
The bug only affects the Polygon implementation, and V3 is unaffected
A bug in an older version of crypto lending protocol Aave is blocking users from interacting with Wrapped Ether (WETH), Tether (USDT), Wrapped Bitcoin (WBTC) or Wrapped Matic (WMATIC) pools on Aave V2 Polygon, preventing assets from being withdrawn from them, according to a May 19 proposal that attempts to fix the bug through a patch. The proposal says that users are currently unable to "supply more of those assets, borrow, repay, or withdraw."
Although withdrawals are currently impossible, the team stated that funds are "perfectly safe," as the bug can be fixed after a governance vote.
.@AaveAave the latest upgrade of ReserveInterestRateStrategy in Aave V2 (Polygon) has caused a temporary halt of the protocol, impacting assets worth ~$110M!
— BlockSec (@BlockSecTeam) May 19, 2023
The root cause is the new ReserveInterestRateStrategy is only compatible with Ethereum, not compatible with Polygon. https://t.co/kg5696QNPo pic.twitter.com/Ze3zSBS8Ck
The bug only affects Aave V2 on Polygon. AaveV3, which is the most recent version, remains unaffected, as does V2 deployments to Ethereum or Avalanche.
The broken code arose because of a May 16 interest rate curve patch applied to all deployments of V2. The Polygon implementation of V2 uses a slightly different list of function definitions (called an “interface”) for its rate strategy contracts when compared with the Ethereum and Avalanche implementations. But the interest rate curve changes did not take into account this difference, causing the bug to develop only in the Polygon deployment.
The new proposal asks Aave’s governing body, Aave DAO, to approve code changes to only the Polygon version to fix the patch. Voting is scheduled to begin on May 20, and will continue until May 23, the proposal stated.
Related: Aave DAO votes for ‘rescue plan’ to save lost tokens
Aave is most well known for its flash loan feature that allows users to borrow crypto, make trades, and pay back the loans within the same block without requiring collateral. It began on Ethereum, but has been expanding into other networks over the past few years. On April 17, Aave governance voted to deploy the protocol on zkSync Era, a layer 2 of Ethereum that uses zero-knowledge proof technology. On May 8, Aave V3 deployed to the Metis network, which is also a layer 2 of Ethereum.
GHO would allow users to borrow the stablecoin while still learning yield on their locked assets on Aave, however the proposal is just seeking feedback at this stage.
Decentralized finance (DeFi) giant Aave has unveiled plans to launch an overcollateralized stablecoin called GHO, subject to the community DAO’s approval.
The announcement was made by Aave Companies — the centralized entity supporting the Aave protocol on its Twitter page on July 7, stating:
"We have created an ARC for a new decentralized, collateral-backed stablecoin, native to the Aave ecosystem, known as GHO."
According to the governance proposal shared on Thursday, GHO would be an Ethereum-based and decentralized stablecoin pegged to the U.S. dollar (USD) that could be collateralized with multiple assets of the user’s choice.
To obtain GHO, users would need to mint the stablecoin against their deposited collateral however, the list of supported collateralized assets and the collateral ratio has yet to be detailed.
As users are essentially borrowing the stablecoin against their holdings, the position will need to be overcollateralized as per any normal Aave loan.
“With community support, GHO can be launched on the Aave Protocol, allowing users to mint GHO against their supplied collaterals. GHO would be backed by a diversified set of crypto-assets chosen at the users’ discretion, while borrowers continue earning interest on their underlying collateral.”
The proposal notes that 100% of the interest payments accrued by GHO minters would be “directly transferred to the AaveDAO treasury; rather than the standard reserve factor collected when users borrow other assets.”
Holders of the staked AAVE token (stkAAVE) would also benefit from the stablecoin’s adoption, as Aave Companies has proposed that they would also be able to mint and borrow GHO at a discounted rate.
“If the community votes positively for the deployment of the protocol creating the ability for users to mint GHO, a recommended starting interest rate and discount rate will be proposed,” the team stated, adding that an audit would happen over the next few weeks if all goes to plan.
Aave founder Stani Kulechov stated via Twitter that the team has a broader vision of the USD-pegged asset:
“While GHO would be secured by the assets on the Ethereum market, the main vision for GHO is to pursue organic adoption via L2s to solve real life payment opportunities across the internet and on-ground.”
BREAKING: The @AaveAave team submitted ARC to launch a self-sovereign overcollateralized stablecoin GHO backed by the Aave Protocol collaterals https://t.co/YHpLmipLjl
— stani.lens (,) (@StaniKulechov) July 7, 2022
Aave is an automated DeFi protocol that enables users to lend and borrow digital assets without needing to go through or obtain approval from a centralized intermediary. The latest proposal to the DAO has coincided with Aave's native token AAVE gaining 15.04% over the past 24 hours to sit at $72.31 at the time of writing.
Related: Web3 will unite users from social media platforms, says Aave exec
According to data from DeFi Llama, Aave is the second-largest DeFi platform in terms of total value locked (TVL) at $6.76 billion. The ecosystem is based on Ethereum and also supports multiple Layer 2s including Polygon, Optimism and Arbitrum.