PowerStream3604

%lang starknet

from starkware.cairo.common.cairo_builtins import HashBuiltin

// Define a storage variable.
@storage_var
func balance() -> (res: felt) {
}

// Increases the balance by the given amount.

PowerStream3604

// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.7.0 <0.9.0;

/**
 * @title Storage
 * @dev Store & retrieve value in a variable
 * @custom:dev-run-script ./scripts/deploy_with_ethers.ts
 */
contract Storage {

PowerStream3604

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

interface IERC20 {
    function totalSupply() external view returns (uint);

    function balanceOf(address account) external view returns (uint);

    function transfer(address recipient, uint amount) external returns (bool);

PowerStream3604

Complete tutorial of Unit Testing Ploygon Smart Contract with Truffle Framework

Overview of the tutorial

• I am writing this tutorial to help other developers to implement a thorough test for Smart Contracts on Polygon.
• We'll learn how to implement a smart-contract from scratch and unit test them using Truffle
• This tutorials goal is to help developers to get a deep understanding of how unit testing works with Smart Contract on Polygon Network as a developer.

What we'll do in the tutorial.

• Write our own Smart Contract for testing with solidity.
• Compile & Deploy them with Truffle.

PowerStream3604

Complete tutorial of writing, compiling, deploying, interacting with smart contracts on Polygon Network with Full implementation

Overview of the tutorial

• I am writing this tutorial to help other developers not to reinvent the wheel and go a much smoother way than I did.
• We'll learn how to implement a smart-contract from scratch and compile -> deploy -> interact with them using Truffle
• This tutorials goal is to help readers to get a comprehensive understanding of how to work with Smart Contract on Polygon Network as a developer.

Who is this tutorial for?

• This tutorial is for developers who wants start working on polygon network.
• It's good for readers to have prior knowlege about Truffle Framework and Ethereum network.

PowerStream3604

REMIX EXAMPLE PROJECT

Remix example project is present when Remix loads very first time or there are no files existing in the File Explorer. 
It contains 3 directories:

1. 'contracts': Holds three contracts with different complexity level, denoted with number prefix in file name.
2. 'scripts': Holds two scripts to deploy a contract. It is explained below.
3. 'tests': Contains one test file for 'Ballot' contract with unit tests in Solidity.

SCRIPTS

PowerStream3604

REMIX EXAMPLE PROJECT

Remix example project is present when Remix loads very first time or there are no files existing in the File Explorer. 
It contains 3 directories:

1. 'contracts': Holds three contracts with different complexity level, denoted with number prefix in file name.
2. 'scripts': Holds two scripts to deploy a contract. It is explained below.
3. 'tests': Contains one test file for 'Ballot' contract with unit tests in Solidity.

SCRIPTS

PowerStream3604

import sys
sys.path.append("../")
import requests
import os
from bs4 import BeautifulSoup
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.common.exceptions import TimeoutException
from seleniumwire import webdriver