from typing import Any from core.tools.errors import ToolProviderCredentialValidationError from core.tools.provider.builtin.stepfun.tools.image import StepfunTool from core.tools.provider.builtin_tool_provider import BuiltinToolProviderController class StepfunProvider(BuiltinToolProviderController): def _validate_credentials(self, credentials: dict[str, Any]) -> None: try: StepfunTool().fork_tool_runtime( runtime={ "credentials": credentials, } ).invoke( user_id="", tool_parameters={ "prompt": "cute girl, blue eyes, white hair, anime style", "size": "256x256", "n": 1, }, ) except Exception as e: raise ToolProviderCredentialValidationError(str(e))