import { GenericExtrinsicV4 } from "https://deno.land/x/polkadot@0.2.30/types/extrinsic/v4/Extrinsic.ts";
Parameters
signer: Address | Uint8Array | string
signature: Uint8Array | HexString
payload: ExtrinsicPayloadValue | Uint8Array | HexString
x/polkadot/types/extrinsic/v4/Extrinsic.ts>GenericExtrinsicV4#addSignature
import { GenericExtrinsicV4 } from "https://deno.land/x/polkadot@0.2.30/types/extrinsic/v4/Extrinsic.ts";