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Unichain

# Unichain Fees Methodology

## 1. Overview

This metric measures the total gas fees paid daily on the Unichain blockchain, expressed in USD. It represents the aggregate cost that users pay to execute transactions on this Layer 2 (L2) network. The calculation combines both L1 (Ethereum mainnet) and L2 (Unichain) gas fee components, as L2 transactions incur costs on both layers due to the rollup architecture.

## 2. Data sources

- **Unichain transaction records**: Raw blockchain transaction data containing gas usage metrics, gas prices, and L1 fee information
- **End-of-day ETH price feeds**: Token price data for converting ETH-denominated fees to USD
- **Token metadata**: Standardized token information for ETH on Unichain, including the canonical token address `0x4200000000000000000000000000000000000006`

## 3. Step-by-step calculation

### Component A: Transaction data standardization
- **Purpose**: Extract and standardize raw transaction data from Unichain blockchain
- **Logic**: Raw transaction records are processed to extract gas-related fields including `gas_used`, `gas_price`, `l1_gas_used`, `l1_gas_price`, `l1_fee_scalar`, and `l1_fee`. The ETH token is standardized with address `0x4200000000000000000000000000000000000006` and symbol `ETH`. Transaction timestamps, addresses, and gas metrics are cast to appropriate data types.
- **Key fields**: `gas_used` (L2 gas consumption), `gas_price` (L2 gas price), `l1_fee` (direct L1 fee), `l1_gas_used` (L1 gas consumption), `l1_gas_price` (L1 gas price), `l1_fee_scalar` (L1 fee multiplier)

### Component B: Daily gas fee aggregation
- **Purpose**: Calculate total daily gas fees by combining L1 and L2 components
- **Logic**: Transaction data is aggregated to daily level using timestamp truncation. L2 gas fees are calculated by multiplying `gas_used` by `gas_price` and dividing by 1e18 to convert from wei to ETH units. L1 gas fees use either the direct `l1_fee` field when available, or are calculated as `l1_gas_used` multiplied by `l1_gas_price` and `l1_fee_scalar`, then divided by 1e18. The calculation prioritizes the direct `l1_fee` over the computed value. All fees are summed across transactions for each day.
- **Key fields**: `l2_gas_fee` (daily L2 gas fees in ETH), `l1_gas_fee` (daily L1 gas fees in ETH)

### Final aggregation
- **Combining components**: L1 and L2 gas fee components are summed to create total daily gas fees in ETH
- **Currency conversion**: Total ETH fees are converted to USD using end-of-day ETH price feeds, with decimal correction applied as needed
- **Time aggregation**: Data is aggregated at daily boundaries using day-level timestamp truncation
- **Final calculation**: The final metric represents the sum of L1 and L2 gas fees converted to USD, with standard metric validation, gap-filling with zeros for missing days, and chain availability filtering applied

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

Total value users pay to use a protocol (gross fees, user-paid fees).

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