twitter

website

discord

Blockchains (L3)

Sanko

# Sanko Bridge deposits Methodology

## 1. Overview

Bridge deposits for Sanko represent the total value of all tokens held in designated bridge contract addresses on Arbitrum. This metric measures the total value locked (TVL) in Sanko's bridging infrastructure, providing insight into cross-chain activity and user funds deposited for bridging operations. The calculation tracks token balances across specific bridge addresses and converts them to USD values.

## 2. Data sources

The calculation uses several types of blockchain and external data:

- **Arbitrum blockchain events**: Parsed `Transfer` events from ERC-20 token contracts to track token movements into and out of bridge addresses
- **Transaction data**: Arbitrum transaction logs and traces to identify balance changes and token interactions
- **Token metadata**: Contract information including token decimals, symbols, and contract addresses for proper balance calculation
- **Price feeds**: End-of-day token price feeds for USD conversion of token balances
- **Chain availability data**: Operational status information for Arbitrum to filter results when the chain is unavailable

## 3. Step-by-step calculation

### Component A: Portfolio balance calculation
- **Purpose**: Calculate the current token balances held across all designated bridge addresses
- **Logic**: The system identifies two specific Arbitrum addresses (`0x2f285781b8d58678a3483de52d618198e4d27532` and `0xb4951c0c41cfceb0d195a95fe66280457a80a990`) as Sanko's bridge deposit addresses. For each address, it processes all `Transfer` events to track token inflows and outflows, building a complete transaction history. Daily balance snapshots are created for each token at each address by calculating net transfers up to each day. The calculation properly handles token decimals using metadata to convert raw blockchain amounts to human-readable token quantities.
- **Key fields**: The `balance` field represents the token amount held at each address, adjusted for proper decimals and aggregated across all tokens

### Component B: Business context addition
- **Purpose**: Add dimensional data and business classification to the balance data
- **Logic**: Each balance record is tagged with business-relevant dimensions. The `chain_id` is set to identify Arbitrum as the source blockchain. The `market_sector_id` is set to `blockchains_l3` to classify Sanko as a Layer 3 blockchain. The `business_segment_id` is set to `blockchain` to categorize this as blockchain infrastructure. The `product_id` is left null as this represents aggregate bridge activity rather than a specific product. Data is grouped by timestamp, timestamp grain, and these business dimensions.
- **Key fields**: The `bridge_deposits` field contains the sum of all token balances across both bridge addresses

### Component C: USD conversion and finalization
- **Purpose**: Convert token balances to USD and apply final formatting and data quality measures
- **Logic**: Token balances are converted to USD using end-of-day price feeds, with proper decimal adjustment for each token type. Missing data points are filled forward using the most recent available value to ensure continuous time series data. The system applies data quality filters and standardizes the output format according to Token Terminal's metric standards.
- **Key fields**: The final `bridge_deposits` value represents the total USD value of all tokens held in Sanko's bridge addresses

### Final aggregation
- **Combining components**: All token balances across both designated bridge addresses are summed together to create a single bridge deposits value for each time period
- **Currency conversion**: Token amounts are converted to USD using end-of-day price feeds, with each token's decimal places properly handled during conversion
- **Time aggregation**: Data is aggregated by day based on timestamp boundaries, creating daily snapshots of total bridge deposits
- **Final calculation**: The metric represents the sum of USD values of all token balances held in the two specified Arbitrum bridge addresses, filtered by chain availability status to exclude periods when Arbitrum data is unavailable

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

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

Sanko

Bridge deposits

Bridge deposits

Competitive landscape

Chain breakdown