method Init.prototype.atimport { Init } from "https://deno.land/x/polkadot@0.2.25/api/base/Init.ts"; at(blockHash: Uint8Array | string, knownVersion?: RuntimeVersion): Promise<ApiDecoration<ApiType>>ParametersblockHash: Uint8Array | stringoptionalknownVersion: RuntimeVersionReturnsPromise<ApiDecoration<ApiType>>