opBNB is built on the OP Stack, the same underlying framework as Optimism. It extends the Ethereum Virtual Machine (EVM) to provide faster and cheaper transactions, while leveraging BNB Smart Chain (BSC) for ecosystem integration.

opBNB is an Ethereum-compatible Layer 2 scaling solution designed to improve the performance and affordability of decentralized applications on BNB Chain. It provides high throughput and low fees, making it suitable for gaming, social, and DeFi applications.

opBNB is developed by BNB Chain, which is supported by contributors from the broader Binance ecosystem.

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opBNB

# opBNB Fees Methodology

## 1. Overview

The opBNB fees metric measures the total daily gas fees paid by users on the opBNB network, denominated in USD. This metric captures the revenue generated by the opBNB Layer 2 blockchain from transaction execution and data availability costs. As an optimistic rollup built on BNB Chain, opBNB transactions incur both Layer 2 execution fees (for computation and state changes) and Layer 1 fees (for data availability and settlement on the underlying BNB Chain). The calculation aggregates these fee components across all network transactions and converts them to USD using end-of-day BNB price feeds.

## 2. Data sources

- **opBNB blockchain transaction records**: Complete transaction data including gas consumption, gas prices, transaction hashes, addresses, and Layer 1 fee parameters
- **Layer 1 fee calculation data**: Rollup-specific parameters including `l1_gas_used`, `l1_gas_price`, `l1_fee_scalar`, and direct `l1_fee` values for data availability costs
- **Gas execution data**: Layer 2 gas consumption (`gas_used`) and pricing (`gas_price`) for transaction execution
- **End-of-day price feeds**: BNB token prices from CoinGecko API for USD conversion
- **Token metadata**: opBNB native token information (BNB contract address `0x4200000000000000000000000000000000000006`)

## 3. Step-by-step calculation

### Component A: Transaction data extraction

- **Purpose**: Extract and standardize transaction-level gas fee data from opBNB blockchain records
- **Logic**: Pull transaction records from opBNB blockchain data, focusing on gas consumption and fee calculation parameters. Each transaction contains both Layer 2 execution metrics (`gas_used`, `gas_price`) and Layer 1 data availability metrics (`l1_gas_used`, `l1_gas_price`, `l1_fee_scalar`, `l1_fee`). The system standardizes all transactions to use the canonical BNB token address and applies proper data type casting for numerical calculations
- **Key fields**: `block_timestamp` for daily aggregation, `gas_used` and `gas_price` for L2 fees, `l1_gas_used`, `l1_gas_price`, `l1_fee_scalar`, and `l1_fee` for L1 costs, `token_address` set to the standard BNB contract address

### Component B: Daily gas fee aggregation

- **Purpose**: Calculate total daily Layer 1 and Layer 2 gas fees in native BNB denomination
- **Logic**: Group transactions by day and aggregate fee components separately. For Layer 2 fees, multiply `gas_used` by `gas_price` and convert from wei to BNB by dividing by 1e18. For Layer 1 fees, use either the direct `l1_fee` field when available, or calculate it as (`l1_gas_used` * `l1_gas_price` * `l1_fee_scalar`) / 1e18. The system takes whichever L1 calculation method provides data, handling different data availability patterns in the rollup fee structure. Sum all fee components across transactions for each day
- **Key fields**: Daily `timestamp` from truncated block timestamps, `l2_gas_fee` as the sum of execution fees, `l1_gas_fee` as the sum of data availability fees, `token_address` for BNB token identification

### Final aggregation

- **Combining components**: Add Layer 1 and Layer 2 fee components together (`l1_gas_fee` + `l2_gas_fee`) to get total daily fees in BNB denomination
- **Currency conversion**: Convert BNB-denominated fees to USD using end-of-day BNB price feeds from CoinGecko, identified by the 'binancecoin' CoinGecko ID
- **Time aggregation**: Use daily boundaries based on UTC timestamps, with fees aggregated and reported once per day
- **Final calculation**: The final metric represents the total USD value of all gas fees (both Layer 1 data availability and Layer 2 execution costs) paid by users on the opBNB network each day, including standard metric metadata (chain_id: 'opbnb', market_sector_id: 'blockchains_l2', business_segment_id: 'blockchain') and zero-filling for days with no transaction activity

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

Total value users pay to use a protocol (gross fees, user-paid fees).

opBNB

Fees

Fees

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