ChainLink Keepers released a beta offering a fully decentralized service for the smart contract DevOps team

Title: "ChainLink Keepers Open Beta for a Fully Decentralized Service for Smart Contract DevOps Teams"

Original source: Chainlink

On June 8, ChainLink announced the launch of the ChainLink Keepers beta for the first batch of users, and we look forward to getting feedback from the community.

ChainLink Keepers reliably automate contract function and timing maintenance for smart contract developers, decentralized applications (DAPPs), and decentralized autonomous organizations (DAOs) in a decentralized manner. Not only will this be more cost-effective, but it will also allow the DevOps team to create a completely decentralized service as never before. Smart contract applications can access Chainlink Keepers to more effectively guarantee the normal operation of functions on the critical chain, and decentralized automatic execution can be realized from end to end without adding additional layers of trust. ChainLink Keepers will make the infrastructure of DEFI and the entire smart contract economy more robust, scalable and secure greater value for users.

ChainLink Keepers is currently releasing a beta to our first users, so we can gather user feedback in the final phase and continue to improve the decentralized service experience based on user needs. The ChainLink Keepers beta is now available on the official website.

ChainLink Keepers can perform a series of computation, monitoring, and time - and event-based tasks for smart contracts, such as:

· Implement limit orders for decentralized trading platforms.  

· Create tokens as reserves increase.  

· Earn revenue from Vault.  

· Rebase Flexible Supply Token  

· Trigger automatic trading.  

· Liquidate loans with insufficient mortgage rates.  

· Unlock assets at the end of the idle period.  

· Recharge when the token balance is lower than the minimum value.    

ChainLink Keepers is a newly developed decentralized service of ChainLink network. DEFI and other smart contracts can use the Chainlink Keepers as very reliable automated BOTs to perform various smart contract operations. Initially, ChainLink Keepers will serve smart contracts on Ethereum. ChainLink Keeper network and ChainLink Feeder share the same set of node operators. These nodes have a wealth of experience and expertise that currently secure the value of billions of DEFI smart contracts. Therefore, the network activity can be guaranteed to users and the normal execution of critical contract functions. In addition, developers no longer need to perform contract maintenance tasks manually or through a centralized system, thus saving significant time, resources, and risk.

How do ChainLink Keepers enhance smart contract functionality

Smart contracts are made up of code that can run on a blockchain with a high degree of certainty. However, there are two fundamental limitations to smart contracts: 1) the contract cannot access off-chain resources and therefore cannot utilize off-chain data or computing resources to enhance on-chain functionality; 2) Contract execution needs to be triggered, so external entities need to wake up the contract at the right time to perform on-chain functions and change contract state. Chainlink Prophets is working to solve the first problem for smart contract developers, which is often referred to as the Prophets problem. ChainLink connects smart contracts to a wealth of high-quality off-chain data sources and off-chain computing resources with minimal trust. The emergence of Chainlink Keepers can solve the second problem and trigger smart contract execution automatically and regularly.

The specific responsibility of the ChainLink Keepers is to perform a specific contract operation on the blockchain by releasing a transaction onto the chain, triggering the smart contract code logic. The difference between Chainlink Keepers and Chainlink prophets is that the Chainlink Keepers obtain data from the chain and perform calculations under the chain, and store the results on the blockchain; The chainLink Keepers tell the smart contract when it should perform a certain function. Typically, a smart contract will be woken up to look at the prophecy report before performing any action. With the ChainLink Keepers, developers can clearly define trigger conditions that automatically trigger contract execution. Conditions can be based on time (e.g., 4 p.m. Eastern Time every day), events (e.g., the end of a sports game), or calculations (e.g., insufficient mortgage rates), and so on.

Early in the development of DEFI, the development team began to decentralize the prognosticator to improve end-to-end security and reliability of smart contracts. ChainLink Keepers can do a similar thing, and the development team can decentralize the Keeper to improve the security and reliability of the smart contract triggering mechanism. Since Keepers manage critical smart contract functions, and are usually very time-sensitive and related to the user's money, the ChainLink Keepers are responsible for ensuring that the contract functions are executed on time and eliminating the risk of a single point of failure that can occur when the Keeper is manually run.

