[ARC] Deploy Aave V3 on Cronos chain

[ARC] Deploy Aave V3 on Cronos chain


Launched in 2021 after years of open-source R&D, Cronos is #9 public blockchain by DeFi value locked according to Defillama (around 2.5 B$ TVL to date). Cronos proposes to deploy Aave V3 to the Cronos chain and to incentivize liquidity in order to help fulfill the promise of a multi-chain future.

Cronos is the first Ethereum-compatible blockchain network built on Cosmos SDK technology. An open-source Layer 1 chain launched under the Crypto.org umbrella, Cronos aims to massively scale the DeFi and dApp (Web3) user community by providing builders with the ability to instantly port apps and crypto assets from other chains while benefiting from low transaction fees, high throughput, and fast finality.

In 2020 and 2021, hundreds of millions of consumers have purchased their first cryptos, the majority via a centralized exchange. Tens of millions of them are Crypto.com customers, holders of CRO or other tokens of the Cosmos ecosystem, and/or Crypto.org project supporters. These crypto users are now eager to take the next step in Web3. For these users, Cronos is a natural gateway into the broader world of self-custody, Ethereum and DeFi.

The cross-chain future that is such an integral part of Aave V3, resonates well with the motivations of Cronos users. Therefore, Cronos represents an ideal ground to demonstrate the promise of Aave V3.

Technical specifications of the network

Network specifications

Cronos is an open-source project launched by Crypto.org that brings together many open-source initiatives of the Ethereum, Cosmos and IBC (Inter Blockchain Communication) ecosystems. At its core, it is a fully EVM-compatible alternative Layer 1 blockchain built using the Cosmos SDK (Ethermint implementation).

Cronos mainnet has been live since November 2021 and is already home to more than 100 partners and more than 340,000 DeFi and NFT users. Cronos is powered by the CRO cryptocurrency, which counts tens of millions of holders and users worldwide thanks to its support by Crypto.com. All key network statistics can be viewed on the Etherscan deployment, called Cronoscan , as well as on Defillama for TVL chart .

At the protocol level, Cronos relies on a Proof of Authority consensus where each validatorā€™s voting power is proportional to their stake in the protocolā€™s staking token. There are currently 26 live validators, with room for more. The consensus delivers fast finality with block times between 5 and 6 seconds, low transaction fees (usually below 1 USD) paid in CRO token, and small environmental footprint.

Users and Dapp developers interact with Cronos primarily through the usual EVM Web3 JSON-RPC endpoints . They can deploy any EVM-compatible smart contract written in Solidity, and can use all the usual end-user and developer tooling: MetaMask, Etherscan block explorer ( Cronoscan ), Gnosis Safe, Truffle, Hardhat, Web3.js, Ethers.js, Web3.py, etc.

The Cronos team is actively in contact with the relevant teams to implement all the components needed for robust Aave V3 deployment and operations, specifically the Chainlink oracle, The Graph indexer, and commercial and JSON-RPC endpoints for Dapps (in addition to the existing free ones ). These teams are in process of assigning engineering resources to work on these projects and target launch date for these additional components is early Q2 2022. Cronos protocol engineering resources stand ready to support these projects.

There are several bridges between Cronos and other networks :

  • Fast withdrawals from and to the Crypto.com app and exchange.
  • Planned native bridge from and to the Ethereum mainnet via Gravity Bridge technology, currently in testing and planned for imminent launch.
  • Live IBC transfers from and to the Crypto.org chain, Cosmos Hub, and Terra, with more IBC-compatible chains on the roadmap.
  • Live EVM smart contract-based transfers from and to BSC, Polygon, and other EVM chains via 3 independent bridges, with more to come.
  • Security review of additional bridges is under way.

Cronos is an open ecosystem supported by a wide range of more than 100 contributors , validators , and Dapp developers . This includes 2 large AMM/DEXes, VVS Finance (1.4 B$ TVL) and MM Finance (320 M$ TVL).

The roadmap is ambitious and includes protocol and database optimizations, further connectivity and interoperability, best-in-class tooling and infrastructure, further protocol governance decentralization, dozens of DeFi and GameFi Dapps, and longer term plans to increase scalability.

Aave V3 implementation

As part of this proposal, Aave V3 will be deployed to Cronos like any Web3 protocol, given that Cronos is fully EVM-compatible. Aave operations will rely on the Chainlink oracle and The Graph indexer (implementation under way).

The Aave V3 Portal will be able to leverage robust EVM-based cross-chain bridges (such as Connext and others, subject to further testing and security review) for the transfer of underlying assets backing aTokens.

Metrics and references

Chain data

  • 26 live validators.
  • 14 M transactions to date (no transaction pumping!)
  • 150,000 to 200,000 transactions per day, with potential to increase by 5x to 20x in the short term.
  • 350,000 unique wallets.
  • More than 75 Dapps deployed in the last 3 months, including VVS (DEX, 1.4 B$ TVL), MM Finance (DEX, 320 M$ TVL), Tectonic (decentralized lending, 275 M$ TVL), and many others.

Audience data


Proposed list of initial collaterals

The proposed list of initial collaterals is: CRO, WETH, WBTC, USDC, USDT, DAI, ATOM, LUNA, DOT.

As indicated above, Chainlink price feeds are being scheduled for deployment.

Cronos already supports the following cross-chain assets : CRO, WETH, WBTC, USDC, USDT, DAI, SHIB, DOGE, ATOM, LINK, ENJ, ELON, TUSD, LUNA, DOT, BIFI, with more to come. Additional native tokens include VVS, TONIC, These tokens have between 10 M$ and 700 M$ of liquidity on Cronos. Daily volume for the corresponding pairs is between 20 and 30 M$.

The proposed tokens have more than, or close to, 2 M$ daily volume each. With respect to DEX statistics, see VVS analytics for history and liquidity per token, and MM Finance analytics for additional pairs.


Particle B, the Web3 accelerator of the Cronos chain, has an initial allocation of USD 100 million in CRO tokens for ecosystem development. A portion of these funds will be allocated to end-user incentives, commensurate with the large user and TVL growth potential of Aave V3 on Cronos.

In our experience, the effectiveness of liquidity mining incentives varies depending on market conditions, hence the exact programs and amounts (expected to be worth several M$ initially) will need to be refined over time.

Audits and security

Cronos mainnet was launched in November 2021 and has not experienced outages so far.

An audit of relevant components of the underlying Ethermint codebase ( crypto , JSON RPC , Ante handler , EVM state transition ) was commissioned by Foris Ltd and completed by Kudelski Security in November 2021, to be published soon.

A bug bounty program is published , with a maximum bounty of 1.3 M$.


Thanks for this detailed proposal.

I think Cronos has natural synergies with Aave V3 and having portals on this network is a win-win for both ecosystems.

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Super exciting stuff! I have been following Cronos closely since its launch and am an active user of the chain. I support this proposal of deploying Aave V3 on Cronos.

Cosmos is growing fast this year with multiple application-base chains launching soon. I believe Cronos being IBC enabled and its cross-chain interoperability between Cosmos<>Ethereum will have strong synergies with Aave V3.

Cronosā€™ fast growing userbase and TVL will also be beneficial for Aave to capture. Looking forward to this.

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Great proposal, only suggestion is to add AAVE as collateral. Avalanche and Matic both had AAVE listed as ā€˜initial collateralā€™ on deployment.

Excellent point @A_J thanksā€¦ Forgot to include AAVE, will do.