# sendNullable(_:params:) Sends an RPC and decodes the result into `T?`. Null is a valid domain value. ``` func sendNullable(_ method: String, params: [RPCParam] = []) async throws -> T? where T : Decodable, T : Sendable ``` ## Parameters `method` The RPC method name. `params` The parameters to pass to the RPC method. ## Return Value The decoded result, or `nil` if the server returned null. ## Discussion Use for RPCs where `null` means something (e.g., `getTxOut` null = spent). > Throws: `RPCError` (server), ``doc://Bitcoin/documentation/Bitcoin/RPCClientError`` (client), or transport errors.