Users deposit and lock assets on Ethereum in exchange for an equivalent amount of a corresponding token on zkSync Era. Conversely, users can withdraw assets from zkSync Era in exchange for the same amount on Ethereum.

zkSync Era Bridge is an asset bridge built on Ethereum and zkSync Era. zkSync Era Bridge was developed by Matter Labs and launched in 2023.

Matter Labs team owns and governs the protocol. Matter Labs' investors include a16z, Lightspeed Venture Partners, Blockchain Capital, etc.

twitter

discord

website

Bridges

zkSync Era Bridge

# zkSync Era Bridge Active users (daily) Methodology

## 1. Overview

Daily active users (DAU) for zkSync Era Bridge measures the number of unique user addresses that interact with the bridge protocol each day. This metric captures all user engagement with the zkSync Era Bridge on Ethereum L1, including both deposit and withdrawal activities. The calculation identifies distinct user addresses from bridge-related events and function calls, then aggregates them by day to provide a comprehensive view of daily user activity.

## 2. Data sources

- **Ethereum zkSync Era Bridge events**: Parsed `DepositInitiated`, `WithdrawalFinalized`, and `EthWithdrawalFinalized` events from the L1ERC20Bridge and Diamond contracts
- **Ethereum transaction data**: Successful `requestL2Transaction` function calls to the Diamond contract
- **Blockchain metadata**: Block timestamps from Ethereum for temporal aggregation

## 3. Step-by-step calculation

### Component A: User interaction extraction
- **Purpose**: Identifies all user addresses interacting with the zkSync Era Bridge and classifies interaction types
- **Logic**: Extracts user addresses from four types of bridge interactions on Ethereum. For `DepositInitiated` events, captures the `from` address as a depositor. For both `WithdrawalFinalized` and `EthWithdrawalFinalized` events, captures the `to` address as a withdrawer. For `requestL2Transaction` function calls, captures the `from_address` as a depositor, filtering only successful transactions where `status` is true. Each interaction is tagged with consistent metadata including chain identifier, market sector as bridges, and business segment as mint_and_burn.
- **Key fields**: `user_address` (the interacting wallet address), `user_type` (Depositor or Withdrawer), `block_timestamp`, `transaction_hash`, `chain`

### Component B: Daily user aggregation  
- **Purpose**: Calculates distinct daily active users by truncating timestamps and deduplicating addresses
- **Logic**: Truncates block timestamps to daily boundaries using day-level granularity. Groups all user interactions by the truncated timestamp and counts distinct user addresses within each day. Preserves user type classification and chain information for each unique user per day. Applies chain availability filtering to ensure data quality.
- **Key fields**: `timestamp` (truncated to day), `user_dau` (the unique user address), `user_type`, `chain`

### Final aggregation
- **Combining components**: The user interaction extraction feeds directly into the daily aggregation component through a single data flow
- **Time aggregation**: Uses timestamp truncation to day boundaries, ensuring all interactions within a 24-hour period are grouped together
- **Final calculation**: Counts each unique user address only once per day, regardless of how many transactions they performed, resulting in the daily active user count for the zkSync Era Bridge

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

Unique revenue-generating users over a fixed 24-hour window.

zkSync Era Bridge

Active users (daily)

Active users (daily)

Competitive landscape

Chain breakdown