checking this outside requires an extra load (same for transfer_from)

[alexytsu]

    checking this outside requires an extra load (same for transfer_from)

alternatively this logic can be written in the predicate which means it will be checked for each token. this is not so bad if the predicate has the internally pre-loaded hamt available.

Originally posted by @alexytsu in https://github.com/helix-onchain/filecoin/pull/164#discussion_r1042841468