Zig Requires Chilkat v11.0.0+
Zig
Amazon Pay - Create Checkout Session
See more Amazon Pay Examples
Create a new Amazon Pay Checkout Session.Chilkat Zig Downloads
const std = @import("std");
const chilkat = @import("chilkat");
pub fn main(init: std.process.Init) !void {
const alloc = init.arena.allocator();
// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
const http = try chilkat.Http.init();
defer http.deinit();
// 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": {}
// }
// }
// }
// }
const json = try chilkat.JsonObject.init();
defer json.deinit();
json.updateString("webCheckoutDetails.checkoutReviewReturnUrl", "https://a.com/merchant-review-page") catch {};
// Make sure to use your storeId here:
json.updateString("storeId", "amzn1.application-oa2-client.8b5e45312b5248b69eeaStoreId") catch {};
var i: i32 = 0;
json.setI(i);
json.updateString("scopes[i]", "name") catch {};
i = i + 1;
json.setI(i);
json.updateString("scopes[i]", "email") catch {};
i = i + 1;
json.setI(i);
json.updateString("scopes[i]", "phoneNumber") catch {};
i = i + 1;
json.setI(i);
json.updateString("scopes[i]", "billingAddress") catch {};
json.updateString("deliverySpecifications.specialRestrictions[0]", "RestrictPOBoxes") catch {};
json.updateString("deliverySpecifications.addressRestrictions.type", "Allowed") catch {};
json.updateString("deliverySpecifications.addressRestrictions.restrictions.US.statesOrRegions[0]", "WA") catch {};
json.updateString("deliverySpecifications.addressRestrictions.restrictions.US.zipCodes[0]", "95050") catch {};
json.updateString("deliverySpecifications.addressRestrictions.restrictions.US.zipCodes[1]", "93405") catch {};
json.updateString("deliverySpecifications.addressRestrictions.restrictions.GB.zipCodes[0]", "72046") catch {};
json.updateString("deliverySpecifications.addressRestrictions.restrictions.GB.zipCodes[1]", "72047") catch {};
json.updateString("deliverySpecifications.addressRestrictions.restrictions.IN.statesOrRegions[0]", "AP") catch {};
json.updateNewObject("deliverySpecifications.addressRestrictions.restrictions.JP") catch {};
// 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.
const priv_key = try chilkat.PrivateKey.init();
defer priv_key.deinit();
priv_key.loadPemFile("C:/someDir/myAmazonPayPrivateKey.pem") catch {
std.debug.print("{s}\n", .{try priv_key.getLastErrorText(alloc)});
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
const public_key_id = "SANDBOX-AHEGSJCM3L2S637RBGABLAFW";
http.setAuthPrivateKey(public_key_id, priv_key) catch {
std.debug.print("{s}\n", .{try http.getLastErrorText(alloc)});
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
// x-amz-pay-idempotency-key
// Authorization
http.setAccept("application/json");
// To use the live system, replace "sandbox" with "live" in the URL passed to HttpJson.
// Also, make sure to use the correct region: pay-api.amazon.com, pay-api.amazon.eu, or pay-api.amazon.jp
const resp = try chilkat.HttpResponse.init();
defer resp.deinit();
http.httpJson("POST", "https://pay-api.amazon.eu/sandbox/v2/checkoutSessions/", json, "application/json", resp) catch {
std.debug.print("{s}\n", .{try http.getLastErrorText(alloc)});
return;
};
const sb_response_body = try chilkat.StringBuilder.init();
defer sb_response_body.deinit();
resp.getBodySb(sb_response_body) catch {};
const j_resp = try chilkat.JsonObject.init();
defer j_resp.deinit();
j_resp.loadSb(sb_response_body) catch {};
j_resp.setEmitCompact(false);
// If the status code is not equal to 201, this will display error information.
std.debug.print("Response Body:\n", .{});
std.debug.print("{s}\n", .{try j_resp.emit(alloc)});
const resp_status_code = resp.getStatusCode();
std.debug.print("Response Status Code = {d}\n", .{resp_status_code});
if (resp_status_code != 201) {
// 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."
