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FundingManager

FundingManager​

Funding manager for Domination Finance perpetual exchange

Computes a “funding rate” for products based on open interest, stores an integral, and updates it whenever a position is touched. Also integrates a flat base interest rate. Given a position with a historical snapshot of cumulative funding and interest, the current stored integrals allow DomFiPerp to compute how much the owner owes (or receives).

These rates are intended to incentivize even long/short orders (minimizing LP exposure) and collect fees for LPs.

Addresses​

ChainAddress
Arbitrum Sepolia0x1ecd842199dA19B8673c40dDcC0799491f1D51fA

Functions​

constructor​

constructor() public

updateFunding​

Update cumulative sums with the integral of the current funding and interest rates since last update.

function updateFunding(bytes32 _productId) external
Dev note

Called whenever a product's funding and interest rates change. Only callable by DomFiPerp

Parameters​

NameTypeDescription
_productIdbytes32product to update

getFundingRate​

get funding rate for the given product

function getFundingRate(bytes32 _productId) public view returns (FPSigned fundingRate)

Parameters​

NameTypeDescription
_productIdbytes32product to get funding rate for

Return Values​

NameTypeDescription
fundingRateFPSigned% per year charged for long and paid to short orders

getInterestRate​

get interest rate for the given product

function getInterestRate(bytes32 _productId) public view returns (FPUnsigned interestRate)

Parameters​

NameTypeDescription
_productIdbytes32product to get interest rate for

Return Values​

NameTypeDescription
interestRateFPUnsignedflat % per year charged to both long and short orders

getCumulativeFunding​

Get cumulative funding, as a percent, for a product since it was added. Compare this to a previous cumulative funding value to see the net funding accrued between the two measurements.

function getCumulativeFunding(bytes32 _productId) external view returns (FPSigned)

Parameters​

NameTypeDescription
_productIdbytes32product in question

Return Values​

NameTypeDescription
[0]FPSigned

getCumulativeInterest​

Get cumulative interest, as a percent, for a product since it was added. Compare this to a previous cumulative interest value to see the interest accrued between the two measurements. Note that unlike funding, interest rate is always positive; cumulative interest will never decrease.

function getCumulativeInterest(bytes32 _productId) external view returns (FPUnsigned)

Parameters​

NameTypeDescription
_productIdbytes32product in question

Return Values​

NameTypeDescription
[0]FPUnsigned

setDomFiPerp​

function setDomFiPerp(contract IDomFiPerp _domFiPerp) external

setMinFundingMultiplier​

function setMinFundingMultiplier(FPUnsigned _minFundingMultiplier) external

setFundingMultiplier​

function setFundingMultiplier(bytes32 _productId, FPUnsigned _fundingMultiplier) external

setInterestRate​

function setInterestRate(bytes32 _productId, FPUnsigned _interestRate) external

setMaxInterestRate​

function setMaxInterestRate(FPUnsigned _maxInterestRate) external

setMaxFundingRate​

function setMaxFundingRate(FPUnsigned _maxFundingRate) external

setOwner​

function setOwner(address _owner) external

Events​

FundingUpdated​

event FundingUpdated(
    bytes32 productId,
    FPSigned fundingRate,
    FPSigned fundingChange,
    FPSigned cumulativeFunding,
    FPUnsigned interestRate,
    FPUnsigned interestChange,
    FPUnsigned cumulativeBaseInterests
)

DomFiPerpSet​

event DomFiPerpSet(contract IDomFiPerp domFiPerp)

MinFundingMultiplierSet​

event MinFundingMultiplierSet(FPUnsigned minFundingMultiplier)

FundingMultiplierSet​

event FundingMultiplierSet(bytes32 productId, FPUnsigned fundingMultiplier)

BaseInterestRateSet​

event BaseInterestRateSet(bytes32 productId, FPUnsigned baseInterestRate)

MaxFundingRateSet​

event MaxFundingRateSet(FPUnsigned maxFundingRate)

MaxInterestRateSet​

event MaxInterestRateSet(FPUnsigned maxInterestRate)

UpdateOwner​

event UpdateOwner(address owner)

Modifiers​

onlyOwner​

modifier onlyOwner()

Errors​

PerpOnly​

error PerpOnly()

OwnerOnly​

error OwnerOnly()

Variables​

domFiPerp​

owner​

maxFundingRate​

maxInterestRate​

minFundingMultiplier​

fundingMultipliers​

lastUpdateTimes​

baseInterestRates​