fix: webSocket ping (#2594)

* fix: copmly websocket ping request with jsonrpc schema

* style: webSocket

* Update webSocket.ts

---------

Co-authored-by: jxom <j@wevm.dev>

.changeset/rude-onions-draw.md

@@ -0,0 +1,5 @@
+---
+"viem": patch
+---
+
+Fixed websocket ping request not conforming to jsonrpc schema.

src/utils/rpc/webSocket.ts

@@ -4,6 +4,7 @@ import {
   SocketClosedError,
   WebSocketRequestError,
 } from '../../errors/request.js'
+import type { RpcRequest } from '../../types/rpc.js'
 import {
   type GetSocketRpcClientParameters,
   type Socket,
@@ -71,7 +72,12 @@ export async function getWebSocketRpcClient(
                 cause: new SocketClosedError({ url: socket.url }),
               })
 
-            socket.send('net_version')
+            const body: RpcRequest = {
+              jsonrpc: '2.0',
+              method: 'net_version',
+              params: [],
+            }
+            socket.send(JSON.stringify(body))
           } catch (error) {
             onError(error as Error)
           }