Callback type

What's the difference between:

in RCTComponent.h :

 RCTDirectEventBlock RCTBubblingEventBlock 

AND

in RCTBridgeModule.h :

 RCTResponseSenderBlock RCTResponseErrorBlock RCTPromiseResolveBlock RCTPromiseRejectBlock 

Basically, what do I need to consider when I select the correct callback, do I want to return to JavaScript ?

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