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Lua

Send ZATCA Invoice for Clearance

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Demonstrates how to send a ZATCA invoice for clearance, which is to send the HTTP POST with invoice hash and the signed invoice in base64 format.

Chilkat Lua Downloads

Lua
local chilkat = require("chilkat")

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

-- This example will send a POST with HTTP Basic Authentication to
-- https://gw-fatoora.zatca.sa/e-invoicing/simulation/invoices/clearance/single

-- NOTE: At the time of this writing, I don't know for sure if the above URL is correct.
--
-- The body of the POST will contain JSON formatted as such:

-- {
--   "summary": "Standard Invoice",
--   "value": {
--     "invoiceHash": "PEx8bNFcEMEpHzUVvQntQI6ot8eFqTT/l59b+H1HqX4=",
--     "uuid": "16e78469-64af-406d-9cfd-895e724198f0",
--     "invoice": "PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiPz4KPEl....."
--   }
-- }

-- The above JSON is created from the signed XML invoice, such as the following:

-- *** Look at the above base64 data for the invoiceHash and uuid.  These values are found in the invoice as shown below.
-- *** We'll write code to load the signed invoice into a Chilkat XML object, grab the invoice hash and the uuid,
-- *** and then construct the above JSON, which will then be sent in a POST.  (See below...)

-- <?xml version="1.0" encoding="UTF-8"?>
-- <Invoice xmlns="urn:oasis:names:specification:ubl:schema:xsd:Invoice-2" xmlns:cac="urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2" xmlns:cbc="urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2" xmlns:ext="urn:oasis:names:specification:ubl:schema:xsd:CommonExtensionComponents-2"><ext:UBLExtensions>
--     <ext:UBLExtension>
--         <ext:ExtensionURI>urn:oasis:names:specification:ubl:dsig:enveloped:xades</ext:ExtensionURI>
--         <ext:ExtensionContent>
--             <!-- Please note that the signature values are sample values only -->
--             <sig:UBLDocumentSignatures xmlns:sig="urn:oasis:names:specification:ubl:schema:xsd:CommonSignatureComponents-2" xmlns:sac="urn:oasis:names:specification:ubl:schema:xsd:SignatureAggregateComponents-2" xmlns:sbc="urn:oasis:names:specification:ubl:schema:xsd:SignatureBasicComponents-2">
--                 <sac:SignatureInformation>
--                     <cbc:ID>urn:oasis:names:specification:ubl:signature:1</cbc:ID>
--                     <sbc:ReferencedSignatureID>urn:oasis:names:specification:ubl:signature:Invoice</sbc:ReferencedSignatureID>
--                     <ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#" Id="signature">
--                         <ds:SignedInfo>
--                             <ds:CanonicalizationMethod Algorithm="http://www.w3.org/2006/12/xml-c14n11"/>
--                             <ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha256"/>
--                             <ds:Reference Id="invoiceSignedData" URI="">
--                                 <ds:Transforms>
--                                     <ds:Transform Algorithm="http://www.w3.org/TR/1999/REC-xpath-19991116">
--                                         <ds:XPath>not(//ancestor-or-self::ext:UBLExtensions)</ds:XPath>
--                                     </ds:Transform>
--                                     <ds:Transform Algorithm="http://www.w3.org/TR/1999/REC-xpath-19991116">
--                                         <ds:XPath>not(//ancestor-or-self::cac:Signature)</ds:XPath>
--                                     </ds:Transform>
--                                     <ds:Transform Algorithm="http://www.w3.org/TR/1999/REC-xpath-19991116">
--                                         <ds:XPath>not(//ancestor-or-self::cac:AdditionalDocumentReference[cbc:ID='QR'])</ds:XPath>
--                                     </ds:Transform>
--                                     <ds:Transform Algorithm="http://www.w3.org/2006/12/xml-c14n11"/>
--                                 </ds:Transforms>
--                                 <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
--                                 <ds:DigestValue>PEx8bNFcEMEpHzUVvQntQI6ot8eFqTT/l59b+H1HqX4=</ds:DigestValue>
--                             </ds:Reference>
--                             <ds:Reference Type="http://www.w3.org/2000/09/xmldsig#SignatureProperties" URI="#xadesSignedProperties">
--                                 <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
--                                 <ds:DigestValue>ZDEyMDUyODJjYzk4MGViNTJhNmYzMGIyZTgxODhkY2JlOWEzNmRiMTFlZTVhMDAxNjk5OTRkYTg3ODhlY2ZiMw==</ds:DigestValue>
--                             </ds:Reference>
--                         </ds:SignedInfo>
-- ...
-- ...
-- ...
--         </ext:ExtensionContent>
--     </ext:UBLExtension>
-- </ext:UBLExtensions>
--
--     <cbc:ProfileID>reporting:1.0</cbc:ProfileID>
--     <cbc:ID>SME00062</cbc:ID>
--     <cbc:UUID>16e78469-64af-406d-9cfd-895e724198f0</cbc:UUID>
--     <cbc:IssueDate>2022-03-13</cbc:IssueDate>
--     <cbc:IssueTime>14:40:40</cbc:IssueTime>
--     <cbc:InvoiceTypeCode name="0111010">388</cbc:InvoiceTypeCode>
-- ...
-- ...
-- ...
--     </cac:InvoiceLine>
-- </Invoice>

