The price of rsEHT could be manipulated by the first staker

```trancheTokenAmount``` should be rounded UP when proceeding to a withdrawal or previewing a withdrawal.

Malicious/Compromised organiser can reclaw all funds, stealing work from supporters

Centralization Risk for trusted organizers

Sandwich attack to steal all ERC-20 tokens in the Fees contract

Fee on transfer tokens will cause users to lose funds

Single-step process for critical ownership transfer is risky

Lender fails to giveLoan because of inconsistent length between `loadIds` and `poolIds`

Rounding error risk in borrow() function in Lender.sol

staleCheckLatestRoundData() does not check the status of the Arbitrum sequencer in Chainlink feeds.

Chainlink oracle will return the wrong price if the aggregator hits `minAnswer`

Too many DSC tokens can get minted for fee-on-transfer tokens.

Zero address check for tokens

Removed vault cannot be added again

Missing transaction expiration check result in reward tokens selling at a lower price

First depositor can break minting of shares

Use of deprecated chainlink function

Missing checks for whether Arbitrum Sequencer is active

Have to be approved to zero first

Wrong check in mintPlayers() function allows mint more players

FootiumClub NFT can be locked when calling _mint function to mint it to a contract that does not support ERC721 protocol

Residual ETH unreachable and unuitilized in SafEth.sol