[Smart Contract] Run "Hello, World!" Job

How to run a cowsay job from a Smart contract!

Remix

Open the Contract

Click this link to open the ExampleClient.sol contract in remix

Alternatively, open the Remix IDE in your browser and copy in the below ExampleClient.sol contract:

https://github.com/bacalhau-project/lilypad-modicum/blob/main/src/js/contracts/ExampleClient.sol

// SPDX-License-Identifier: GPLv3
pragma solidity ^0.8.6;

interface ModicumContract {
  function runModuleWithDefaultMediators(string calldata name, string calldata params) external payable returns (uint256);
}

// Payment is 2 lilETH for all jobs currently
// got to testnet.lilypadnetwork.org to fund your wallet
contract ExampleClient {
  address public _contractAddress;
  ModicumContract remoteContractInstance;

  uint256 public lilypadFee = 2;

  struct Result {
      uint256 jobID;
      string cid;
      string httpString;
  }

  Result[] public results;

  event ReceivedJobResults(uint256 jobID, string cid);

  // The Modicum contract address is found here: https://github.com/bacalhau-project/lilypad-modicum/blob/main/latest.txt
  // Current: 0x422F325AA109A3038BDCb7B03Dd0331A4aC2cD1a
  constructor (address contractAddress) {
    require(contractAddress != address(0), "NaiveExamplesClient: contract cannot be zero address");
    _contractAddress = contractAddress;
    remoteContractInstance = ModicumContract(contractAddress);
  }

  function setLilypadFee(uint256 _fee) public {
      lilypadFee = _fee;
  }
  
  function runCowsay(string memory sayWhat) public payable returns (uint256) {
    require(msg.value == lilypadFee * 1 ether, string(abi.encodePacked("Payment of 2 Ether is required")));
    return runModule("cowsay:v0.0.1", sayWhat);
  }

  function runStablediffusion(string memory prompt) public payable returns (uint256) {
    require(msg.value == lilypadFee * 1 ether, string(abi.encodePacked("Payment of 2 Ether is required")));
    return runModule("stable_diffusion:v0.0.1", prompt);
  }

  function runSDXL(string memory prompt) public payable returns (uint256) {
    require(msg.value == lilypadFee * 1 ether, string(abi.encodePacked("Payment of 2 Ether is required")));
    return runModule("sdxl:v0.9-lilypad1", prompt);
  }

 function runModule(string memory name, string memory params) public payable returns (uint256) {
    require(msg.value == lilypadFee * 1 ether, string(abi.encodePacked("Payment of 2 Ether is required")));
    return remoteContractInstance.runModuleWithDefaultMediators{value: msg.value}(name, params);
  }

  // Implemented Modicum interface. This saves results to a results array
  function receiveJobResults(uint256 _jobID, string calldata _cid) public {
    Result memory jobResult = Result({
        jobID: _jobID,
        cid: _cid,
        httpString: string(abi.encodePacked("https://ipfs.io/ipfs/", _cid))
    });
    results.push(jobResult);

    emit ReceivedJobResults(_jobID, _cid);
  }

  function fetchAllResults() public view returns (Result[] memory) {
    return results;
  }
}

Connect to the Testnet

Connect MetaMask to the Lalechuza testnet & ensure you have testnet lilETH funds.
In the deploy tab in remix [fourth tab in the side bar], ensure you set the environment to "Injected Provider - MetaMask"

Deploy the Contact In remix, compile the ExampleClient.sol contract [third tab in the side bar]

Deploy a new contract by pasting in the Modicum contract address (found here) to the constructor

Deploy an existing ExampleClient.sol contract by using the "At Address" with the following pre-deployed contract address: 0x035C7593D3355b9bE0459dF2296053f887d051f1

Call the runCowsay function

The moment of truth! Let's run the cowsay example!!

⚠️❗First, ensure you set remix to pay 2 lilETH to the function by setting the "value" field

Then add the string parameter for what you want the cow to say and click the transact button! Your MetaMask wallet should pop up asking you to confirm the transaction.

Wait a couple of minutes for the job to complete on the compute network. Then you will be able to click the fetchAllResults button to get your IPFS CID result.

See the Results 🐄

Open the string starting with "https://ipfs.io/" in your browser which contains the output of the compute job:

The cowsay result is found under "stdout"

Congrats!