function secp256k1Expandimport { secp256k1Expand } from "https://deno.land/x/polkadot@0.2.25/util-crypto/mod.ts"; secp256k1Expand(publicKey: Uint8Array, onlyJs?: boolean): Uint8ArrayParameterspublicKey: Uint8ArrayoptionalonlyJs: booleanReturnsUint8Array