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Maybe a link short could do the job. But why is not possible? Because the space of the post itself on the blockchain or something? Maybe just code that if start with http and ends with a extension of an imagine, don't count the charaters, dunno

Link short is up to user currently. Space of the text data is on the blockchain. Would need checks for example. Best to keep simple. Especially when this needs to happen quick to be posted and readable in < 3 seconds.

Yeah, makes sense 😀