How to raise or emit an event?

Question

In Solidity there's emit keyword for raising an event. How to do it in Tezos in a smart contract?

Namely, a) define b) emit an event

?

Answer 1

Events will be introduced in the Kathmandu upgrade. See this blog post from Marigold for details:

https://www.marigold.dev/post/how-to-send-events-from-contract-fast

Answer 2

There is currently no standard way to do this but a possible pattern to simulate this is to call a specific contract doing nothing with its parameter; the call to this sink contract is the event.