How to abort saving a Laravel model instance?

Question

Laravel

The situation is the following. I deal with money transactions. If the server has not responded to the payment system's request, it repeats it.
Each transaction is recorded in the database.

Now I want to make sure that transactions are not re-recorded if the server gives an incorrect answer.

To do this, I take the Id that comes with the transaction and write it down in the corresponding field of the table.

Essence of the question. To check if a transaction with the same Id has already been created, I listen to the creating event. How can I interrupt the creation of a record from an event? Just delete the created object? I did not find such a method in the documentation, but, most likely, I just searched badly ...

Answer 1

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Answer 2

https://laravel.com/docs/8.x/database#database-tra...

Answer 3

At the database level, add a unique constraint to the Id field. Additionally, at the code level, before creating a transaction, check through the sql query exist.