Flash loan volume

Overview

Flash loan volume measures the total value of assets borrowed and repaid within the same transaction through a DeFi project. Since users pay a fee on each flash loan, this metric tends to correlate with the project's ability to generate fees & revenue from arbitrage-based activity.

Data sources

• Smart contract events capturing flash loan executions and borrowed amounts
• Factory and pool creation events for trading pair metadata
• Token price feeds for USD conversion
• Token metadata for decimal precision

Common calculation approaches

Liquidity pool and vault event extraction

Flash loan activity is aggregated from dedicated events emitted by liquidity pools or central vault contracts. For example, Flash events are captured from Uniswap V3 and SushiSwap V3 pools, while FlashLoan events are extracted from the Balancer V2 Vault. These logs provide the raw amounts for each token borrowed, which are then normalized by decimal precision.

Multi-token volume aggregation

In decentralized exchange architectures, volume is often derived by summing the USD value of all tokens involved in a single flash loan transaction. For projects including PancakeSwap V3 and QuickSwap, the amounts for both tokens in a trading pair are aggregated and converted to USD using end-of-day prices to determine the total economic value of the loan.

Protocol fee and configuration tracking

To accurately reflect the economic impact of flash loans, volume data is often synchronized with protocol fee configurations. For instance, FlashLoanFeePercentageChanged events are tracked from Balancer V2 and Beets contracts to monitor the fee tiers applied to borrowing activity, ensuring the volume aligns with the protocol's revenue-generating parameters.

Note: The calculation approaches and protocol examples above are representative patterns. Individual protocol implementations may vary.