Fmt.Big.add: def of bend-kit-fmt@0.1.0.0
Import: import bend-kit-fmt@0.1.0.0/fmt.bend as Fmt
Lines 142-148 of bend-kit-fmt@0.1.0.0/fmt.bend: https://jend.leeeet.dev/read.txt?path=bend-kit-fmt@0.1.0.0/fmt.bend&start_line=142&end_line=148

import Base

def Big.add(a: List<&2, U32>, b: List<&2, U32>, c: U32) -> List<&2, U32>:
  match a b:
    case Con{x, xs} Con{y, ys}:
      +t = {U32.add(U32.add(x, y), c) : U32}
      Con{U32.and(t, 65535), Big.add(xs, ys, U32.shrn(t, 16n))}
    case _ _:
      Nil{}

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=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.add
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.and
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.shrn