PriceBoundPSM

contract to create a price bound DAI PSM This contract will allow swaps when the price of DAI is between 98 cents and 1.02 by default These defaults are changeable by the admin and governance by calling floor and ceiling setters setOracleFloor and setOracleCeiling

Functions

constructor

function constructor(
    uint256 _floor,
    uint256 _ceiling,
    struct PegStabilityModule.OracleParams _params,
    uint256 _mintFeeBasisPoints,
    uint256 _redeemFeeBasisPoints,
    uint256 _reservesThreshold,
    uint256 _chiLimitPerSecond,
    uint256 _mintingBufferCap,
    contract IERC20 _underlyingToken,
    contract IPCVDeposit _surplusTarget
) public

constructor

Parameters

Name	Type	Description
_floor	uint256	minimum acceptable oracle price
_ceiling	uint256	maximum acceptable oracle price
_params	struct PegStabilityModule.OracleParams	PSM construction params
_mintFeeBasisPoints	uint256
_redeemFeeBasisPoints	uint256
_reservesThreshold	uint256
_chiLimitPerSecond	uint256
_mintingBufferCap	uint256
_underlyingToken	contract IERC20
_surplusTarget	contract IPCVDeposit

setOracleFloorBasisPoints

function setOracleFloorBasisPoints(
    uint256 newFloorBasisPoints
) external

sets the floor price in BP

Parameters

Name	Type	Description
newFloorBasisPoints	uint256

setOracleCeilingBasisPoints

function setOracleCeilingBasisPoints(
    uint256 newCeilingBasisPoints
) external

sets the ceiling price in BP

Parameters

Name	Type	Description
newCeilingBasisPoints	uint256

isPriceValid

function isPriceValid() external returns (bool)

return wether the current oracle price is valid or not

_setCeilingBasisPoints

function _setCeilingBasisPoints(
    uint256 newCeilingBasisPoints
) internal

helper function to set the ceiling in basis points

Parameters

Name	Type	Description
newCeilingBasisPoints	uint256

_setFloorBasisPoints

function _setFloorBasisPoints(
    uint256 newFloorBasisPoints
) internal

helper function to set the floor in basis points

Parameters

Name	Type	Description
newFloorBasisPoints	uint256

_validPrice

function _validPrice(
    struct Decimal.D256 price
) internal returns (bool valid)

helper function to determine if price is within a valid range

Parameters

Name	Type	Description
price	struct Decimal.D256

_validatePriceRange

function _validatePriceRange(
    struct Decimal.D256 price
) internal

reverts if the price is greater than or equal to the ceiling or less than or equal to the floor

Parameters

Name	Type	Description
price	struct Decimal.D256