function createKeyDerivedimport { createKeyDerived } from "https://deno.land/x/polkadot@0.2.25/util-crypto/mod.ts"; createKeyDerived(who: HexString | Uint8Array | string, index: bigint | BN | number): Uint8ArrayParameterswho: HexString | Uint8Array | stringindex: bigint | BN | numberReturnsUint8Array