private EncryptedTurnover EncryptTurnover()
{
var sum = TaxData.Sum();
var counter = (Turnover.Value + sum) * 100;
var registryReceiptId = RegisterIdentifier.Value + Number.Value;
var initializationVectorBytes = Encoding.UTF8.GetBytes(registryReceiptId);
var registryReceiptIdHash = Sha256(initializationVectorBytes);
var encryptedValue = AesCtr(registryReceiptIdHash, (long)counter, Key);
return(new EncryptedTurnover(encryptedValue));
}
public Receipt(
ReceiptNumber number,
RegisterIdentifier registerIdentifier,
TaxData taxData,
CurrencyValue turnover,
CertificateSerialNumber certificateSerialNumber,
JwsRepresentation previousJwsRepresentation,
byte[] key,
LocalDateTime created = null)
{
Number = number ?? throw new ArgumentException("The receipt number has to be specified.");
RegisterIdentifier = registerIdentifier ?? throw new ArgumentException("The register identifier has to be specified.");
TaxData = taxData ?? throw new ArgumentException("The tax data have to be specified.");
Turnover = turnover ?? throw new ArgumentException("The turnover has to be specified.");
CertificateSerialNumber = certificateSerialNumber ?? throw new ArgumentException("The certificate serial number has to be specified.");
PreviousJwsRepresentation = previousJwsRepresentation;
Created = created ?? LocalDateTime.Now;
Suite = "R1-AT1";
Key = key;
ChainValue = ComputeChainValue();
EncryptedTurnover = EncryptTurnover();
}