In this article, we continue exploring the functionality of Brownie, a smart contract development and testing framework for Solidity and Vyper. We created a simple smart contract in the previous tutorials and deployed it to the Ropsten testnet. Please check the following articles if you haven’t done so. Brownie – Smart Contracts in Python How … Read more
Creating a game of lottery where you need to generate a random number to pick a winner can be a simple task when you use the libraries of programming languages like Python or JavaScript. But in the case of Solidity, creating a secure random number is a very complex task. Due to the deterministic character … Read more
In my previous article, we looked at how to set up Brownie, create a project with a simple smart contract, interact with it on a local blockchain and run a unit test. If you haven’t read it yet, please check the following link. Brownie – Smart Contracts in Python Now, we are ready to deploy … Read more
This article will give you a quick overview of a Python library, Web3.py. By the end of this article, we will install it on our local computer and understand how to use the basic functionality, such as sending Ether, deploying a Smart Contract, and interacting with it in Python. What is Web3.py? Web3.py is a … Read more
Solidity does not offer a convenient built-in method to concatenate or compare the strings like other high-level programming languages such as java, Python, C or javascript, etc. the string type has just recently been introduced to the solidity language and it may take a while to improve further. However, the string concatenation is still possible … Read more
This article explains the concept of gas in Ethereum and the basics you need to know when developing smart contracts in Solidity. What is Gas in Ethereum? In Ethereum, we have to pay for each computational operation, measured in the unit called gas. In the Ethereum documentation, gas is defined as follows: “Gas refers to … Read more
This tutorial is based on our Finxter Academy course: Feel free to check out the course with more advanced videos, codes, and explanations on Solidity. Here’s a short video that may give you some motivation on why learning Solidity in the first place—it’s a great way to build your second income stream as a freelance … Read more
In Solidity, we can use the keyword payable to specify that an address or a function can receive Ether. This article shows you how it works and how we can use it. Ethereum Accounts and Transactions Each Ethereum account, either an external account (human) or a contract account, has a balance that shows how much … Read more
In Solidity, you can use the require, revert, and assert functions to check error conditions and handle exceptions, but they look similar at first glance, and you might get confused about how to use them. This article will explain their differences, specifically to Python developers. We use a simple smart contract below, taken from the … Read more