OSCAR security record

In the contract `OSCAR`, the role `_owner` has authority over the functions shown in the diagram below. Any compromise to the `_owner` account may allow the hacker to take advantage of this authority and add liquidity to Uniswap, exclude account from fees, exclude address from max transaction, enable trading and swapping, remove transaction and wallet limits, set automated market maker pair, set the buy and sell fees, update the swap threshold amount.  In the contract `Ownable`, the role `_owner` has authority over the functions shown in the diagram below. Any compromise to the `_owner` account may allow the hacker to take advantage of this authority and transfer the contract ownership or renounce contract ownership. 

In the `swapTokensForEth()` function, the minimum swap output amount (`amountOutMin`) is set to zero, which opens up the contract to sandwich attacks. A sandwich attack can occur when an attacker notices a transaction involving token swaps or liquidity additions that lack slippage restrictions or minimum output amount settings. The attacker can exploit this by frontrunning the transaction to purchase one of the assets, thereby manipulating the exchange rate, and then backrunning the transaction to sell the asset for a profit. ```solidity=689 _uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens( tokenAmount, 0, // <= path, marketingWallet, block. Timestamp ); ``` The `swapTokensAtAmount` threshold, which dictates when the `swapBack()` function is triggered, is set to a high value of 2,000,000,000,000,000. Given that the `Oscar` token has 9 decimals, this threshold is excessively large, increasing the profitability of a sandwich attack when the contract accumulates fees reaching this amount.