Poly1305.r_key: def of bend-collections@1.0.0.0
Import: import bend-collections@1.0.0.0/src/crypto/poly1305/poly1305.bend as Poly1305
Lines 53-55 of bend-collections@1.0.0.0/src/crypto/poly1305/poly1305.bend: https://jend.leeeet.dev/read.txt?path=bend-collections@1.0.0.0/src/crypto/poly1305/poly1305.bend&start_line=53&end_line=55

import Base
import bend-collections@1.0.0.0/src/crypto/poly1305/limbs.bend as L

# r = clamp(key[0..16]) and s = key[16..32], as limbs.
def r_key(+key: List<&2, U32>) -> List<&2, U32>:
  L.fit(16n, mask(clamp(L.take(16n, key), 0n)))

Uses (6):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  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/poly1305/limbs.bend&name=fit
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/crypto/poly1305/limbs.bend&name=take
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/crypto/poly1305/poly1305.bend&name=clamp
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/crypto/poly1305/poly1305.bend&name=mask