def parity

bend-collections@1.0.0.0 · src/crypto/secp256k1/field.bend:127

import Base
import bend-collections@1.0.0.0/src/crypto/secp256k1/limbs.bend as L

127# a mod 2 (the parity of the canonical representative)
128def parity(a: List<&2, Nat>) -> Nat:
129  Nat.mod(L.hd0(a), 2n)