Curve.lmul: def of bend-collections-laws-crypto@1.0.0.0
Import: import bend-collections-laws-crypto@1.0.0.0/spec/crypto/secp256k1/curve.bend as Curve
Lines 142-147 of bend-collections-laws-crypto@1.0.0.0/spec/crypto/secp256k1/curve.bend: https://jend.leeeet.dev/read.txt?path=bend-collections-laws-crypto@1.0.0.0/spec/crypto/secp256k1/curve.bend&start_line=142&end_line=147

import Base

# left-to-right double-and-add: for each bit b, R = 2 R, then R = R + A
# when b is set
def lmul(+p: Nat, bs: List<&2, Nat>, +a: SPoint, r: SPoint) -> SPoint:
  match bs:
    case Nil{}: r
    case b <> t: lmul(p, t, a, step(b, p, a, pdbl(p, r)))

Uses (5):
  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=bend-collections-laws-crypto@1.0.0.0/spec/crypto/secp256k1/curve.bend&name=SPoint
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/spec/crypto/secp256k1/curve.bend&name=pdbl
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/spec/crypto/secp256k1/curve.bend&name=step