struct as mapping key

[StarkFishinator]

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[StarkFishinator]

Is this the correct function that I should use? @enitrat

[enitrat]

yes

[StarkFishinator]

It does not work as it expects a span, but span is only for arrays and key is not an array (it's a struct), so I guess we have to use another function

[enitrat]

your struct needs to derive Serde and then you can call Serde::<User>::serialize(key,serialized_struct) to make it an array (check corelib to see the correct syntax to use Serde

[enitrat]

Awesome! It works when deriving the Drop trait. Could you create a file with tests for the CI, as it's done in other examples?
Also, for the markdown file with explanations, you can structure it this way:

• Introduction (present a use case that validates this requirement - can you think of one in a context where it makes sense to hash fields together and use it as a key?)
• Motivation (why are we doing this? e.g. we can't use structs as mapping keys)
• Solution (serialize fields, hash them together, and use it as key)
• Example

This would be the perfect recipe for an easy-to-understand and meaningful example!