Codegen fails when using generic or deprecated CodegenTypes.EventEmitter in TurboModule interfaces

[adeelcheeema]

Before submitting a new issue

• I tested using the latest version of the library, as the bug might be already fixed.
• I tested using a supported version of react native.
• I checked for possible duplicate issues, with possible answers.

Bug summary

When defining a TurboModule interface that includes an EventEmitter with a generic type or using the deprecated CodegenTypes import, React Native Codegen throws an error and stops generating native bindings.

UnsupportedModulePropertyParserError: Module NativeReactNativeScanner:
TypeScript interfaces extending TurboModule must only contain
'FunctionTypeAnnotation's or non nullable 'EventEmitter's.
Property 'onBarcodeScanned' refers to a 'TSTypeReference' or 'TSAnyKeyword'.

✅ Expected behavior

Codegen should:

Either ignore or warn about deprecated internal imports (CodegenTypes),

Or provide a clearer message explaining the correct import path for EventEmitter.

🧩 Actual behavior

Codegen throws a fatal error, preventing native module generation.

Library version

2.0.1"

Environment info

System:
  OS: macOS 26.0.1 (Apple M1)
  CPU: 8-core ARM64, 8 GB RAM
Binaries:
  Node: 20.19.5
  Yarn: 4.6.0
  npm: 10.8.2
  Watchman: 2025.04.28.00
Managers:
  CocoaPods: 1.16.2
SDKs:
  iOS: 26.0 (Xcode 26.0.1 / 17A400)
  Android: Not Found
npmPackages:
  react: 19.0.0
  react-native: 0.79.2
  @react-native-community/cli: 18.0.0
Android/iOS:
  Hermes: enabled
  New Architecture: enabled

Steps to reproduce

Steps to Reproduce

Add the library to your React Native project:

Run the Android build (this triggers Codegen automatically):

During the build step, Codegen throws the error.

Reproducible example repository

https://github.com/pushpender-singh-ap/react-native-scanner

[pushpender-singh-ap]

Hi @adeelcheeema - is this now working fine?

[adeelcheeema]

The issue was with my React Native version. It wasn’t working with React Native 0.79, but it started working after I upgraded it to the latest version.