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Blockchains (L3)

Proof of Play

# Proof of Play Bridge deposits Methodology

## 1. Overview

Bridge deposits represents the total USD value of tokens held in Proof of Play's bridge contract on Arbitrum. This metric measures the amount of capital locked in the bridge infrastructure that facilitates token transfers between Proof of Play's Layer 3 blockchain and other networks. The calculation tracks token balances in the designated bridge address by processing blockchain transfer events and applying current market prices.

## 2. Data sources

The calculation relies on several key data sources:
- **Arbitrum blockchain events**: Parsed `Transfer` events from ERC-20 tokens on the Arbitrum network to track token movements into and out of the bridge address
- **Token metadata**: Token contract information including decimal places and symbols for proper amount calculations
- **End-of-day price feeds**: Daily USD prices for all tokens to convert token balances to dollar values
- **Daily balance snapshots**: Historical balance data for the bridge address to maintain time series continuity

## 3. Step-by-step calculation

### Component A: Portfolio balance calculation
- **Purpose**: Calculate daily token balances held in the Proof of Play bridge address
- **Logic**: The system processes parsed `Transfer` events on Arbitrum to track all token movements involving the bridge address `0x074ffd20c6d8865752c997f4980cf70f2a3fbac6`. For each token, it calculates net inflows by summing transfers received and subtracting transfers sent. Token amounts are adjusted using the token's decimal places to get actual token quantities. Each token balance is then converted to USD using end-of-day price feeds.
- **Key fields**: `timestamp` for daily aggregation, `chain` identifying Arbitrum, `balance` representing the USD value of tokens held

### Component B: Business metadata addition
- **Purpose**: Add standardized business dimensions for reporting and analysis
- **Logic**: The system enriches the balance data with consistent business categorizations. The chain identifier is set to Arbitrum, the market sector is classified as `blockchains_l3` reflecting Proof of Play's Layer 3 nature, and the business segment is set to `blockchain`. No specific product identifier is assigned since this represents bridge infrastructure rather than a specific product.
- **Key fields**: `chain_id` for blockchain identification, `market_sector_id` and `business_segment_id` for business categorization, `product_id` set to null

### Final aggregation
- **Combining components**: Token balances are summed across all tokens held in the bridge address for each day to produce a single bridge deposits value per timestamp
- **Currency conversion**: All token amounts are converted to USD using end-of-day price feeds before aggregation
- **Time aggregation**: Data is aggregated on daily boundaries using the timestamp field
- **Final calculation**: The bridge deposits metric equals the total USD value of all tokens held in the designated bridge address on each day, with forward-filling applied to maintain continuous time series data

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

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

Proof of Play

Bridge deposits

Bridge deposits

Competitive landscape

Chain breakdown