Aleph Zero EVM is powered by Arbitrum's AnyTrust protocol which uses a data availability committee (DAC) to store raw transaction data.

Aleph Zero EVM is an Ethereum layer 2 powered by Arbitrum Orbit tech stack. This dashboard does not include Aleph Zero WASM data.

AZERO tokenholders own and govern the protocol.

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Blockchains (L2)

Aleph Zero EVM

# Aleph Zero EVM Median transaction fee Methodology

## 1. Overview

The median transaction fee metric measures the typical cost of executing transactions on the AlephZero EVM blockchain, expressed in USD. This metric calculates the daily median of all transaction fees paid by users, providing insight into the network's cost structure and accessibility. The calculation involves extracting individual transaction gas fees from blockchain data, computing daily medians, and converting to USD using market prices.

## 2. Data sources

- **AlephZero EVM transaction records**: Complete transaction data from the AlephZero EVM blockchain, including gas price and gas usage information from transaction receipts
- **End-of-day price feeds**: Daily AZERO token price data from CoinGecko market data feeds for USD conversion

## 3. Step-by-step calculation

### Component A: Transaction fee calculation
- **Purpose**: Calculate individual transaction fees in native AZERO tokens for each blockchain transaction
- **Logic**: Extract transaction data from AlephZero EVM blockchain records, including `receipt_effective_gas_price` and `receipt_gas_used` fields from transaction receipts. Calculate the L2 gas fee by multiplying the gas used amount by the gas price, then divide by 1e18 to convert from wei units to AZERO tokens. This gives the actual fee paid by users for each transaction
- **Key fields**: `gas_price` (effective gas price in wei), `gas_used_amount` (gas consumed), `l2_gas_fee_amount` (calculated fee in AZERO)

### Component B: Daily median aggregation
- **Purpose**: Compute the median transaction fee for each calendar day
- **Logic**: Group all transaction fees by day using timestamp truncation to daily boundaries. For each day, calculate the median fee amount using BigQuery's approximate quantiles function, specifically extracting the 50th percentile value from the distribution of transaction fees. This provides a representative middle value that is less sensitive to outliers than mean calculations
- **Key fields**: `timestamp` (truncated to day), `transaction_fee_median` (50th percentile of daily fees in AZERO)

### Component C: Price data integration
- **Purpose**: Obtain daily AZERO token prices for USD conversion
- **Logic**: Extract daily AZERO token prices from CoinGecko market data using the 'aleph-zero' identifier. Use the daily timestamp as the key for joining with transaction fee data
- **Key fields**: `timestamp` (daily price date), `price` (AZERO price in USD)

### Final aggregation
- **Combining components**: Join daily median transaction fees with corresponding AZERO prices on the timestamp field to enable currency conversion
- **Currency conversion**: Multiply the median transaction fee (in AZERO) by the daily AZERO price to get the USD-denominated median fee
- **Time aggregation**: Results are aggregated to daily boundaries, with each day represented by its median transaction fee
- **Final calculation**: The final metric value is the daily median transaction fee in USD, calculated as median_fee_azero × azero_price_usd, with missing days filled with zero values and results filtered to dates through 2025-09-17

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

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