(Go) Amazon Pay - Update Checkout Session

See more Amazon Pay Examples

Update the Checkout Session with transaction details.

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

Chilkat Go Downloads Go Package for Windows, MacOS, Linux, Alpine Linux, Solaris

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

    http := chilkat.NewHttp()
    var success bool

    // Implements the following CURL command:

    // curl "https://pay-api.amazon.com/:version/checkoutSessions/:checkoutSessionId" \
    // -X PATCH
    // -H "authorization:Px2e5oHhQZ88vVhc0DO%2FsShHj8MDDg%3DEXAMPLESIGNATURE"
    // -H "x-amz-pay-date:20201012T235046Z"
    // -d '{
    //     "webCheckoutDetails": {
    //         "checkoutResultReturnUrl": "https://a.com/merchant-confirm-page"
    //     },
    //     "paymentDetails": {
    //         "paymentIntent": "AuthorizeWithCapture",
    //         "canHandlePendingAuthorization":false,
    //         "softDescriptor": "Descriptor",
    //         "chargeAmount": {
    //             "amount": "1",
    //             "currencyCode": "USD"
    //         }
    //      },
    //     "merchantMetadata": {
    //         "merchantReferenceId": "Merchant reference ID",
    //         "merchantStoreName": "Merchant store name",
    //         "noteToBuyer": "Note to buyer",
    //         "customInformation": "Custom information"
    //     }
    // }'

    // 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": {
    //     "checkoutResultReturnUrl": "https://a.com/merchant-confirm-page"
    //   },
    //   "paymentDetails": {
    //     "paymentIntent": "AuthorizeWithCapture",
    //     "canHandlePendingAuthorization": false,
    //     "softDescriptor": "Descriptor",
    //     "chargeAmount": {
    //       "amount": "1",
    //       "currencyCode": "USD"
    //     }
    //   },
    //   "merchantMetadata": {
    //     "merchantReferenceId": "Merchant reference ID",
    //     "merchantStoreName": "Merchant store name",
    //     "noteToBuyer": "Note to buyer",
    //     "customInformation": "Custom information"
    //   }
    // }

    json := chilkat.NewJsonObject()
    json.UpdateString("webCheckoutDetails.checkoutResultReturnUrl","https://a.com/merchant-confirm-page")
    json.UpdateString("paymentDetails.paymentIntent","AuthorizeWithCapture")
    json.UpdateBool("paymentDetails.canHandlePendingAuthorization",false)
    json.UpdateString("paymentDetails.softDescriptor","Descriptor")
    json.UpdateString("paymentDetails.chargeAmount.amount","1")
    json.UpdateString("paymentDetails.chargeAmount.currencyCode","USD")
    json.UpdateString("merchantMetadata.merchantReferenceId","Merchant reference ID")
    json.UpdateString("merchantMetadata.merchantStoreName","Merchant store name")
    json.UpdateString("merchantMetadata.noteToBuyer","Note to buyer")
    json.UpdateString("merchantMetadata.customInformation","Custom information")

    sbRequestBody := chilkat.NewStringBuilder()
    json.EmitSb(sbRequestBody)

    // 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 := chilkat.NewPrivateKey()
    success = privKey.LoadPemFile("C:/someDir/myAmazonPayPrivateKey.pem")
    if success == false {
        fmt.Println(privKey.LastErrorText())
        http.DisposeHttp()
        json.DisposeJsonObject()
        sbRequestBody.DisposeStringBuilder()
        privKey.DisposePrivateKey()
        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
    publicKeyId := "SANDBOX-AHEGSJCM3L2S637RBGABLAFW"
    success = http.SetAuthPrivateKey(publicKeyId,privKey)
    if success == false {
        fmt.Println(http.LastErrorText())
        http.DisposeHttp()
        json.DisposeJsonObject()
        sbRequestBody.DisposeStringBuilder()
        privKey.DisposePrivateKey()
        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.SetAccept("application/json")

    success = http.SetUrlVar("sessionId","62b7d028-6c7c-4a43-b077-3897dff27c5b")
    // 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
    resp := http.PTextSb("PATCH","https://pay-api.amazon.eu/sandbox/v2/checkoutSessions/{$sessionId}",sbRequestBody,"utf-8","application/json",false,false)
    if http.LastMethodSuccess() == false {
        fmt.Println(http.LastErrorText())
        http.DisposeHttp()
        json.DisposeJsonObject()
        sbRequestBody.DisposeStringBuilder()
        privKey.DisposePrivateKey()
        return
    }

    sbResponseBody := chilkat.NewStringBuilder()
    resp.GetBodySb(sbResponseBody)
    jResp := chilkat.NewJsonObject()
    jResp.LoadSb(sbResponseBody)
    jResp.SetEmitCompact(false)

