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Apply validation to the request parameters but no database validation at this point.
Maker-Checker Queue
A CHECKER can see a queue of any proposed changes that they didn't MAKE themselves. A CHECKER can select an item from their queue and see the proposed changes before accepting or rejecting them.
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Apply validation to the request parameters and also apply database validation (probably done by rolling back a valid transaction if it is a MAKER transaction). This ensures that only valid transactions are put on the Maker-Checker Queue (at time of creation)
Maker-Checker Queue
A CHECKER can see any proposed changes that they didn't MAKE themselves than they are allowed to CHECK. A CHECKER can select an item from their queue and see the proposed
changes before accepting or rejecting them. Notes may be attached to acceptance or rejection and the MAKER can see these.
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