Skip to main content

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 Sepolia0xE413363cf8E2dd59ed4A36151CE0e46454B18F88
Base Sepolia0x16E3a83939216b6625A57665209Ff25d470e2D00
Base Mainnet0x65734F47870Fe907367Fab6984228B5810a55211

Functions​

initialize​

function initialize(struct StorageInstance _store) external

domFiPerp​

function domFiPerp() external view returns (contract IDomFiPerp)

updateFunding​

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

function updateFunding(ProductId _productId) external
Dev note

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

Parameters​

NameTypeDescription
_productIdProductIdproduct to update

getFundingRate​

get funding rate for the given product

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

Parameters​

NameTypeDescription
_productIdProductIdproduct 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(ProductId _productId) public view returns (FPUnsigned _interestRate)

Parameters​

NameTypeDescription
_productIdProductIdproduct to get interest rate for

Return Values​

NameTypeDescription
_interestRateFPUnsigned

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(ProductId _productId) external view returns (FPSigned)

Parameters​

NameTypeDescription
_productIdProductIdproduct 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(ProductId _productId) external view returns (FPUnsigned)

Parameters​

NameTypeDescription
_productIdProductIdproduct in question

Return Values​

NameTypeDescription
[0]FPUnsigned

minFundingMultiplier​

function minFundingMultiplier() external view returns (FPUnsigned)

setMinFundingMultiplier​

function setMinFundingMultiplier(FPUnsigned _minFundingMultiplier) external

fundingMultipliers​

function fundingMultipliers(ProductId _productId) external view returns (FPUnsigned)

setFundingMultiplier​

function setFundingMultiplier(ProductId _productId, FPUnsigned _fundingMultiplier) external

baseInterestRates​

function baseInterestRates(ProductId _productId) external view returns (FPUnsigned)

setInterestRate​

function setInterestRate(ProductId _productId, FPUnsigned _interestRate) external

maxInterestRate​

function maxInterestRate() external view returns (FPUnsigned)

setMaxInterestRate​

function setMaxInterestRate(FPUnsigned _maxInterestRate) external

maxFundingRate​

function maxFundingRate() external view returns (FPUnsigned)

setMaxFundingRate​

function setMaxFundingRate(FPUnsigned _maxFundingRate) external

lastUpdateTimes​

function lastUpdateTimes(ProductId _productId) external view returns (uint64)

Events​

FundingUpdated​

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

MinFundingMultiplierSet​

event MinFundingMultiplierSet(FPUnsigned minFundingMultiplier)

FundingMultiplierSet​

event FundingMultiplierSet(ProductId productId, FPUnsigned fundingMultiplier)

BaseInterestRateSet​

event BaseInterestRateSet(ProductId productId, FPUnsigned baseInterestRate)

MaxFundingRateSet​

event MaxFundingRateSet(FPUnsigned maxFundingRate)

MaxInterestRateSet​

event MaxInterestRateSet(FPUnsigned maxInterestRate)

Variables​

funding​