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Blockchains (L2)

Arbitrum Nova

# Arbitrum Nova Bridge deposits Methodology

## 1. Overview

Bridge deposits for Arbitrum Nova measures the total USD value of tokens held in Ethereum bridge contracts that facilitate deposits to the Arbitrum Nova Layer 2 network. This metric tracks the amount of value locked in bridge infrastructure as users move funds from Ethereum mainnet to Arbitrum Nova. The calculation aggregates token balances across three specific Ethereum bridge addresses and converts them to USD values.

## 2. Data sources

- **Ethereum token balance data**: Daily snapshots of token balances for specific bridge contract addresses on Ethereum mainnet
- **Ethereum transaction data**: Transaction traces and logs to track balance changes over time
- **End-of-day token price feeds**: USD conversion rates for all tokens held in bridge addresses
- **Token metadata**: Token decimals, symbols, and contract information for proper balance calculations
- **Chain availability data**: Operational constraints and data availability periods for filtering

## 3. Step-by-step calculation

### Component A: Bridge address portfolio calculation
- **Purpose**: Calculates the total token balances held across Arbitrum Nova bridge addresses on Ethereum
- **Logic**: Identifies three specific Ethereum addresses that serve as bridge contracts for Arbitrum Nova deposits. For each address, retrieves all token balances across all available timestamps. The addresses are `0xb2535b988dce19f9d71dfb22db6da744acac21bf`, `0xa2e996f0cb33575fa0e36e8f62fcd4a9b897aad3`, and `0xc1ebd02f738644983b6c4b2d440b8e77dde276bd`. Token balances are corrected for decimal places and converted to USD using end-of-day price feeds.
- **Key fields**: `balance` (USD value of tokens), `timestamp` (daily snapshots), `chain` (Ethereum chain identifier)

### Component B: Business metadata enrichment
- **Purpose**: Adds business classification and aggregates balances across all bridge addresses
- **Logic**: Takes the portfolio data and adds standardized business metadata including market sector classification as `blockchains_l2` and business segment as `blockchain`. Sets product identifier as null since this is a chain-level metric. Sums all token balances across the three bridge addresses to get total bridge deposits value for each timestamp.
- **Key fields**: `bridge_deposits` (total USD value), `market_sector_id`, `business_segment_id`, `timestamp_grain`

### Final aggregation
- **Combining components**: All token balances from the three bridge addresses are summed together for each timestamp to create a single bridge deposits value
- **Currency conversion**: Token balances are converted to USD using end-of-day price feeds, with proper decimal adjustments based on token metadata
- **Time aggregation**: Data is processed at daily intervals using timestamp grain logic
- **Final calculation**: The final metric represents the total USD value of all tokens held in Arbitrum Nova bridge contracts on Ethereum at each point in time. Missing values are forward-filled to ensure continuous time series data, and results are filtered based on chain data availability periods.

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

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

Arbitrum Nova

Bridge deposits

Bridge deposits

Competitive landscape

Chain breakdown