Schnorr.verify_aff: def of bend-collections@1.0.0.0
Import: import bend-collections@1.0.0.0/src/crypto/secp256k1/schnorr.bend as Schnorr
Lines 46-48 of bend-collections@1.0.0.0/src/crypto/secp256k1/schnorr.bend: https://jend.leeeet.dev/read.txt?path=bend-collections@1.0.0.0/src/crypto/secp256k1/schnorr.bend&start_line=46&end_line=48

import Base
import bend-collections@1.0.0.0/src/crypto/secp256k1/field.bend as F
import bend-collections@1.0.0.0/src/crypto/secp256k1/point.bend as P

def verify_aff(+r: List<&2, Nat>, inf: Bool, a: P.Affine) -> Bool:
  match a:
    case P.Affine{x, +y}: Bool.and(Bool.not(inf), Bool.and(Nat.is_eq(is_odd(y), 0n), F.eq(x, r)))

Uses (9):
  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=Bool.not
  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.is_eq
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/crypto/secp256k1/field.bend&name=eq
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/crypto/secp256k1/point.bend&name=Affine
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/crypto/secp256k1/schnorr.bend&name=is_odd