tracer.trace('web.request', () => {
  // some code
})

const childOf = tracer.scope().active()
const span = tracer.startSpan('test', { childOf })

try {
  tracer.scope().activate(span, () => {
    // some code
  })
} catch (e) {
  span.addTags({
    'error.type': e.name,
    'error.msg': e.message,
    'error.stack': e.stack,
  })

  throw e
} finally {
  span.finish()
}

const fn = tracer.wrap('web.request', () => {
  // some code
})

const childOf = tracer.scope().active()
const span = tracer.startSpan('test', { childOf })

const fn = tracer.scope().bind(() => {
  try {
    // some code
  } catch (e) {
    span.addTags({
      'error.type': e.name,
      'error.msg': e.message,
      'error.stack': e.stack,
    })

    throw e
  } finally {
    span.finish()
  }
}, span)

const fn = tracer.wrap('web.request', () => {
  return new Promise((resolve, reject) => {
    // some code
  })
})

const childOf = tracer.scope().active()
const span = tracer.startSpan('test', { childOf })

const fn = tracer.scope().bind(() => {
  const promise = new Promise((resolve, reject) => {
    // some code
  })

  promise
    .then(() => span.finish()
    .catch(err => {
      span.addTags({
        'error.type': err.name,
        'error.msg': err.message,
        'error.stack': err.stack,
      })
      span.finish()
    })

  return promise
}, span)