# Libraries

- [IBorrowingFeesUtils](/developer/technical-reference/contracts/interfaces/libraries/iborrowingfeesutils.md)
- [IOtcUtils](/developer/technical-reference/contracts/interfaces/libraries/iotcutils.md)
- [IPriceAggregatorUtils](/developer/technical-reference/contracts/interfaces/libraries/ipriceaggregatorutils.md)
- [ITriggerRewardsUtils](/developer/technical-reference/contracts/interfaces/libraries/itriggerrewardsutils.md)
- [IFeeTiersUtils](/developer/technical-reference/contracts/interfaces/libraries/ifeetiersutils.md)
- [IPairsStorageUtils](/developer/technical-reference/contracts/interfaces/libraries/ipairsstorageutils.md)
- [IPriceImpactUtils](/developer/technical-reference/contracts/interfaces/libraries/ipriceimpactutils.md)
- [IReferralsUtils](/developer/technical-reference/contracts/interfaces/libraries/ireferralsutils.md)
- [ITradingCallbacksUtils](/developer/technical-reference/contracts/interfaces/libraries/itradingcallbacksutils.md)
- [ITradingCommonUtils](/developer/technical-reference/contracts/interfaces/libraries/itradingcommonutils.md)
- [ITradingInteractionsUtils](/developer/technical-reference/contracts/interfaces/libraries/itradinginteractionsutils.md)
- [ITradingStorageUtils](/developer/technical-reference/contracts/interfaces/libraries/itradingstorageutils.md)
- [IUpdateLeverageUtils](/developer/technical-reference/contracts/interfaces/libraries/iupdateleverageutils.md)
- [IUpdatePositionSizeUtils](/developer/technical-reference/contracts/interfaces/libraries/iupdatepositionsizeutils.md)