Point.smul: def of bend-collections@1.0.0.0
Import: import bend-collections@1.0.0.0/src/crypto/ed25519/point.bend as Point
Lines 100-107 of bend-collections@1.0.0.0/src/crypto/ed25519/point.bend: https://jend.leeeet.dev/read.txt?path=bend-collections@1.0.0.0/src/crypto/ed25519/point.bend&start_line=100&end_line=107

import Base
import bend-collections@1.0.0.0/src/crypto/curve25519/x25519.bend as X

# [bits t = n - 1 .. 0 of bs] p added to 2^n q: double, add, select
def smul(n: Nat, +c: Cs, +bs: List<&2, U32>, +p: Pt, q: Pt) -> Pt:
  match n:
    case 0n:
      q
    case 1n+ +t:
      +q2 = double(q)
      smul(t, c, bs, p, select(X.kbit(bs, t), q2, add(c, q2, p)))

Uses (9):
  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/curve25519/x25519.bend&name=kbit
  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=double
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/crypto/ed25519/point.bend&name=select