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Blockchains (L2)

Fuel Ignition

# Fuel Ignition Bridge deposits Methodology

## 1. Overview

Bridge deposits measures the total USD value of all tokens currently held in Fuel Network's bridge contracts on Ethereum. This metric tracks the total value locked (TVL) in the bridging infrastructure that enables users to transfer assets from Ethereum to the Fuel Network Layer 2 blockchain. The calculation aggregates balances of all tokens (both ERC20 tokens and native ETH) held in the designated bridge contract addresses and converts them to USD using end-of-day price feeds.

## 2. Data sources

The calculation relies on several key data sources:

- **Ethereum transaction logs**: Raw transaction data from the Ethereum blockchain to track all token movements
- **Ethereum ERC20 transfer events**: Parsed `Transfer` events for all ERC20 tokens to identify token movements into and out of bridge addresses  
- **Ethereum native ETH transfers**: Native ETH transfer data from transaction traces and internal transactions
- **End-of-day token price feeds**: Token prices in USD for converting balances to dollar values
- **Token metadata**: Token contract information including decimal places, symbols, and contract addresses
- **Chain availability data**: Blockchain operational status information for data quality filtering

## 3. Step-by-step calculation

### Component A: Bridge address identification
- **Purpose**: Defines the specific Ethereum addresses that serve as Fuel Network bridge contracts
- **Logic**: The calculation focuses on two hardcoded Ethereum addresses: `0xa4ca04d02bfdc3a2df56b9b6994520e69df43f67` and `0xaeb0c00d0125a8a788956ade4f4f12ead9f65ddf`. These addresses represent the official bridge contracts used by Fuel Network to lock assets on Ethereum while users receive corresponding assets on the Fuel Network Layer 2
- **Key fields**: `account_addresses` containing the bridge contract addresses on Ethereum

### Component B: Portfolio balance calculation
- **Purpose**: Calculates the current token balances held in the bridge addresses across all tokens
- **Logic**: Processes all token transfer events (both ERC20 `Transfer` events and native ETH transfers) that involve the bridge addresses. For each token, the system sums all inbound transfers to the bridge addresses and subtracts all outbound transfers to determine net balances. This creates a comprehensive view of all assets currently locked in the bridge contracts. The calculation handles both ERC20 tokens and native ETH transfers through transaction traces
- **Key fields**: `balance` representing the net token amount for each asset, `timestamp` for temporal tracking, `chain` identifying Ethereum as the source blockchain

### Component C: USD conversion and decimal correction
- **Purpose**: Converts token balances to USD values with proper decimal handling
- **Logic**: Takes the raw token balances and applies decimal corrections using token metadata to convert from wei/smallest unit to readable token amounts. Then multiplies by end-of-day USD prices to get dollar values. The decimal correction accounts for different tokens having different decimal places (e.g., USDC has 6 decimals, WETH has 18 decimals)
- **Key fields**: Normalized `balance` amounts and USD-converted values using `price` from end-of-day feeds

### Component D: Business metadata addition
- **Purpose**: Adds classification metadata for business intelligence and reporting
- **Logic**: Enriches the data with standardized business categories including `market_sector_id` set to 'blockchains_l2' to classify Fuel Network as a Layer 2 solution, `business_segment_id` set to 'blockchain' for the overall business category, and `product_id` left null as this represents overall bridge activity rather than a specific product
- **Key fields**: `market_sector_id`, `business_segment_id`, `product_id` for business classification

### Final aggregation
- **Combining components**: Sums the USD values of all individual token balances held in the bridge addresses to create a single total bridge deposits value. The aggregation groups by timestamp, chain, and business metadata while summing all token balances
- **Currency conversion**: Uses end-of-day token price feeds for USD conversion, ensuring consistent daily valuation timing across all tokens
- **Time aggregation**: Applies daily timestamp boundaries with forward-fill strategy to maintain continuity in the time series, filling gaps where no new data is available with the previous day's values
- **Final calculation**: The final metric represents the total USD value of all tokens currently locked in Fuel Network's Ethereum bridge contracts, calculated as the sum of (token_balance × token_usd_price) across all tokens held in the bridge addresses, with forward-fill applied for missing data points and filtered for chain availability 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.

Fuel IgnitionFUEL

Bridge deposits

Bridge deposits

Competitive landscape

Chain breakdown