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Blockchains (L3)

# XAI Average transaction fee Methodology

## 1. Overview

The XAI average transaction fee metric calculates the mean cost per transaction on the XAI blockchain in USD. This metric provides insight into the typical cost users pay to execute transactions on the network. The calculation divides the total daily transaction fees (converted to USD) by the total number of transactions executed on that day.

## 2. Data sources

- **XAI blockchain transactions**: Raw transaction records from the XAI blockchain containing transaction hashes, addresses, timestamps, gas usage amounts, and gas prices
- **End-of-day price feeds**: Daily XAI token prices in USD from CoinGecko market data (using the 'xai-blockchain' identifier)  
- **Address labels**: Public address labels dataset for the XAI chain, used to categorize transaction destinations (though this enrichment doesn't affect the final average calculation)

## 3. Step-by-step calculation

### Component A: Gas fee calculation
- **Purpose**: Calculate the native token cost for each transaction on XAI
- **Logic**: Extract raw transaction data from XAI blockchain records including `gas_used_amount`, `gas_price`, timestamps, and transaction hashes. Calculate the L3 gas fee by multiplying the gas used amount by the gas price, then divide by 1e18 to convert from wei units to standard XAI token units. Filter transactions up to the cutoff date of August 22, 2025
- **Key fields**: `gas_used_amount`, `gas_price`, `l3_gas_fee_amount`, `block_timestamp`, `transaction_hash`

### Component B: Daily fee aggregation and USD conversion  
- **Purpose**: Sum all transaction fees per day and convert to USD values
- **Logic**: Truncate transaction timestamps to daily boundaries and aggregate all L3 gas fees for each day by summing the `fees` amounts. Join the daily fee totals with corresponding daily XAI token prices from CoinGecko market data. Convert native token fees to USD by multiplying the daily fee sum by the daily XAI price in USD
- **Key fields**: `timestamp`, `fees`, `price`

### Component C: Daily transaction counting
- **Purpose**: Count the total number of unique transactions per day
- **Logic**: Use the same raw XAI transaction data, truncate timestamps to daily boundaries, and count unique transactions using approximate distinct count of transaction hashes grouped by day. Enrich with address labels to categorize transaction destinations, but this labeling is for informational purposes only
- **Key fields**: `transaction_hash`, `transaction_count`, `timestamp`

### Final aggregation
- **Combining components**: Join the daily fee totals (in USD) with daily transaction counts on matching timestamps using an inner join to ensure both metrics exist for each day
- **Currency conversion**: Fees are already converted to USD in the fee aggregation step using end-of-day XAI token prices
- **Time aggregation**: All data is aggregated to daily boundaries using timestamp truncation to day level
- **Final calculation**: Calculate the average transaction fee by dividing the total daily fees in USD by the total daily transaction count using safe division to handle potential zero-transaction days. The result represents the mean cost per transaction in USD for each day

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

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