Starknet is a Validity-Rollup (ZK-Rollup) Layer 2 network that operates on top of Ethereum, enabling dApps to massively scale without compromising on security. It achieves this by bundling transactions into an off-chain computed STARK proof. This proof is then submitted to Ethereum as a single transaction, resulting in significantly higher throughput, faster processing times, and much lower costs, all while retaining the robust security of the Ethereum settlement layer.

Starknet aims to be governed by a decentralized, community-driven process centered around STRK token holders. While StarkWare originally developed the technology, the network is transitioning to a completely decentralized model where the broader community makes decisions regarding protocol upgrades, development, and the future of the network.

Starknet is a Layer 2 that uses STARK technology to validate off-chain transactions, enabling unlimited scale while preserving Ethereum's security and decentralization.

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# Starknet Bridge deposits Methodology

## 1. Overview

Bridge deposits measures the total USD value of tokens deposited and held in Starknet's bridge contracts on Ethereum. This metric tracks the value locked in StarkGate bridge addresses, representing funds that users have deposited to transfer assets from Ethereum to Starknet. It answers the business question: "How much value is currently locked in Starknet's bridging infrastructure?" The calculation involves monitoring token balances across 14 specific Ethereum bridge contract addresses, converting these balances to USD, and aggregating them into a single metric.

## 2. Data sources

- **Ethereum blockchain event logs**: Parsed `Transfer` events from ERC-20 tokens to track token movements in and out of bridge addresses
- **Ethereum transaction data**: Transaction records to capture balance changes and contract interactions
- **Token transfer events**: Detailed token transfer data for calculating current balances held in each bridge address
- **End-of-day token price feeds**: USD price data for converting token balances to dollar values
- **Token metadata**: Information about token decimals, symbols, and contract addresses for proper balance calculations
- **Chain availability data**: Information about data availability windows for filtering results

## 3. Step-by-step calculation

### Component A: Bridge address identification
- **Purpose**: Define the specific Ethereum contract addresses that hold bridged tokens for Starknet
- **Logic**: The calculation targets 14 StarkGate bridge contract addresses on Ethereum, each corresponding to a different token: `0xae0ee0a63a2ce6baeeffe56e7714fb4efe48d419` for ETH, `0x0437465dfb5b79726e35f08559b0cbea55bb585c` for USDC, `0x283751a21eafbfcd52297820d27c1f1963d9b5b4` for USDT, `0xf6080d9fbeebcd44d89affbfd42f098cbff92816` for WBTC, `0xbb3400f107804dfb482565ff1ec8d8ae66747605` for DAI, `0xbf67f59d2988a46fbff7ed79a621778a3cd3985b` for rETH, `0xcf58536d6fab5e59b654228a5a4ed89b13a876c2` for wstETH, `0xf76e6bf9e2df09d0f854f045a3b724074da1236b` for STRK, `0xdc687e1e0b85cb589b2da3c47c933de9db3d1ebb` for LUSD, `0x66ba83ba3d3ad296424a2258145d9910e9e40b7c` for UNI, `0xd8e8531fdd446df5298819d3bc9189a5d8948ee8` for LORDS, `0xf3f62f23df9c1d2c7c63d9ea6b90e8d24c7e3df5` for FRAX, `0x023a2aac5d0fa69e3243994672822ba43e34e5c9` for FXS, and `0xce5485cfb26914c5dce00b9baf0580364dafc7a4` for sfrxETH
- **Key fields**: Bridge contract addresses and their corresponding token types

### Component B: Portfolio balance calculation
- **Purpose**: Calculate the current token balances held in each bridge address using a portfolio calculation methodology
- **Logic**: Process Ethereum event logs and token transfer events to track all inflows and outflows for each bridge address. Calculate net balances by summing all incoming transfers and subtracting all outgoing transfers for each token type. Apply proper decimal adjustments based on each token's decimal configuration. Track balances over time to maintain current holdings for each bridge address
- **Key fields**: `timestamp`, `chain`, `balance` (in native token units), token contract addresses

### Component C: USD conversion and aggregation
- **Purpose**: Convert all token balances to USD and sum across all bridge addresses
- **Logic**: For each bridge address balance, apply end-of-day token price feeds to convert native token amounts to USD values. Handle decimal adjustments to ensure proper unit conversion. Sum all USD-converted balances across all 14 bridge addresses to get the total bridge deposits value
- **Key fields**: `balance` (converted to USD), `timestamp`, `chain_id`

### Component D: Business categorization
- **Purpose**: Add business context and categorization to the metric data
- **Logic**: Assign business-relevant metadata including `market_sector_id` as 'blockchains_l2' to categorize Starknet as a Layer 2 blockchain, `business_segment_id` as 'blockchain' to indicate this is a blockchain infrastructure metric, and set `product_id` as null since this is a protocol-level metric rather than a specific product
- **Key fields**: `market_sector_id`, `business_segment_id`, `product_id`, `bridge_deposits`

### Final aggregation
- **Combining components**: Sum all USD-converted balances across the 14 bridge addresses to create a single `bridge_deposits` value representing total value locked in Starknet bridges
- **Currency conversion**: Apply end-of-day USD prices to convert each token balance, with proper decimal adjustment for each token type
- **Time aggregation**: Maintain daily time series data with timestamp boundaries aligned to daily periods
- **Final calculation**: The final metric value equals the sum of all USD-converted token balances held in the 14 StarkGate bridge addresses, with forward-fill strategy applied to handle missing data points and chain availability filtering 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.

StarknetSTRK

Bridge deposits

Bridge deposits

Competitive landscape

Chain breakdown