let transaction

try {
  // Unmanaged Transaction
  transaction = await sequelize.transaction()
  
  // make sure to use the transaction in options
  await MyModel.create({ key: "some-value" }, { transaction })
  
  // always call commit at the end
  await transaction.commit()
} catch (err) {
  // always rollback 
  await transaction.rollback()
}

if (transaction.finished === 'commit') {
  // The transaction has been commit!
  // You can check for transaction status right here!
}