What about a non fungible token, where you can transfer them in batches as large as you want. They are like fungible tokens, but each individual token has a sequence number. Very much like dollar bills.
Is there any practical use case for such interface?
Some idea: you transfer some tokens through a bridge. The equivalent is minted in the other side of the bridge, but using this interface. Each token will keep track of the exact tx where it was deposited, and could be treated differently.
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I have an idea about how to implement it, using self-balanced binary trees. I still don’t know if the implementation will be efficient enough to make transfers but I presume it will be.