-- -------------------------------------------------------------------
-- First, let's load our signed XML into a Chilkat XML object so we can get the uuid and invoice hash.
local signedXmlFilePath = "qa_data/zatca/http_post_clearance/sample_signed_invoice.xml"

local signedXml = chilkat.Xml.new()
local success = signedXml:load_xml_file(signedXmlFilePath)
if not success then
    print(signedXml.last_error_text)
    return
end

local invoiceHash = signedXml:get_child_content("ext:UBLExtensions|ext:UBLExtension|ext:ExtensionContent|sig:UBLDocumentSignatures|sac:SignatureInformation|ds:Signature|ds:SignedInfo|ds:Reference[0]|ds:DigestValue")
print("invoiceHash: " .. invoiceHash)

local cbc_UUID = signedXml:get_child_content("cbc:UUID")
print("UUID: " .. cbc_UUID)

-- The Chilkat XML object was used purely for getting the above 2 values.
-- We must send the EXACT signed XML in base64 format.  Therefore, we should load the signed XML into a Chilkat BinData and get it in base64 single-line format.

local bd = chilkat.BinData.new()
success = bd:load_file(signedXmlFilePath)
local base64Invoice = bd:get_encoded("base64")

-- OK, let's build the JSON that will be in the HTTP POST body.
local json = chilkat.JsonObject.new()
json:update_string("summary", "Standard Invoice")
json:update_string("value.invoiceHash", invoiceHash)
json:update_string("value.uuid", cbc_UUID)
json:update_string("value.invoice", base64Invoice)

-- Now create the HTTP object and send the POST.
local http = chilkat.Http.new()

-- We'll want HTTP basic authentication.
http.basic_auth = true
http.login = "your login"
http.password = "your password"

local resp = chilkat.HttpResponse.new()
success = http:http_json("POST", "https://gw-fatoora.zatca.sa/e-invoicing/simulation/invoices/clearance/single", json, "application/json", resp)
if not success then
    print(http.last_error_text)
    return
end

-- Check the response status code.  A 200 or 202 indicates success..
local statusCode = resp.status_code
print("Response status code = " .. statusCode)

-- Examine the response, which is JSON.
local jsonResp = chilkat.JsonObject.new()
resp:get_body_json(jsonResp)
jsonResp.emit_compact = false
print("JSON Response:")
print(jsonResp:emit())

-- Use this online tool to generate parsing code from sample JSON:
-- Generate Parsing Code from JSON