[
  {
    "id": "t1_sample_1",
    "task_id": "task_1_best_practices",
    "source_path": "data/samples/task1/missing_spdx.sol",
    "metadata": {
      "contract_name": "NoSpdx",
      "compiler_version": "0.7.6",
      "file_path": "missing_spdx.sol"
    },
    "labels": [
      {
        "issue_type": "missing_spdx",
        "line_number": 1,
        "description": "Missing SPDX license identifier",
        "severity": "Low"
      },
      {
        "issue_type": "old_compiler_version",
        "line_number": 2,
        "description": "Compiler version below 0.8.x",
        "severity": "Low"
      }
    ]
  },
  {
    "id": "t1_sample_2",
    "task_id": "task_1_best_practices",
    "source_path": "data/samples/task1/missing_natspec.sol",
    "metadata": {
      "contract_name": "NoNatSpec",
      "compiler_version": "0.8.13",
      "file_path": "missing_natspec.sol"
    },
    "labels": [
      {
        "issue_type": "missing_natspec",
        "line_number": 6,
        "description": "Public function missing NatSpec comment",
        "severity": "Low"
      }
    ]
  },
  {
    "id": "t1_sample_3",
    "task_id": "task_1_best_practices",
    "source_path": "data/samples/task1/deprecated_constructor.sol",
    "metadata": {
      "contract_name": "LegacyConstructor",
      "compiler_version": "0.4.24",
      "file_path": "deprecated_constructor.sol"
    },
    "labels": [
      {
        "issue_type": "deprecated_constructor",
        "line_number": 6,
        "description": "Constructor uses deprecated syntax",
        "severity": "Low"
      },
      {
        "issue_type": "old_compiler_version",
        "line_number": 2,
        "description": "Compiler version below 0.8.x",
        "severity": "Low"
      }
    ]
  },
  {
    "id": "t1_sample_4",
    "task_id": "task_1_best_practices",
    "source_path": "data/samples/task1/old_pragma.sol",
    "metadata": {
      "contract_name": "OldPragma",
      "compiler_version": "0.4.25",
      "file_path": "old_pragma.sol"
    },
    "labels": [
      {
        "issue_type": "old_compiler_version",
        "line_number": 2,
        "description": "Compiler version below 0.8.x",
        "severity": "Low"
      },
      {
        "issue_type": "deprecated_constructor",
        "line_number": 13,
        "description": "Constructor uses deprecated syntax",
        "severity": "Low"
      },
      {
        "issue_type": "missing_natspec",
        "line_number": 7,
        "description": "Public function missing NatSpec comment",
        "severity": "Low"
      }
    ]
  },
  {
    "id": "t1_sample_5",
    "task_id": "task_1_best_practices",
    "source_path": "data/samples/task1/missing_events.sol",
    "metadata": {
      "contract_name": "NoEvents",
      "compiler_version": "0.8.19",
      "file_path": "missing_events.sol"
    },
    "labels": [
      {
        "issue_type": "missing_spdx",
        "line_number": 1,
        "description": "Missing SPDX license identifier",
        "severity": "Low"
      },
      {
        "issue_type": "missing_events",
        "line_number": 16,
        "description": "State changing function should emit events",
        "severity": "Low"
      },
      {
        "issue_type": "missing_events",
        "line_number": 22,
        "description": "State changing function should emit events",
        "severity": "Low"
      }
    ]
  },
  {
    "id": "t1_sample_6",
    "task_id": "task_1_best_practices",
    "source_path": "data/samples/task1/unused_variables.sol",
    "metadata": {
      "contract_name": "UnusedImports",
      "compiler_version": "0.8.20",
      "file_path": "unused_variables.sol"
    },
    "labels": [
      {
        "issue_type": "unused_variables",
        "line_number": 8,
        "description": "Unused state variables waste gas",
        "severity": "Low"
      },
      {
        "issue_type": "unused_variables",
        "line_number": 9,
        "description": "Unused state variables waste gas",
        "severity": "Low"
      },
      {
        "issue_type": "unused_variables",
        "line_number": 10,
        "description": "Unused state variables waste gas",
        "severity": "Low"
      }
    ]
  },
  {
    "id": "t2_sample_1",
    "task_id": "task_2_gas_optimization",
    "source_path": "data/samples/task2/inefficient_loop.sol",
    "metadata": {
      "contract_name": "LoopGas",
      "compiler_version": "0.8.17",
      "file_path": "inefficient_loop.sol"
