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Unichain

# Unichain Bridge deposits Methodology

## 1. Overview

Bridge deposits represents the total USD value of tokens held in Ethereum bridge contracts that facilitate transfers to Unichain. This metric measures the assets locked on Ethereum that have been bridged to Unichain, providing insight into the economic activity and adoption of the Unichain L2 network. The calculation aggregates token balances across three specific Ethereum addresses that serve as bridge contracts, converting all holdings to USD values.

## 2. Data sources

The calculation relies on several key data sources:
- **Blockchain events**: Parsed Ethereum `Transfer` events to track token movements into and out of bridge contracts
- **Transaction data**: Ethereum transaction logs and traces to capture bridge-related operations and interactions
- **External data**: End-of-day token price feeds for USD conversion of all token holdings
- **Token metadata**: Token contract information including decimal places and symbols for proper amount normalization
- **Account data**: Ethereum account balance snapshots and portfolio tracking data for the specified bridge addresses

## 3. Step-by-step calculation

### Component A: Portfolio tracking
- **Purpose**: Track token balances across the three key Unichain bridge addresses on Ethereum
- **Logic**: The calculation monitors token holdings in three specific Ethereum addresses: `0x81014f44b0a345033bb2b3b21c7a1a308b35feea`, `0x0bd48f6b86a26d3a217d0fa6ffe2b491b956a7a2`, and `0x08ba0023ed60c7bd040716dd13c45fa0062df5c5` (identified as ETHLocker). For each address, the system processes all incoming and outgoing token transfers using parsed `Transfer` events, maintains running balances for each token type over time, and captures balance snapshots at regular intervals
- **Key fields**: The `balance` field represents the token amount held at each timestamp, with amounts normalized using each token's decimal specification

### Component B: USD conversion and normalization  
- **Purpose**: Convert all token balances to USD equivalents for consistent aggregation
- **Logic**: Each token balance is converted to USD using end-of-day price feeds, with token amounts first normalized according to their decimal specifications. The system handles various token types including ETH and ERC-20 tokens, applying appropriate decimal adjustments before price conversion
- **Key fields**: The converted `balance` values represent USD-equivalent amounts for each token holding

### Component C: Business metadata application
- **Purpose**: Add business classification and dimensional data to the portfolio values
- **Logic**: Each portfolio record receives business metadata including chain identifier set to ethereum, market sector classified as blockchains_l2 to indicate L2 bridge activity, business segment marked as blockchain, and product identifier left as null since this represents aggregate bridge activity rather than a specific product
- **Key fields**: `chain_id`, `market_sector_id`, `business_segment_id`, and `product_id` fields for business classification

### Final aggregation
- **Combining components**: All USD-converted token balances across the three bridge addresses are summed together to produce the total bridge deposits value for each time period
- **Currency conversion**: All amounts are converted to USD using end-of-day price feeds, ensuring consistent currency representation across different token types
- **Time aggregation**: Values are aggregated by timestamp and timestamp grain, maintaining time series continuity for the metric
- **Final calculation**: The final `bridge_deposits` value represents the total USD value of all tokens held in the Unichain bridge contracts at each point in time, with forward-filling applied to handle any gaps in the time series data and chain availability filters applied to ensure data quality

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

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

UnichainUNI

Bridge deposits

Bridge deposits

Competitive landscape

Chain breakdown