IHaiSafeManager

Functions

safeEngine

Address of the SAFEEngine

function safeEngine() external view returns (address _safeEngine);

safeCan

Mapping of owner and safe permissions to a caller permissions

function safeCan(address _owner, uint256 _safeId, address _caller) external view returns (uint256 _ok);

handlerCan

Mapping of handler to a caller permissions

function handlerCan(address _safeHandler, address _caller) external view returns (uint256 _ok);

getSafes

Getter for the list of safes owned by a user

function getSafes(address _usr) external view returns (uint256[] memory _safes);

Parameters

Name	Type	Description
`_usr`	`address`	Address of the user

Returns

Name	Type	Description
`_safes`	`uint256[]`	List of safe ids owned by the user

getSafes

Getter for the list of safes owned by a user for a given collateral type

function getSafes(address _usr, bytes32 _cType) external view returns (uint256[] memory _safes);

Parameters

Name	Type	Description
`_usr`	`address`	Address of the user
`_cType`	`bytes32`	Bytes32 representation of the collateral type

Returns

Name	Type	Description
`_safes`	`uint256[]`	List of safe ids owned by the user for the given collateral type

getSafesData

Getter for the details of the safes owned by a user

function getSafesData(address _usr)
  external
  view
  returns (uint256[] memory _safes, address[] memory _safeHandlers, bytes32[] memory _cTypes);

Parameters

Name	Type	Description
`_usr`	`address`	Address of the user

Returns

Name	Type	Description
`_safes`	`uint256[]`	List of safe ids owned by the user
`_safeHandlers`	`address[]`	List of safe handlers addresses owned by the user
`_cTypes`	`bytes32[]`	List of collateral types of the safes owned by the user

safeData

Getter for the details of a SAFE

function safeData(uint256 _safe) external view returns (SAFEData memory _sData);

Parameters

Name	Type	Description
`_safe`	`uint256`	Id of the SAFE

Returns

Name	Type	Description
`_sData`	`SAFEData`	Struct with the safe data

allowSAFE

Allow/disallow a user address to manage the safe

function allowSAFE(uint256 _safe, address _usr, uint256 _ok) external;

Parameters

Name	Type	Description
`_safe`	`uint256`	Id of the SAFE
`_usr`	`address`	Address of the user to allow/disallow
`_ok`	`uint256`	Boolean state to allow/disallow

allowHandler

Allow/disallow a handler address to manage the safe

function allowHandler(address _usr, uint256 _ok) external;

Parameters

Name	Type	Description
`_usr`	`address`	Address of the user to allow/disallow
`_ok`	`uint256`	Boolean state to allow/disallow

openSAFE

Open a new safe for a user address

function openSAFE(bytes32 _cType, address _usr) external returns (uint256 _id);

Parameters

Name	Type	Description
`_cType`	`bytes32`	Bytes32 representation of the collateral type
`_usr`	`address`	Address of the user to open the safe for

Returns

Name	Type	Description
`_id`	`uint256`	Id of the new SAFE

transferSAFEOwnership

Transfer the ownership of a safe to a dst address

function transferSAFEOwnership(uint256 _safe, address _dst) external;

Parameters

Name	Type	Description
`_safe`	`uint256`	Id of the SAFE
`_dst`	`address`	Address of the dst address

modifySAFECollateralization

Modify a SAFE's collateralization ratio while keeping the generated COIN or collateral freed in the safe handler address

function modifySAFECollateralization(uint256 _safe, int256 _deltaCollateral, int256 _deltaDebt) external;

Parameters

Name	Type	Description
`_safe`	`uint256`	Id of the SAFE
`_deltaCollateral`	`int256`	Delta of collateral to add/remove [wad]
`_deltaDebt`	`int256`	Delta of debt to add/remove [wad]

transferCollateral

Transfer wad amount of safe collateral from the safe address to a dst address

function transferCollateral(uint256 _safe, address _dst, uint256 _wad) external;

Parameters

Name	Type	Description
`_safe`	`uint256`	Id of the SAFE
`_dst`	`address`	Address of the dst address
`_wad`	`uint256`	Amount of collateral to transfer [wad]

transferCollateral

Transfer wad amount of any type of collateral from the safe address to a dst address

This function has the purpose to take away collateral from the system that doesn't correspond to the safe but was sent there wrongly.

function transferCollateral(bytes32 _cType, uint256 _safe, address _dst, uint256 _wad) external;

Parameters

Name	Type	Description
`_cType`	`bytes32`	Bytes32 representation of the collateral type
`_safe`	`uint256`	Id of the SAFE
`_dst`	`address`	Address of the dst address
`_wad`	`uint256`	Amount of collateral to transfer [wad]

transferInternalCoins

Transfer an amount of COIN from the safe address to a dst address [rad]

function transferInternalCoins(uint256 _safe, address _dst, uint256 _rad) external;

