Limbs.diff: def of bend-collections@1.0.0.0
Import: import bend-collections@1.0.0.0/src/crypto/secp256k1/limbs.bend as Limbs
Lines 199-202 of bend-collections@1.0.0.0/src/crypto/secp256k1/limbs.bend: https://jend.leeeet.dev/read.txt?path=bend-collections@1.0.0.0/src/crypto/secp256k1/limbs.bend&start_line=199&end_line=202

import Base

def diff(xs: List<&2, Nat>, ys: List<&2, Nat>, acc: Nat) -> Nat:
  match xs ys:
    case +x <> xt +y <> yt: diff(xt, yt, Nat.add(acc, Nat.add(Nat.sub(x, y), Nat.sub(y, x))))
    case _ _: acc

Uses (4):
  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=Nat.add
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.sub