diff --git a/src/components/p2p/TradeView.tsx b/src/components/p2p/TradeView.tsx
index d8ebac4..8d2c376 100644
--- a/src/components/p2p/TradeView.tsx
+++ b/src/components/p2p/TradeView.tsx
@@ -36,7 +36,7 @@ const STATUS_CONFIG: Record<string, { color: string; icon: typeof Clock }> = {
 };
 
 export function TradeView({ tradeId, onBack }: TradeViewProps) {
-  const { sessionToken, user } = useAuth();
+  const { sessionToken, authUserId } = useAuth();
   const { t, isRTL } = useTranslation();
   const { hapticImpact, hapticNotification } = useTelegram();
 
@@ -47,9 +47,9 @@ export function TradeView({ tradeId, onBack }: TradeViewProps) {
   const [showDispute, setShowDispute] = useState(false);
   const [error, setError] = useState('');
 
-  const userId = user?.id;
-  const isBuyer = trade?.buyer_id === userId;
-  const isSeller = trade?.seller_id === userId;
+  // authUserId = auth.users UUID (matches trade.buyer_id / trade.seller_id)
+  const isBuyer = trade?.buyer_id === authUserId;
+  const isSeller = trade?.seller_id === authUserId;
 
   const fetchTrade = useCallback(async () => {
     if (!sessionToken || !tradeId) return;
diff --git a/src/contexts/AuthContext.tsx b/src/contexts/AuthContext.tsx
index e14fe52..69ea1d7 100644
--- a/src/contexts/AuthContext.tsx
+++ b/src/contexts/AuthContext.tsx
@@ -12,6 +12,7 @@ import type { User } from '@/hooks/useSupabase';
 
 interface AuthContextType {
   user: User | null;
+  authUserId: string | null;
   sessionToken: string | null;
   isLoading: boolean;
   isAuthenticated: boolean;
@@ -49,6 +50,7 @@ function waitForInitData(maxAttempts = 25, intervalMs = 200): Promise<string | n
 
 export function AuthProvider({ children }: { children: ReactNode }) {
   const [user, setUser] = useState<User | null>(null);
+  const [authUserId, setAuthUserId] = useState<string | null>(null);
   const [sessionToken, setSessionToken] = useState<string | null>(null);
   const [isLoading, setIsLoading] = useState(true);
   const [authError, setAuthError] = useState<string | null>(null);
@@ -70,6 +72,7 @@ export function AuthProvider({ children }: { children: ReactNode }) {
       const result = await signInWithTelegram(initData);
       if (result?.user) {
         setUser(result.user);
+        setAuthUserId(result.auth_user_id || null);
         setAuthError(null);
       } else {
         setAuthError('No user returned from auth');
@@ -98,6 +101,7 @@ export function AuthProvider({ children }: { children: ReactNode }) {
     <AuthContext.Provider
       value={{
         user,
+        authUserId,
         sessionToken,
         isLoading,
         isAuthenticated: !!user,