from typing import Any from core.tools.errors import ToolProviderCredentialValidationError from core.tools.provider.builtin.qrcode.tools.qrcode_generator import QRCodeGeneratorTool from core.tools.provider.builtin_tool_provider import BuiltinToolProviderController class QRCodeProvider(BuiltinToolProviderController): def _validate_credentials(self, credentials: dict[str, Any]) -> None: try: QRCodeGeneratorTool().invoke(user_id='', tool_parameters={ 'content': 'Dify 123 😊' }) except Exception as e: raise ToolProviderCredentialValidationError(str(e))