method ApiBase.prototype.signimport { ApiBase } from "https://deno.land/x/polkadot@0.2.29/api/base/index.ts"; sign(address: KeyringSigner | string,data: SignerPayloadRawBase,unnamed 2?: SignerRawOptions,): Promise<string>Parametersaddress: KeyringSigner | stringdata: SignerPayloadRawBaseoptionalunnamed 2: SignerRawOptions = [UNSUPPORTED]ReturnsPromise<string>