ERC777 Burn implementation interface Ethereum

erc777-burn.sol

/// @notice Burns `_amount` tokens from `_tokenHolder`
///  Sample burn function to showcase the use of the `Burned` event.
/// @param _tokenHolder The address that will lose the tokens
/// @param _amount The quantity of tokens to burn
function burn(address _tokenHolder, uint256 _amount, bytes _userData, bytes _operatorData) public onlyOwner {
    requireMultiple(_amount);
    require(balanceOf(_tokenHolder) >= _amount);

    mBalances[_tokenHolder] = mBalances[_tokenHolder].sub(_amount);
    mTotalSupply = mTotalSupply.sub(_amount);

    Burned(msg.sender, _tokenHolder, _amount, _userData, _operatorData);
    if (mErc20compatible) { Transfer(_tokenHolder, 0x0, _amount); }
}