burn-and-prosope.sol

import "./ERC20.sol";

interface ApproveAndCallReceiver {
    function receiveApproval(address _from, uint256 _amount, address _token, bytes memory _data) public;
}

contract BurnAndPropose is ApproveAndCallReceiver {
    ERC20 constant public ANT = ERC20(0x960b236A07cf122663c4303350609A66A7B288C0);
    address public voting;
    uint256 public burn;

    constructor (address _voting, uint256 _burn) public {
        voting = _voting;
        burn = _burn;
    }

    function receiveApproval(address _from, uint256 _amount, address _token, bytes memory _data) public {
        require(msg.sender == address(ANT) && _token == address(ANT));
        require(_amount == burn);
        
        ANT.transferFrom(_from, address(0xdead), burn);
        require(voting.call(_data));
    }
}