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Home Articles

An Overview of Aave Protocol: Security and Features

13 July 2022
in Articles, Opinion
Reading Time: 7 mins read
109 1
An-Overview-of-Aave-Protocol-Security-and-Features

Decentralized Finance has been growing tremendously recently and is currently being compared with traditional finance. DeFi protocols focus on different areas. Some are designed to be decentralized insurance platforms, such as Nexus Mutual. DeFi insurance involves obtaining insurance coverage against losses in the decentralized finance space for oneself or a DeFi protocol.  

It may come in the form of a DEX, a DeFi platform that allows users to swap tokens without the presence of a centralized authority, such as UniSwap and Pancakeswap.  

DeFi protocols may also come in the form of GameFi platforms. This ecosystem is focused on incorporating financial architecture into gaming.

A DeFi protocol may also offer crypto lending services to its users. Crypto enthusiasts may have idle funds in their wallets that they are not trading or staking and decide to offer them up as liquidity to a crypto lending platform. In return, the crypto lending platform pays them the interest earned from lending funds to borrowers.

This article analyzes a notable player in the decentralized lending game, Aave Protocol, and its features. 

Aave: A Brief Origin Story

Aave didn’t begin at its current stage; its origin can be traced back to 2017. Some developers led by Stani Kulechov decided to create a lending platform called ETHLend. In 2017, these developers organized an Initial Coin Offering (ICO) for the project.  

ETHLend was intended to be a platform that connected lenders and borrowers by allowing users to post loan offers and requests. Those with extra funds who wanted to lend them out posted offers, while those in need of loans posted requests. 

ETHLend drew users’ attention due to its novelty, but usage declined following the 2018 bear market. In 2020, the team decided to rebrand ETHLend as Save and modify its operations, including adding a smart contract to its architecture.

What is Aave?

Aave ticks the boxes of a decentralized lending protocol, offering crypto lending services to users without the involvement of any centralized authority. In this DeFi protocol, users who offer their idle funds for lending are rewarded with interest, while those who borrow have to pay interest. 

Aave is an open-source DeFi protocol based on the Ethereum blockchain, and since it is a decentralized lending platform, it utilizes smart contracts to control the ecosystem. When users want to lend their idle tokens, the smart contract oversees the transaction, and the same happens for borrowers. 

AAVE is the native token of this ecosystem, and it grants the holders the right to participate in the governance process. They can submit proposals and vote on them. 

How Does Aave Work? 

Decentralized lending platforms come in different forms. Some may offer flash loans, and others may be over-collateralized loans. In flash loans, there is an absence of collateral in the transaction. The lending protocol does not require the borrower to submit collateral before accessing the loan. Usually, the lender takes out the loan, uses it for a purpose, and pays it back in the same transaction. 

Everything is done in one transaction. In the event that the borrower is unable to repay the loan, the transaction is reversed. The Aave Protocol is an overcollateralized lending platform, meaning that borrowers are expected to offer collateral with more value than the loan they want. 

Aave is an algorithmic money market, which means that the loans are accessed from liquidity pools instead of peer-to-peer transactions. The borrower is expected to deposit a collateral amount greater than the loan they wish to obtain. In this case, the lender offers their idle tokens to the pool for a while, hoping to earn interest in return. 

The interest rate charged is based on the level of usage of the funds in the liquidity pool. Let’s say that a pool has attracted a high level of borrowers; the utilization rate will be higher, meaning that the interest rate charged will be lucrative to attract more lenders to deposit their idle tokens. 

One element that borrowers have to consider when depositing collateral is liquidation. The crypto market is highly volatile, meaning that the value of cryptocurrencies falls and rises sharply. 

Since Aave utilizes the over-collateralization concept, the smart contract expects that the value of the collateral deposited by the borrower should not fall below a certain threshold. If the collateral value falls below the collateralization threshold or ratio, it may end up being liquidated. 

If liquidation occurs, the user loses their collateral. This implies that borrowers must always keep an eye on their collateral value and add more assets if necessary. 

Aave has tens of pools for assets based on the Ethereum chain, such as USD, USDT, and DAI. It also caters to assets outside the Ethereum chain. 

This DeFi protocol takes it up a notch by creating pools for real-world assets such as cargo and real estate, allowing the tokenization of these assets.

What is Aave’s Security Architecture?

Aave Protocol uses different systems to secure its operations, and one of them is done via the “incentivization of AAVE holders to lock tokens into a Smart Contract-based component called the Safety Module (SM).”

If a Shortfall Event occurs in the Aave ecosystem, the smart contract uses the locked AAVE tokens to mitigate the effects of the event.

“Shortfall Event occurs when there is a deficit. The interpretation for the occurrence of a Shortfall Event is subject to the Protocol Governance vote.”

When a Shortfall Event occurs, a portion of the locked AAVE is auctioned on the open market to reduce the effects of the deficit. To ensure that the market is not flooded with AAVE, which may reduce the value of this token, a “backstop mechanism” is built into Aave Protocol. 

It is important to note that those who lock their AAVE agree that a Shortfall Event may occur, leading to the locked tokens being sold. Aave offers incentives to those that lock their AAVE tokens. 

Aave’s safety module is divided into multiple parts, which will be described below. 

Staking Module

In this part, holders of AAVE tokens can lock them to protect the DeFi platform. By staking the token, the user knows that the staked tokens can be sold during a Shortfall Event. 

Auction Module

In this module, the staked assets are auctioned when a Shortfall Event occurs. Immediately after this event happens, this module is triggered.  

Backstop Module

The backstop module is the component that “maintains an ongoing incentivized bid for minted or slashed AAVE to recapitalize the protocol in case of Shortfall Event.”

Ecosystem Reserve

This component is meant to oversee fees receiving, management, and distribution in Aave markets. 

Oracles

To ensure that it has access to real-time data, the Aave Protocol Oracle System uses Chainlink oracles. This allows the smart contract to know when a Shortfall Event has occurred. 

What are common shortfall events?

The common shortfall events are linked to “unexpected loss of funds” which may arise from the following. 

Smart contract risk

Aave Protocol is a decentralized ecosystem that is controlled by smart contracts. These smart contracts are pieces of code, and there is the risk that a bug could affect them. 

Liquidation risk

When liquidation occurs, liquidators have to swing in quickly. In the case that this does not happen, there could be a loss of funds, which leads to a Shortfall Event. 

Sometimes, the market may have a low level of liquidity, which may degenerate into a Shortfall Event. 

Oracle failure risk

Smart contracts depend on oracles to access the necessary information to make a real-time decision. For instance, the smart contracts on Aave Protocol depend on oracles, and sometimes, the oracle system may not update the prices in real-time. Sometimes, it may submit the wrong prices, resulting in wrong liquidations. 

In Conclusion,

  • Aave ticks the boxes of a decentralized lending protocol offering crypto lending services to users without the presence of any centralized authority.
  • AAVE is the native token of this ecosystem and grants holders the right to participate in the governance process.
  • Stani Kulechov created Aave in 2020.
  • It was initially called ETHLend, before its rebranding.
  • Aave is an overcollateralized decentralized lending platform that is governed by smart contracts. 
  • Aave Protocol incorporates a safety mechanism into its architecture to ensure that it functions effectively.

 

If you would like to read more articles like this, visit DeFi Planet and follow us on Twitter, LinkedIn, Facebook, and Instagram.

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