[
    {
        "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"
    }
]