fix: restore rpc service message errors

Author: cryptodev-2s

packages/network-controller/src/rpc-service/rpc-service.test.ts

@@ -362,7 +362,7 @@ describe('RpcService', () => {
           jsonrpc: '2.0',
           error: {
             code: -32601,
-            message: 'Method not supported by this RPC endpoint',
+            message: 'The method does not exist / is not available.',
           },
         });
       });
@@ -452,7 +452,7 @@ describe('RpcService', () => {
           jsonrpc: '2.0',
           error: {
             code: -32005,
-            message: 'Request rate limit exceeded',
+            message: 'Request is being rate limited.',
             data: {
               retryAfter: 1000,
             },
@@ -490,7 +490,7 @@ describe('RpcService', () => {
           jsonrpc: '2.0',
           error: {
             code: -32005,
-            message: 'Request rate limit exceeded',
+            message: 'Request is being rate limited.',
             data: {
               retryAfter: 5000,
             },

packages/network-controller/src/rpc-service/rpc-service.ts

@@ -483,7 +483,7 @@ export class RpcService implements AbstractRpcService {
           jsonrpc: jsonRpcRequest.jsonrpc,
           error: {
             code: -32601,
-            message: 'Method not supported by this RPC endpoint',
+            message: 'The method does not exist / is not available.',
           },
         };
       }
@@ -497,7 +497,7 @@ export class RpcService implements AbstractRpcService {
           jsonrpc: jsonRpcRequest.jsonrpc,
           error: {
             code: -32005,
-            message: 'Request rate limit exceeded',
+            message: 'Request is being rate limited.',
             data: {
               retryAfter: retryDelay,
             },