// Copyright (C) 2026 Whiterun LLC,
// This software is licensed under the GNU Lesser General Public License (LGPL), version 3.0 or later.
// A copy of the license can be found in the LICENSE file or at https://www.gnu.org/licenses/lgpl-3.0.html

import { binToHex, secp256k1 } from "@bitauth/libauth";
import { unwrap } from "./primitives.js";

export function deriveNostrPublicKey(privateKey: Uint8Array): string {
  const publicKeyCompressed = unwrap(
    secp256k1.derivePublicKeyCompressed(privateKey),
  );
  const publicKeyNostr = publicKeyCompressed.slice(1);
  return binToHex(publicKeyNostr);
}

export function deriveNostrPublicKeyBytes(privateKey: Uint8Array): Uint8Array {
  const publicKeyCompressed = unwrap(
    secp256k1.derivePublicKeyCompressed(privateKey),
  );
  return publicKeyCompressed.slice(1);
}