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

    respStatusCode := resp.StatusCode()
    fmt.Println("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'"
        // 	}

        fmt.Println("Failed.")
        resp.DisposeHttpResponse()
        http.DisposeHttp()
        json.DisposeJsonObject()
        sbRequestBody.DisposeStringBuilder()
        privKey.DisposePrivateKey()
        sbResponseBody.DisposeStringBuilder()
        jResp.DisposeJsonObject()
        return
    }

    resp.DisposeHttpResponse()

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

    // {
    //   "checkoutSessionId": "ada3f397-7d4b-4a55-abac-786685c02d8b",
    //   "webCheckoutDetails": {
    //     "checkoutReviewReturnUrl": "https://a.com/merchant-review-page",
    //     "checkoutResultReturnUrl": "https://a.com/merchant-confirm-page",
    //     "checkoutCancelUrl": null,
    //     "amazonPayRedirectUrl": "https://pay.amazon.com/redirect/checkoutId-1"
    //   },
    //   "productType": "PayAndShip",
    //   "paymentDetails": {
    //     "paymentIntent": "AuthorizeWithCapture",
    //     "canHandlePendingAuthorization": false,
    //     "chargeAmount": {
    //       "amount": "1",
    //       "currencyCode": "USD"
    //     },
    //     "totalOrderAmount": null,
    //     "softDescriptor": "Descriptor",
    //     "presentmentCurrency": "USD",
    //     "allowOvercharge": null,
    //     "extendExpiration": null
    //   },
    //   "merchantMetadata": {
    //     "merchantReferenceId": "Merchant reference ID",
    //     "merchantStoreName": "Merchant store name",
    //     "noteToBuyer": "Note to buyer",
    //     "customInformation": "Custom information"
    //   },
    //   "supplementaryData": null,
    //   "buyer": {
    //     "buyerId": "buyerId",
    //     "name": "name-1",
    //     "email": "name@amazon.com",
    //     "phoneNumber": "800-000-0000",
    //     "primeMembershipTypes": null
    //   },
    //   "billingAddress": {
    //     "name": "Work",
    //     "addressLine1": "440 Terry Ave",
    //     "addressLine2": "",
    //     "addressLine3": "",
    //     "city": "Seattle",
    //     "county": "King",
    //     "district": "Seattle",
    //     "stateOrRegion": "WA",
    //     "postalCode": "98121",
    //     "countryCode": "US"
    //   },
    //   "paymentPreferences": [
    //     {
    //       "paymentDescriptor": "Your selected Amazon payment method"
    //     }
    //   ],
    //   "statusDetails": {
    //     "state": "Open",
    //     "reasonCode": null,
    //     "reasonDescription": null,
    //     "lastUpdatedTimestamp": "20191015T195703Z"
    //   },
    //   "shippingAddress": {
    //     "name": "Susie Smith",
    //     "addressLine1": "10 Ditka Ave",
    //     "addressLine2": "Suite 2500",
    //     "addressLine3": null,
    //     "city": "Chicago",
    //     "county": null,
    //     "district": null,
    //     "stateOrRegion": "IL",
    //     "postalCode": "60602",
    //     "countryCode": "US",
    //     "phoneNumber": "800-000-0000"
    //   },
    //   "platformId": null,
    //   "chargePermissionId": null,
    //   "chargeId": null,
    //   "constraints": [
    //   ],
    //   "creationTimestamp": "20191015T195655Z",
    //   "expirationTimestamp": "20191016T195655Z",
    //   "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

    var paymentDescriptor *string = new(string)
    var strVal *string = new(string)

