Write Your First Token

This guide will walk you through the process of creating and deploying your first token on the Pharos blockchain. By the end of this guide, you will have a fully functional token contract and understand how to interact with it.

Prerequisites

Before you begin, ensure you have the following:

• Git: Used for code management and obtain examples.

• Node.js: Install it from nodejs.org.

• Pharos Devnet/Testnet Access: Access to a Pharos node (local or remote) for interacting with the blockchain.

Setup 1: Install Foundry

• Foundry

Setup 2: Set Up the Project

Clone the example repo:

git clone https://github.com/PharosNetwork/examples
cd examples/token/foundry/contract

Install OpenZeppelin Contracts:

• Foundry uses forge to manage dependencies. Install OpenZeppelin contracts:

forge install OpenZeppelin/openzeppelin-contracts --no-git --no-commit

Setup 3: Write the Token Contract

Create a New Solidity File:

• Create a new file for your token contract:

touch src/Token.sol

Write the Token Contract:

• Open src/Token.sol in your favorite text editor and add the following code:

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "openzeppelin-contracts/contracts/token/ERC20/ERC20.sol";

contract Token is ERC20 {
    constructor(uint256 initialSupply) ERC20("Token", "MTK") {
        _mint(msg.sender, initialSupply);
    }
}

Compile the Smart Contract:

• Use forge to compile the contract:

forge build

Test the Smart Contract

• Use forge to test the contract:

forge test

Step 4: Deploy the Token Contract

Create a Deployment Script:

• Create a new file for the deployment script:

touch script/DeployToken.s.sol

Write the Deployment Script:

• Open script/DeployToken.s.sol and add the following code:

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "forge-std/Script.sol";
import "../src/Token.sol";

contract DeployToken is Script {
    function run() external {
        uint256 deployerPrivateKey = vm.envUint("PRIVATE_KEY");
        vm.startBroadcast(deployerPrivateKey);

        Token token = new Token(1000000); // Initial supply of 1,000,000 tokens

        vm.stopBroadcast();
    }
}

Set the private key:

export PRIVATE_KEY=<your private key>

Deploy the Contract:

• Use forge to deploy the contract to the Pharos Testnet:

forge script script/DeployToken.s.sol --rpc-url <PHAROS_RPC_URL> --broadcast

Step 5: Verify the Token Contract

forge verify-contract \
<contract_address> \
--constructor-args <abi_encoded_args> \
src/Token.sol:Token \
--chain-id 688688 \
--verifier blockscout \
--verifier-url https://api.socialscan.io/pharos-testnet/v1/explorer/command_api/contract

Note: Replace with your token contract address

Step 6: Interact with the Token Contract

Open script/InteractToken.s.sol and add the following code:

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

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

contract InteractToken is Script {
    function run() external {
        uint256 deployerPrivateKey = vm.envUint("PRIVATE_KEY");
        vm.startBroadcast(deployerPrivateKey);

        Token token = Token(address(0x00)); // Replace with your token contract address

        // Check balance
        uint256 balance = token.balanceOf(msg.sender);
        console.log("Balance:", balance);

        // Transfer tokens
        token.transfer(address(0x00), 100); // Replace with recipient address and amount
        console.log("Tokens transferred");

        vm.stopBroadcast();
    }
}

Execute the script using forge:

forge script script/InteractToken.s.sol --rpc-url <PHAROS_RPC_URL> --broadcast

Troubleshooting

• Contract Deployment Fails: Ensure you have enough testnet tokens to cover the deployment cost.

• Interaction Issues: Verify that the contract address and ABI are correct.

• Insufficient Balance: Ensure your wallet has enough tokens to transfer.

Next Steps

Now that you’ve created and deployed your first token using Foundry.

This guide provides a comprehensive introduction to creating and deploying a token on the Pharos blockchain using Foundry. If you encounter any issues, refer to the Troubleshooting section or consult the Foundry documentation. Happy building! 🚀