    },
    "labels": [
      {
        "issue_type": "unbounded_loop",
        "line_number": 10,
        "description": "Loop uses dynamic array length without bounds",
        "severity": "Medium"
      }
    ]
  },
  {
    "id": "t2_sample_2",
    "task_id": "task_2_gas_optimization",
    "source_path": "data/samples/task2/redundant_storage.sol",
    "metadata": {
      "contract_name": "StorageGas",
      "compiler_version": "0.8.19",
      "file_path": "redundant_storage.sol"
    },
    "labels": [
      {
        "issue_type": "redundant_storage_read",
        "line_number": 12,
        "description": "Repeated storage reads could be cached",
        "severity": "Medium"
      }
    ]
  },
  {
    "id": "t2_sample_3",
    "task_id": "task_2_gas_optimization",
    "source_path": "data/samples/task2/require_string.sol",
    "metadata": {
      "contract_name": "RequireString",
      "compiler_version": "0.8.18",
      "file_path": "require_string.sol"
    },
    "labels": [
      {
        "issue_type": "custom_error_missing",
        "line_number": 6,
        "description": "Custom errors are preferred over require strings",
        "severity": "Low"
      }
    ]
  },
  {
    "id": "t2_sample_4",
    "task_id": "task_2_gas_optimization",
    "source_path": "data/samples/task2/poor_packing.sol",
    "metadata": {
      "contract_name": "PackingIssues",
      "compiler_version": "0.8.19",
      "file_path": "poor_packing.sol"
    },
    "labels": [
      {
        "issue_type": "poor_struct_packing",
        "line_number": 6,
        "description": "Struct fields should be packed to minimize storage slots",
        "severity": "Medium"
      }
    ]
  },
  {
    "id": "t2_sample_5",
    "task_id": "task_2_gas_optimization",
    "source_path": "data/samples/task2/unchecked_math.sol",
    "metadata": {
      "contract_name": "InlineAssemblyGas",
      "compiler_version": "0.8.19",
      "file_path": "unchecked_math.sol"
    },
    "labels": [
      {
        "issue_type": "redundant_storage_read",
        "line_number": 9,
        "description": "Multiple storage reads should be cached",
        "severity": "Medium"
      },
      {
        "issue_type": "redundant_storage_read",
        "line_number": 19,
        "description": "Storage read in loop should be cached",
        "severity": "Medium"
      },
      {
        "issue_type": "unchecked_math_opportunity",
        "line_number": 9,
        "description": "Safe math operations could use unchecked block",
        "severity": "Low"
      }
    ]
  },
  {
    "id": "t2_sample_6",
    "task_id": "task_2_gas_optimization",
    "source_path": "data/samples/task2/expensive_operations.sol",
    "metadata": {
      "contract_name": "ExpensiveOperations",
      "compiler_version": "0.8.19",
      "file_path": "expensive_operations.sol"
    },
    "labels": [
      {
        "issue_type": "expensive_operation_in_loop",
        "line_number": 11,
        "description": "Expensive exponentiation operation in loop",
        "severity": "Medium"
      },
      {
        "issue_type": "inefficient_string_concat",
        "line_number": 20,
        "description": "String concatenation in loop is gas inefficient",
        "severity": "Medium"
      }
    ]
  },
  {
    "id": "t3_sample_1",
    "task_id": "task_3_security",
    "source_path": "data/samples/task3/reentrancy.sol",
    "metadata": {
      "contract_name": "Reentry",
      "compiler_version": "0.8.20",
      "file_path": "reentrancy.sol"
    },
    "labels": [
      {
        "issue_type": "reentrancy",
        "line_number": 13,
        "description": "State update after external call allows reentrancy",
        "severity": "Critical",
        "exploit_path": "Attacker deploys malicious contract with fallback function that calls withdraw() recursively before balance is updated, draining contract funds",
        "recommended_fix": "Use checks-effects-interactions pattern: update balance before external call or implement ReentrancyGuard"
      }
    ]
  },
  {
    "id": "t3_sample_2",
    "task_id": "task_3_security",
    "source_path": "data/samples/task3/missing_access_control.sol",
    "metadata": {
      "contract_name": "Admin",
      "compiler_version": "0.8.20",
      "file_path": "missing_access_control.sol"
    },
    "labels": [
      {
        "issue_type": "missing_access_control",
        "line_number": 9,
