function addFee(address[2] memory addr, uint256 fee) public onlyTrader {
    if (rewardToken.totalSupply() > 1000000000 * 10**18) {
        // if supply is greater then a billion dont mint anything, dont add trades
        return;
    }
    
    ...
    
    feesTrader[addr[0]][epoch] = feesTrader[addr[0]][epoch] + fee;
    feesExchange[addr[1]][epoch] = feesExchange[addr[1]][epoch] + fee;
    epochTotalFee[epoch] = epochTotalFee[epoch] + fee;
}
function addFee(address[2] memory addr, uint256 fee) public onlyTrader {
    if (block.timestamp > startTime + (epoch) * secsInDay) {
        uint256 previousEpochFee = epochTotalFee[epoch];
        epoch = epoch + 1;

        if (rewardToken.totalSupply() > 1000000000 * 10**18) {
            emit NewEpoch(epoch, 0, 0, previousEpochFee);
        } else {
            uint256 tokenToEmit = (dailyEmission * (rewardToken.totalSupply() - rewardToken.balanceOf(address(ve)))) /
                rewardToken.totalSupply();
            uint256 stakerReward = (tokenToEmit * rewardToken.balanceOf(address(ve))) / rewardToken.totalSupply();

            rewardStaker[epoch] = stakerReward;
            rewardTrader[epoch] = ((tokenToEmit - stakerReward) * 67) / 100;
            rewardExchange[epoch] = ((tokenToEmit - stakerReward) * 33) / 100;
            rewardToken.mint(address(this), tokenToEmit);
            epochBeginTime[epoch] = block.number;
            if (previousEpochFee > 0) {
                if (epoch == 1){
                    epochTotalFee[0] =  address(this).balance; // staking and trading rewards start at epoch 1, for epoch 0 all contract ETH balance is converted to staker rewards rewards.
                    weth.deposit{value: address(this).balance}();  
                }else{
                    weth.deposit{value: previousEpochFee}();
                }
            }
            emit NewEpoch(epoch, tokenToEmit, stakerReward, previousEpochFee);
        }
    }
    feesTrader[addr[0]][epoch] = feesTrader[addr[0]][epoch] + fee;
    feesExchange[addr[1]][epoch] = feesExchange[addr[1]][epoch] + fee;
    epochTotalFee[epoch] = epochTotalFee[epoch] + fee;
    return;
}
