zkSync Era batches users' transactions and submits them to Ethereum together with a zero-knowledge proof, paying a share of the transaction fees to Ethereum validators (expense).

zkSync Era is an L2 smart contract platform for decentralized applications on Ethereum. zkSync Era was founded by Matter Labs and launched in 2023.

Matter Labs team owns and governs the protocol. Matter Labs' investors include a16z, Lightspeed Venture Partners, Blockchain Capital, etc.

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zkSync Era

# zkSync Era Median transaction fee Methodology

## 1. Overview

The zkSync Era median transaction fee metric measures the middle value (50th percentile) of transaction fees paid on the zkSync Era network for each day, expressed in USD. This metric provides insight into typical transaction costs users face on the zkSync Era layer 2 network, filtering out extreme values that could skew average calculations. The methodology extracts all zkSync Era transactions, calculates individual fee amounts by multiplying gas usage by effective gas prices, and determines the daily median value.

## 2. Data sources

- **zkSync Era transaction records**: Complete transaction data from the zkSync Era blockchain including gas usage metrics, effective gas prices, block timestamps, and transaction identifiers
- **End-of-day token price feeds**: WETH price data used for converting ETH-denominated fees to USD values
- **Token metadata**: Decimal precision information for proper currency conversion calculations

## 3. Step-by-step calculation

### Component A: Transaction data extraction
- **Purpose**: Extract all zkSync Era transactions with complete gas and pricing information
- **Logic**: Retrieve all transactions from zkSync Era blockchain records, focusing on transactions that contain valid gas usage and pricing data. Filter for transactions with non-null `receipt_gas_used` and `receipt_effective_gas_price` values. Each transaction record includes block timestamp, transaction hash, sender and recipient addresses, and gas consumption metrics.
- **Key fields**: `block_timestamp` for daily grouping, `receipt_gas_used` for gas consumption amount, `receipt_effective_gas_price` for the actual price paid per gas unit, `transaction_hash` for unique transaction identification

### Component B: Individual fee calculation
- **Purpose**: Calculate the actual fee paid for each transaction in ETH units
- **Logic**: For each transaction, multiply the `gas_used` amount by the `effective_gas_price` to get the total fee in wei. Convert this wei amount to ETH by dividing by 10^18. Handle cases where gas information is missing by defaulting fee amounts to zero. The effective gas price represents the actual price paid per gas unit after any network adjustments or optimizations.
- **Key fields**: `fee_amount` representing the calculated transaction fee in ETH, derived from gas consumption and pricing data

### Component C: Daily median aggregation
- **Purpose**: Calculate the median (50th percentile) transaction fee for each day
- **Logic**: Group all transaction fees by day using timestamp truncation to daily boundaries. For each day's collection of transaction fees, calculate the median value using the 50th percentile of the fee distribution. This approach filters out extremely high or low fees that could skew average calculations, providing a more representative measure of typical user transaction costs.
- **Key fields**: `timestamp` representing the daily boundary, `transaction_fee_median` containing the 50th percentile fee value for that day

### Final aggregation
- **Combining components**: The daily median fee values flow directly from the aggregation step without additional combination logic
- **Currency conversion**: Convert ETH-denominated median fees to USD using end-of-day WETH price feeds, applying appropriate decimal corrections for currency precision
- **Time aggregation**: Daily boundaries are established using timestamp truncation, ensuring consistent 24-hour periods for fee calculations
- **Final calculation**: The final metric represents the daily median transaction fee in USD, providing a stable measure of typical transaction costs on zkSync Era that accounts for the layer 2 network's fee structure and gas optimization mechanisms

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

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Median transaction fee

Median transaction fee

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