# Katana Vault Bridge Revenue Methodology

## 1. Overview

Revenue measures the portion of fees retained by Katana Vault Bridge from its yield-generating vaults. For Katana Vault Bridge, revenue is generated from the yield harvested across supported asset vaults, including USDC, USDT, ETH, WBTC, and USDS. Because no supply-side payout is distributed to external participants, 100% of the harvested yield is retained by the protocol as revenue. This metric is utilized to assess the protocol's direct earnings from its vault bridging infrastructure.

## 2. Data sources

- **Blockchain events**: `YieldCollected` events from `vbUSDC`, `vbUSDT`, `vbETH`, `vbWBTC`, and `vbUSDS` contracts, covering Ethereum
- **External data**: End-of-day price feeds for the underlying assets (USDC, USDT, WETH, WBTC, and USDS)

## 3. Step-by-step calculation

### Component A: Katana Vault Bridge yield extraction

- **Purpose**: To extract the raw yield harvested by each vault contract.
- **Logic**: `YieldCollected` events are parsed from the `vbUSDC`, `vbUSDT`, `vbETH`, `vbWBTC`, and `vbUSDS` vault contracts on Ethereum. The `vbTokenAmount` field is extracted from each event to determine the raw yield amount harvested for each respective underlying asset.
- **Key fields**: `block_timestamp` (timing), `vault_address` (contract identification), `token_address` (underlying asset identification), and `vbTokenAmount` (yield quantity).

### Component B: Daily aggregation and decimal normalization

- **Purpose**: To aggregate yield amounts daily and normalize them by asset decimal precision.
- **Logic**: Raw yield amounts are aggregated on a daily basis using UTC day boundaries, grouped by vault and underlying asset. The aggregated native amounts are normalized by the decimal precision of each respective underlying asset using asset metadata.
- **Key fields**: `timestamp` (daily boundary) and `yield_amount` (normalized yield quantity).

### Component C: USD conversion and revenue mapping

- **Purpose**: To convert normalized yield values to USD and map them to protocol revenue.
- **Logic**: Normalized daily yield amounts are multiplied by end-of-day asset prices to calculate the USD value of the harvested yield. Since no portion of these fees is distributed to supply-side participants, 100% of the collected fees are mapped directly to protocol revenue.
- **Key fields**: `revenue` (final USD value).

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

fees * take_rate (illustrative — revenue is observed directly per project, not derived from take_rate)

Fee revenue retained after supply-side payouts. Before cost of revenue (e.g. L2 DA fees) and before operating expenses.

Revenue

Bridges

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 Vault Bridge

Revenue

Revenue

Chain breakdown