Fix: Add mutex lock to prevent trade evaluation race condition during settlement

worker.js

@@ -15,6 +15,18 @@ import fs from 'fs';
 const STATE_FILE = '/tmp/kalbot-state.json';
 const HEARTBEAT_MS = 2000;
 
+// Mutex lock to prevent evaluate() running before onSettlement() callbacks finish
+let isSettling = false;
+async function lockSettling() {
+  while (isSettling) {
+    await new Promise(r => setTimeout(r, 50));
+  }
+  isSettling = true;
+}
+function unlockSettling() {
+  isSettling = false;
+}
+
 async function main() {
   console.log('=== Kalbot Worker Starting ===');
 
@@ -44,6 +56,7 @@ async function main() {
 
   async function processOrphans() {
     if (paper._resetting) return;
+    await lockSettling();
     try {
       const { settled, expired } = await paper.checkOrphans(getMarket);
       const allResolved = [...settled, ...expired];
@@ -59,6 +72,8 @@ async function main() {
       }
     } catch (e) {
       console.error('[Worker] Orphan check error:', e.message);
+    } finally {
+      unlockSettling();
     }
   }
 
@@ -74,7 +89,8 @@ async function main() {
     latestMarketState = state || null;
     writeState(latestMarketState, paper, strategies);
 
-    if (!state || paper._resetting) return;
+    // Skip evaluating strategies if we are settling to avoid race conditions!
+    if (!state || paper._resetting || isSettling) return;
 
     for (const strategy of strategies) {
       if (!strategy.enabled) continue;
@@ -103,6 +119,8 @@ async function main() {
     if (paper._resetting) return;
 
     if (result) {
+      await lockSettling();
+      try {
         const settledPositions = await paper.settle(ticker, result);
         if (settledPositions) {
           for (const strategy of strategies) {
@@ -117,6 +135,9 @@ async function main() {
             'chart_with_upwards_trend'
           );
         }
+      } finally {
+        unlockSettling();
+      }
     } else {
       console.log(`[Worker] Result for ${ticker} pending.`);
     }
@@ -136,6 +157,8 @@ async function main() {
       if (fs.existsSync('/tmp/kalbot-reset-flag')) {
         fs.unlinkSync('/tmp/kalbot-reset-flag');
         console.log('[Worker] Reset flag detected — resetting all paper data');
+        await lockSettling();
+        try {
           await paper.resetAll();
           for (const s of strategies) {
             if (s.consecutiveLosses !== undefined) s.consecutiveLosses = 0;
@@ -149,6 +172,9 @@ async function main() {
           }
           writeState(latestMarketState, paper, strategies);
           await notify('🔄 Paper trading reset by admin', 'Kalbot Reset', 'default', 'recycle');
+        } finally {
+          unlockSettling();
+        }
       }
     } catch {
       // ignore