Algebra Integral
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  • Algebra Integral / Technical Reference
    • ℹ️Intro
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      • Specification and API of contracts
        • Algebra Pool
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  • ⬆️Changes v1.2.1
  • Algebra V1 / Technical Reference
    • 🔏Contracts
      • API Reference v1.0
        • V1.0 - Core
          • AlgebraFactory
          • AlgebraPool
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          • DataStorage
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          • IAlgebraFactory
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          • AlgebraEternalFarming
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          • IAlgebraVirtualPoolBase
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          • IPoolInitializer
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          • Multicall
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      • API Reference v1.9
        • V1.9 - Core
          • AlgebraFactory
          • AlgebraPool
          • AlgebraPoolDeployer
          • DataStorage
          • DataStorageOperator
          • IAlgebraFactory
          • IAlgebraFlashCallback
          • IAlgebraMintCallback
          • IAlgebraPoolActions
          • IAlgebraPoolDeployer
          • IAlgebraPoolDerivedState
          • IAlgebraPoolEvents
          • IAlgebraPoolImmutables
          • IAlgebraPoolPermissionedActions
          • IAlgebraPoolState
          • IAlgebraSwapCallback
          • IAlgebraVirtualPool
          • IDataStorageOperator
          • IERC20Minimal
          • PoolImmutables
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        • V1.9 - Periphery
          • ERC721Permit
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          • IERC20Metadata
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          • IMulticall
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        • V1.9 - Tokenomics
          • AlgebraFarming
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      • API Reference v1.9 - Directional Fees
        • V1.9 (Directional Fees) - Core
          • AlgebraFactory
          • AlgebraPool
          • AlgebraPoolDeployer
          • DataStorage
          • DataStorageOperator
          • IAlgebraFactory
          • IAlgebraFlashCallback
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          • IAlgebraPoolActions
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        • V1.9 (Directional Fees) - Periphery
          • AlgebraInterfaceMulticall
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        • V1.9 (Directional Fees) - Tokenomics
          • AlgebraFarming
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          • IERC20Minimal
          • IFarmingCenterVault
          • IFarmingCenter
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      • API Reference v2.0
        • V2.0 - Core
          • AlgebraCommunityVault
          • AlgebraFactory
          • AlgebraFeeConfiguration
          • AlgebraPool
          • AlgebraPoolBase
          • AlgebraPoolDeployer
          • DataStorage
          • DataStorageOperator
          • DerivedState
          • IAlgebraFactory
          • IAlgebraFlashCallback
          • IAlgebraMintCallback
          • IAlgebraPoolActions
          • IAlgebraPoolDeployer
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        • V2.0 - Periphery
          • AlgebraInterfaceMulticall
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          • ILimitOrderManager
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          • LimitOrderManager
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          • Multicall
          • NFTDescriptor
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          • PeripheryImmutableState
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        • V2.0 - Tokenomics
          • AlgebraEternalFarming
          • EternalVirtualPool
          • FarmingCenter
          • IAccessControl
          • IAlgebraEternalFarming
          • IAlgebraEternalVirtualPool
          • IFarmingCenter
          • IncentiveKey
          • VirtualTickStructure
      • API Reference v2.0 - Directional Fees
        • V2.0 (Directional Fees) - Core
          • AlgebraCommunityVault
          • AlgebraFactory
          • AlgebraFeeConfiguration
          • AlgebraPool
          • AlgebraPoolBase
          • AlgebraPoolDeployer
          • DataStorage
          • DataStorageOperator
          • DerivedState
          • IAlgebraFactory
          • IAlgebraFlashCallback
          • IAlgebraMintCallback
          • IAlgebraPoolActions
          • IAlgebraPoolDeployer
          • IAlgebraPoolDerivedState
          • IAlgebraPoolErrors
          • IAlgebraPoolEvents
          • IAlgebraPoolImmutables
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          • IAlgebraPoolState
          • IAlgebraSwapCallback
          • IAlgebraVirtualPool
          • IDataStorageOperator
          • IERC20Minimal
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        • V2.0 (Directional Fees) - Periphery
          • AlgebraInterfaceMulticall
          • ERC721Permit
          • IERC20Metadata
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          • IERC721Permit
          • IERC1271
          • ILimitOrderManager
          • IMulticall
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          • INonfungibleTokenPositionDescriptor
          • IPeripheryImmutableState
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          • IPeripheryPaymentsWithFee
          • IPoolInitializer
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          • ITickLens
          • IV3Migrator
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          • LimitOrderManagement
          • LimitOrderManager
          • LiquidityManagement
          • Multicall
          • NFTDescriptor
          • NonfungiblePositionManager
          • NonfungibleTokenPositionDescriptor
          • PeripheryImmutableState
          • PeripheryPayments
          • PeripheryPaymentsWithFee
          • PoolInitializer
          • QuoterV2
          • Quoter
          • SelfPermit
          • SwapRouter
          • TickLens
          • V3Migrator
        • V2.0 (Directional Fees) - Tokenomics
          • AlgebraEternalFarming
          • EternalVirtualPool
          • FarmingCenter
          • IAccessControl
          • IAlgebraEternalFarming
          • IAlgebraEternalVirtualPool
          • IFarmingCenter
          • IncentiveKey
          • VirtualTickStructure
      • Adaptive Fee
        • Adaptive Fee
        • How to set up specific formula behaviour
        • How to tweak formula behaviour
      • Contracts Setup
        • Deployment
          • Contracts Deployment
          • Deployment Scripts
        • Misc
          • POOL_INIT_CODE_HASH
          • Code Audits
          • Deployment Addresses
      • The Algebra Guides
        • Flash Integrations
          • The Full Contract
          • Calling Flash
          • Flash Callback
          • Inheritance constructor
        • Liquidity Mining
          • Liquidity Mining Overview
        • Providing Liquidity
          • Collecting fees
          • Decrease liquidity
          • Increase Liquidity Within The Current Range
          • Mint a new position
          • Set up your contract
          • The full contract
        • Swaps
          • Multihop swaps
          • Single swaps
    • 📊Subgraph
      • Query Examples
        • Query Examples
      • GraphQL Schema
        • Farming GraphQL Schema
        • Algebra GraphQL Schema
      • Subgraph Setup
        • Subgraph Settings
        • Subgraph Deployment
    • 🖥️Frontend
      • Admin Panel
        • Contracts
          • Admin Panel
          • Changing Subgraph
        • Eternal Farmings
          • Create Eternal Farming
          • Managing Eternal Farming
        • Limit Farmings
          • Create Limit Farming
    • ⚙️Backend
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    • ⛑️Guides
      • Step by Step Deployment
  • Other
    • 📦Archived Documentation
    • ❗Link Awareness Notice
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On this page
  • Overview
  • How to set up specific formula behaviour
  • How to make a fixed fee?
  • How to increase/decrease max fee?
  • How to increase/decrease min fee?
  • Adaptive fee is overreacting
  • Adaptive fee is weakly responsive to volatility
  • When will adaptive fee “calm down”?
  • How to tweak formula behaviour
  • Contract Interaction
  • Additional materials
  1. Algebra Integral / Technical Reference
  2. Plugins

