Deploying your contract

In this chapter, you’ll deploy your Walnut contract to a local Seismic node for testing. By the end of this guide, you’ll have a fully deployed contract that you can interact with using your CLI or scripts. Estimated Time: ~15 minutes.

Writing the deploy script

Navigate to the script folder in your Walnut App and open the Walnut.s.sol file located at:

packages/contracts/script

and add the following to it:

// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.13;

import {Script, console} from "forge-std/Script.sol";
import {Walnut} from "../src/Walnut.sol";

contract WalnutScript is Script {
    Walnut public walnut;

    function run() public {
        uint256 deployerPrivateKey = vm.envUint("PRIVKEY");

        vm.startBroadcast(deployerPrivateKey);
        walnut = new Walnut(3, suint256(0));
        vm.stopBroadcast();
    }
}

This script will deploy a new instance of the Walnut contract with an initial shell strength of 3 and an initial kernel value of 0.

Deploying the contract

1. In a separate terminal window, run

sanvil

in order to spin up a local Seismic node.

1. In packages/contracts , create a .env file and add the following to it:

RPC_URL=http://127.0.0.1:8545
PRIVKEY=0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80

The RPC_URL denotes the port on which sanvil is running and the PRIVKEY is one of the nine standard sanvil testing private keys.

1. Now, from packages/contracts, run

source .env
sforge script script/Walnut.s.sol:WalnutScript \
    --rpc-url $RPC_URL \
    --broadcast

Your contract should be up and deployed to your local Seismic node!