Chainlink Keepers enable conditional execution of your smart contracts functions through a hyper-reliable and decentralized automation platform that uses the same external network of node operators that secures billions in value. Building on Chainlink Keepers will help you get to market faster so you don't have to deal with the setup cost, ongoing maintenance, and risks associated with a centralized automation stack. To take full advantage of the Keepers automation infrastructure, read all of the documentation to understand the features of Chainlink Keepers.

To learn more about how the Chainlink Keepers Network automates your smart contracts, read the Chainlink Keepers Architecture page.

Topics

• Select a trigger
  • Time-based trigger
  • Custom logic trigger
• Supported networks and costs
• Questions and examples

Select a trigger

Chainlink Keepers will reliably execute smart contract functions using a variety of triggers.

• Time-based trigger: Use a time based trigger if you want Keepers to execute your function according to a time schedule. We simply call it the Job Scheduler and it is a throwback to the Ethereum Alarm Clock. Your contract does not need to be Keepers-compatible.
• Custom logic trigger: Use custom logic trigger if you want to provide custom solidity logic that Keepers will evaluate (off-chain) to determine when to execute your function on-chain. Your contract should be Keepers-compatible. Custom logic examples include checking the balance on a contract, only executing limit orders when their levels are met, any one of our coded examples, and many many more.

Time-based trigger

Before you begin, deploy the contract that you want to automate. You will also need the ABI for your contract if it has not been verified. Your contract does not have to be Keepers-compatible.

1. Open the Chainlink Keepers app.

   Open the Chainlink Keepers App

2. Register a new Upkeep in the Chainlink Keepers App and select Time-based trigger. Provide the address of your deployed contract, provide the ABI if it is not verified, and choose the function that you want to automate along with the relevant function inputs, if any.

3. Specify the time schedule using CRON.

4. Complete the remaining details. Your upkeep name will be publicly visible, but your email and project name will not be publicly visible. Your gas limit needs to include an extra 150K for execution.

5. Fund your Upkeep with ERC-677 LINK. See the LINK token contracts page to determine where to acquire ERC-677 LINK.

6. After your Upkeep is registered, manage it in the Keepers App.

For more details on time-based automation, click here.

Custom logic trigger

To use a custom logic trigger, you will need to make your contract Keepers-compatible.

1. Open the Chainlink Keepers app.

   Open the Chainlink Keepers App

2. Register a new Upkeep in the Chainlink Keepers App and select Custom logic trigger. Provide the address of your Keepers-compatible contract and complete the remaining details. Your upkeep name will be publicly visible, but your email and project name will not be publicly visible. Ensure you specify the appropriate gas limit for your function to execute on chain.

3. Fund your Upkeep with ERC-677 LINK. See the LINK token contracts page to determine where to acquire ERC-677 LINK.

4. After your Upkeep is registered, manage it in the Keepers App.

5. For more details on custom logic automation, click here.

Supported networks and costs

For a list of blockchains that is supported by Chainlink Keepers, see the Supported Networks page. To learn more about the cost of using Chainlink Keepers, see the Keepers Economics page.

Questions and examples

If you have questions, read the Keepers Frequently Asked Questions page, ask them in the #keepers channel in our Discord server, or reach out to us.

To understand different use cases for Chainlink Keepers, refer to Other Tutorials.