Kex.shared_of: def of bend-collections@1.0.0.0
Import: import bend-collections@1.0.0.0/src/crypto/kex.bend as Kex
Lines 58-63 of bend-collections@1.0.0.0/src/crypto/kex.bend: https://jend.leeeet.dev/read.txt?path=bend-collections@1.0.0.0/src/crypto/kex.bend&start_line=58&end_line=63

import Base
import bend-collections@1.0.0.0/src/crypto/curve25519/field.bend as F

def shared_of(m: Maybe<&2, List<&2, U32>>) -> Maybe<&2, List<&2, U32>>:
  match m:
    case None{}:
      None{}
    case Some{+ss}:
      nonzero(ss, U32.is_eq(F.sum_all(ss, 0), 0))

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=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.is_eq
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/crypto/curve25519/field.bend&name=sum_all
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/crypto/kex.bend&name=nonzero