{
  "context": "This criteria evaluates how well the engineer uses web3.py's middleware system to implement a request logging component. The focus is on proper middleware creation, integration with the Web3 instance, and correct usage of the middleware pipeline pattern.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "Middleware function signature",
      "description": "The middleware function follows the correct signature pattern: `make_request, web3` parameters and returns a callable that takes `method, params`.",
      "max_score": 20
    },
    {
      "name": "Web3.middleware_onion usage",
      "description": "Uses `Web3.middleware_onion.inject()` or `Web3.middleware_onion.add()` to properly attach the middleware to the Web3 instance's middleware stack.",
      "max_score": 25
    },
    {
      "name": "Request interception",
      "description": "Correctly intercepts requests by capturing `method` and `params` arguments before calling `make_request(method, params)` to pass the request down the middleware chain.",
      "max_score": 20
    },
    {
      "name": "Response handling",
      "description": "Properly captures the response by storing the return value from `make_request(method, params)` before returning it to maintain the middleware pipeline flow.",
      "max_score": 15
    },
    {
      "name": "State management",
      "description": "Maintains state across multiple requests using instance variables or closure variables to track call history and request count.",
      "max_score": 10
    },
    {
      "name": "Call history structure",
      "description": "Returns call history as a list of dictionaries with the required keys: `method`, `params`, `response`, and `timestamp` in the correct format.",
      "max_score": 10
    }
  ]
}