(async()=>{

    console.clear();

    async function fetchRetry(url, options, n) {
        // based on <https://dev.to/ycmjason/javascript-fetch-retry-upon-failure-3p6g>
        try {
            const response = await fetch(url, options);
            if (response.status !== 200) {
                throw `Non 200 response ($response.status)`;
            }
            return response;
        } catch (err) {
            if (n === 1) {
                throw err;
            }
            return await fetchRetry(url, options, n - 1);
        }
    }

    async function callEndPoint(action, data) {
        const endpoint = '/app/recordscatalog/rcendpoint.nl';

        const dataEncoded = encodeURI(JSON.stringify(data));
        const response = await fetchRetry(`${endpoint}?action=${action}&data=${dataEncoded}'`, undefined, 3);
        const responseJson = await response.json();
        return responseJson.data;
    }

    // Get all tables

    const recordTypes = (await callEndPoint('getRecordTypes', {
        structureType: "FLAT"
    }));

    console.log(recordTypes);

    // Get fields from a table

    const getRecordTypeDetail= await callEndPoint('getRecordTypeDetail', {
        scriptId: 'transaction',
        detailType: "SS_ANAL"
    });

    console.log(getRecordTypeDetail);

}
)().then(()=>null).catch(error=>console.error(error));