Delphi DLL
Create SOAP with multiple VeriFactu Digitally Signed Registration Records

Creates a SOAP message containing a multiple digitally signed invoice registration records, formatted according to the specifications for Spain's Veri*Factu system.
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Delphi DLL
uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, StringBuilder, Xml;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
xml: HCkXml;
sbXml: HCkStringBuilder;
sbSignedSoap: HCkStringBuilder;

begin
success := False;

success := True;

// Begin with the following SOAP XML:

// <?xml version="1.0" encoding="utf-8"?>
// <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:sum="https://www2.agenciatributaria.gob.es/static_files/common/internet/dep/aplicaciones/es/aeat/tike/cont/ws/SuministroLR.xsd" xmlns:sum1="https://www2.agenciatributaria.gob.es/static_files/common/internet/dep/aplicaciones/es/aeat/tike/cont/ws/SuministroInformacion.xsd" xmlns:xd="http://www.w3.org/2000/09/xmldsig#">
//     <soapenv:Header/>
//     <soapenv:Body>
//         <sum:RegFactuSistemaFacturacion>
//             <sum:Cabecera>
//                 <sum1:ObligadoEmision>
//                     <sum1:NombreRazon>XYZ STORE SL</sum1:NombreRazon>
//                     <sum1:NIF>B99999999</sum1:NIF>
//                 </sum1:ObligadoEmision>
//                 <sum1:RemisionRequerimiento>
//                     <sum1:RefRequerimiento>3333333333</sum1:RefRequerimiento>
//                     <sum1:FinRequerimiento>S</sum1:FinRequerimiento>
//                 </sum1:RemisionRequerimiento>
//             </sum:Cabecera>
// 
//         </sum:RegFactuSistemaFacturacion>
//     </soapenv:Body>
// </soapenv:Envelope>

xml := CkXml_Create();
CkXml_putTag(xml,'soapenv:Envelope');
CkXml_AddAttribute(xml,'xmlns:soapenv','http://schemas.xmlsoap.org/soap/envelope/');
CkXml_AddAttribute(xml,'xmlns:sum','https://www2.agenciatributaria.gob.es/static_files/common/internet/dep/aplicaciones/es/aeat/tike/cont/ws/SuministroLR.xsd');
CkXml_AddAttribute(xml,'xmlns:sum1','https://www2.agenciatributaria.gob.es/static_files/common/internet/dep/aplicaciones/es/aeat/tike/cont/ws/SuministroInformacion.xsd');
CkXml_AddAttribute(xml,'xmlns:xd','http://www.w3.org/2000/09/xmldsig#');
CkXml_UpdateChildContent(xml,'soapenv:Header','');
CkXml_UpdateChildContent(xml,'soapenv:Body|sum:RegFactuSistemaFacturacion|sum:Cabecera|sum1:ObligadoEmision|sum1:NombreRazon','XYZ STORE SL');
CkXml_UpdateChildContent(xml,'soapenv:Body|sum:RegFactuSistemaFacturacion|sum:Cabecera|sum1:ObligadoEmision|sum1:NIF','B99999999');
CkXml_UpdateChildContent(xml,'soapenv:Body|sum:RegFactuSistemaFacturacion|sum:Cabecera|sum1:RemisionRequerimiento|sum1:RefRequerimiento','3333333333');
CkXml_UpdateChildContent(xml,'soapenv:Body|sum:RegFactuSistemaFacturacion|sum:Cabecera|sum1:RemisionRequerimiento|sum1:FinRequerimiento','S');

// Prior to this code, we created N signed SOAP messages, each containing a single signed record.
// Load each of these signed SOAP messages into a StringBuilder and insert after the "</sum:Cabecera>"
// Note: We must NOT use Chilkat.Xml for this.  We must do string operations using Chilkat StringBuilder to prevent whitespace or formatting modifications which would break the signatures.

sbXml := CkStringBuilder_Create();
CkXml_GetXmlSb(xml,sbXml);

// ---------------------------------------------------------------------------------------------
// Load the previously signed XML containing just one signed record.
sbSignedSoap := CkStringBuilder_Create();
success := CkStringBuilder_LoadFile(sbSignedSoap,'c:/temp/qa_output/signedSoapXml1.xml','utf-8');
if (success = False) then
  begin
    Memo1.Lines.Add(CkStringBuilder__lastErrorText(sbSignedSoap));
    Exit;
  end;

// Remove everything before "</sum:Cabecera>", including the "</sum:Cabecera>"
CkStringBuilder_RemoveBefore(sbSignedSoap,'</sum:Cabecera>');

// Remove everything after the "</sum:RegFactuSistemaFacturacion>", including the "</sum:RegFactuSistemaFacturacion>"
CkStringBuilder_RemoveAfterFinal(sbSignedSoap,'</sum:RegFactuSistemaFacturacion>');

// We now have the portion of the signed SOAP xml from <sum:RegistroFactura> to </sum:RegistroFactura>
// Insert it after the </sum:Cabecera>
CkStringBuilder_Prepend(sbSignedSoap,'</sum:Cabecera>');
CkStringBuilder_ReplaceFirst(sbXml,'</sum:Cabecera>',CkStringBuilder__getAsString(sbSignedSoap));

// ---------------------------------------------------------------------------------------------
// Add the next signed SOAP containing a single signed record.
success := CkStringBuilder_LoadFile(sbSignedSoap,'c:/temp/qa_output/signedSoapXml2.xml','utf-8');
if (success = False) then
  begin
    Memo1.Lines.Add(CkStringBuilder__lastErrorText(sbSignedSoap));
    Exit;
  end;

// Remove everything before "</sum:Cabecera>", including the "</sum:Cabecera>"
CkStringBuilder_RemoveBefore(sbSignedSoap,'</sum:Cabecera>');

// Remove everything after the "</sum:RegFactuSistemaFacturacion>", including the "</sum:RegFactuSistemaFacturacion>"
CkStringBuilder_RemoveAfterFinal(sbSignedSoap,'</sum:RegFactuSistemaFacturacion>');

// We now have the portion of the signed SOAP xml from <sum:RegistroFactura> to </sum:RegistroFactura>
// Insert it after the </sum:Cabecera>
CkStringBuilder_Prepend(sbSignedSoap,'</sum:Cabecera>');
CkStringBuilder_ReplaceFirst(sbXml,'</sum:Cabecera>',CkStringBuilder__getAsString(sbSignedSoap));

// ---------------------------------------------------------------------------------------------
// Continue adding more signed records if needed.

// Save the SOAP containing multiple signed records..
CkStringBuilder_WriteFile(sbXml,'c:/temp/qa_output/soap_combined.xml','utf-8',False);

CkXml_Dispose(xml);
CkStringBuilder_Dispose(sbXml);
CkStringBuilder_Dispose(sbSignedSoap);

end;