From 78b7643e65143cbd592677b29266f44ae7402aad Mon Sep 17 00:00:00 2001
From: Vikhyath Mondreti <vikhyathvikku@gmail.com>
Date: Thu, 18 Dec 2025 11:02:01 -0800
Subject: [PATCH] fix(condition): async execution isolated vm error (#2446)

* fix(condition): async execution isolated vm error

* fix tests
---
 .../condition/condition-handler.test.ts       | 37 ++++++++++--------
 .../handlers/condition/condition-handler.ts   | 39 +++++++++++--------
 2 files changed, 43 insertions(+), 33 deletions(-)

diff --git a/apps/sim/executor/handlers/condition/condition-handler.test.ts b/apps/sim/executor/handlers/condition/condition-handler.test.ts
index b4c3eac00..7dd6e5cee 100644
--- a/apps/sim/executor/handlers/condition/condition-handler.test.ts
+++ b/apps/sim/executor/handlers/condition/condition-handler.test.ts
@@ -17,27 +17,32 @@ vi.mock('@/lib/core/utils/request', () => ({
   generateRequestId: vi.fn(() => 'test-request-id'),
 }))
 
-vi.mock('@/lib/execution/isolated-vm', () => ({
-  executeInIsolatedVM: vi.fn(),
+vi.mock('@/tools', () => ({
+  executeTool: vi.fn(),
 }))
 
-import { executeInIsolatedVM } from '@/lib/execution/isolated-vm'
+import { executeTool } from '@/tools'
 
-const mockExecuteInIsolatedVM = executeInIsolatedVM as ReturnType<typeof vi.fn>
+const mockExecuteTool = executeTool as ReturnType<typeof vi.fn>
 
-function simulateIsolatedVMExecution(
-  code: string,
-  contextVariables: Record<string, unknown>
-): { result: unknown; stdout: string; error?: { message: string; name: string } } {
+/**
+ * Simulates what the function_execute tool does when evaluating condition code
+ */
+function simulateConditionExecution(code: string): {
+  success: boolean
+  output?: { result: unknown }
+  error?: string
+} {
   try {
-    const fn = new Function(...Object.keys(contextVariables), code)
-    const result = fn(...Object.values(contextVariables))
-    return { result, stdout: '' }
+    // The code is in format: "const context = {...};\nreturn Boolean(...)"
+    // We need to execute it and return the result
+    const fn = new Function(code)
+    const result = fn()
+    return { success: true, output: { result } }
   } catch (error: any) {
     return {
-      result: null,
-      stdout: '',
-      error: { message: error.message, name: error.name || 'Error' },
+      success: false,
+      error: error.message,
     }
   }
 }
@@ -143,8 +148,8 @@ describe('ConditionBlockHandler', () => {
 
     vi.clearAllMocks()
 
-    mockExecuteInIsolatedVM.mockImplementation(async ({ code, contextVariables }) => {
-      return simulateIsolatedVMExecution(code, contextVariables)
+    mockExecuteTool.mockImplementation(async (_toolId: string, params: { code: string }) => {
+      return simulateConditionExecution(params.code)
     })
   })
 
diff --git a/apps/sim/executor/handlers/condition/condition-handler.ts b/apps/sim/executor/handlers/condition/condition-handler.ts
index bd69c77f4..07b0c3336 100644
--- a/apps/sim/executor/handlers/condition/condition-handler.ts
+++ b/apps/sim/executor/handlers/condition/condition-handler.ts
@@ -1,10 +1,9 @@
-import { generateRequestId } from '@/lib/core/utils/request'
-import { executeInIsolatedVM } from '@/lib/execution/isolated-vm'
 import { createLogger } from '@/lib/logs/console/logger'
 import type { BlockOutput } from '@/blocks/types'
 import { BlockType, CONDITION, DEFAULTS, EDGE } from '@/executor/constants'
 import type { BlockHandler, ExecutionContext } from '@/executor/types'
 import type { SerializedBlock } from '@/serializer/types'
+import { executeTool } from '@/tools'
 
 const logger = createLogger('ConditionBlockHandler')
 
@@ -39,32 +38,38 @@ export async function evaluateConditionExpression(
   }
 
   try {
-    const requestId = generateRequestId()
+    const contextSetup = `const context = ${JSON.stringify(evalContext)};`
+    const code = `${contextSetup}\nreturn Boolean(${resolvedConditionValue})`
 
-    const code = `return Boolean(${resolvedConditionValue})`
+    const result = await executeTool(
+      'function_execute',
+      {
+        code,
+        timeout: CONDITION_TIMEOUT_MS,
+        envVars: {},
+        _context: {
+          workflowId: ctx.workflowId,
+          workspaceId: ctx.workspaceId,
+        },
+      },
+      false,
+      false,
+      ctx
+    )
 
-    const result = await executeInIsolatedVM({
-      code,
-      params: {},
-      envVars: {},
-      contextVariables: { context: evalContext },
-      timeoutMs: CONDITION_TIMEOUT_MS,
-      requestId,
-    })
-
-    if (result.error) {
-      logger.error(`Failed to evaluate condition: ${result.error.message}`, {
+    if (!result.success) {
+      logger.error(`Failed to evaluate condition: ${result.error}`, {
         originalCondition: conditionExpression,
         resolvedCondition: resolvedConditionValue,
         evalContext,
         error: result.error,
       })
       throw new Error(
-        `Evaluation error in condition: ${result.error.message}. (Resolved: ${resolvedConditionValue})`
+        `Evaluation error in condition: ${result.error}. (Resolved: ${resolvedConditionValue})`
       )
     }
 
-    return Boolean(result.result)
+    return Boolean(result.output?.result)
   } catch (evalError: any) {
     logger.error(`Failed to evaluate condition: ${evalError.message}`, {
       originalCondition: conditionExpression,