Aave lending pools and aTokens

The essentials

Aave is a liquidity protocol deployed on multiple networks. In the V3 model discussed here, suppliers deposit assets into reserves and borrowers draw liquidity under market rules. Funds are pooled rather than matching every borrower to an individual lender.

How it works

Suppliers receive aTokens representing their supplied position and accrued interest under the protocol’s accounting. Borrowing creates a debt position that also changes with interest. AAVE, an aToken and the underlying asset are different objects with different roles.

What to watch

Withdrawals depend on available liquidity and, where the deposit supports debt, the remaining collateral health. Parameters vary by asset, market and version. Supplying a stablecoin introduces both protocol exposure and stablecoin exposure. Do not assume the mechanics described for V3 apply unchanged to every deployment or future release.

Understand the details

A lending pool combines supplied assets and makes part of them available to borrowers under protocol rules. The supplier receives a claim represented by the protocol’s accounting or receipt token. The underlying assets can be borrowed, so the displayed supply balance is not identical to cash immediately available for every supplier to withdraw at once.

Boundaries and common mistakes

Supplying and enabling collateral are distinct choices. Borrowing creates debt that can accrue interest even while the user is inactive. Each market and network has its own assets, limits and risk settings. A token named similarly on another chain is not automatically the same reserve or an equivalent claim.

The mechanism at a glance

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