react-native-firebase/docs/modules/transactions.md

Transactions

Transactions are currently an experimental feature as they can not be integrated as easily as the other Firebase features. Please see the Firebase documentation for full implemtation details.

Example

const ref = firebase.database().ref('user/posts');

ref.transaction((posts) => {
  return (posts || 0) + 1;
}, (error, committed, snapshot) => {
  if (error) {
    console.log('Something went wrong', error);
  } else if (!committed) {
    console.log('Aborted'); // Returning undefined will trigger this
  } else {
    console.log('User posts incremented by 1');
  }

  console.log('User posts is now: ', snapshot.val());
});