1234567891011121314151617

import { compactAddLength, isU8a, stringToU8a, u8aConcat } from 'https://deno.land/x/polkadot@0.2.40/util/mod.ts';
import { blake2AsU8a } from '../blake2/asU8a.ts';
const HDKD = compactAddLength(stringToU8a('Ed25519HDKD'));
export function ed25519DeriveHard (seed: Uint8Array, chainCode: Uint8Array): Uint8Array {  if (!isU8a(chainCode) || chainCode.length !== 32) {    throw new Error('Invalid chainCode passed to derive');  }
  return blake2AsU8a(    u8aConcat(HDKD, seed, chainCode)  );}