From 250a60edfa497966ca0e3405f7fb81e579c889ee Mon Sep 17 00:00:00 2001
From: Prathamesh Musale <prathamesh.musale0@gmail.com>
Date: Fri, 13 Sep 2024 09:40:18 +0530
Subject: [PATCH] Add a flag to enable ETH RPC server

---
 packages/util/src/config.ts |  3 +++
 packages/util/src/server.ts | 29 ++++++++++++++++++-----------
 2 files changed, 21 insertions(+), 11 deletions(-)

diff --git a/packages/util/src/config.ts b/packages/util/src/config.ts
index b36fbade..9567a87a 100644
--- a/packages/util/src/config.ts
+++ b/packages/util/src/config.ts
@@ -252,6 +252,9 @@ export interface ServerConfig {
   // Flag to specify whether RPC endpoint supports block hash as block tag parameter
   // https://ethereum.org/en/developers/docs/apis/json-rpc/#default-block
   rpcSupportsBlockHashParam: boolean;
+
+  // Enable ETH JSON RPC server at /rpc
+  enableEthRPCServer: boolean;
 }
 
 export interface FundingAmountsConfig {
diff --git a/packages/util/src/server.ts b/packages/util/src/server.ts
index 12ec71ee..af3e6feb 100644
--- a/packages/util/src/server.ts
+++ b/packages/util/src/server.ts
@@ -24,6 +24,7 @@ import { PaymentsManager, paymentsPlugin } from './payments';
 const log = debug('vulcanize:server');
 
 const DEFAULT_GQL_PATH = '/graphql';
+const ETH_RPC_PATH = '/rpc';
 
 export const createAndStartServer = async (
   app: Application,
@@ -101,19 +102,25 @@ export const createAndStartServer = async (
     path: gqlPath
   });
 
-  // Create a JSON-RPC server to handle ETH RPC calls at /rpc
-  const rpcServer = jayson.Server(ethRPCHandlers);
-
-  // Mount the JSON-RPC server to /rpc path
-  app.use(
-    '/rpc',
-    jsonParser(),
-    // TODO: Handle GET requests as well to match Geth's behaviour
-    rpcServer.middleware()
-  );
+  if (serverConfig.enableEthRPCServer) {
+    // Create a JSON-RPC server to handle ETH RPC calls at /rpc
+    const rpcServer = jayson.Server(ethRPCHandlers);
+
+    // Mount the JSON-RPC server to /rpc path
+    app.use(
+      ETH_RPC_PATH,
+      jsonParser(),
+      // TODO: Handle GET requests as well to match Geth's behaviour
+      rpcServer.middleware()
+    );
+  }
 
   httpServer.listen(port, host, () => {
-    log(`Server is listening on ${host}:${port}${server.graphqlPath}`);
+    log(`GQL server is listening on http://${host}:${port}${server.graphqlPath}`);
+
+    if (serverConfig.enableEthRPCServer) {
+      log(`ETH JSON RPC server is listening on http://${host}:${port}${ETH_RPC_PATH}`);
+    }
   });
 
   return server;