LosslessControllerV2

This contract is the gateway contract that connects LERC20 token contracts with all the lossless hack mitigation system.

Contract can be found here:

lossless-v2/contracts/LosslessControllerV2.sol at master · Lossless-Cash/lossless-v2GitHub

Variables

• pauseAdmin

• admin

• recoveryAdmin

• guardian

• tokenProtections

pauseAdmin

This address has the access to pause and unpause controller contract.

admin

This address has access to configure lossless protocol. Can be changed by recoveryAdmin.

recoveryAdmin

This is a super admin's address. This wallet is able to change the regular admin and pause admin. This address is the most powerful admin in the whole lossless protocol and we are using a secure and time tested multi-sig (Gnosis Safe) for it. This variable can be changed using transferRecoveryAdminOwnership function.

guardian

The address of the guardian smart contract. Guardian contract has access to control protection strategies on controller contract.

tokenProtections

This mapping saves info about every address that is protected. It has a flag that shows if the address is protected or not and also has strategy address so that if the address is protected the controller knows which of the protections strategies should be applied.

Events

• AdminChanged(address indexed previousAdmin, address indexed newAdmin)

• RecoveryAdminChanged(address indexed previousAdmin, address indexed newAdmin)

• PauseAdminChanged(address indexed previousAdmin, address indexed newAdmin)

• GuardianSet(address indexed oldGuardian, address indexed newGuardian)

• ProtectedAddressSet(address indexed token, address indexed protectedAddress, address indexed strategy)

• RemovedProtectedAddress(address indexed token, address indexed protectedAddress)

Modifiers

• onlyLosslessRecoveryAdmin

• onlyLosslessAdmin

• onlyPauseAdmin

• onlyGuardian

onlyLosslessRecoveryAdmin

Checks if msg.sender is recoveryAdmin.

onlyLosslessAdmin

Checks if msg.sender is admin.

onlyPauseAdmin

Checks if msg.sender is pauseAdmin.

onlyGuardian

Checks if msg.sender is guardian smart contract.

Functions

• getVersion

• isAddressProtected

• getProtectedAddressStrategy

• pause

• unpause

• setAdmin

• setRecoveryAdmin

• setPauseAdmin

• setGuardian

• setProtectedAddress

• removeProtectedAddress

• beforeTransfer

• beforeTransferFrom

• beforeApprove

• beforeIncreaseAllowance

• beforeDecreaseAllowance

• afterApprove

• afterTransfer

• afterTransferFrom

• afterIncreaseAllowance

• afterDecreaseAllowance

getVersion

function getVersion() external pure returns (uint256)

Returns current version of the controller.

isAddressProtected

function isAddressProtected(address token, address protectedAddress) external view returns (bool)

Returns either true or false depending if the address has any protections set up on it.

Parameters:

getProtectedAddressStrategy

function getProtectedAddressStrategy(address token, address protectedAddress) external view returns (address)

Returns address of the strategy that the protected address is using. If address is not protected returns zero address.

Parameters:

Name	Type	Description
token	address	Token for which the protection is set.
protectedAddress	address	Address to check the protection strategy for.

pause

function pause() external onlyPauseAdmin

Sets the pause flag to true which in turn pauses some of the contracts functionality. Can be called only by the pauseAdmin.

unpause

function unpause() external onlyPauseAdmin

Sets the pause flag to false which in turn unpauses some of the contracts functionality. Can be called only by the pauseAdmin.

setAdmin

function setAdmin(address newAdmin) external onlyLosslessRecoveryAdmin

Sets admin address. Can be called only by recoveryAdmin.

Parameters:

Name	Type	Description
newAdmin	address	New admin address.

setRecoveryAdmin

function setRecoveryAdmin(address newRecoveryAdmin) external onlyLosslessRecoveryAdmin

Sets recoveryAdmin address. Can be called only by recoveryAdmin.

Parameters:

Name	Type	Description
newRecoveryAdmin	address	New recovery admin address.

setPauseAdmin

function setPauseAdmin(address newPauseAdmin) external onlyLosslessRecoveryAdmin

Sets pauseAdmin address. Can be called only by recoveryAdmin.

Parameters:

Name	Type	Description
newPauseAdmin	address	New pause admin address.

setGuardian

function setGuardian(address newGuardian) external onlyLosslessAdmin whenNotPaused

Sets guardian contract's address. Can be called only by admin when contract is not paused.

Parameters:

Name	Type	Description
newGuardian	address	New guardian contract's address.

setProtectedAddress

function setProtectedAddress(address token, address protectedAddresss, ProtectionStrategy strategy) external onlyGuardian whenNotPaused

Sets token scoped protection on an address. Can be called only by the guardian when contract is not paused.

Parameters:

Name	Type	Description
token	address	Token for which the protection rules should be applied.
protectedAddress	address	Address to protect.
strategy	ProtectionStrategy	Strategy address that should be used when protecting the address.

removeProtectedAddress

function removeProtectedAddress(address token, address protectedAddresss) external onlyGuardian whenNotPaused

Removes token scoped protection. Can be called only by guardian contract when contract is not paused.

Parameters:

Name	Type	Description
token	address	Token for which the protection rules should be removed.
protectedAddress	address	Address to remove the protection from.

beforeTransfer

function beforeTransfer(address sender, address recipient, uint256 amount) external 

Hook function that is called before every LERC20 token transfer function. Also does a call to protection strategy in case sender's address is protected.

Parameters:

Name	Type	Description
sender	address	Sender's address.
recipient	address	Recipient's address.
amount	uint256	Amount of tokens being transferred.

beforeTransferFrom

function beforeTransferFrom(address msgSender, address sender, address recipient, uint256 amount) external

Hook function that is called before every LERC20 token transferFrom function. Also does a call to protection strategy in case sender's address is protected.

Parameters:

Name	Type	Description
msgSender	address	Address that triggered transfer from sender's address.
sender	address	Sender's address.
recipient	address	Recipient's address.
amount	uint256	Amount of tokens being transferred.

beforeApprove

function beforeApprove(address sender, address spender, uint256 amount) external

Hook function that is called before every LERC20 token approve function. Does not implement any logic yet.

Parameters:

Name	Type	Description
sender	address	Sender's address.
recipient	address	Recipient's address.
amount	uint256	Amount of tokens being approved.

beforeIncreaseAllowance

function beforeIncreaseAllowance(address msgSender, address spender, uint256 addedValue) external

Hook function that is called before every LERC20 token increaseAllowance function. Does not implement any logic yet.

Parameters:

Name	Type	Description
msgSender	address	Address that triggered increaseAllowance function from spender's address.
spender	address	Spender's address.
addedValue	uint256	How many tokens to add to the already approved amount.

beforeDecreaseAllowance

function beforeDecreaseAllowance(address msgSender, address spender, uint256 subtractedValue) external

Hook function that is called before every LERC20 token decreaseAllowance function. Does not implement any logic yet.

Parameters:

Name	Type	Description
msgSender	address	Address that triggered decreaseAllowance function from spender's address.
spender	address	Spender's address.
subtractValue	uint256	How many tokens to subtract from the already approved amount.

after hooks

• afterApprove

• afterTransfer

• afterTransferFrom

• afterIncreaseAllowance

• afterDecreaseAllowance

These functions are deprecated and do not contain any logic. These functions are kept in the controller because tokens that use older version of LERC20 do calls to these functions. They must be kept on the controller in order not to brick those tokens.