EET stands for Elektronická Evidence Tržeb, which is Czech version of Fiscal Printers. It's an online API provided by the Ministry of Finance in a form of a SOAP Web Service.

• No Czech abbreviations.
• Early data validation.
• Intuitive immutable DTOs.
• SOAP communication (including WS-Security signing).
• PKP and BKP security code computation.

• As the communication is done fully via HTTPS, we postponed the implementation of response signature verification. It's a potential security risk that will be addressed in upcoming releases.

We tend to use immutable DTOs wherever possible, especially to ensure data validity. We want the library to throw an error as soon as possible, i.e. when constructing corresponding data structures. That is why we even introduce wrappers for simple datatypes. Various usages are demonstrated in our test cases.

var certificate = new Certificate(
    password: "certificatePassword",
    data: certificateContentsByteArray
);

var record = new RevenueRecord(
    identification: new Identification(
        taxPayerIdentifier: new TaxIdentifier("CZ1234567890"),
        registryIdentifier: new RegistryIdentifier("01"),
        premisesIdentifier: new PremisesIdentifier(1),
        certificate: certificate
    ),
    revenue: new Revenue(
        gross: new CurrencyValue(1234.00m)
    ),
    billNumber: new BillNumber("2016-321")
);

var client = new EetClient(certificate);
var response = await client.SendRevenue(record);
if (response.IsSuccess)
{
    var fiscalCode = response.Success.FiscalCode;
}

Test are not currently running on Travis CI, as their network infrastructure is blocking HTTPS traffic directed into Europe, where the EET servers are located.

Otherwise, a xUnit test suite is a part of the library, it contains end-to-end tests that communicates with Playground EET servers to verify the lib is really working against the current EET version.

Currently, a NuGet package can be generated by running the following command:

src\Mews.Eet> nuget pack .\Mews.Eet.csproj -IncludeReferencedProjects

It will be published to NuGet once we fully verify its functionality.

Development: @jirihelmich

Code review: @siroky, @onashackem

• @tomasdeml: PR#3

The time to implement this was kindly provided by Mews Systems.

• https://github.com/todvora/eet-client: Java, MIT