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Blockchains (L1)

Plasma

# Plasma Average transaction fee Methodology

## 1. Overview

The average transaction fee metric measures the mean cost per transaction on the Plasma blockchain, calculated by dividing total daily transaction fees by the number of transactions. This metric provides insights into network usage costs and fee market dynamics. The calculation implements the EIP-1559 fee model, accounting for both base fees (burned) and priority fees (paid to validators), with results expressed in USD.

## 2. Data sources

The calculation relies on several core data sources:
- **Plasma transaction records**: Raw blockchain transaction data including gas usage, effective gas prices, sender/receiver addresses, and transaction hashes
- **Plasma block records**: Block-level data containing base fee per gas values required for EIP-1559 fee calculations
- **End-of-day token price feeds**: USD price data for XPL (Plasma's native token) used for currency conversion
- **Token metadata**: Information about the XPL token including its contract address (`0x6100e367285b01f48d07953803a2d8dca5d19873`) and symbol

## 3. Step-by-step calculation

### Component A: Transaction data preparation
- **Purpose**: Extract and standardize raw transaction and block data for fee calculations
- **Logic**: Raw transaction records are filtered and cast to appropriate data types, including `block_timestamp`, `transaction_hash`, `from_address`, `to_address`, `gas_used`, and `effective_gas_price`. These transactions are joined with block records to obtain the `base_fee_per_gas` values needed for EIP-1559 calculations. All transactions are tagged with the native token information (XPL token address and symbol).
- **Key fields**: `gas_used` (gas consumed by transaction), `effective_gas_price` (actual price paid per gas unit), `base_fee_per_gas` (network base fee), `block_timestamp` (transaction timing)

### Component B: Gas fee calculation
- **Purpose**: Calculate total transaction fees using the EIP-1559 model, separating base fees and priority fees
- **Logic**: For each transaction, base fees are calculated by multiplying `gas_used` by `base_fee_per_gas`, representing the portion burned by the network. Priority fees are calculated by multiplying `gas_used` by the difference between `effective_gas_price` and `base_fee_per_gas`, representing tips paid to validators. Both fee components are converted from wei to token units by dividing by 1e18. Daily aggregation sums all base fees and priority fees separately, then combines them for total daily fees.
- **Key fields**: `base_fee` (burned portion), `priority_fee` (validator portion), total fees calculated as base fee plus priority fee

### Component C: Transaction counting
- **Purpose**: Count the total number of unique transactions per day
- **Logic**: Transaction records are grouped by day using timestamp truncation, and distinct `transaction_hash` values are counted. This includes all transactions regardless of success status or gas usage patterns. The counting is performed at the daily grain level to match the fee aggregation timeframe.
- **Key fields**: `transaction_count` (distinct daily transaction count), `timestamp` (daily timestamp grain)

### Component D: Currency conversion
- **Purpose**: Convert native token fees to USD for standardized reporting
- **Logic**: Total daily fees in XPL tokens are converted to USD using end-of-day price feeds. The conversion applies appropriate decimal corrections and handles the native token pricing through Token Terminal's standard currency conversion process.
- **Key fields**: USD-denominated `fees` after conversion from native XPL amounts

### Final aggregation
- **Combining components**: Daily fee totals in USD are joined with daily transaction counts using the timestamp field as the join key. Both datasets use the same daily timestamp truncation to ensure proper alignment.
- **Currency conversion**: All fees are expressed in USD after conversion from native XPL token amounts using end-of-day pricing
- **Time aggregation**: Data is aggregated at daily boundaries using timestamp truncation to the day level
- **Final calculation**: Average transaction fee is computed by dividing total daily fees in USD by the daily transaction count, using safe division to handle edge cases where transaction count might be zero. The result represents the mean cost per transaction for that day on the Plasma network.

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

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Average transaction fee

Average transaction fee

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