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 Hardhat

• Hardhat

Setup 2: Set Up the Project

Clone the example repo:

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

Install OpenZeppelin Contracts:

npm install

Setup 3: Write the Token Contract

Create a New Solidity File:

• Create a new file for your token contract:

touch contracts/Token.sol

Write the Token Contract:

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

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

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

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

Compile the Smart Contract:

npx hardhat compile

Test the Smart Contract

npx hardhat test

Step 4: Deploy the Token Contract

Set the private key:

npx hardhat vars set PRIVATE_KEY

Deploy the Contract:

npx hardhat ignition deploy ./ignition/modules/Token.js --network pharos

Step 5: Verify the Token Contract

Add the following content to your hardhat.config.js file

• For Atlantic Testnet

Field	Value
chain_name	pharos
chain_id	688689
rpc_endpoint	https://atlantic.dplabs-internal.com"
api_host	https://api.socialscan.io/pharos-atlantic-testnet/v1/explorer/command_api/contract
explorer_url	https://atlantic.pharosscan.xyz/

require("@nomicfoundation/hardhat-toolbox");

/** @type import('hardhat/config').HardhatUserConfig */
module.exports = {
  solidity: "0.8.28",
  networks: {
    pharos: {
      url: "https://atlantic.dplabs-internal.com",
      accounts: [vars.get("PRIVATE_KEY")],
    },
  },
  etherscan: {
    customChains: [
      {
        network: "pharos",
        chainId: 688689,
        urls: {
          apiURL: "https://api.socialscan.io/pharos-atlantic-testnet/v1/explorer/command_api/contract",
          browserURL: "https://atlantic.pharosscan.xyz/",
        },
      },
    ],
    apiKey: {
      pharos: "Put a random string", // Note we don't need a apiKey here, just leave a random string
    },
  }
};

• For Testnet

Field	Value
chain_name	pharos
chain_id	688688
rpc_endpoint	https://testnet.dplabs-internal.com
api_host	https://api.socialscan.io/pharos-testnet/v1/explorer/command_api/contract
explorer_url	https://testnet.pharosscan.xyz/

require("@nomicfoundation/hardhat-toolbox");

/** @type import('hardhat/config').HardhatUserConfig */
module.exports = {
  solidity: "0.8.28",
  networks: {
    pharos: {
      url: "https://testnet.dplabs-internal.com",
      accounts: [vars.get("PRIVATE_KEY")],
    },
  },
  etherscan: {
    customChains: [
      {
        network: "pharos",
        chainId: 688688, // Or use Pharos Atlantic Testnet chain id 688689
        urls: {
          apiURL: "https://api.socialscan.io/pharos-testnet/v1/explorer/command_api/contract",
          browserURL: "https://testnet.pharosscan.xyz/",
        },
      },
    ],
    apiKey: {
      pharos: "Put a random string", // Note we don't need a apiKey here, just leave a random string
    },
  }
};

Run the hardhat verify command

npx hardhat verify --network pharos <contract_address> <constructor_args_params>

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.

Conclusion

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

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