pub fn new_chain_ops(
config: &mut Configuration,
eth_config: &EthConfiguration,
) -> Result<(Arc<TFullClient<Block, RuntimeApi, WasmExecutor<(SubstrateHostFunctions, HostFunctions)>>>, Arc<TFullBackend<Block>>, BasicQueue<Block>, TaskManager, Backend<Block, TFullClient<Block, RuntimeApi, WasmExecutor<(SubstrateHostFunctions, HostFunctions)>>>), Error>