Chacha20poly1305.osplit_at: def of bend-collections-laws-crypto@1.0.0.0
Import: import bend-collections-laws-crypto@1.0.0.0/proofs/crypto/aead/chacha20poly1305.bend as Chacha20poly1305
Lines 246-247 of bend-collections-laws-crypto@1.0.0.0/proofs/crypto/aead/chacha20poly1305.bend: https://jend.leeeet.dev/read.txt?path=bend-collections-laws-crypto@1.0.0.0/proofs/crypto/aead/chacha20poly1305.bend&start_line=246&end_line=247

import Base
import bend-collections-laws-crypto@1.0.0.0/spec/crypto/chacha.bend as RC
import bend-collections-laws-crypto@1.0.0.0/spec/crypto/chacha20poly1305.bend as R

def osplit_at(+key: List<&2, U32>, +nonce: List<&2, U32>, +aad: List<&2, U32>, +d: List<&2, U32>, +n: Nat) -> Maybe<&2, List<&2, U32>>:
  R.open_split(key, nonce, aad, RC.prefix(n, d), RC.suffix(n, d))

Uses (7):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/spec/crypto/chacha20poly1305.bend&name=open_split
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/spec/crypto/chacha.bend&name=prefix
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/spec/crypto/chacha.bend&name=suffix