Cryptocurrency

Bug in Aave V2 Polygon causes some property to grow to be caught in contracts

May 19, 2023
2 minutes read

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A bug in an older model of crypto lending protocol Aave is obstructing customers from interacting with Wrapped Ether (WETH), Tether (USDT), Wrapped Bitcoin (WBTC) or Wrapped Matic (WMATIC) swimming pools on Aave V2 Polygon, stopping property from being withdrawn from them, in response to a Might 19 proposal that makes an attempt to fix the bug by way of a patch. The proposal says that customers are presently unable to “provide extra of these property, borrow, repay, or withdraw.”

Though withdrawals are presently inconceivable, the staff said that funds are “completely protected,” because the bug will be mounted after a governance vote.

The bug solely impacts Aave V2 on Polygon. AaveV3, which is the newest model, stays unaffected, as does V2 deployments to Ethereum or Avalanche.

The damaged code arose due to a Might 16 rate of interest curve patch applied to all deployments of V2. The Polygon implementation of V2 makes use of a barely completely different record of perform definitions (referred to as an “interface”) for its price technique contracts in comparison with the Ethereum and Avalanche implementations. However the rate of interest curve modifications didn’t bear in mind this distinction, inflicting the bug to develop solely within the Polygon deployment.

The brand new proposal asks Aave’s governing physique, Aave DAO, to approve code modifications to solely the Polygon model to repair the patch. Voting is scheduled to start on Might 20, and can proceed till Might 23, the proposal said.

Associated: Aave DAO votes for ‘rescue plan’ to save lots of misplaced tokens

Aave is most well-known for its flash mortgage characteristic that permits customers to borrow crypto, make trades, and pay again the loans inside the identical block with out requiring collateral. It started on Ethereum, however has been increasing into different networks over the previous few years. On April 17, Aave governance voted to deploy the protocol on zkSync Period, a layer 2 of Ethereum that makes use of zero-knowledge proof know-how. On Might 8, Aave V3 deployed to the Metis community, which can be a layer 2 of Ethereum.