refactor: add error to store interface

[tac0turtle]

Description

return error on store interface instead of panic

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[aaronc]

Shouldn't we do something similar with iterator methods?

[tac0turtle]

Shouldn't we do something similar with iterator methods?

I added it, but then realized iterator has an Error() method that callers should check.

[aaronc]

Shouldn't we do something similar with iterator methods?

I added it, but then realized iterator has an Error() method that callers should check.

Is that done properly in SDK code?

[tac0turtle]

I don't think so, it seems we just assume

[aaronc]

I don't think so, it seems we just assume

So maybe better to add it to the interface methods directly?

[tac0turtle]

yea can make additions