def nonce_from_proofs
import qasim-bend-kit@0.1.0.2/libs/AES256GCM.bend as AES256GCMimport Base
379def nonce_from_proofs(+bytes: List<&2, U32>,
380 size: Maybe<&0, {List.length(&2, U32, bytes) == 12n : Nat}>,
381 valid: Maybe<&0, {bytes_valid(bytes) == True{} : Bool}>) -> Result<&2, &2, Error, Nonce>:
382 match size valid:
383 case Some{size} Some{valid}: Done{Nonce{bytes, size, valid}}
384 case _ _: Fail{InvalidNonce{}}