Non determinism warnings

packages/cre-sdk-examples/package.json

@@ -1,7 +1,7 @@
 {
 	"name": "@chainlink/cre-sdk-examples",
 	"private": true,
-	"version": "1.4.0",
+	"version": "1.6.0",
 	"type": "module",
 	"author": "Ernest Nowacki",
 	"license": "BUSL-1.1",

packages/cre-sdk-javy-plugin/package.json

@@ -1,6 +1,6 @@
 {
 	"name": "@chainlink/cre-sdk-javy-plugin",
-	"version": "1.2.0",
+	"version": "1.5.0",
 	"type": "module",
 	"bin": {
 		"cre-setup": "bin/setup.ts",

packages/cre-sdk/package.json

@@ -1,6 +1,6 @@
 {
 	"name": "@chainlink/cre-sdk",
-	"version": "1.4.0",
+	"version": "1.6.0",
 	"type": "module",
 	"main": "dist/index.js",
 	"types": "dist/index.d.ts",

packages/cre-sdk/scripts/run.ts

@@ -5,6 +5,7 @@ import { WorkflowRuntimeCompatibilityError } from './src/validate-workflow-runti
 
 const availableScripts = [
 	'build-types',
+	'check-determinism', // Check for non-deterministic patterns in workflow source
 	'compile-to-js',
 	'compile-to-wasm',
 	'compile-workflow', // TS -> JS -> WASM compilation in single script

packages/cre-sdk/scripts/src/check-determinism.test.ts

@@ -0,0 +1,64 @@
+import { afterEach, beforeEach, describe, expect, test } from 'bun:test'
+import { spawnSync } from 'node:child_process'
+import { mkdtempSync, rmSync, writeFileSync } from 'node:fs'
+import { tmpdir } from 'node:os'
+import path from 'node:path'
+
+let tempDir: string
+
+const scriptsDir = path.resolve(import.meta.dir, '..')
+const runScript = path.join(scriptsDir, 'run.ts')
+
+beforeEach(() => {
+	tempDir = mkdtempSync(path.join(tmpdir(), 'cre-check-determinism-test-'))
+})
+
+afterEach(() => {
+	rmSync(tempDir, { recursive: true, force: true })
+})
+
+const runCheckDeterminism = (filePath: string) =>
+	spawnSync(process.execPath, [runScript, 'check-determinism', filePath], {
+		cwd: scriptsDir,
+		encoding: 'utf-8',
+	})
+
+describe('check-determinism CLI', () => {
+	test('fails when the input file does not exist', () => {
+		const missingFile = path.join(tempDir, 'does-not-exist.ts')
+		const result = runCheckDeterminism(missingFile)
+
+		expect(result.status).toBe(1)
+		expect(result.stdout).not.toContain('No non-determinism warnings found.')
+		expect(result.stderr).toContain(`❌ File not found: ${missingFile}`)
+	})
+
+	test('prints warnings for non-deterministic patterns and exits 0', () => {
+		const filePath = path.join(tempDir, 'workflow.ts')
+		writeFileSync(filePath, `const result = await Promise.race([]);\n`, 'utf-8')
+		const result = runCheckDeterminism(filePath)
+
+		expect(result.status).toBe(0)
+		expect(result.stderr).toContain('Non-determinism warnings')
+		expect(result.stderr).toContain('Promise.race()')
+	})
+
+	test('prints success message for clean workflow and exits 0', () => {
+		const filePath = path.join(tempDir, 'workflow.ts')
+		writeFileSync(filePath, `const x = 1;\n`, 'utf-8')
+		const result = runCheckDeterminism(filePath)
+
+		expect(result.status).toBe(0)
+		expect(result.stdout).toContain('No non-determinism warnings found.')
+	})
+
+	test('fails when no input file is provided', () => {
+		const result = spawnSync(process.execPath, [runScript, 'check-determinism'], {
+			cwd: scriptsDir,
+			encoding: 'utf-8',
+		})
+
+		expect(result.status).toBe(1)
+		expect(result.stderr).toContain('Usage:')
+	})
+})

packages/cre-sdk/scripts/src/check-determinism.ts

@@ -0,0 +1,32 @@
+import { existsSync } from 'node:fs'
+import path from 'node:path'
+import { checkWorkflowDeterminism, printDeterminismWarnings } from './validate-workflow-determinism'
+
+const printUsage = () => {
+	console.error('Usage: bun scripts/run.ts check-determinism <path/to/workflow.ts>')
+	console.error('Example:')
+	console.error('  bun scripts/run.ts check-determinism src/workflows/my-workflow/index.ts')
+}
+
+export const main = () => {
+	const inputPath = process.argv[3]
+
+	if (!inputPath) {
+		printUsage()
+		process.exit(1)
+	}
+
+	const resolvedInput = path.resolve(inputPath)
+	if (!existsSync(resolvedInput)) {
+		console.error(`❌ File not found: ${resolvedInput}`)
+		process.exit(1)
+	}
+
+	const warnings = checkWorkflowDeterminism(resolvedInput)
+
+	if (warnings.length > 0) {
+		printDeterminismWarnings(warnings)
+	} else {
+		console.info('No non-determinism warnings found.')
+	}
+}

packages/cre-sdk/scripts/src/compile-to-js.ts

@@ -4,6 +4,7 @@ import path from 'node:path'
 import { $ } from 'bun'
 import { parseCompileCliArgs, skipTypeChecksFlag } from './compile-cli-args'
 import { assertWorkflowTypecheck } from './typecheck-workflow'
+import { checkWorkflowDeterminism, printDeterminismWarnings } from './validate-workflow-determinism'
 import { assertWorkflowRuntimeCompatibility } from './validate-workflow-runtime-compat'
 import { wrapWorkflowCode } from './workflow-wrapper'
 
@@ -60,6 +61,12 @@ export const main = async (
 		assertWorkflowTypecheck(resolvedInput)
 	}
 	assertWorkflowRuntimeCompatibility(resolvedInput)
+	if (!parsedSkipTypeChecks) {
+		const warnings = checkWorkflowDeterminism(resolvedInput)
+		if (warnings.length > 0) {
+			printDeterminismWarnings(warnings)
+		}
+	}
 	console.info(`📁 Using input file: ${resolvedInput}`)
 
 	// If no explicit output path → same dir, swap extension to .js