Base batches users' transactions and submits them to Ethereum, paying a share of the transaction fees to Ethereum validators (expense).

Base is an Ethereum Layer 2 (L2) offering a secure, low-cost, builder-friendly way for anyone, anywhere, to build onchain.

Coinbase team owns and governs the protocol. Coinbase is a public company and its investors include Andreessen Horowitz, Vanguard Group, ARK Investment Management, etc.

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Blockchains (L2)

Base

# Base Superchain fees Methodology

## 1. Overview

The Superchain fees metric measures the daily USD value of transaction fees that flow from Base (an Optimism Layer 2 network) to the broader Optimism Superchain ecosystem. This represents the portion of Base's collected fees that are distributed upward to Optimism rather than retained by Base's sequencer operations. The metric helps track the financial contribution of Base network activity to the Optimism Superchain collective.

## 2. Data sources

- **Base blockchain events**: Parsed `FeesDisbursed` events from Base's FeeDisburser contract that record fee distribution activities
- **Transaction data**: Base network block timestamps and transaction metadata for event context
- **External data**: End-of-day price feeds for WETH/ETH to enable USD conversion
- **Token metadata**: WETH contract address and symbol information for Base network

## 3. Step-by-step calculation

### Component A: Fee distribution extraction
- **Purpose**: Extracts the specific portion of Base fees that flow to the Optimism Superchain
- **Logic**: Processes `FeesDisbursed` events from Base's FeeDisburser contract, which records when collected fees are distributed between Base's sequencer and the Optimism Superchain. The events contain three amounts: total fees disbursed, amount paid to Optimism, and the calculated sequencer portion. Only the Optimism portion (`paidToOptimism` field) is used for this metric, representing the actual Superchain fees
- **Key fields**: `paidToOptimism` amount (raw wei values), `block_timestamp` for daily aggregation, `totalFeesDisbursed` for reference, and hardcoded WETH token address `0x4200000000000000000000000000000000000006`

### Component B: Unit conversion and USD pricing
- **Purpose**: Converts raw blockchain amounts to human-readable USD values
- **Logic**: Raw fee amounts are recorded in wei (smallest ETH unit with 18 decimal places) and must be converted to standard ETH units by dividing by 10^18. The resulting ETH amounts are then converted to USD using end-of-day WETH price feeds. No additional decimal correction is applied since the division already handles the 18-decimal conversion
- **Key fields**: `superchain_fees` (converted ETH amounts), daily price feed values for WETH, and USD equivalent amounts

### Final aggregation
- **Combining components**: Fee distribution data is combined with price feed data through the USD conversion process, matching on date and token (WETH)
- **Currency conversion**: USD conversion uses end-of-day WETH price feeds, applied after the wei-to-ETH decimal conversion
- **Time aggregation**: Daily boundaries are established by truncating block timestamps to day level, ensuring consistent daily totals regardless of when during the day fee distributions occur
- **Final calculation**: The final daily metric represents the total USD value of all Base fees that flowed to the Optimism Superchain on each day, with missing days forward-filled with zero values and filtered based on Base network's operational availability periods

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

Fees paid by Superchains to the OP Collective.

Base

Superchain fees

Superchain fees

Competitive landscape

Chain breakdown