feiprotocol.wsd

@startuml

interface IUnitroller {
    ' -- inheritance --

    ' -- usingFor --

    ' -- vars --

    ' -- methods --
	+💰enterMarkets()
	+exitMarket()
	+🔍borrowCaps()

}


interface ICERC20Delegator {
    ' -- inheritance --

    ' -- usingFor --

    ' -- vars --

    ' -- methods --
	+💰mint()
	+🔍balanceOf()
	+🔍decimals()
	+💰borrow()
	+accrueInterest()
	+approve()
	+💰redeemUnderlying()

}


interface IETHDelegator {
    ' -- inheritance --

    ' -- usingFor --

    ' -- vars --

    ' -- methods --
	+💰mint()
	+🔍balanceOf()
	+🔍decimals()
	+💰borrow()
	+accrueInterest()
	+approve()
	+💰redeemUnderlying()
	+🔍getCash()

}


class Exploit_Fei_Globals {
    ' -- inheritance --

    ' -- usingFor --

    ' -- vars --
	+{static}[[IUnitroller]] unitroller
	+{static}[[ICERC20Delegator]] fUSDC
	+{static}[[ICERC20Delegator]] fUSDT
	+{static}[[ICERC20Delegator]] fFRAX
	+{static}[[IETHDelegator]] fETH
	+{static}[[IWETH9]] weth
	+{static}[[IERC20]] usdc
	+{static}[[IERC20]] usdt
	+{static}[[IERC20]] frax
	+{static}[[address]] attacker

    ' -- methods --

}


class Exploit_Fei {
    ' -- inheritance --
	{abstract}TestHarness
	{abstract}BalancerFlashloan
	{abstract}Exploit_Fei_Globals

    ' -- usingFor --

    ' -- vars --

    ' -- methods --
	+setUp()
	+test_attack()
	+💰receiveFlashLoan()
	#attackfETH()
	+attack_fUSDC()
	+💰**__constructor__**()
	#log_balances()

}


class Exploiter_Attacker_Minion {
    ' -- inheritance --
	{abstract}Exploit_Fei_Globals

    ' -- usingFor --

    ' -- vars --
	#[[uint256]] mintAmount
	+[[address]] factory

    ' -- methods --
	+**__constructor__**()
	+exploiter_setup_function()
	+mint()
	+borrow()
	+redeemAll()
	+💰**__constructor__**()

}
' -- inheritance / usingFor --
Exploit_Fei --[#DarkGoldenRod]|> TestHarness
Exploit_Fei --[#DarkGoldenRod]|> BalancerFlashloan
Exploit_Fei --[#DarkGoldenRod]|> Exploit_Fei_Globals
Exploiter_Attacker_Minion --[#DarkGoldenRod]|> Exploit_Fei_Globals

@enduml