StaticRatePolicy

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Inherits: IInterestRatePolicy

Title: StaticRatePolicy

A configurable N-point rate policy.

Stores the rate curve as immutable packed rate points embedded in the bytecode.

The constructor does not validate its inputs: rates and durations must have the same length (1 to 8) and durations must be strictly increasing.

State Variables

lastIndex

uint256 internal immutable lastIndex

rp0

PackedRatePoint public immutable rp0

rp1

PackedRatePoint public immutable rp1

rp2

PackedRatePoint public immutable rp2

rp3

PackedRatePoint public immutable rp3

rp4

PackedRatePoint public immutable rp4

rp5

PackedRatePoint public immutable rp5

rp6

PackedRatePoint public immutable rp6

rp7

PackedRatePoint public immutable rp7

Functions

constructor

constructor(uint128[] memory rates, uint128[] memory durations) ;

Parameters

Name	Type	Description
rates	uint128[]	The rates per second, in WAD.
durations	uint128[]	The durations in seconds (must be strictly increasing).

numPoints

Returns the number of rate points in the policy.

function numPoints() external view returns (uint256);

getRate

Returns the interest rate for the given renewal context.

function getRate(bytes32, bytes32, uint256 renewalPeriodStart, address, address, uint256, uint256, bool)
    public
    view
    virtual
    override
    returns (uint256);

Parameters

Name	Type	Description
<none>	bytes32
<none>	bytes32
renewalPeriodStart	uint256	The renewal period start timestamp (the policy computes the elapsed time internally).
<none>	address
<none>	address
<none>	uint256
<none>	uint256
<none>	bool

Returns

Name	Type	Description
<none>	uint256	rate The interpolated rate per second in WAD at the given elapsed time.

_loadCurve

Materializes the bytecode-immutable rate points into parallel (knots, values) arrays.

function _loadCurve() internal view returns (uint256[] memory knots, uint256[] memory values);

_getPoint

function _getPoint(uint256 i) private view returns (PackedRatePoint);