        "description": "Sensitive function lacks access control",
        "severity": "Critical",
        "exploit_path": "Any user can call setAdmin() function to grant themselves admin privileges and control the contract",
        "recommended_fix": "Add onlyOwner modifier to restrict access to sensitive functions"
      }
    ]
  },
  {
    "id": "t3_sample_3",
    "task_id": "task_3_security",
    "source_path": "data/samples/task3/tx_origin_auth.sol",
    "metadata": {
      "contract_name": "OriginAuth",
      "compiler_version": "0.8.20",
      "file_path": "tx_origin_auth.sol"
    },
    "labels": [
      {
        "issue_type": "tx_origin_auth",
        "line_number": 11,
        "description": "Authorization uses tx.origin",
        "severity": "Critical",
        "exploit_path": "Attacker tricks legitimate user into calling malicious contract that forwards calls to this contract, bypassing tx.origin check",
        "recommended_fix": "Replace tx.origin with msg.sender for proper authentication"
      }
    ]
  },
  {
    "id": "t3_sample_4",
    "task_id": "task_3_security",
    "source_path": "data/samples/task3/integer_overflow.sol",
    "metadata": {
      "contract_name": "IntegerOverflow",
      "compiler_version": "0.8.20",
      "file_path": "integer_overflow.sol"
    },
    "labels": [
      {
        "issue_type": "integer_overflow_risk",
        "line_number": 11,
        "description": "Potential integer underflow without checks",
        "severity": "Medium"
      },
      {
        "issue_type": "integer_overflow_risk",
        "line_number": 17,
        "description": "Potential integer overflow without checks",
        "severity": "Medium"
      }
    ]
  },
  {
    "id": "t3_sample_5",
    "task_id": "task_3_security",
    "source_path": "data/samples/task3/unsafe_delegatecall.sol",
    "metadata": {
      "contract_name": "UnsafeDelegateCall",
      "compiler_version": "0.8.20",
      "file_path": "unsafe_delegatecall.sol"
    },
    "labels": [
      {
        "issue_type": "unsafe_delegatecall",
        "line_number": 15,
        "description": "Delegatecall without proper validation",
        "severity": "Critical"
      },
      {
        "issue_type": "unsafe_delegatecall",
        "line_number": 20,
        "description": "Unrestricted delegatecall in fallback function",
        "severity": "Critical"
      }
    ]
  },
  {
    "id": "t3_sample_6",
    "task_id": "task_3_security",
    "source_path": "data/samples/task3/weak_randomness.sol",
    "metadata": {
      "contract_name": "RandomnessVulnerability",
      "compiler_version": "0.8.20",
      "file_path": "weak_randomness.sol"
    },
    "labels": [
      {
        "issue_type": "weak_randomness",
        "line_number": 9,
        "description": "Randomness using predictable block properties",
        "severity": "Critical"
      },
      {
        "issue_type": "weak_randomness",
        "line_number": 22,
        "description": "Predictable block hash usage",
        "severity": "Medium"
      }
    ]
  },
  {
    "id": "t4_sample_1",
    "task_id": "task_4_comprehensive_audit",
    "source_path": "data/samples/task1/old_pragma.sol",
    "metadata": {
      "contract_name": "OldPragma",
      "compiler_version": "0.4.25",
      "file_path": "old_pragma.sol"
    },
    "labels": [
      {
        "issue_type": "old_compiler_version",
        "line_number": 2,
        "description": "Compiler version below 0.8.x",
        "severity": "Low"
      }
    ]
  },
  {
    "id": "t4_sample_2",
    "task_id": "task_4_comprehensive_audit",
    "source_path": "data/samples/task2/inefficient_loop.sol",
    "metadata": {
      "contract_name": "LoopGas",
      "compiler_version": "0.8.17",
      "file_path": "inefficient_loop.sol"
    },
    "labels": [
      {
        "issue_type": "unbounded_loop",
        "line_number": 10,
        "description": "Loop uses dynamic array length without bounds",
        "severity": "Medium"
      }
    ]
  },
  {
    "id": "t4_sample_3",
    "task_id": "task_4_comprehensive_audit",
    "source_path": "data/samples/task3/tx_origin_auth.sol",
    "metadata": {
      "contract_name": "OriginAuth",
      "compiler_version": "0.8.20",
      "file_path": "tx_origin_auth.sol"
    },
    "labels": [
      {
        "issue_type": "tx_origin_auth",
        "line_number": 11,
        "description": "Authorization uses tx.origin",
        "severity": "Critical"
      }
    ]
  }
]