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// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity =0.7.6;
pragma abicoder v2;

/// @notice A fork of Multicall2 specifically tailored for the Donaswap Interface
contract DonaswapInterfaceMulticall {
    struct Call {
        address target;
        uint256 gasLimit;
        bytes callData;
    }

    struct Result {
        bool success;
        uint256 gasUsed;
        bytes returnData;
    }

    function getCurrentBlockTimestamp() public view returns (uint256 timestamp) {
        timestamp = block.timestamp;
    }

    function getEthBalance(address addr) public view returns (uint256 balance) {
        balance = addr.balance;
    }

    function multicall(Call[] memory calls) public returns (uint256 blockNumber, Result[] memory returnData) {
        blockNumber = block.number;
        returnData = new Result[](calls.length);
        for (uint256 i = 0; i < calls.length; i++) {
            (address target, uint256 gasLimit, bytes memory callData) =
                (calls[i].target, calls[i].gasLimit, calls[i].callData);
            uint256 gasLeftBefore = gasleft();
            (bool success, bytes memory ret) = target.call{gas: gasLimit}(callData);
            uint256 gasUsed = gasLeftBefore - gasleft();
            returnData[i] = Result(success, gasUsed, ret);
        }
    }
}

{
  "evmVersion": "istanbul",
  "optimizer": {
    "enabled": true,
    "runs": 1000000
  },
  "metadata": {
    "bytecodeHash": "none"
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

[{"inputs":[],"name":"getCurrentBlockTimestamp","outputs":[{"internalType":"uint256","name":"timestamp","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"addr","type":"address"}],"name":"getEthBalance","outputs":[{"internalType":"uint256","name":"balance","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"target","type":"address"},{"internalType":"uint256","name":"gasLimit","type":"uint256"},{"internalType":"bytes","name":"callData","type":"bytes"}],"internalType":"struct DonaswapInterfaceMulticall.Call[]","name":"calls","type":"tuple[]"}],"name":"multicall","outputs":[{"internalType":"uint256","name":"blockNumber","type":"uint256"},{"components":[{"internalType":"bool","name":"success","type":"bool"},{"internalType":"uint256","name":"gasUsed","type":"uint256"},{"internalType":"bytes","name":"returnData","type":"bytes"}],"internalType":"struct DonaswapInterfaceMulticall.Result[]","name":"returnData","type":"tuple[]"}],"stateMutability":"nonpayable","type":"function"}]

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