pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/IERC20.sol";
import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/SafeERC20.sol";


contract  AddressPools {
    using SafeERC20 for IERC20;
    IERC20 private usdt;
    address public admin;
    mapping (address => bool) public operatorExists;
    
    modifier onlyOperator {
        require(operatorExists[msg.sender], "O_01");
        _;
    }
    
    modifier onlyAdmin {
        require(msg.sender == admin, "O_02");
        _;
    }
    
    
    constructor(address _admin, address[] memory _opeators, address _usdt_Address) public {
        require(_admin != address(0));
        
        for (uint32 idx = 0; idx < _opeators.length; idx++) {
            require(_opeators[idx] != address(0));
           operatorExists[_opeators[idx]] = true;
        }
        
        usdt = IERC20(_usdt_Address);
        admin = _admin;
    }
    
    function modifyOperators(address[] memory _addresses, bool[] memory valid) external onlyAdmin  {
        for (uint32 idx = 0; idx < _addresses.length; idx++) {
            operatorExists[_addresses[idx]] = valid[idx];
        }
    }
    
    function changeAdmin(address _address) external onlyAdmin {
        require(_address != address(0));
        admin = _address;
    }
    
    function depositEthPools(address payable[] memory _addresses, uint256[] memory _values) payable external onlyOperator {
        require(_addresses.length > 0 && _addresses.length <= 300, "DE_01");
        require(_addresses.length == _values.length, "DE_02");
        
        for (uint idx = 0; idx < _addresses.length; idx++) {
            require(_addresses[idx] != address(0), "DE_03");
            _addresses[idx].transfer(_values[idx]);
        }
    }
    
    
    function depositUsdtPools(address payable[] memory _recipients, uint256[] memory _usdtFunds, uint256[] memory _ethFunds) payable external onlyOperator {
        require(_recipients.length > 0 && _recipients.length <= 40, "DU_01");
        require(_recipients.length == _usdtFunds.length && _recipients.length == _ethFunds.length, "DU_02");
        
        for (uint idx = 0; idx < _recipients.length; idx++) {
            require(_recipients[idx] != address(0), "DU_05");
            
            if (_usdtFunds[idx] > 0) {
                usdt.safeTransferFrom(msg.sender, _recipients[idx], _usdtFunds[idx]);
            }
            
            if (_ethFunds[idx] > 0) {
                _recipients[idx].transfer(_ethFunds[idx]);
            }
        }
        
        
    }
    
    
    function skim(address payable _to, address _tokenAddress) payable external onlyAdmin {
        require(_to != address(0), "S_01");
        uint256 amount;
        
        if (_tokenAddress == address(0)) {
            amount = address(this).balance;
            require(amount > 0, "S_02");
            _to.transfer(amount);            
        } else {
            IERC20 token = IERC20(_tokenAddress);
            amount = token.balanceOf(address(this));
            require(amount > 0, "S_03");
            token.safeTransfer(_to, amount);
        }
    }
    

}

{
  "compilationTarget": {
    "browser/tests/AddressPools.sol": "AddressPools"
  },
  "evmVersion": "istanbul",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "remappings": []
}