[erlang-questions] simulate a transaction

[Brisa Jiménez]

    I want to simulate a transaction.
    I want to know when a riak operation happens.
    I know that riak isn't a relational database, but it is important for
me in
    particular cases to undo operations when something goes wrong.
    I'm reading about how to use dbg library to trace functions, I hope
that it
    will be useful to use inside a module.
    If any have suggestions about I want to do, I will be very grateful.
    Regards.
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