Parameters

Name	Type	Description
`_safe`	`uint256`	Id of the SAFE
`_dst`	`address`	Address of the dst address
`_rad`	`uint256`	Amount of COIN to transfer [rad]

quitSystem

Quit the system, migrating the safe (lockedCollateral, generatedDebt) to a different dst handler

function quitSystem(uint256 _safe, address _dst) external;

Parameters

Name	Type	Description
`_safe`	`uint256`	Id of the SAFE
`_dst`	`address`	Address of the dst handler

enterSystem

Enter the system, migrating the safe (lockedCollateral, generatedDebt) from a src handler to the safe handler

function enterSystem(address _src, uint256 _safe) external;

Parameters

Name	Type	Description
`_src`	`address`	Address of the src handler
`_safe`	`uint256`	Id of the SAFE

moveSAFE

Move a position from safeSrc handler to the safeDst handler

function moveSAFE(uint256 _safeSrc, uint256 _safeDst) external;

Parameters

Name	Type	Description
`_safeSrc`	`uint256`	Id of the source SAFE
`_safeDst`	`uint256`	Id of the destination SAFE

addSAFE

Add a safe to the user's list of safes (doesn't set safe ownership)

This function is meant to allow the user to add a safe to their list (if it was previously removed)

function addSAFE(uint256 _safe) external;

Parameters

Name	Type	Description
`_safe`	`uint256`	Id of the SAFE

removeSAFE

Remove a safe from the user's list of safes (doesn't erase safe ownership)

This function is meant to allow the user to remove a safe from their list (if it was added against their will)

function removeSAFE(uint256 _safe) external;

Parameters

Name	Type	Description
`_safe`	`uint256`	Id of the SAFE

protectSAFE

Choose a safe saviour inside LiquidationEngine for the SAFE

function protectSAFE(uint256 _safe, address _liquidationEngine, address _saviour) external;

Parameters

Name	Type	Description
`_safe`	`uint256`	Id of the SAFE
`_liquidationEngine`	`address`	Address of the LiquidationEngine
`_saviour`	`address`	Address of the saviour

Events

AllowSAFE

Emitted when calling allowSAFE with the sender address and the method arguments

event AllowSAFE(address indexed _sender, uint256 indexed _safe, address _usr, uint256 _ok);

AllowHandler

Emitted when calling allowHandler with the sender address and the method arguments

event AllowHandler(address indexed _sender, address _usr, uint256 _ok);

TransferSAFEOwnership

Emitted when calling transferSAFEOwnership with the sender address and the method arguments

event TransferSAFEOwnership(address indexed _sender, uint256 indexed _safe, address _dst);

OpenSAFE

Emitted when calling openSAFE with the sender address and the method arguments

event OpenSAFE(address indexed _sender, address indexed _own, uint256 indexed _safe);

ModifySAFECollateralization

Emitted when calling modifySAFECollateralization with the sender address and the method arguments

event ModifySAFECollateralization(
  address indexed _sender, uint256 indexed _safe, int256 _deltaCollateral, int256 _deltaDebt
);

TransferCollateral

Emitted when calling transferCollateral with the sender address and the method arguments

event TransferCollateral(address indexed _sender, uint256 indexed _safe, address _dst, uint256 _wad);

TransferCollateral

Emitted when calling transferCollateral (specifying cType) with the sender address and the method arguments

event TransferCollateral(address indexed _sender, bytes32 _cType, uint256 indexed _safe, address _dst, uint256 _wad);

TransferInternalCoins

Emitted when calling transferInternalCoins with the sender address and the method arguments

event TransferInternalCoins(address indexed _sender, uint256 indexed _safe, address _dst, uint256 _rad);

QuitSystem

Emitted when calling quitSystem with the sender address and the method arguments

event QuitSystem(address indexed _sender, uint256 indexed _safe, address _dst);

EnterSystem

Emitted when calling enterSystem with the sender address and the method arguments

event EnterSystem(address indexed _sender, address _src, uint256 indexed _safe);

MoveSAFE

Emitted when calling moveSAFE with the sender address and the method arguments

event MoveSAFE(address indexed _sender, uint256 indexed _safeSrc, uint256 indexed _safeDst);

ProtectSAFE

Emitted when calling protectSAFE with the sender address and the method arguments

event ProtectSAFE(address indexed _sender, uint256 indexed _safe, address _liquidationEngine, address _saviour);

Errors

ZeroAddress

Throws if the provided address is null

error ZeroAddress();

SafeNotAllowed

Throws when trying to call a function not allowed for a given safe

error SafeNotAllowed();

HandlerNotAllowed

Throws when trying to call a function not allowed for a given handler

error HandlerNotAllowed();

AlreadySafeOwner

Throws when trying to transfer safe ownership to the current owner

error AlreadySafeOwner();

CollateralTypesMismatch

Throws when trying to move a safe to another one with different collateral type

error CollateralTypesMismatch();

Structs

SAFEData

struct SAFEData {
  address owner;
  address safeHandler;
  bytes32 collateralType;
}