DEX aggregators

Oku Trade

# Oku Trade Fees Methodology

## 1. Overview

Oku fees represent the trading fees collected by Oku's v3 AMM pools on the XDC blockchain. These fees are calculated by multiplying trading volume and flash loan volume by their respective pool fee tiers. Oku operates as a decentralized exchange using the Uniswap v3 model where liquidity providers earn fees from traders and flash loan users. The metric captures the total fee revenue generated across all Oku pools on a daily basis.

## 2. Data sources

- **XDC blockchain event logs**: Parsed `Pool_Swap_event`, `Pool_Flash_event`, and `Factory_PoolCreated_event` logs from Oku's v3 AMM contracts
- **XDC transaction data**: Transaction records providing user addresses and transaction metadata
- **Token metadata**: Token decimals and symbols for proper amount calculation and display
- **End-of-day price feeds**: Daily token prices in USD for volume conversion

## 3. Step-by-step calculation

### Component A: Trading volume calculation
- **Purpose**: Calculate daily trading volume in USD for all Oku v3 pools to determine fee basis
- **Logic**: Extract `Pool_Swap_event` logs containing `token0_amount` and `token1_amount` fields representing raw token quantities exchanged. Join with pool creation data to obtain token addresses and decimals. Convert raw amounts to proper decimal representation by dividing by 10^token_decimals. Convert each token amount to USD using end-of-day price feeds. Use the lesser of the two USD values (token0 vs token1) to prevent price manipulation attacks. Aggregate by day, chain, and pool address using sum function.
- **Key fields**: `token0_amount`, `token1_amount` from swap events, `fee_tier` from pool creation, daily aggregated `trading_volume` in USD

### Component B: Flash loan volume calculation  
- **Purpose**: Calculate daily flash loan volume in USD for fee calculation on flash loan activity
- **Logic**: Extract `Pool_Flash_event` logs containing `token0_amount` and `token1_amount` fields representing flash loan quantities. Apply same decimal correction and USD conversion as trading volume. Unlike trading volume, sum both token USD values together since flash loans don't have price manipulation concerns (loans must be repaid in same transaction). Aggregate by day, chain, and pool address.
- **Key fields**: `token0_amount`, `token1_amount` from flash events, daily aggregated `flash_loan_volume` in USD

### Component C: Pool fee tier determination
- **Purpose**: Establish the fee percentage for each pool used to calculate fees from volumes
- **Logic**: Extract `Factory_PoolCreated_event` logs containing pool addresses and `fee` parameter. Convert fee from basis points integer format to decimal percentage by dividing by 1,000,000. Each pool has a fixed fee tier set at creation (e.g., 3000 basis points = 0.3% fee). Join pool addresses with their respective fee tiers for volume calculations.
- **Key fields**: `fee` (converted to `fee_tier` as decimal), `pool` address from factory events

### Final aggregation
- **Combining components**: Multiply trading volume by fee tier to get trading fees, multiply flash loan volume by fee tier to get flash loan fees, then sum both fee types together
- **Currency conversion**: All volumes converted to USD using end-of-day price feeds matched by date, token address, and chain
- **Time aggregation**: Daily boundaries using timestamp truncation to day level, with all events grouped by calendar day
- **Final calculation**: Total daily fees = (trading_volume × fee_tier) + (flash_loan_volume × fee_tier), aggregated across all pools and summed by day, chain, and product

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

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