Aave Pay Module

Aave Pay Module is the on-chain payment functionality associated with Aave, a leading decentralized lending and borrowing protocol founded in 2020, headquartered in Switzerland. Aave enables users to lend and borrow cryptocurrencies through liquidity pools governed by smart contracts, earning interest on deposits and borrowing against collateral.

The “Pay” aspect refers to Aave’s on-chain settlement infrastructure and its flash loan capability — a unique DeFi feature allowing atomic, no-collateral borrowing within a single transaction, as long as the borrowed amount is returned by the end of the transaction. This enables complex, atomic payment flows including arbitrage, refinancing and instant settlement that are not possible with traditional payment rails.

Aave is governed by the AAVE token holder community through the Aave DAO. As of August 2026, Aave is one of the largest DeFi lending protocols by total value locked (TVL), operating across multiple chains including Ethereum, Polygon, Arbitrum, Optimism and Avalanche. It is important to note that Aave is a DeFi lending protocol, not a merchant payment gateway — its inclusion in a payment gateway directory reflects its on-chain settlement and flash-loan infrastructure.

Best for: Web3-native users and dApps that need DeFi lending, borrowing or flash-loan-based atomic payment flows. Not suitable for merchant payment processing.

Aave charges a very low protocol fee of approximately 0.01% on certain operations, with the primary cost being underlying network gas. Lending and borrowing rates are determined algorithmically by supply and demand in each liquidity pool.

Cost model

• Protocol fee — approximately 0.01% on certain operations.
• Borrow rates — algorithmic, determined by pool utilization; borrowers pay interest to lenders.
• Flash loan fee — a small fee on flash loans (atomic, single-transaction borrowing).
• Network gas — varies by chain; Layer-2s are cheaper than Ethereum mainnet.

Settlement

• On-chain settlement at chain finality.
• Flash loans settle atomically within a single transaction — if the loan is not repaid, the entire transaction reverts.

Decentralized lending & borrowing

• Lending pools — deposit crypto to earn interest.
• Borrowing — borrow against collateral with algorithmic interest rates.
• Non-custodial — funds remain in user wallets until deposited to a pool.
• No KYC — fully decentralized, no identity verification.

Flash loans

• Atomic, no-collateral borrowing within a single transaction.
• Enables arbitrage, refinancing and instant settlement flows.
• If the loan is not repaid by the end of the transaction, the entire transaction reverts.

Multi-chain

• Ethereum, Polygon, Arbitrum, Optimism, Avalanche and more.