Chacha20poly1305.seal: def of bend-collections@1.0.0.0
Import: import bend-collections@1.0.0.0/src/crypto/aead/chacha20poly1305.bend as Chacha20poly1305
Lines 45-48 of bend-collections@1.0.0.0/src/crypto/aead/chacha20poly1305.bend: https://jend.leeeet.dev/read.txt?path=bend-collections@1.0.0.0/src/crypto/aead/chacha20poly1305.bend&start_line=45&end_line=48

import Base

# ciphertext || tag, without length checks.
def seal(+key: List<&2, U32>, +nonce: List<&2, U32>, +aad: List<&2, U32>, +pt: List<&2, U32>) -> List<&2, U32>:
  +ct = encrypt_ct(key, nonce, pt)
  List.append(&2, U32, ct, tag(key, nonce, aad, ct))

Uses (5):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List.append
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/crypto/aead/chacha20poly1305.bend&name=encrypt_ct
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/crypto/aead/chacha20poly1305.bend&name=tag