Point.dec_root: def of bend-collections-laws-crypto@1.0.0.0
Import: import bend-collections-laws-crypto@1.0.0.0/src/crypto/ed25519/point.bend as Point
Lines 144-154 of bend-collections-laws-crypto@1.0.0.0/src/crypto/ed25519/point.bend: https://jend.leeeet.dev/read.txt?path=bend-collections-laws-crypto@1.0.0.0/src/crypto/ed25519/point.bend&start_line=144&end_line=154

import Base
import bend-collections-laws-crypto@1.0.0.0/src/crypto/curve25519/field.bend as F

def dec_root(+c: Cs, +x: List<&2, U32>, +y: List<&2, U32>, +x0: U32, +u: List<&2, U32>, +vxx: List<&2, U32>, is_u: Bool, is_nu: Bool) -> Maybe<&2, Pt>:
  match is_u:
    case True{}:
      dec_fin(x, y, x0, Bool.and(F.is_zero(x), U32.is_eq(x0, 1)))
    case False{}:
      match is_nu:
        case True{}:
          +x1 = F.mul(x, cs_s(c))
          dec_fin(x1, y, x0, Bool.and(F.is_zero(x1), U32.is_eq(x0, 1)))
        case False{}:
          None{}

Uses (12):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.and
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.is_eq
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/src/crypto/curve25519/field.bend&name=is_zero
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/src/crypto/curve25519/field.bend&name=mul
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/src/crypto/ed25519/point.bend&name=Cs
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/src/crypto/ed25519/point.bend&name=Pt
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/src/crypto/ed25519/point.bend&name=cs_s
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/src/crypto/ed25519/point.bend&name=dec_fin