BOB batches users' transactions and submits them to Ethereum, paying a share of the transaction fees to Ethereum validators (expense).

BOB is an L2 smart contract platform for decentralized applications on Ethereum. BOB was founded by Alexei Zamyatin and Dominik Harz and launched in 2024.

BOB team & investors own and govern the protocol. BOB's investors include Castle Island Ventures, IOSG Ventures, Coinbase Ventures, etc.

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BOB (Build on Bitcoin)

# BOB (Build on Bitcoin) Bridge deposits Methodology

## 1. Overview

Bridge deposits represents the total USD value of all tokens held in BOB's Ethereum bridge contracts at the end of each day. This metric measures the amount of value that users have deposited into BOB's Layer 2 bridge infrastructure, indicating both user adoption and the total value locked in the bridging system. The calculation tracks token balances across four specific Ethereum addresses that serve as BOB's bridge contracts.

## 2. Data sources

- **Ethereum token transfer events**: Parsed `Transfer` events from Ethereum showing token movements in and out of bridge addresses
- **Token metadata**: Contract addresses, decimal places, and token symbols for proper balance calculations  
- **End-of-day token price feeds**: USD prices for all tokens to enable value conversion
- **BOB bridge contract addresses**: Four specific Ethereum addresses that handle bridge operations
- **Daily timestamp boundaries**: Date ranges for aggregating balances into daily snapshots

## 3. Step-by-step calculation

### Component A: Bridge address identification
- **Purpose**: Define the scope of BOB's bridge infrastructure on Ethereum
- **Logic**: Four specific Ethereum contract addresses are identified as BOB's bridge infrastructure: `0x3f6ce1b36e5120bbc59d0cfe8a5ac8b6464ac1f7`, `0x091df5e1284e49fa682407096ad34cfd42b95b72`, `0x450d55a4b4136805b0e5a6bb59377c71fc4facbb`, and `0x61dc14b28d4dbcd6cf887e9b72018b9da1ce6ff7`. These addresses represent the complete set of contracts that hold user deposits during the bridging process
- **Key fields**: `account_addresses` containing the four bridge contract addresses

### Component B: Portfolio balance calculation  
- **Purpose**: Calculate the token balances held at each bridge address over time
- **Logic**: Token transfer events are processed to build running balance snapshots for each token held at the bridge addresses. The system tracks all `Transfer` events where the bridge addresses are either senders or receivers, maintaining accurate balance calculations by processing inflows (when bridge addresses receive tokens) and outflows (when bridge addresses send tokens). Daily snapshots capture the end-of-day balance for each token at each address
- **Key fields**: `balance` representing the token amount held, `timestamp` for daily boundaries, `chain` identifying Ethereum as the source blockchain

### Component C: Balance aggregation
- **Purpose**: Combine balances across all bridge addresses and add business classification
- **Logic**: Token balances from all four bridge addresses are summed together for each day to create a single aggregate balance per token. Business metadata is added including chain identification as Ethereum, market sector classification as Layer 2 blockchains, business segment as blockchain infrastructure, and null product identification since this represents the overall bridge rather than a specific product
- **Key fields**: `bridge_deposits` as the aggregated balance amount, `chain_id` as 'ethereum', `market_sector_id` as 'blockchains_l2', `business_segment_id` as 'blockchain'

### Final aggregation
- **Combining components**: All token balances held across the four bridge addresses are summed into a single daily total
- **Currency conversion**: Token balances are converted from native token amounts to USD values using end-of-day token prices, with proper decimal adjustment based on each token's decimal precision
- **Time aggregation**: Daily snapshots are created using end-of-day boundaries, ensuring consistent timing across all calculations
- **Final calculation**: The metric represents the total USD value of all tokens held in BOB's bridge contracts at the end of each day, calculated as the sum of (token_balance × token_price_usd) across all tokens and bridge addresses, with forward-filling applied to maintain continuous time series data for days with no balance changes

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

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

BOB (Build on Bitcoin)BOB

Bridge deposits

Bridge deposits

Competitive landscape

Chain breakdown