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import type { BN } from 'https://deno.land/x/polkadot@0.2.40/util/mod.ts';import type { HexString } from 'https://deno.land/x/polkadot@0.2.40/util/types.ts';
import { bnToU8a, stringToU8a, u8aConcat } from 'https://deno.land/x/polkadot@0.2.40/util/mod.ts';
import { blake2AsU8a } from '../blake2/asU8a.ts';import { BN_LE_16_OPTS } from '../bn.ts';import { decodeAddress } from './decode.ts';
const PREFIX = stringToU8a('modlpy/utilisuba');
export function createKeyDerived (who: HexString | Uint8Array | string, index: bigint | BN | number): Uint8Array {  return blake2AsU8a(    u8aConcat(      PREFIX,      decodeAddress(who),      bnToU8a(index, BN_LE_16_OPTS)    )  );}