Signing document SigningServiceImpl

Signing process
1

Dear ZATCA Team,

I am using the ZATCA SDK (zatca-einvoicing-sdk-Java-238-R3.3.9) and the SigningServiceImpl service to generate the signed XML document. I am trying to validate the same generated document on the ZATCA Sandbox, but I am encountering the following errors when validating a simplified invoice:

Errors:

  • Category: SIGNATURE_ERROR
    Code: invoiceSignedDataDigestValue
    Message: Incorrect invoice hashing.
  • Category: SIGNATURE_ERROR
    Code: signatureValue
    Message: Incorrect signature value.
  • Category: QR_CODE_ERROR
    Code: hashedXml
    Message: The hashedXml does not match with the QR code’s hashedXml, or the hashedXml is missing.

Additionally, when I change the cbc:InvoiceTypeCode value to 0100000, the signed XML generates the following warning:

Warning:

  • Category: BR_KSA_WARNING
    Code: BR-KSA-15
    Message: The tax invoice (invoice type code (BT-30) = 388) and invoice code (KSA-2) must contain ‘01’ as the first two digits on the date of supply (KSA-5).

My question is: Why am I receiving these errors when using the SDK to generate the signed document? If I change the invoice type code to a standard invoice (0100000), it gets validated on the ZATCA site without issues.

Thank you for your assistance.