Chacha20.block_rounds: def of bend-collections@1.0.0.0
Import: import bend-collections@1.0.0.0/src/crypto/chacha/chacha20.bend as Chacha20
Lines 94-100 of bend-collections@1.0.0.0/src/crypto/chacha/chacha20.bend: https://jend.leeeet.dev/read.txt?path=bend-collections@1.0.0.0/src/crypto/chacha/chacha20.bend&start_line=94&end_line=100

import Base

# The block function entered through a match on the key's first cell: both
# arms are block_body; with a symbolic key the proof checker leaves the call
# unevaluated instead of unrolling the rounds when it compares types.
def block_rounds(+r: Nat, key_bytes: List<&2, U32>, counter: U32, nonce_bytes: List<&2, U32>) -> List<&2, U32>:
  match key_bytes:
    case Nil{}: block_body(r, Nil{}, counter, nonce_bytes)
    case b <> rest: block_body(r, b <> rest, counter, nonce_bytes)

Uses (4):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  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@1.0.0.0/src/crypto/chacha/chacha20.bend&name=block_body