Contract Source Code (Solidity Standard Json-Input format)

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pragma solidity 0.8.0;

interface Sale {
    function viewUserOfferingAmount(address _account) view external returns(uint256);
}

interface Token {
    function transfer(address _to, uint256 _amount) external returns(bool);
}

contract ClaimAggregator {

    Token constant MGH = Token(0x8765b1A0eb57ca49bE7EACD35b24A574D0203656);
    Sale constant add1 = Sale(0x14d9178cdf1cB3F156Da2AcC5b0F2b8D9828028a);
    Sale constant add2 = Sale(0x1F3972f87581C0ea59E0483e14253Ee3afC0889C);
    Sale constant add3 = Sale(0xcF4BC9cA41064E7B47Bce84fec4E1BCD59fbe3C7);

    mapping(address => bool) private hasHarvested;

    event Harvest(address indexed account, uint256 amount);

    function harvest() public {
        require(hasHarvested[msg.sender] == false);
        hasHarvested[msg.sender] = true;
        uint256 amount = calculateAmount(msg.sender);
        require(MGH.transfer(msg.sender, amount));
        emit Harvest(msg.sender, amount);
    }

    function calculateAmount(address _account) private view returns(uint256) {
        return add1.viewUserOfferingAmount(_account) +
               add2.viewUserOfferingAmount(_account) +
               add3.viewUserOfferingAmount(_account);
    }
}

{
  "remappings": [],
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "evmVersion": "istanbul",
  "libraries": {},
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

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[{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Harvest","type":"event"},{"inputs":[],"name":"harvest","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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