Liquidity providers deposit funds into Balancer and receive trading fees from traders (supply-side fees). In addition, Balancer provides liquidity providers with additional yield using boosted pools.

Balancer is a non-custodial exchange protocol built on Ethereum. Balancer was founded by Fernando Martinelli and launched in 2018.

BAL tokenholders own and govern the protocol. They currently take a cut of the total trading and yield fees (revenue). Balancer's investors include DeFiance Capital, Three Arrows Capital, Alameda Research, etc.

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Exchanges (DEX)

Balancer

# Balancer Flash loan volume Methodology

## 1. Overview

Flash loan volume measures the total USD value of flash loans executed through Balancer V2 protocols across multiple blockchain networks on a daily basis. Flash loans are uncollateralized loans that must be repaid within the same transaction, and this metric captures the total borrowing activity facilitated by Balancer V2 Vault contracts. The calculation aggregates flash loan amounts in USD terms while tracking associated fees and protocol fee tiers over time.

## 2. Data sources

- **Balancer V2 Vault flash loan events**: Parsed `FlashLoan` events from Balancer V2 Vault contracts across Ethereum, Arbitrum, Avalanche, Base, Gnosis, Optimism, and Polygon networks
- **Protocol fee tier events**: Parsed `FlashLoanFeePercentageChanged` events from Balancer V2 ProtocolFeesCollector contracts tracking fee rate updates over time
- **Transaction data**: Blockchain transaction records providing user addresses and transaction context for each flash loan
- **Token metadata**: Token contract information including decimal precision and symbol data for accurate amount calculations
- **Price feeds**: End-of-day token price feeds providing USD conversion rates for all supported tokens

## 3. Step-by-step calculation

### Component A: Flash loan event extraction
- **Purpose**: Extract raw flash loan data from Balancer V2 Vault contracts across all supported chains
- **Logic**: Query `FlashLoan` events emitted by Balancer V2 Vault contracts when users execute flash loans. Each event contains the borrower address, token address, loan amount (`amount`), and fee amount (`feeAmount`). Create unique identifiers by concatenating block number and log index. Join with transaction data to obtain the actual user address from the transaction `from_address` field. Apply absolute value to amounts to ensure positive values regardless of signed integer representation
- **Key fields**: `token_address` for the borrowed token, `token_amount` for the loan principal, `fee_amount` for flash loan fees, `user_address` from transaction data, and `account_address` as the Vault contract address

### Component B: Protocol fee tier tracking  
- **Purpose**: Track changes to Balancer protocol flash loan fee percentages over time
- **Logic**: Extract `FlashLoanFeePercentageChanged` events from ProtocolFeesCollector contracts which emit when administrators update flash loan fee rates. Convert fee percentages from 18-decimal precision to standard decimal format by dividing by 10^18. Create temporal ranges by calculating the next update ID for each fee tier change, enabling time-based fee tier lookups
- **Key fields**: `protocol_fee_tier` as the fee percentage, `id` and `next_id` for temporal range matching with flash loan events

### Component C: Daily volume aggregation with USD conversion
- **Purpose**: Aggregate flash loan volumes to daily level with proper decimal correction and USD conversion  
- **Logic**: Join flash loan events with token metadata to obtain decimal precision for each token. Correct token amounts by dividing by 10^decimals to get actual token quantities. Join with protocol fee tier updates using ID ranges to apply the correct fee tier that was active at the time of each flash loan. Sum corrected token amounts and fee amounts by day, transaction, and token. Join with end-of-day price feeds to convert token amounts to USD values. Exclude specific tokens like the Gnosis staBAL3 token from volume calculations. Handle missing prices by defaulting to zero USD value
- **Key fields**: `flash_loan_volume` as USD value of loans, `fees` as USD value of flash loan fees, `timestamp` truncated to daily boundaries

### Final aggregation  
- **Combining components**: Flash loan events are enriched with fee tier information and token metadata, then aggregated to daily volumes with USD conversion applied to corrected token amounts
- **Currency conversion**: Token amounts are converted to USD using end-of-day price feeds matched by token address, chain, and date
- **Time aggregation**: All flash loan activity is aggregated to daily boundaries using timestamp truncation, with volumes summed across all loans within each day
- **Final calculation**: The metric represents the total USD value of flash loan principal amounts (excluding fees) executed through Balancer V2 Vault contracts daily, with Optimism chain data excluded to avoid double-counting with Beethoven X metrics. The final output is standardized using the `finalize_metric_flash_loan_volume` macro which applies consistent formatting and zero-filling across time periods and chains.

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

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

BalancerBAL

Flash loan volume

Flash loan volume

Competitive landscape

Chain breakdown