Learn more about NFTs and how to create them using the Tezos blockchain and the IPFS

Everybody is talking about NFTs! But a lot of people don’t understand what they are or how they work. Where are they stored? What do they represent? Why do some of them become so expensive? Am I going to become rich if I sell NFTs too? 😄

Although Ethereum was the first blockchain to start the NFT revolution, more and more NFT “minters” are moving to Tezos, attracted by the low gas fees, the robust smart contract platform, and the recent success of Hic…

Learn how to build a dapp on Tezos that connects to wallets and updates a smart contract

It’s been more than a year since I wrote How to build your first dapp on Tezos. At that time, creating dapps that work with the Tezos blockchain was still in its infancy, it was difficult, the tooling was nonexistent or undocumented and the features limited. There was only a handful of developers who had experience with building apps on Tezos. …

Use the latest feature of the Tezos blockchain in your smart contracts

Prerequisite: this article requires a basic knowledge of CameLigo, one of the syntaxes used by the Ligo language.

Tickets have been a very anticipated feature of the Edo upgrade: they promise to bring permission-based access in smart contracts to the next level. …

Learn more about the message passing architecture of Tezos smart contracts with a practical use case

Tokens are the hot subject of the moment in the Tezos ecosystem: everyone is talking about non-fungible tokens (or NFTs) with the release of different platforms to create them (like OpenMinter) and to sell/exchange them (like Kalamint). However, the subject of fungible tokens is often pushed into the background while being as exciting as their non-fungible cousins. Indeed, they are the keys to unlocking the full capacity of DeFi on Tezos.

I got excited since I first heard about the Kolibri stablecoin. I feel…

One of the most attractive features of smart contracts is the possibility to store a substantial amount of data into them that can then be used in the contract code. Although Michelson provides different structures to store data, the object of this article is going to be its maps. Maps are hash tables that contain key/value pairs, which means that when you want to find a value in a map, you search for its key. This allows you to store complex data that can be referenced with a single word or number or even more complex data like a pair!

…

One of the friction points you will encounter when you start developing more complex dapps for your smart contracts happens when creating multiple new transactions in a row. Each Tezos account holds a counter that increments every time an operation is included in a block on the network. This means that you cannot forge a new transaction if you already have a pending transaction or you will get the now infamous error message Counter 12345 already used for contract tz1...

There are different scenarios when you want to send multiple transactions at the same time: for example, you could hold…

How to be sure your Ligo code compiles to the Michelson code you want

Ligo is a fantastic tool that makes working with Tezos smart contracts a lot easier. However, its ease of use means that the compiler takes care of the heavy lifting for you and may compile your code down to a format you may not want. This becomes particularly important with TZIP standards: these standards establish fixed Michelson structures that could make your code useless if you don’t respect them. Here is a very simple example:

Imagine you have a record in Ligo like this one:

let…

I decided to work on a little project during the weekend and try the updated version of the contracts offered by TQ Tezos. These contracts implement the basic features of an FA2 contract according to the TZIP-12 standard. So I made some coffee, opened VSCode and started diving into the code written in CameLigo (the whole thing being made a lot easier now with the new VSCode extension from Ligo that allows syntax highlighting within the editor). While I was reading it, I thought it could be interesting to document the thought process and the different steps involved in extending…