazon.eu, or pay-api.amazon.jp
llSuccess = loHttp.SetUrlVar("sessionId","62b7d028-6c7c-4a43-b077-3897dff27c5b")
loResp = loHttp.PostJson3("https://pay-api.amazon.eu/sandbox/v2/checkoutSessions/{$sessionId}/complete","application/json",loJson)
if (loHttp.LastMethodSuccess = .F.) then
    ? loHttp.LastErrorText
    release loHttp
    release loJson
    release loPrivKey
    return
endif

loSbResponseBody = createobject("CkStringBuilder")
loResp.GetBodySb(loSbResponseBody)
loJResp = createobject("CkJsonObject")
loJResp.LoadSb(loSbResponseBody)
loJResp.EmitCompact = .F.

// If the status code is not equal to 200, this will display error information.
? "Response Body:"
? loJResp.Emit()

lnRespStatusCode = loResp.StatusCode
? "Response Status Code = " + str(lnRespStatusCode)
if (lnRespStatusCode <> 200) then

    // 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"
    // 	}

    ? "Failed."
    release loResp
    release loHttp
    release loJson
    release loPrivKey
    release loSbResponseBody
    release loJResp
    return
endif

release loResp

// 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

lcCheckoutSessionId = loJResp.StringOf("checkoutSessionId")
lcWebCheckoutDetails = loJResp.StringOf("webCheckoutDetails")
lcChargePermissionType = loJResp.StringOf("chargePermissionType")
lcRecurringMetadata = loJResp.StringOf("recurringMetadata")
lcProductType = loJResp.StringOf("productType")
lcPaymentDetails = loJResp.StringOf("paymentDetails")
lcMerchantMetadata = loJResp.StringOf("merchantMetadata")
lcSupplementaryData = loJResp.StringOf("supplementaryData")
lcBuyer = loJResp.StringOf("buyer")
lcBillingAddress = loJResp.StringOf("billingAddress")
lcStatusDetailsState = loJResp.StringOf("statusDetails.state")
lcStatusDetailsReasonCode = loJResp.StringOf("statusDetails.reasonCode")
lcStatusDetailsReasonDescription = loJResp.StringOf("statusDetails.reasonDescription")
lcStatusDetailsLastUpdatedTimestamp = loJResp.StringOf("statusDetails.lastUpdatedTimestamp")
lcShippingAddress = loJResp.StringOf("shippingAddress")
lcPlatformId = loJResp.StringOf("platformId")
lcChargePermissionId = loJResp.StringOf("chargePermissionId")
lcChargeId = loJResp.StringOf("chargeId")
lcCreationTimestamp = loJResp.StringOf("creationTimestamp")
lcExpirationTimestamp = loJResp.StringOf("expirationTimestamp")
lcStoreId = loJResp.StringOf("storeId")
lcDeliverySpecifications = loJResp.StringOf("deliverySpecifications")
lcProviderMetadata = loJResp.StringOf("providerMetadata")
lcReleaseEnvironment = loJResp.StringOf("releaseEnvironment")
i = 0
lnCount_i = loJResp.SizeOfArray("paymentPreferences")
do while i < lnCount_i
    loJResp.I = i
    llNullVal = loJResp.IsNullOf("paymentPreferences[i]")
    i = i + 1
enddo
i = 0
lnCount_i = loJResp.SizeOfArray("constraints")
do while i < lnCount_i
    loJResp.I = i
    llNullVal = loJResp.IsNullOf("constraints[i]")
    i = i + 1
enddo


release loHttp
release loJson
release loPrivKey
release loSbResponseBody
release loJResp