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

OP Mainnet is an L2 smart contract platform for decentralized applications on Ethereum. OP Mainnet was founded by Jinglan Wang, Karl Floersch & Kevin Ho and launched in 2021.

Optimism team & investors own and govern the protocol. Optimism’s investors include Paradigm, a16z, IDEO CoLab Ventures, etc.

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OP Mainnet

# OP Mainnet Supply-side fees Methodology

## 1. Overview

Optimism supply-side fees represent the portion of total fees that would be distributed to supply-side participants (like validators or stakers) in the network. However, by design, Optimism has no supply-side fees - this metric is always set to 0. The calculation maintains the same data structure and validation as other fee metrics but applies a hardcoded business rule that sets all supply-side fee values to zero.

## 2. Data sources

The underlying data infrastructure (though the final result is always 0) references:
- **Optimism transaction records**: Raw transaction data including gas usage, gas prices, and L1 data availability fees
- **Base blockchain events**: Parsed `FeesDisbursed` events from Base's `FeeDisburser` contract that track fee distributions flowing to Optimism
- **End-of-day token price feeds**: Price data for converting ETH-denominated fees to USD equivalents

## 3. Step-by-step calculation

### Component A: Optimism transaction fees
- **Purpose**: Calculates total L2 execution and L1 data availability fees from Optimism transactions
- **Logic**: Processes raw Optimism transaction data to extract gas usage, gas prices, and L1 fee components. Calculates L2 execution fees by multiplying `gas_used_amount` by `gas_price`, and extracts L1 data availability fees from the `l1_fee_amount` field. Converts all amounts from wei to ETH by dividing by 1e18
- **Key fields**: `gas_used_amount`, `gas_price`, `l1_fee_amount`, `l2_gas_fee_amount`, `l1_gas_fee_amount`

### Component B: Base fee distributions
- **Purpose**: Captures fee distributions from Base chain that flow to Optimism
- **Logic**: Processes `FeesDisbursed` events from Base's fee distribution contract. Extracts the `paidToOptimism` amount that represents fees flowing from Base to Optimism. Converts amounts from wei to ETH by dividing by 10^18
- **Key fields**: `paidToOptimism`, `totalFeesDisbursed`, `optimism_amount`

### Component C: Daily aggregation
- **Purpose**: Combines and aggregates all fee sources by day
- **Logic**: Unions transaction fees from Component A and Base distributions from Component B. Groups by daily timestamp, chain identifier, and token address. Sums all fee amounts to get total daily fees per token
- **Key fields**: `timestamp`, `chain_id`, `token_address`, `fees`

### Component D: USD conversion
- **Purpose**: Converts ETH-denominated fees to USD equivalents
- **Logic**: Applies end-of-day ETH price feeds to convert aggregated daily fees from ETH to USD. Uses the convert to USD macro with decimal correction disabled since amounts are already in proper ETH units
- **Key fields**: `fees` (converted to USD)

### Final calculation
- **Supply-side allocation**: Applies hardcoded business rule setting `fees_supply_side` to 0 for all records, regardless of the total fee amounts calculated in previous components
- **Schema validation**: Applies finalize metric macro to ensure proper data types, validate chain and product identifiers, and fill any gaps in the time series with zero values
- **Final result**: All supply-side fees are 0, maintaining the data structure but reflecting Optimism's design where no fees are distributed to supply-side participants

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

Portion of fees distributed to service providers or supply-side participants.

OP MainnetOP

Supply-side fees

Supply-side fees

Competitive landscape

Chain breakdown