def xnonce
import bend-collections@1.0.0.0/src/crypto/aead/chacha20poly1305.bend as Chacha20poly1305import Base
import bend-collections@1.0.0.0/src/crypto/chacha/chacha20.bend as CH
74def xnonce(nonce: List<&2, U32>) -> List<&2, U32>:
75 0 <> 0 <> 0 <> 0 <> CH.skip(16n, nonce)