    checkoutSessionId := jResp.StringOf("checkoutSessionId")
    webCheckoutDetailsCheckoutReviewReturnUrl := jResp.StringOf("webCheckoutDetails.checkoutReviewReturnUrl")
    webCheckoutDetailsCheckoutResultReturnUrl := jResp.StringOf("webCheckoutDetails.checkoutResultReturnUrl")
    webCheckoutDetailsCheckoutCancelUrl := jResp.StringOf("webCheckoutDetails.checkoutCancelUrl")
    webCheckoutDetailsAmazonPayRedirectUrl := jResp.StringOf("webCheckoutDetails.amazonPayRedirectUrl")
    productType := jResp.StringOf("productType")
    paymentDetailsPaymentIntent := jResp.StringOf("paymentDetails.paymentIntent")
    paymentDetailsCanHandlePendingAuthorization := jResp.BoolOf("paymentDetails.canHandlePendingAuthorization")
    paymentDetailsChargeAmountAmount := jResp.StringOf("paymentDetails.chargeAmount.amount")
    paymentDetailsChargeAmountCurrencyCode := jResp.StringOf("paymentDetails.chargeAmount.currencyCode")
    paymentDetailsTotalOrderAmount := jResp.StringOf("paymentDetails.totalOrderAmount")
    paymentDetailsSoftDescriptor := jResp.StringOf("paymentDetails.softDescriptor")
    paymentDetailsPresentmentCurrency := jResp.StringOf("paymentDetails.presentmentCurrency")
    paymentDetailsAllowOvercharge := jResp.StringOf("paymentDetails.allowOvercharge")
    paymentDetailsExtendExpiration := jResp.StringOf("paymentDetails.extendExpiration")
    merchantMetadataMerchantReferenceId := jResp.StringOf("merchantMetadata.merchantReferenceId")
    merchantMetadataMerchantStoreName := jResp.StringOf("merchantMetadata.merchantStoreName")
    merchantMetadataNoteToBuyer := jResp.StringOf("merchantMetadata.noteToBuyer")
    merchantMetadataCustomInformation := jResp.StringOf("merchantMetadata.customInformation")
    supplementaryData := jResp.StringOf("supplementaryData")
    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")
    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")
    statusDetailsState := jResp.StringOf("statusDetails.state")
    statusDetailsReasonCode := jResp.StringOf("statusDetails.reasonCode")
    statusDetailsReasonDescription := jResp.StringOf("statusDetails.reasonDescription")
    statusDetailsLastUpdatedTimestamp := jResp.StringOf("statusDetails.lastUpdatedTimestamp")
    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")
    platformId := jResp.StringOf("platformId")
    chargePermissionId := jResp.StringOf("chargePermissionId")
    chargeId := jResp.StringOf("chargeId")
    creationTimestamp := jResp.StringOf("creationTimestamp")
    expirationTimestamp := jResp.StringOf("expirationTimestamp")
    storeId := jResp.StringOf("storeId")
    deliverySpecificationsAddressRestrictionsType := jResp.StringOf("deliverySpecifications.addressRestrictions.type")
    providerMetadataProviderReferenceId := jResp.StringOf("providerMetadata.providerReferenceId")
    releaseEnvironment := jResp.StringOf("releaseEnvironment")
    i := 0
    count_i := jResp.SizeOfArray("paymentPreferences")
    for i < count_i {
        jResp.SetI(i)
        paymentDescriptor = jResp.StringOf("paymentPreferences[i].paymentDescriptor")
        i = i + 1
    }

    i = 0
    count_i = jResp.SizeOfArray("constraints")
    for i < count_i {
        jResp.SetI(i)
        i = i + 1
    }

    i = 0
    count_i = jResp.SizeOfArray("deliverySpecifications.specialRestrictions")
    for i < count_i {
        jResp.SetI(i)
        strVal = jResp.StringOf("deliverySpecifications.specialRestrictions[i]")
        i = i + 1
    }

    i = 0
    count_i = jResp.SizeOfArray("deliverySpecifications.addressRestrictions.restrictions.US.statesOrRegions")
    for i < count_i {
        jResp.SetI(i)
        strVal = jResp.StringOf("deliverySpecifications.addressRestrictions.restrictions.US.statesOrRegions[i]")
        i = i + 1
    }

    i = 0
    count_i = jResp.SizeOfArray("deliverySpecifications.addressRestrictions.restrictions.US.zipCodes")
    for i < count_i {
        jResp.SetI(i)
        strVal = jResp.StringOf("deliverySpecifications.addressRestrictions.restrictions.US.zipCodes[i]")
        i = i + 1
    }

    i = 0
    count_i = jResp.SizeOfArray("deliverySpecifications.addressRestrictions.restrictions.GB.zipCodes")
    for i < count_i {
        jResp.SetI(i)
        strVal = jResp.StringOf("deliverySpecifications.addressRestrictions.restrictions.GB.zipCodes[i]")
        i = i + 1
    }

    i = 0
    count_i = jResp.SizeOfArray("deliverySpecifications.addressRestrictions.restrictions.IN.statesOrRegions")
    for i < count_i {
        jResp.SetI(i)
        strVal = jResp.StringOf("deliverySpecifications.addressRestrictions.restrictions.IN.statesOrRegions[i]")
        i = i + 1
    }


    http.DisposeHttp()
    json.DisposeJsonObject()
    sbRequestBody.DisposeStringBuilder()
    privKey.DisposePrivateKey()
    sbResponseBody.DisposeStringBuilder()
    jResp.DisposeJsonObject()