ket,
                key,
                valueBuf,
            ).then(() => {
                const bucketName = uuidString(bucket);
                dbg.info(`set value in bucket ${bucketName}`);
            }, err => {
                throw 'failed to set value: ' + err
            });
        }

        const dbg = (() => {
            const output = document.querySelector('#message-output');
            const className = {
                debug: 'has-text-grey',
                log: 'has-text-normal',
 