function utilCrypto.secp256k1Expandimport { utilCrypto } from "https://dotland.deno.dev/x/polkadot@0.2.45/mod.ts"; const { secp256k1Expand } = utilCrypto; secp256k1Expand(publicKey: Uint8Array, onlyJs?: boolean): Uint8ArrayParameterspublicKey: Uint8ArrayoptionalonlyJs: booleanReturnsUint8Array