guard let provider = InfuraWebsocketProvider.connectToInfuraSocket(.Mainnet, delegate: spyDelegate) else {print("provider error!"); return}
self.socketProvider = provider

do {
try self.socketProvider!.subscribeOnLogs(addresses: [EthereumAddress("0x6B175474E89094C44Da98b954EedeAC495271d0F")!], topics: ["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef"])

}catch{
self.socketProvider!.disconnectSocket()
print("catch websocket: (error)")
}

i tried to subscribe on logs of this smart-contract and socket connected but i don't get any thing in didReceive delegate method !!!