async function bracket(acquire, release, process) { const resources = await acquire() try { return process(resources) } finally { release(resources) } } bracket( async () => Promise.resolve({conn: 'A database connection'}) , async ({conn}) => { console.info('Cleanup conn: ', conn); return Promise.resolve() } , async ({conn}) => { console.info('Process conn: ', conn); return 'result of process' } ) .then(r => console.log('result =', r)) .catch(e => console.error('error =', e))