X25519.ladder: def of bend-collections-laws-crypto@1.0.0.0
Import: import bend-collections-laws-crypto@1.0.0.0/src/crypto/curve25519/x25519.bend as X25519
Lines 109-115 of bend-collections-laws-crypto@1.0.0.0/src/crypto/curve25519/x25519.bend: https://jend.leeeet.dev/read.txt?path=bend-collections-laws-crypto@1.0.0.0/src/crypto/curve25519/x25519.bend&start_line=109&end_line=115

import Base

# bits t = n - 1 down to 0
def ladder(n: Nat, +c24: List<&2, U32>, +k: List<&2, U32>, +x1: List<&2, U32>, st: St) -> St:
  match n:
    case 0n:
      st
    case 1n+ +t:
      ladder(t, c24, k, x1, rung(c24, x1, st, kbit(k, t)))

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=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/src/crypto/curve25519/x25519.bend&name=St
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/src/crypto/curve25519/x25519.bend&name=kbit
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/src/crypto/curve25519/x25519.bend&name=rung