Deployconsumer

Deploy your Consumer

In this section, we will guide you through the process of deploying your consumer contract to interact with the OracleRouter. Let's get started!.

Open ExampleContract.sol to edit exampleSendRequestGET() function.

Set up your own host, with your PUBLIC IP, and port as we did in the previous section testServer.js file.

ExampleContract.sol

    function exampleSendRequestGET(
        uint256 fulfillGasUsed,
        string memory name,
        string memory age
    ) external payable nonReentrant {
        uint256 gasCost = gasCostFulfill(fulfillGasUsed);
        require(
            msg.value > gasCost,
            "ETH sent is less than gas cost for the callback"
        );
 
        // Base URL
        string memory baseUrl = "http://<your host>:<port>/greet/";
 
        // Concatenate the URL with the name and age
        string memory url = string(abi.encodePacked(baseUrl, name, "/", age));
 
        OracleRequest.Request memory req;
        req.url = url;
        req.method = "GET";
        req.slot = "0";
        req.jsonResponsePath = "message"; // Adjust this according to the actual response structure
 
        bytes memory requestData = req.encodeCBOR();
 
        //this will emit a event on OracleRouter that nodes will caputure
        //msg.value is sent here
        uint256 requestId = _sendRequest(requestData, fulfillGasUsed);
    }

Compile contracts:

yarn hardhat compile

Now you can deploy your contract.

Leave your testServer.js running, open another terminal and run:

yarn hardhat deploy --tags example --network base_sepolia

Note: This deployment script also includes a script to add the consumer to the oracle, so in the next step, you won't need to add it again.

1. Create a test backend 3. Approve cosumer and upload secrets