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nlordell avatar nlordell commented on August 21, 2024

Indexed log fields that are larger than 32 bytes (like a dynamic byte array) don't actually encode themselves in the log data at all (only their hash as an indexed field). If you want to index it AND have the data, you need to include it twice (once indexed and once not).

from ethcontract-rs.

josojo avatar josojo commented on August 21, 2024

You can add the attribute indexed to up to three parameters which adds them to a special data structure known as β€œtopics” instead of the data part of the log. A topic can only hold a single word (32 bytes) so if you use a reference type for an indexed argument, the Keccak-256 hash of the value is stored as a topic instead.

https://docs.soliditylang.org/en/latest/contracts.html#events

Nick is right! Ups, we have to redeploy

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