Parla | contracts

Hi! This repository includes smart contracts in solidity for Ethereum, Avalanche and other blockchains.

IT IS CREATED FOR LEARNING PURPOSE

ERC20

ERC20 is standart for Fungible Tokens, in other words, the token contract has properties and capabilities which makes all tokens same.

ERC20.sol contract implementation serves minting, burning features.

In order to create own token contract, the contract should be extended from ERC20.sol and Pausable.sol (if you need!).

First parameter indicates the name of the token Second parameter indicates the symbol of the token The default decimal is 18

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

import "./ERC20/ERC20.sol";
import "./lib/Pausable.sol";

/**
 * @title Parla ERC20 Token
 *
 * @dev Implementation of the pausable standard token.
 *
 */
contract ParlaERC20 is ERC20, Pausable {

    constructor() ERC20("Parla", "PAR") { }

    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual override {
        super._beforeTokenTransfer(from, to, amount);

        require(!isPaused(), "ParlaERC20: token transfer while paused");
    }

}

Deployment

Avalanche

The Contract Chain is the default smart contract blockchain on Avalanche and enables the creation of any Ethereum-compatible smart contracts.

Truffle

Truffle is development framework to makes compile, test and deploy to desired network for blockchains using the Ethereum Virtual Machine (EVM).

In this project, we used Avalanche Fuji Testnet to deploy smart contract.

truffle-config.js includes network object to configure blockchain networks.

Getting Started

Create a file named as .env.json in root of the project. Set your wallet mnemonic words and snowtrace api key.

{
   "mnemonic": "sample sample sample sample sample sample sample sample sample sample sample sample",
   "snowtrace": "1A4ED7Z39Q921RKZUFRWSETCE8WCH5IX9B"
}

Wallet mnemonic is required for deploying contract to desired network. Snowtrace API key is needed for verifying your contract which makes your contract readable for everyone.

Install

Install truffle

npm install truffle -g

Install project dependencies

npm install

Compile

truffle compile

Migrate/Deploy

truffle migrate --network fuji

There are files under migrations folder to make deployment.

1_initial_migration.js

const ParlaERC20 = artifacts.require("ParlaERC20");

module.exports = async function (deployer) {

  await deployer.deploy(ParlaERC20);
  const parla = await ParlaERC20.deployed();

  console.log("ParlaERC20 deployed to: " + parla.address);

};

Truffle scans .sol files under contracts folder.

Verify

truffle run verify ParlaERC20 --network fuji