Crypto-ERC20-DevToken-Stake-V3.0

    /**
    * @notice
    * Stake is used to make a stake for an sender. It will remove the amount staked from the stakers account and place those tokens inside a stake container
    * StakeID 
    */
    function stake(uint256 _stake) public{
        // Simple check so that user does not stake 0 
        require(_stake > 0, "Cannot stake nothing");
        // Make sure staker actually is good for it
        require(_stake < balanceOf(msg.sender), "Cannot stake more than you own");

        // Mappings in solidity creates all values, but empty, so we can just check the address
        uint256 index = stakeHolders[msg.sender];
        // block.timestamp = timestamp of the current block in seconds since the epoch
        uint256 timestamp = block.timestamp;
        // See if the staker already has a staked index or if its the first time
        if(index == 0){
            // This stakeholder stakes for the first time
            // We need to add him to the stakeHolders and also map it into the Index of the stakes
            // The index would be length of stakes +1 
            // Also make sure its not the FIRST staker, because we cant do stakes.length-1 on that
            index = stakes.length-1;

        }
        // Add index to the stakeHolders
        stakeHolders[msg.sender] = index;
        // Burn the amount of tokens on the sender
        _burn(msg.sender, _stake);
        

        // Use the index to push a new Stake
        // push a newly created Stake with the current block timestamp.
        stakes[index].push(Stake(msg.sender, _stake, timestamp, 0));
        // Emit an event that the stake has occured
        emit Staked(msg.sender, _stake, stakes[index].length-1,timestamp);
    }