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Acurast

Overview​

Acurast is a platform and protocol designed to enable Web3 projects and enterprises to realize the full potential of Web3 by interconnecting worlds like Web2, Web3, AI, IOT through Acurast's Universal Interoperability.

Using Acurast​

Through Acurast developers can arbitrarly fetch data from public or permissioned APIs for the "Oracle" use case such as price feeds for DeFi platforms through a decentralized execution layer of off-chain workers. These Processors, hosted by individuals, provide the resources of their Trusted Execution Environment that can be utilized to run computation yielding a verifiable output directly on chain. Developers can use the Acurast Console to create new request and to get access to these interoperability resources.

Acurast supports Astar's EVM environment.

Obtain Data with Acurast on EVM​

How to Get Started​

  1. Deploy the example contract to EVM
  2. Define your script detailing where to fetch data, computation etc.
  3. Create a Job on the Acurast Console
  4. Processors will fulfill verifiable outputs in your defined interval to your contract

EVM Example​

Keep in mind that you can do much more with Acurast and get access to all interoperability modules besides this example.

pragma solidity 0.8.10;

/**
 * @title Simple price feed contract
 */
contract PriceFeed {
    // Account authorized to update the prices
    address public provider = 0xF7498512502f90aA1ff299b93927417461EC7Bd5;

    // Callable by other contracts
    uint128 public price;

    /**
     * Provide the latest price
     */
    function fulfill(uint128 new_price) external {
        require(msg.sender == provider, "NOT_PROVIDER");
        price = new_price;
    }
}

Job Specification​

  1. Go to the Acurast Console and log in with your Talisman Wallet or your PolkadotJS Extension.
  2. Go to "Create Job" and select your destination, the ecosystem you're building in.
  3. Select an existing template, adapt it or write your own code that fits your needs. Test your code with "Test Code".
  4. Select your own Processor or use public ones.
  5. Define your execution schedule with the parameters such as start and endtime, interval etc.
  6. Specify your usage parameters.
  7. Specify your additional parameters such as the reward.
  8. Publish your Job and wait for your first fulfillment.

Or check out How to get started with the Acurast Console to register your Job.

Full Documentation​

You can find Acurast's official documentation here.