method GenericExtrinsicV4.prototype.addSignatureimport { GenericExtrinsicV4 } from "https://dotland.deno.dev/x/polkadot@0.2.35/types/mod.ts"; addSignature(signer: Address | Uint8Array | string,signature: Uint8Array | HexString,payload: ExtrinsicPayloadValue | Uint8Array | HexString,): GenericExtrinsicV4Parameterssigner: Address | Uint8Array | stringsignature: Uint8Array | HexStringpayload: ExtrinsicPayloadValue | Uint8Array | HexStringReturnsGenericExtrinsicV4