// }
std.debug.print("Failed.\n", .{});
return;
}
// 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
var null_val: bool = false;
var constraint_id: [:0]const u8 = "";
var description: [:0]const u8 = "";
var str_val: [:0]const u8 = "";
_ = try j_resp.stringOf(alloc, "checkoutSessionId");
_ = try j_resp.stringOf(alloc, "webCheckoutDetails.checkoutReviewReturnUrl");
_ = try j_resp.stringOf(alloc, "webCheckoutDetails.checkoutResultReturnUrl");
_ = try j_resp.stringOf(alloc, "webCheckoutDetails.checkoutCancelUrl");
_ = try j_resp.stringOf(alloc, "webCheckoutDetails.amazonPayRedirectUrl");
_ = try j_resp.stringOf(alloc, "productType");
_ = try j_resp.stringOf(alloc, "chargePermissionType");
_ = try j_resp.stringOf(alloc, "recurringMetadata.frequency.unit");
_ = try j_resp.stringOf(alloc, "recurringMetadata.frequency.value");
_ = try j_resp.stringOf(alloc, "recurringMetadata.amount.amount");
_ = try j_resp.stringOf(alloc, "recurringMetadata.amount.currencyCode");
_ = try j_resp.stringOf(alloc, "paymentDetails.paymentIntent");
_ = j_resp.boolOf("paymentDetails.canHandlePendingAuthorization");
_ = try j_resp.stringOf(alloc, "paymentDetails.chargeAmount");
_ = try j_resp.stringOf(alloc, "paymentDetails.totalOrderAmount");
_ = try j_resp.stringOf(alloc, "paymentDetails.softDescriptor");
_ = try j_resp.stringOf(alloc, "paymentDetails.presentmentCurrency");
_ = try j_resp.stringOf(alloc, "paymentDetails.allowOvercharge");
_ = try j_resp.stringOf(alloc, "paymentDetails.extendExpiration");
_ = try j_resp.stringOf(alloc, "merchantMetadata.merchantReferenceId");
_ = try j_resp.stringOf(alloc, "merchantMetadata.merchantStoreName");
_ = try j_resp.stringOf(alloc, "merchantMetadata.noteToBuyer");
_ = try j_resp.stringOf(alloc, "merchantMetadata.customInformation");
_ = try j_resp.stringOf(alloc, "supplementaryData");
_ = try j_resp.stringOf(alloc, "buyer");
_ = try j_resp.stringOf(alloc, "billingAddress");
_ = try j_resp.stringOf(alloc, "statusDetails.state");
_ = try j_resp.stringOf(alloc, "statusDetails.reasonCode");
_ = try j_resp.stringOf(alloc, "statusDetails.reasonDescription");
_ = try j_resp.stringOf(alloc, "statusDetails.lastUpdatedTimestamp");
_ = try j_resp.stringOf(alloc, "shippingAddress");
_ = try j_resp.stringOf(alloc, "platformId");
_ = try j_resp.stringOf(alloc, "chargePermissionId");
_ = try j_resp.stringOf(alloc, "chargeId");
_ = try j_resp.stringOf(alloc, "creationTimestamp");
_ = try j_resp.stringOf(alloc, "expirationTimestamp");
_ = try j_resp.stringOf(alloc, "storeId");
_ = try j_resp.stringOf(alloc, "deliverySpecifications.addressRestrictions.type");
_ = try j_resp.stringOf(alloc, "providerMetadata.providerReferenceId");
_ = try j_resp.stringOf(alloc, "releaseEnvironment");
i = 0;
var count_i: i32 = j_resp.sizeOfArray("paymentPreferences");
while (i < count_i) {
j_resp.setI(i);
null_val = j_resp.isNullOf("paymentPreferences[i]");
i = i + 1;
}
i = 0;
count_i = j_resp.sizeOfArray("constraints");
while (i < count_i) {
j_resp.setI(i);
constraint_id = try j_resp.stringOf(alloc, "constraints[i].constraintId");
description = try j_resp.stringOf(alloc, "constraints[i].description");
i = i + 1;
}
i = 0;
count_i = j_resp.sizeOfArray("deliverySpecifications.specialRestrictions");
while (i < count_i) {
j_resp.setI(i);
str_val = try j_resp.stringOf(alloc, "deliverySpecifications.specialRestrictions[i]");
i = i + 1;
}
i = 0;
count_i = j_resp.sizeOfArray("deliverySpecifications.addressRestrictions.restrictions.US.statesOrRegions");
while (i < count_i) {
j_resp.setI(i);
str_val = try j_resp.stringOf(alloc, "deliverySpecifications.addressRestrictions.restrictions.US.statesOrRegions[i]");
i = i + 1;
}
i = 0;
count_i = j_resp.sizeOfArray("deliverySpecifications.addressRestrictions.restrictions.US.zipCodes");
while (i < count_i) {
j_resp.setI(i);
str_val = try j_resp.stringOf(alloc, "deliverySpecifications.addressRestrictions.restrictions.US.zipCodes[i]");
i = i + 1;
}
i = 0;
count_i = j_resp.sizeOfArray("deliverySpecifications.addressRestrictions.restrictions.GB.zipCodes");
while (i < count_i) {
j_resp.setI(i);
str_val = try j_resp.stringOf(alloc, "deliverySpecifications.addressRestrictions.restrictions.GB.zipCodes[i]");
i = i + 1;
}
i = 0;
count_i = j_resp.sizeOfArray("deliverySpecifications.addressRestrictions.restrictions.IN.statesOrRegions");
while (i < count_i) {
j_resp.setI(i);
str_val = try j_resp.stringOf(alloc, "deliverySpecifications.addressRestrictions.restrictions.IN.statesOrRegions[i]");
i = i + 1;
}
}