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Using Truffle

Setting up and launching anDRC20 Token Smart Contract on the Deelance Testnet using Truffle.

Using Truffle

What is Truffle ?

Truffle is a development framework and suite of tools primarily used for building, deploying, and managing smart contracts and decentralized applications (DApps) on blockchain platforms. It provides developers with a set of utilities and commands to streamline the development process and make it easier to work with blockchain technologies.

Configuring the Development Workspace

Before we dive in, ensure you have the following essentials installed: Requirements:

Installing Truffle

After we've set up those tools, we just need a single command to get Truffle:
npm install -g truffle
Let's ensure Truffle is correctly installed. Open your terminal and type truffle version. If some error shows up, make sure your computer knows where to find the npm modules.

Create a Project

Our first task is to set up a Truffle project. We'll use TokenDeelance.sol as our guide, demonstrating how to create a token that can be shared between accounts:
  • Create a new directory for your Truffle project
mkdir PepeDeelance
cd PepeDeelance
  • Initialize your project:
truffle init
After completing this step, you'll have a project organized with these folders:
  • contracts/: Directory for Solidity contracts
  • migrations/: Directory for scriptable deployment files
  • test/: Directory for test files for testing your application and contracts
  • truffle-config.js: Truffle configuration file

Create Contract

  • Create a PepeDeelance.sol file within the contracts/: directory.
  • Copy the below code and place it into the PepeDeelance.sol file:
PepeDeelance.sol
// SPDX-License-Identifier: MIT
pragma solidity >=0.4.22 <0.9.0;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
contract PepeDeelance is ERC20, Ownable {
constructor() ERC20("PepeDeelance", "PEPEDLANCE") {
_mint(msg.sender, 1000000000 * 10 ** decimals());
}
function mint(address to, uint256 amount) public onlyOwner {
_mint(to, amount);
}
}
Ensure you have the @openzeppelin/contracts package since our Solidity code relies on it. To get it, execute: npm i @openzeppelin/contracts in terminal.
  • Create a 1_deploy_contracts.js file within the migrations/: directory and insert the following code:
1_deploy_contracts.js
const PepeDeelance = artifacts.require("PepeDeelance");
module.exports = function (deployer) {
deployer.deploy(PepeDeelance);
};
  • Next, paste the following code into your truffle-config.js file:
truffle-config.js
const HDWalletProvider = require("@truffle/hdwallet-provider");
module.exports = {
networks: {
development: {
host: "127.0.0.1",
port: 9545,
network_id: "*",
},
testnet: {
provider: () =>
new HDWalletProvider(
"<YOUR_WALLET_PRIVATE_KEY>",
`https://testnet-rpc.deelance.com`
),
network_id: 455214,
confirmations: 10,
timeoutBlocks: 200,
skipDryRun: true,
},
},
// Set default mocha options here, use special reporters etc.
mocha: {
// timeout: 100000
},
// Configure your compilers
compilers: {
solc: {
version: "0.8.0", // A version or constraint - Ex. "^0.5.0"
},
},
};
Ensure you replace <YOUR_WALLET_PRIVATE_KEY> with the actual private key of your wallet.
Ensure you've set up @truffle/hdwallet-provider, as mentioned in the file. To get this package, type npm i @truffle/hdwallet-provider in your terminal.
  • Compile Contract

To compile your Truffle project, execute the following command:
truffle compile

Deploying DRC20 Contract on Deelance Network

Execute the given command at the base of the project folder:
truffle migrate --network testnet
The contract will deploy on the Deelance Testnet and will appear in your terminal as follows:
1_deploy_contracts.js
=====================
Deploying 'PepeDeelance'
------------------------
> transaction hash: 0x42a4fe45d66cdc7648d9a8607f4f8c0044946074c1bf07963cf501bf14a8f493
> Blocks: 2 Seconds: 8
> contract address: 0xE6D82514Fe6A796D947b5580Fc26090Dd818412e
> block number: 37296
> block timestamp: 1692550864
> account: 0x2bd250B5e8eEeB4e0E9fC6023f525Ac62b72c0ae
> balance: 9.984142327455598517
> gas used: 1491671 (0x16c2d7)
> gas price: 2.500000007 gwei
> value sent: 0 ETH
> total cost: 0.003729177510441697 ETH
Pausing for 10 confirmations...
--------------------------------
> confirmation number: 1 (block: 37297)
> confirmation number: 2 (block: 37298)
> confirmation number: 3 (block: 37299)
> confirmation number: 4 (block: 37300)
> confirmation number: 5 (block: 37301)
> confirmation number: 6 (block: 37302)
> confirmation number: 7 (block: 37303)
> confirmation number: 8 (block: 37304)
> confirmation number: 9 (block: 37305)
> confirmation number: 10 (block: 37306)
> Saving artifacts
-------------------------------------
> Total cost: 0.003729177510441697 ETH
Summary
=======
> Total deployments: 1
> Final cost: 0.003729177510441697 ETH
Keep in mind that your address, transaction_hash, and other details will vary. The information above is simply to give you a sense of the format.
Well done! You've successfully launched the DRC20 Smart Contract on Deelance Network. You can now engage with the Smart Contract.