plugins/standard/fraud_detection/plugin.py

from typing import Any

from core.plugin_system.interface import PluginContext, PluginInterface, PluginMetadata


class Plugin(PluginInterface):
    @property
    def metadata(self) -> PluginMetadata:
        return PluginMetadata(
            name="Basic Fraud Detection",
            version="1.0.0",
            namespace="standard/fraud_detection",
            author="Zenith Team",
            description="Rule-based fraud detection engine",
            dependencies={},
            capabilities=["fraud_detection"],
            security_level="official",
            api_version="1.0",
        )

    async def initialize(self, context: PluginContext) -> bool:
        self.context = context
        self.db = context.get_service("db_service")
        return True

    async def execute(self, transaction_data: dict, **kwargs) -> Any:
        # Example logic
        amount = transaction_data.get("amount", 0)
        risk_score = 0.0

        if amount > 10000:
            risk_score = 0.8

        # Safe DB Query via Facade
        if self.db:
            # self.db.query("History", {"user_id": ...})
            pass

        return {
            "risk_score": risk_score,
            "status": "review_required" if risk_score > 0.5 else "approved",
        }

    async def cleanup(self) -> None:
        pass

    def validate_config(self, config: dict[str, Any]) -> list[str]:
        return []