fix: Use Docker service names in BlockchainClient for internal container communication

The backend container needs to reach validators using their Docker service names
(validator-1, validator-2, validator-3) instead of localhost:PORT.

This fixes the 'validators unreachable' warning on backend startup.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

e-voting-system/backend/blockchain_client.py

@@ -49,21 +49,23 @@ class BlockchainClient:
     """
 
     # Default validator configuration
+    # Use Docker service names for internal container communication
+    # For external access (outside Docker), use localhost:PORT
     DEFAULT_VALIDATORS = [
         ValidatorNode(
             node_id="validator-1",
-            rpc_url="http://localhost:8001",
-            p2p_url="http://localhost:30303"
+            rpc_url="http://validator-1:8001",
+            p2p_url="http://validator-1:30303"
         ),
         ValidatorNode(
             node_id="validator-2",
-            rpc_url="http://localhost:8002",
-            p2p_url="http://localhost:30304"
+            rpc_url="http://validator-2:8001",
+            p2p_url="http://validator-2:30303"
         ),
         ValidatorNode(
             node_id="validator-3",
-            rpc_url="http://localhost:8003",
-            p2p_url="http://localhost:30305"
+            rpc_url="http://validator-3:8001",
+            p2p_url="http://validator-3:30303"
         ),
     ]
 

e-voting-system/frontend/lib/api.ts

@@ -3,7 +3,9 @@
  * Handles all communication with the FastAPI backend
  */
 
-const API_URL = process.env.NEXT_PUBLIC_API_URL || "http://localhost:8000"
+// Use relative paths to go through Next.js proxy routes
+// which handle the conversion between camelCase (frontend) and snake_case (backend)
+const API_URL = ""
 
 export interface ApiResponse<T> {
   data?: T
@@ -25,6 +27,7 @@ export interface VoterProfile {
   email: string
   first_name: string
   last_name: string
+  has_voted: boolean
   created_at: string
 }
 
@@ -148,9 +151,9 @@ export const authApi = {
       body: JSON.stringify({
         email,
         password,
-        first_name: firstName,
-        last_name: lastName,
-        citizen_id: citizenId,
+        firstName,
+        lastName,
+        citizenId,
       }),
     })
   },
@@ -229,6 +232,25 @@ export const votesApi = {
   async getHistory() {
     return apiRequest<VoteHistory[]>("/api/votes/history")
   },
+
+  async getBlockchain(electionId: number) {
+    return apiRequest<any>(`/api/votes/blockchain?election_id=${electionId}`)
+  },
+
+  async getResults(electionId: number) {
+    return apiRequest<any>(`/api/votes/results?election_id=${electionId}`)
+  },
+
+  async verifyBlockchain(electionId: number) {
+    return apiRequest<any>("/api/votes/verify-blockchain", {
+      method: "POST",
+      body: JSON.stringify({ election_id: electionId }),
+    })
+  },
+
+  async getTransactionStatus(transactionId: string, electionId: number) {
+    return apiRequest<any>(`/api/votes/transaction-status?transaction_id=${transactionId}&election_id=${electionId}`)
+  },
 }
 
 /**