USDFI Dex & Miner - Audit

In the contract `Ownable` the role `_owner` has authority over the functions shown in the diagram below.  In the contract `Ownable` the role `owner` has authority over the functions shown in the diagram below.  In the contract `Pausable` the role `_owner` has authority over the functions shown in the diagram below.  In the contract `Pausable` the role `owner` has authority over the functions shown in the diagram below.  In the contract `STABLE_MINTER` the role `_owner` has authority over the functions shown in the diagram below.  In the contract `STABLE_MINTER` the role `owner` has authority over the functions shown in the diagram below.  In the contract `USDFIFactory` the role `_owner` has authority over the functions shown in the diagram below.  In the contract `USDFIFactory` the role `owner` has authority over the functions shown in the diagram below.  In the contract `USDFIPair` the role `factory` has authority over the functions shown in the diagram below.  In the contract `USDFI_MINTER` the role `_owner` has authority over the functions shown in the diagram below.  In the contract `USDFI_MINTER` the role `owner` has authority over the functions shown in the diagram below.  Any compromise to the privileged accounts may allow the hacker to take advantage of this authority and switch owners, withdraw tokens, and modify critical configurations of the contracts.