npm install node-go2ubl --save

const go2UBL = require('node-go2ubl');

go2UBL.initialize({
    identifier: 'Get these from go2UBL...',
    code: 'Get these from go2UBL...',
    token: 'Get these from go2UBL...',
});

// ... after initializing your library (see above) ...

await go2UBL.uploadDocument({
    type: 'purchase', // purchase, sale or logistic
    includeLines: true, // This is only valid for purchase documents
    externalId, // Your own tracking identity
    filename: 'document.pdf',
    chamberOfCommerceId: KVK,
    document: fs.readFileSync('document.pdf').toJSON().data
});

const update = async () => {
    const documentResponse = await go2UBL.getDocumentsWithChangedStatus();
    if (documentResponse.Success) {
        for (let document of documentResponse.Results) {
            const response = await go2UBL.getDocument(document.DocumentGuid);
            console.log(response.Result);
        }
    }

    const documentsStillToBeProcessed = await go2UBL.getDocumentsStillToBeProcessed();
    console.log(`${documentsStillToBeProcessed.Results.length} are waiting to be processed.`);
    const documentsStillToBeDelivered = await go2UBL.getDocumentsStillToBeDelivered();
    console.log(`${documentsStillToBeDelivered.Results.length} are being delivered.`);
    const processedDocuments = await go2UBL.getReadyDocuments();
    console.log(`${processedDocuments.Results.length} are ready.`);
    const declinedDocuments = await go2UBL.getFailedDocuments();
    console.log(`${declinedDocuments.Results.length} have failed.`);

    setTimeout(update, 5000);
}

setTimeout(update, 5000);

const chamberOfCommerce = '12345678';
console.log(await go2UBL.addCompany(chamberOfCommerce, [], '[email protected]'));
console.log(await go2UBL.disableCompany(chamberOfCommerce));
console.log(await go2UBL.enableCompany(chamberOfCommerce));
console.log(await go2UBL.addEmailToCompanyWhitelist(chamberOfCommerce, '[email protected]'));
console.log(await go2UBL.getCompany(chamberOfCommerce));
console.log(await go2UBL.deleteEmailFromCompanyWhitelist(chamberOfCommerce, '[email protected]'));