This tutorial shows you how to implement your own prototype of an NFT marketplace with Solidity and JavaScript. You can check out the code on our GitHub: GitHub: https://github.com/finxter/NFTMarketplace For additional help, you can find a full course with explainer videos on the Finxter Computer Science Academy: Video Course: Creating an NFT Marketplace with Solidity … Read more
This article will look at deploying a smart contract to Polygon using Brownie. What is Polygon? Polygon is “a protocol and a framework for building and connecting Ethereum-compatible blockchain networks” (https://polygon.technology/). It started as Matic Network in 2017 to solve Ethereum’s scalability and user experience issues by using an off/side chain scaling solution. In 2021, … Read more
An array is a data structure where multiple values of similar data types can be stored. In contrast, a struct works as a container of a group of elements of different data types. A struct can then also be considered as a new data type. Hence we can create an array of structs comprising those … Read more
What is an ERC-721 Token? An ERC-721 token is a smart contract on Ethereum that implements the methods and events specified in the EIP-721: Non-Fungible Token Standard. It is designed to be used as a non-fungible token (NFT), meaning the token’s instances (or units) are distinct from one another. The ERC-721 standard is based on … Read more
In the previous posts, we developed simple smart contracts, deployed them using Remix or Truffle, and interacted with them using JSON-RPC interface providers such as using web3.py or web3.js. In this post, we shall take a closer examination into how a smart contract works on the Ethereum blockchain at the grass root. More precisely, we … Read more
Deleting an element from an array in solidity can be an easy job, but some tricky parts lie under the hood. We use the “delete” function to remove the element from an array in solidity. But the length of the array and its sequence may not remain in the way we are expecting. Let’s go … Read more
What is an ERC-20 token? An ERC-20 token is a smart contract on Ethereum that implements the methods and events specified in the ERC-20 standard. It is designed to be used as a fungible token, meaning each instance (or unit) of a token has the same value as another instance of the same token. It … Read more
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
We know what a blockchain is and its wide applications. Blockchain is a distributed computing technology involving multiple nodes distributed across geographies. The problem is to ensure that each node gets the exact copy of the data. Hence, some protocol is needed to achieve this unison or consensus. This post tries to cover the need … 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
Can you believe 5 years ago 1 ETH was priced at $9.33 USD? ETH is now on the rise, priced at $4270.66 USD with growth showing 45,673.42%. But wait, are you still not sure what Ethereum is? Perhaps you’ve heard of it but only have a vague idea. Not to worry. I’ve compiled a list … Read more