# Supply-side fees Methodology

## Overview

share of fees that goes to the service providers.

## Data sources

- Smart contract events and program instructions capturing fee-generating activities
- Block-level fee data and transaction metadata
- Token price feeds for USD conversion
- Token metadata for decimal precision

## Common calculation approaches

### Smart contract fee extraction
For decentralized exchanges and lending protocols, supply-side fees are calculated by extracting fee-related data directly from smart contract events and program instructions. For example, swap fees are derived from `Swap` events from Uniswap pools and swap instructions from Meteora programs on Solana, while interest-based fees are captured from `ReserveDataUpdated` events from Aave contracts. These raw amounts are normalized by decimal precision and converted to USD using end-of-day price feeds.

### Revenue-split deduction
For liquid staking platforms and certain automated market makers, supply-side fees are determined by applying a distribution split to total fees or by subtracting protocol revenue from total fees. In the case of Lido Finance, supply-side fees are calculated as a fixed percentage of total staking rewards, representing the portion distributed to node operators. Similarly, for Uniswap, the supply-side portion is derived by subtracting the protocol revenue retained by the treasury from the total fees generated by trading activity.

### Transaction fee allocation
For blockchain networks, supply-side fees are defined as the portion of transaction fees distributed to validators for securing the network. On Solana, these fees are calculated by aggregating block-level fee data and subtracting the portion of transaction fees that is permanently burned. The remaining net compensation is then converted to USD using end-of-day price feeds.

**Note:** The calculation approaches and protocol examples above are representative patterns. Individual protocol implementations may vary.

*This methodology was automatically generated by Token Terminal's methodology analyzer.*

Portion of fees distributed to service providers or supply-side participants.

JustLend V1 lending markets

Supply-side fees

Supply-side fees