migrated from redux to recoil

frontend/src/hooks/useRPC.ts

@@ -0,0 +1,11 @@
+import { useRecoilValue } from 'recoil'
+import { rpcClientState } from '../atoms/rpc'
+
+export const useRPC = () => {
+  const client = useRecoilValue(rpcClientState)
+
+  return {
+    client,
+    socket$: client.socket$
+  }
+}