diff --git a/contracts/staking_rewards/src/lib.rs b/contracts/staking_rewards/src/lib.rs
index 9daa544..483c1db 100644
--- a/contracts/staking_rewards/src/lib.rs
+++ b/contracts/staking_rewards/src/lib.rs
@@ -13,6 +13,7 @@ pub const SCALE: i128 = 1_000_000_000_000_000_000; // 18 decimals
 pub enum DataKey {
     Config,
     UserState(Address),
+    TotalStaked,
 }
 
 // ── Configuration Struct ──────────────────────────────────────
@@ -242,10 +243,18 @@ impl StakingRewards {
             start_block,
             is_paused: false,
         };
-
+        
+        // Update total staked
+        let mut total_staked = e.storage().instance().get(&DataKey::TotalStaked).unwrap_or(0);
+        total_staked = total_staked
+            .checked_add(amount)
+            .ok_or(ContractError::Overflow)?;
+        e.storage().instance().set(&DataKey::TotalStaked, &total_staked);
+        
         e.storage().instance().set(&DataKey::Config, &config);
+        e.storage().instance().set(&DataKey::TotalStaked, &0i128);
         e.storage().instance().extend_ttl(10000, 10000);
-
+        
         Ok(())
     }
 
@@ -315,6 +324,12 @@ impl StakingRewards {
             .staked_amount
             .checked_sub(amount)
             .ok_or(ContractError::Overflow)?;
+        
+        // Update total staked
+        let mut total_staked = e.storage().instance().get(&DataKey::TotalStaked).unwrap_or(0);
+        total_staked = total_staked
+            .checked_sub(amount)
+            .ok_or(ContractError::Overflow)?;
 
         if state.staked_amount == 0 && state.accrued_rewards == 0 {
             e.storage()
@@ -409,6 +424,13 @@ impl StakingRewards {
 
         let state: UserStakingState = e.storage().persistent().get(&state_key).unwrap();
         let staked_amount = state.staked_amount;
+        
+        // Update total staked
+        let mut total_staked = e.storage().instance().get(&DataKey::TotalStaked).unwrap_or(0);
+        total_staked = total_staked
+            .checked_sub(staked_amount)
+            .ok_or(ContractError::Overflow)?;
+        e.storage().instance().set(&DataKey::TotalStaked, &total_staked);
 
         if staked_amount <= 0 {
             return Ok(0);
@@ -494,6 +516,9 @@ impl StakingRewards {
         let t_curr = e.ledger().sequence();
 
         if state.staked_amount > 0 && t_curr > state.last_update_block {
+            // Time-based reward calculation: V_new = V_old * multiplier, where
+            // multiplier = exp(integral of reward rate over time). Rewards are
+            // computed as R_new = V_new - staked_amount to avoid rounding errors.
             let multiplier_res = calculate_multiplier(&config, state.last_update_block, t_curr);
             if let Ok(multiplier) = multiplier_res {
                 let v_old_res = state.staked_amount.checked_add(state.accrued_rewards);
@@ -541,6 +566,9 @@ impl StakingRewards {
         let t_curr = e.ledger().sequence();
 
         if state.staked_amount > 0 && t_curr > state.last_update_block {
+            // Time-based reward calculation: V_new = V_old * multiplier, where
+            // multiplier = exp(integral of reward rate over time). Rewards are
+            // computed as R_new = V_new - staked_amount to avoid rounding errors.
             let multiplier = calculate_multiplier(config, state.last_update_block, t_curr)?;
 
             // Virtual Balance V = S + R
diff --git a/web/pages/index.tsx b/web/pages/index.tsx
index 780012b..60911db 100644
--- a/web/pages/index.tsx
+++ b/web/pages/index.tsx
@@ -74,7 +74,60 @@ export default function Home() {
     }
   };
 
-  return (
+  const handleFileAnalysis = async (file: File) => {
+    setLoading(true);
+    let errorType: string | undefined;
+    try {
+      // Convert file to ArrayBuffer
+      const arrayBuffer = await file.arrayBuffer();
+      const response = await fetch('http://localhost:8080/analyze', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/octet-stream' },
+        body: arrayBuffer,
+      });
+
+      if (!response.ok) {
+        // Parse error response from backend
+        const errorResponse = await extractErrorDetails(response);
+        errorType = errorResponse.error;
+        const userMessage = createUserFriendlyMessage(errorResponse);
+        throw new Error(userMessage);
+      }
+
+      const report = await response.json();
+
+      const result: InvocationResult = {
+        id: Math.random().toString(36).substring(7),
+        functionName: 'WASM Analysis',
+        inputs: {},
+        result: null,
+        resourceCost: report,
+        timestamp: Date.now(),
+        success: true,
+      };
+
+      setCurrentResult(result);
+      addToHistory(result);
+    } catch (error) {
+      const errorMessage = error instanceof Error ? error.message : 'An unexpected error occurred during analysis';
+      
+      const errorResult: InvocationResult = {
+        id: Math.random().toString(36).substring(7),
+        functionName: 'WASM Analysis',
+        inputs: {},
+        error: errorMessage,
+        errorType: errorType || 'UNKNOWN_ERROR',
+        timestamp: Date.now(),
+        success: false,
+      };
+      setCurrentResult(errorResult);
+      addToHistory(errorResult);
+    } finally {
+      setLoading(false);
+    }
+  };
+
+   return (
     <div style={{ minHeight: '100vh', backgroundColor: '#0f1117' }}>
       {/* Header */}
       <header
@@ -142,11 +195,11 @@ export default function Home() {
               </div>
             )}
           >
-            <UploadZone
-              onFileReady={(file) => {
-                console.log('[UploadZone] Contract ready for analysis:', file.name, file.size, 'bytes');
-                // TODO: wire into your analysis flow, e.g. POST file bytes to /analyze
-              }}
+             <UploadZone
+               onFileReady={(file) => {
+                 console.log('[UploadZone] Contract ready for analysis:', file.name, file.size, 'bytes');
+                 handleFileAnalysis(file);
+               }}
             />
           </ErrorBoundary>
         </div>