Ed25519.check: def of bend-collections@1.0.0.0
Import: import bend-collections@1.0.0.0/src/crypto/ed25519/ed25519.bend as Ed25519
Lines 55-62 of bend-collections@1.0.0.0/src/crypto/ed25519/ed25519.bend: https://jend.leeeet.dev/read.txt?path=bend-collections@1.0.0.0/src/crypto/ed25519/ed25519.bend&start_line=55&end_line=62

import Base
import bend-collections@1.0.0.0/src/crypto/ed25519/point.bend as PT

def check(+c: PT.Cs, +sb: List<&2, U32>, +rb: List<&2, U32>, +pk: List<&2, U32>, +msg: List<&2, U32>, ra: Maybe<&2, PT.Pt>, aa: Maybe<&2, PT.Pt>) -> Bool:
  match ra aa:
    case Some{r} Some{+a}:
      +k = hram(rb, pk, msg)
      +b = PT.base(c, pk)
      PT.equal(PT.mul(c, sb, b), PT.add(c, r, PT.mul(c, k, a)))
    case _ _:
      False{}

Uses (11):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  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=U32
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/crypto/ed25519/ed25519.bend&name=hram
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/crypto/ed25519/point.bend&name=Cs
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/crypto/ed25519/point.bend&name=Pt
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/crypto/ed25519/point.bend&name=add
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/crypto/ed25519/point.bend&name=base
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/crypto/ed25519/point.bend&name=equal
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/crypto/ed25519/point.bend&name=mul