The network uses pessimistic proofs via the AgglayerGateway for settlement on Ethereum, with vault bridges for cross-chain asset transfers.

Katana Network provides a scalable execution environment connected to Ethereum through the Agglayer interoperability layer.

Katana Network is a Layer 2 blockchain built on the Agglayer ecosystem.

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Blockchains (L2)

Katana

# Katana Fees Methodology

## 1. Overview

Fees measures the total economic value paid by users and generated by assets across the Katana ecosystem. Value is captured from network transaction costs, trading fees, asset yields, and governance-related fees. These fee streams are generated across several core products, including Katana Chain, Katana Perps, Katana Vault Bridge, Katana AUSD Yield, and vKAT. A comprehensive representation of the protocol's economic activity is provided by aggregating these components.

## 2. Data sources

- **Blockchain events**: `TradeExecuted` events from `Exchange` contracts, `YieldCollected` events from Vault Bridge contracts, ERC-20 `Transfer` events to the Katana-controlled Safe, `Exit` events from `DynamicExitQueue` contracts, and `NewCampaign` events from `DistributionCreator` contracts, as well as transaction gas data, covering Katana Chain and Ethereum
- **External data**: End-of-day price feeds for native gas assets and supported ERC-20 assets, and asset metadata for decimal normalization

## 3. Step-by-step calculation

### Component A: Katana Chain gas fees

- **Purpose**: Capture transaction fees on Katana Chain
- **Logic**: Gas fees are calculated from transaction data on Katana Chain. Included in this calculation are L2 execution gas fees, L1 settlement gas fees, and Isthmus operator fees. L2 gas fees are calculated by multiplying gas used by the effective gas price. L1 gas fees are derived from the L1 fee or calculated using L1 gas used, L1 gas price, and the L1 fee scalar. Isthmus operator fees are calculated using a constant operator fee combined with gas used multiplied by an operator fee scalar. All three components are normalized by decimal precision, summed, and converted to USD.
- **Key fields**: `gas_used`, `gas_price`, `l1_fee`, `l1_gas_used`, `l1_gas_price`, `l1_fee_scalar`, `operator_fee_constant`, `operator_fee_scalar`

### Component B: Katana Perps trading fees

- **Purpose**: Capture trading fees from the perpetual exchange
- **Logic**: Trading fees are extracted from `TradeExecuted` events emitted by V1 and V2 `Exchange` contracts. Both maker fees and taker fees are parsed from each trade event. These fee amounts are normalized by decimal precision, aggregated daily, and converted to USD.
- **Key fields**: `maker_fee_usd`, `taker_fee_usd`

### Component C: Katana Vault Bridge yield

- **Purpose**: Capture yield generated by the Vault Bridge
- **Logic**: Yield events are parsed from `YieldCollected` events emitted by Vault Bridge contracts (including `vbUSDC`, `vbUSDT`, `vbETH`, `vbWBTC`, and `vbUSDS`) on Ethereum. The harvested yield amounts are extracted, normalized by the decimal precision of the underlying assets, aggregated daily, and converted to USD.
- **Key fields**: `amount` (representing the harvested yield)

### Component D: Katana AUSD Yield

- **Purpose**: Capture T-bill yield share from Agora
- **Logic**: Inflows of AUSD to the Katana-controlled Safe are tracked using ERC-20 `Transfer` events. Transfers where the recipient is the designated Safe address and the asset is the AUSD token are filtered. These native amounts are normalized by decimal precision, aggregated daily, and converted to USD.
- **Key fields**: `amount`, `to_address`, `token_address`

### Component E: vKAT exit fees and voting incentives

- **Purpose**: Capture early-exit fees and third-party voting incentives associated with vKAT
- **Logic**: Early-exit fees are extracted from `Exit` events emitted by `DynamicExitQueue` contracts when a vKAT lock is withdrawn. Third-party voting incentives are extracted from `NewCampaign` events emitted by `DistributionCreator` contracts, filtering for campaign type 102. Campaigns created by Katana-related addresses (such as the Katana DAO and its yield Safe) are excluded to prevent double counting. Both exit fees and voting incentives are normalized by decimal precision, aggregated daily, and converted to USD.
- **Key fields**: `fee_amount` (for exit fees), `reward_amount`, `campaign_id`, `creator` (for voting incentives)

### Component F: USD conversion and aggregation

- **Purpose**: Standardize all fee components into USD and aggregate them
- **Logic**: All fee components are normalized by their respective asset decimal precisions and multiplied by end-of-day asset prices. The USD-denominated values from all products are summed daily to produce the final daily fees metric.
- **Key fields**: `fees`, `price_usd`

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

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

KatanaKAT

Fees

Fees

Competitive landscape

Chain breakdown