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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Katana

# Katana Network Bridge deposits Methodology

## 1. Overview

Bridge deposits measures the total value of assets held in the bridge contracts of Katana Chain on the main chain. This metric serves as a leading indicator of user intent to transact within the Katana Network ecosystem by tracking the capital migrated to the network. The calculation accounts for assets moved through the canonical Agglayer bridge as well as assets held in specific bridge vaults on Ethereum.

## 2. Data sources

- **Blockchain events**: `BridgeEvent` and `ClaimEvent` events from `AgglayerBridge` contracts, and ERC-20 `Transfer` events associated with bridge vault addresses, covering Ethereum
- **External data**: End-of-day price feeds for bridged assets

## 3. Step-by-step calculation

### Component A: Agglayer bridge flow extraction

- **Purpose**: Captures asset deposits and withdrawals through the canonical Agglayer bridge
- **Logic**: `BridgeEvent` events are parsed from `AgglayerBridge` contracts on Ethereum to identify deposits where the destination network is Katana Chain. `ClaimEvent` events are parsed from the same contracts to identify withdrawals (claims) back to the main chain. Specific vault bridge assets are excluded from these event logs to prevent double-counting with portfolio-tracked balances. For transactions involving the null address, the origin address is mapped to the wrapped Ether (WETH) contract address to ensure accurate pricing.
- **Key fields**: `amount`, `originAddress`, `destinationNetwork`, `globalIndex`

### Component B: Vault bridge balance tracking

- **Purpose**: Tracks assets bridged to Katana Chain via external vault mechanisms
- **Logic**: Asset balances are tracked for a specific set of bridge vault addresses on Ethereum. Daily balances are calculated by aggregating ERC-20 `Transfer` events and native asset transfers to and from these identified vault addresses. This component captures the value of assets like USDC, WBTC, USDT, ETH, and USDS held in the Katana Network bridge vaults.
- **Key fields**: `account_address`, `token_address`, `amount`

### Component C: Net flow and cumulative aggregation

- **Purpose**: Determines the total value held in the canonical bridge over time
- **Logic**: Daily net flows for the Agglayer bridge are calculated by subtracting the value of claims from the value of deposits. These net flows are aggregated by asset and then cumulated chronologically to determine the total balance held in the bridge contract for any given day.
- **Key fields**: `timestamp`, `token_address`, `amount`

### Component D: USD conversion and final aggregation

- **Purpose**: Normalizes all bridge values to USD and combines data streams
- **Logic**: The cumulative balances from the Agglayer bridge and the daily balances from the bridge vaults are combined. All asset amounts are normalized by decimal precision and multiplied by end-of-day price feeds. A fill-forward strategy is applied to the cumulative totals to ensure data continuity for days without transaction activity. The final metric is aggregated to provide a total USD value of bridge deposits for Katana Chain.
- **Key fields**: `timestamp`, `bridge_deposits`, `price_usd`

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

Value of assets held in a project's bridge contracts.

KatanaKAT

Bridge deposits

Bridge deposits

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Chain breakdown