Single-step process for critical ownership transfer is risky

Some ERC20 tokens would revert on zero value fee transfers.

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

+= and -= are more expensive

The `for loops` inside the borrow(), repay(), giveLoan() & startAuction() functions in Lender contract are probably gas-guzzlers

Uncheck Arithmetic where overflow/underflow impossible

Use of magic numbers

Use if + custom errors instead of using require + string

Mixed usage of `int`/`uint` with `int256`/`uint256`

Unwanted gas expenditure by recomputing already computed value

Function Name Optimization

`++i`/`i++` should be `unchecked{++i}`/`unchecked{i++}` when it is not possible for them to overflow, as is the case when used in `for`- and `while`-loops