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XSwap | Data Breakdowns

# XSwap Flash loan volume Methodology

## 1. Overview

Flash loan volume measures the total USD value of flash loans executed on the XSwap decentralized exchange protocol on the XDC blockchain. This metric captures the aggregate value of tokens borrowed and repaid within single transactions, providing insight into the usage of XSwap's flash loan functionality. The calculation combines token amounts from both sides of each flash loan (token0 and token1) and converts them to USD values using end-of-day price feeds.

## 2. Data sources

- **XDC blockchain event logs**: Parsed `Pool_Flash_event` logs from XSwap pools containing flash loan details including borrowed token amounts
- **XDC transaction records**: Transaction data used to identify user addresses and transaction metadata
- **XDC factory event logs**: `Factory_PoolCreated_event` logs (v3) and `Factory_PairCreated_event` logs (v2) used to map pool addresses to their underlying token pairs
- **Token metadata**: Token information including decimal places and symbols for proper amount calculations
- **End-of-day price feeds**: Daily USD price data for tokens involved in flash loans
- **Denylist data**: Hardcoded list of trading pairs excluded due to limited price feed support for low liquidity tokens

## 3. Step-by-step calculation

### Component A: Flash loan event extraction
- **Purpose**: Extract raw flash loan events from XDC blockchain
- **Logic**: Query `Pool_Flash_event` logs from XDC blockchain to capture all flash loan activities. Each event contains the pool address, sender address, and amounts for both tokens involved (`amount0` and `amount1`). Join with XDC transaction records to identify the actual user address (`from_address`). Apply data quality filters to exclude flash loans from denylisted trading pairs that have insufficient price feed coverage for reliable USD conversion.
- **Key fields**: `block_timestamp` for timing, `transaction_hash` and `log_index` for uniqueness, `address` for pool identification, `sender` for contract user, `amount0` and `amount1` for borrowed quantities

### Component B: Trading pair enrichment
- **Purpose**: Map pool addresses to their underlying token pairs and obtain token metadata
- **Logic**: Join flash loan events with trading pair dimensions derived from XDC factory events. For XSwap v3 pools, use `Factory_PoolCreated_event` logs, and for v2 pools, use `Factory_PairCreated_event` logs. This mapping provides the token0 and token1 addresses for each pool, along with their respective decimal places from token metadata. Fee tier information is also captured from the factory events.
- **Key fields**: `token0_address` and `token1_address` for token identification, `token0_decimals` and `token1_decimals` for amount correction, `fee_tier` for pool classification

### Component C: Amount standardization and USD conversion
- **Purpose**: Convert raw token amounts to standardized quantities and USD values
- **Logic**: Correct raw token amounts by dividing by 10 raised to the power of each token's decimal places to get actual token quantities. Aggregate flash loan data by day, transaction hash, and log index. Join with end-of-day price feeds to obtain USD prices for both token0 and token1 on the flash loan date. Multiply each corrected token amount by its corresponding USD price to get the USD value for each token side of the flash loan.
- **Key fields**: `token0_amount` and `token1_amount` as corrected quantities, `price_usd` from price feeds, calculated USD values for each token

### Final aggregation
- **Combining components**: Sum the USD values of token0 and token1 for each flash loan transaction to get total flash loan volume per transaction
- **Currency conversion**: Uses end-of-day price feeds matched by timestamp, token address, and chain for USD conversion
- **Time aggregation**: Data is aggregated at daily level using timestamp truncation to day boundaries
- **Final calculation**: The total flash loan volume equals the sum of (token0_corrected_amount × token0_price_usd) + (token1_corrected_amount × token1_price_usd) for each flash loan, with zero values used when price data is unavailable. The finalize metric macro ensures schema compliance and fills gaps with zero values using a 'fill_zeros' strategy.

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

Total value of assets borrowed and repaid within the same transaction.

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Flash loan volume

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