Adaptive Fee

Overview

In order to calculate the fee value, information about the price change for the last 24 hours from oracle is used. Based on dynamic fee configuration and pool’s volatility data from the oracle, the fee value is calculated and applied to the swaps. DEX owners can configure different behaviors for the dynamic fee: set the minimum and maximum value of the fee and control volatility’s impact on the fee.

How to set up specific formula behaviour

How to make a fixed fee?

set alpha1 and alpha2 as 0, set baseFee as you want

How to increase/decrease max fee?

change alpha1 and/or alpha2

How to increase/decrease min fee?

change baseFee

Adaptive fee is overreacting

Increase beta1 and/or beta2. Also it's better to change the gamma accordingly

Adaptive fee is weakly responsive to volatility

Decrease beta1 and/or beta2. Also it's better to change the gamma accordingly

When will adaptive fee “calm down”?

Formulas take into account volatility and volume over the last 24 hours

How to tweak formula behaviour

Sigmoid coefficients Fee calculation can be tuned by the following parameters:

  struct Configuration {
    uint16 alpha1; // max value of the first sigmoid
    uint16 alpha2; // max value of the second sigmoid
    uint32 beta1; // shift along the x-axis for the first sigmoid
    uint32 beta2; // shift along the x-axis for the second sigmoid
    uint16 gamma1; // horizontal stretch factor for the first sigmoid
    uint16 gamma2; // horizontal stretch factor for the second sigmoid
    uint16 baseFee; // minimum possible fee
  }

Adaptive fee function is a combination of several sigmoids. The plot of the standard sigmoid function looks like this:

We use a more flexible formula for sigmoids:

So additional params (alpha, gamma, beta) allow us to shift, stretch and modify sigmoids. By changing the coefficients, it is possible to provide a wide range of different options:

Default params:

      2900, // alpha1
      12000, // alpha2
      360, // beta1
      60000, // beta2
      59, // gamma1
      8500, // gamma2
      100 // baseFee

So

max fee value is: baseFee + alpha1 + alpha2

min fee value is: baseFee

midpoint of the first sigmoid: beta1 midpoint of the second sigmoid: beta2

sigmoid “jump” “starts” around beta - 6 * gamma, ends around beta + 6 * gamma

alpha1, alpha2, beta1, beta2, gamma1, gamma2 – coefficients for volatility sigmoids.

Contract Interaction

To change the adaptive fee configuration of a specific pool, it is necessary to call the corresponding function of the plugin connected to the pool.

plugin.changeFeeConfiguration(AlgebraFeeConfiguration calldata _config)

To change the default adaptive fee config that will be applied to the new pools, it is necessary to call the corresponding function of the pluginFactory.

pluginFactory.setDefaultFeeConfiguration(AlgebraFeeConfiguration calldata newConfig)

Additional materials

Learn more about Adaptive Fee in our Tech Paper

PreviousOverviewNextSliding Fee

Last updated 6 months ago

Flexible formula
Sigmoid jumps

🧩
Algebra Protocol Tech Paper
Adaptive fee sigmoid
Sigmoids