[
  {
    "constant": true,
    "inputs": [],
    "name": "getCurrentBlockTimestamp",
    "outputs": [{ "name": "timestamp", "type": "uint256" }],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
  {
    "constant": false,
    "inputs": [
      {
        "components": [
          { "name": "target", "type": "address" },
          { "name": "callData", "type": "bytes" }
        ],
        "name": "calls",
        "type": "tuple[]"
      }
    ],
    "name": "aggregate",
    "outputs": [
      { "name": "blockNumber", "type": "uint256" },
      { "name": "returnData", "type": "bytes[]" }
    ],
    "payable": false,
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [],
    "name": "getLastBlockHash",
    "outputs": [{ "name": "blockHash", "type": "bytes32" }],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [{ "name": "addr", "type": "address" }],
    "name": "getEthBalance",
    "outputs": [{ "name": "balance", "type": "uint256" }],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [],
    "name": "getCurrentBlockDifficulty",
    "outputs": [{ "name": "difficulty", "type": "uint256" }],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [],
    "name": "getCurrentBlockGasLimit",
    "outputs": [{ "name": "gaslimit", "type": "uint256" }],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [],
    "name": "getCurrentBlockCoinbase",
    "outputs": [{ "name": "coinbase", "type": "address" }],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [{ "name": "blockNumber", "type": "uint256" }],
    "name": "getBlockHash",
    "outputs": [{ "name": "blockHash", "type": "bytes32" }],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  }
]