method types.GenericExtrinsicPayload.prototype.signimport { types } from "https://dotland.deno.dev/x/polkadot@0.2.45/mod.ts"; const { GenericExtrinsicPayload } = types; sign(signerPair: IKeyringPair): { signature: HexString; }ParameterssignerPair: IKeyringPairReturns{ signature: HexString; }