Simple transactions on Ethereum cost from 20-30 cents to a few dollars. But complex transactions can be much more expensive. For example, the Loom network created the ERC721x standard to avoid paying millions of dollars in gas costs when doing a batch token transfer. Clearly, knowing how to reduce gas…

Gas is a unit used in Ethereum transactions. It is one of the most difficult concept for Ethereum newbies who wonder: What is gas? What is the purpose of gas? Who pays for gas? How to calculate gas? As an aspiring Ethereum or Solidity developer, you will deal with gas…

TIP: If you have never used Remix, check out my intro to Remix on Youtube. Remix, the online IDE for Solidity has a brand new UI: Looks familiar? Did someone say "VS Code" in the audience? Pretty similar indeed. It's really intuitive, in case you feel lost here is a…

After you deploy a web application, you can always change its code if you need to add a feature or fix a bug. All you need to do is to redeploy the code on the server. With Ethereum smart contracts, this is not possible. Once you deploy a smart contract,…

Most people people know that Solidity can be used to develop Ethereum smart contracts. However, very few people also know that Solidity is also in a couple of other blockchain projects. In this article, I will tell you 3 other blockchain technologies where you can use Solidity to write smart…

Web3.js is the leading client library for Ethereum. Personally, I am fine with it, but I know that some developers don't like it because of the beta that never ends, and some random regressions happening between in recent releases. In anycase, it's always good to know some alternatives so that…