def lxb

bend-collections-laws-crypto@1.0.0.0 · proofs/crypto/secp256k1/pschn.bend:174

import Base
import bend-collections-laws-crypto@1.0.0.0/spec/crypto/secp256k1/field.bend as FS
import bend-collections-laws-crypto@1.0.0.0/spec/crypto/secp256k1/curve.bend as CV
import bend-collections-laws-crypto@1.0.0.0/spec/crypto/secp256k1/schnorr.bend as SS
import bend-collections-laws-crypto@1.0.0.0/src/crypto/secp256k1/schnorr.bend as SC
import bend-collections-laws-crypto@1.0.0.0/proofs/crypto/secp256k1/sel.bend as SL
import bend-collections-laws-crypto@1.0.0.0/proofs/crypto/secp256k1/penc.bend as PE

174def lxb(+one: Nat, +h1: {one == 1n : Nat}, +x: List<&2, Nat>, +hl: {FS.limbs16(one, 16n, x) == True{} : Bool}, b: Bool, +hb: {Nat.is_lt(FS.value(one, x), FS.prime(one)) == b : Bool}) -> {PE.mpv(one, SC.lift_if(x, b)) == SS.lift_if(one, FS.value(one, x), b) : Maybe<&2, CV.SPoint>}:
175  match b:
176    case True{}:
177      PE.decompress_v(one, h1, x, 0n, SL.red_of(one, x, hl, hb), {==})
178    case False{}:
179      {==}