# sendVoid(_:params:) Sends an RPC expected to return null. If Bitcoin Core returns a non-null string, logs `.warning` — may indicate the RPC’s semantics changed in a newer Core version. Fixture tests are the primary detection mechanism; this log is a secondary signal for runtime visibility. ``` func sendVoid(_ method: String, params: [RPCParam] = []) async throws ``` ## Parameters `method` The RPC method name. `params` The parameters to pass to the RPC method. ## Discussion> Throws: `RPCError` (server) or transport errors.