Chancer - Audit

The contract is serving as the underlying entity to interact with one or more third-party protocols. The scope of the audit treats third-party entities as black boxes and assumes their functional correctness. However, in the real world, third parties can be compromised and this may lead to lost or stolen assets. In addition, upgrades of third parties can possibly create severe impacts, such as increasing fees of third parties, migrating to new LP pools, etc. ```solidity=18 address public immutable saleToken; ``` - The contract `CHRPresale` interacts with third party contract with `IERC20` interface via `saleToken`. --- ```solidity=21 IERC20 public immutable usdtToken; ``` - The contract `CHRPresale` interacts with third party contract with `IERC20` interface via `usdtToken`. --- ```solidity=24 IChainlinkPriceFeed public immutable oracle; ``` - The contract `CHRPresale` interacts with third party contract with `IChainlinkPriceFeed` interface via `oracle`. --- ```solidity=136 function rescueERC20(address _tokenAddress, uint256 _amount) external onlyOwner { ``` - The function `CHRPresale.rescueERC20` interacts with third party contract with `IERC20` interface via `_tokenAddress`.