Kathmandu Tezos protocol upgrade has introduced contract events, a new way to interact with smart contracts. This index allows indexing events using strictly typed payloads. From the developer's perspective, it's similar to the big_map index with a few differences.
An example below is artificial since no known contracts in mainnet are currently using events.
{{ #include ../../demos/demo-events/dipdup.yml:23:32 }}Unlike big maps, contracts may introduce new event tags and payloads at any time, so the index must be updated accordingly.
{{ #include ../../demos/demo-events/src/demo_events/handlers/on_move_event.py:7: }}Each contract can have a fallback handler called for all unknown events so you can process untyped data.
{{ #include ../../demos/demo-events/src/demo_events/handlers/on_other_event.py:6: }}