add eth rpc url to auth-eth-bun info endpoint

Author: Leechael

kms/auth-eth-bun/index.test.ts

@@ -58,6 +58,7 @@ describe('API Compatibility Tests', () => {
       expect(data).toMatchObject({
         status: 'ok',
         kmsContractAddr: '0x1234567890123456789012345678901234567890',
+        ethRpcUrl: 'http://localhost:8545',
         gatewayAppId: expect.any(String),
         chainId: expect.any(Number),
         appAuthImplementation: expect.any(String),
@@ -345,6 +346,7 @@ describe('API Schema Compatibility', () => {
     expect(systemInfoSchema.required).toEqual([
       'status',
       'kmsContractAddr',
+      'ethRpcUrl',
       'gatewayAppId',
       'chainId',
       'appAuthImplementation',

kms/auth-eth-bun/index.ts

@@ -213,6 +213,7 @@ app.get('/', async (c) => {
     return c.json({
       status: 'ok',
       kmsContractAddr: kmsContractAddr,
+      ethRpcUrl: rpcUrl,
       gatewayAppId: batch[0],
       chainId: batch[1],
       appAuthImplementation: batch[2], // NOTE: for backward compatibility

kms/auth-eth-bun/openapi.json

@@ -181,6 +181,7 @@
         "required": [
           "status",
           "kmsContractAddr",
+          "ethRpcUrl",
           "gatewayAppId",
           "chainId",
           "appAuthImplementation",
@@ -196,6 +197,10 @@
             "type": "string",
             "description": "KMS contract address"
           },
+          "ethRpcUrl": {
+            "type": "string",
+            "description": "Ethereum RPC URL"
+          },
           "gatewayAppId": {
             "type": "string", 
             "description": "Gateway application ID"