{
  "context": "This evaluation assesses how effectively the engineer uses bitcoinjs-lib's Transaction class and related methods to create, serialize, parse, and manipulate Bitcoin transactions. The focus is on proper usage of the library's transaction APIs rather than general coding practices.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "Transaction construction",
      "description": "Uses the Transaction class constructor or factory method to create new transaction objects with proper initialization",
      "max_score": 15
    },
    {
      "name": "Input addition",
      "description": "Uses addInput() method or direct manipulation of the transaction's ins array to add inputs with hash, index, script, and sequence parameters",
      "max_score": 20
    },
    {
      "name": "Output addition",
      "description": "Uses addOutput() method or direct manipulation of the transaction's outs array to add outputs with value and script parameters",
      "max_score": 20
    },
    {
      "name": "Hex serialization",
      "description": "Uses toHex() method to serialize transactions to hexadecimal string format",
      "max_score": 10
    },
    {
      "name": "Buffer serialization",
      "description": "Uses toBuffer() method to serialize transactions to Buffer format",
      "max_score": 10
    },
    {
      "name": "Transaction parsing",
      "description": "Uses Transaction.fromHex() or Transaction.fromBuffer() static methods to parse serialized transactions back into Transaction objects",
      "max_score": 15
    },
    {
      "name": "Transaction ID",
      "description": "Uses getId() method to calculate the transaction identifier as a hexadecimal string",
      "max_score": 5
    },
    {
      "name": "Transaction hash",
      "description": "Uses getHash() method or accesses the hash property to get the transaction hash as a Buffer",
      "max_score": 5
    }
  ]
}