function getSpecHasherimport { getSpecHasher } from "https://deno.land/x/polkadot@0.2.27/types-known/index.ts"; getSpecHasher(unnamed 0: Registry,chainName: Text | string,specName: Text | string,): CodecHasher | nullParametersunnamed 0: RegistrychainName: Text | stringspecName: Text | stringReturnsCodecHasher | null