Developers can use the ChainLink Keepers interface to easily add new maintenance tasks and automate various smart contract functions.

To better understand the function of the ChainLink Keepers, let's look at the following two examples of Aave and Synthetix:

Aave

The AVE is a decentralized money market in which users pledge their assets to get an on-chain loan. AVE uses an over-collateralization mechanism, where the value of the collateral divided by the value of the loan is greater than 100%. Therefore, Chainlink Keepers must be used to clear the loans with insufficient mortgage, so as to ensure sufficient funds of the AVE loan pool and protect the capital safety of the borrower.

1.Aave注册一个Chainlink Keepers任务，当用户贷款抵押率低于清算红线时（如150%）则自动触发清算。 

2.Chainlink Keepers monitor the mortgage rate of the user loan under the chain, and call the liquidation function of AVE when the loan with insufficient mortgage rate is found.  

3. AAVE smart contract is connected to ChainLink feed price to calculate the user's mortgage rate and verify whether the mortgage rate of the loan is sufficient.  

4. When the user's mortgage rate is lower than a certain threshold, the smart contract will automatically clear the loan to ensure sufficient loan pool funds.    

Synthetix

Synthetix is a decentralised derivatives protocol that allows users to take synthetic assets that are over-collateralised on the chain and trade them with pools of liquidity contracts at zero slip. Maintenance of Synthetix requires several Keeper features, such as automatically freezing iSynths when prices reach preset ceilings or ceilings (note: iSynths access ChainLink feed to reverse track asset prices), to provide more effective leverage for end users.

1.Synthetix注册一个Chainlink Keepers任务，当价格达到上限或下限时自动冻结iSynths。 

2. ChainLink Keepers monitor the iSynths price off the chain, and call the freezerate function of Synthetix when the price reaches the preset upper or lower limit.  

3.Synthetix smart contract is connected to ChainLink feed to calculate the value of iSynths and verify whether the price reaches the upper or lower limit.  

4. Synthetix smart contracts automatically freeze iSynths when prices reach either a ceiling or a ceiling, avoiding over-leveraging the agreement and protecting the pledgers in the liquidity pool contracts.    

How does ChainLink Keepers provide a superior Keeper solution for development teams

ChainLink Keepers are based on a decentralized network in which nodes are rigorously evaluated for security and experienced, and have accumulated tens of billions of dollars of value for the DEFI contract. In addition, the ChainLink network has built a robust token economy and uses Link as an economic incentive. Nodes are selected based on task rotation, and automatic timing failover mechanism is adopted to avoid competition driving up user costs. The infrastructure of the ChainLink Keeper network provides unique advantages to users:

· 运行稳定——Chainlink Keepers沿用了Chainlink网络的优质节点，这些节点已经为各个区块链上的DeFi项目保障了数百亿的价值。Chainlink节点由专业的DevOps团队负责运行，这些团队经验丰富且口碑好，为去中心化的预言机网络输入喂价等安全可靠的链下数据。 

· Low cost -- The ChainLink Keeper network has several gas rate optimizations to reduce contract maintenance costs; A rotation mechanism is established to select nodes to further reduce the cost of smart contract DevOps.  

· Decentralized execution -- ChainLink has built a decentralized Keeper pool to improve security, save development teams a lot of time and eliminate the risk of human intervention or contract triggering through a centralized server.  

· Reputational system is open and transparent -- ChainLink has developed a robust reputation framework and on-chain monitoring tool that allows users to independently verify the historical service level of Keepers.  

· Verification of trust minimization -- In the ChainLink Keeper network, smart contracts can verify the calldata before conducting operations during the Keeper task, so ChainLink Keepers can be used in the DAPPP with minimal trust.  

· Scalable computing -- The ChainLink Keeper network enables off-chain computing for smart contracts, allowing developers to build more advanced dApps at a lower cost.    

By outsourcing smart contract maintenance to ChainLink Keepers, the development team can improve the security and reliability of the decentralized application and provide a better match for its ever-increasing lock volume.

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