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Unless there are reasons for keeping the "check for unintended consequences" and "perform the action" in the same endpoint, I would split them into two parts: GET /api/v1/action-can-charge-the...
Answer
#1: Initial revision
by
Alexei
·
2022-01-13T15:08:17Z (almost 3 years ago)
Unless there are reasons for keeping the "check for unintended consequences" and "perform the action" in the same endpoint, I would split them into two parts:
1. `GET /api/v1/action-can-charge-the-client/{id}`. This should respond with 200 and the required information so that the client knows that confirmation is required.
1. `POST /api/v1/perform-action-that-might-charge-the-client/{id}`. This should actually perform the action, including charging the client. If the client waits (synchronously) for the OK, I would return a 200. If the client just starts the action (synchronously), I would return a 202.
This solution splits two rather different concerns (is it going to cost me? vs. do the thing even if it charges me) and also provides a "query"/"command" separation.
I am not sure about the performance and security though. Typically separating "queries" from "commands" helps with scalability and maintenance.
If for whatever reason, the client must explicitly acknowledge that a payment might occur when calling `perform-action-that-might-charge-the-client`, an "AcceptThatChargeMightHappen" boolean can be included in the payload (default value false).