With the rise of NFTs on the Ethereum blockchain, creators can now monetize their digital art, music, videos, and other media in ways previously considered impossible. However, with the ownership and transfer of NFTs comes the question of royalties when creators receive payments for subsequent sales of their work. In this article, we will explore the concept of royalties in NFTs on Ethereum and how they are changing the landscape of digital ownership and creation.
In the previous post, we discussed meta transactions and the EIP-712 standard. This time we will check out how to sign the transaction with Ethers.js library and execute it in a smart contract. That means that the gas fee will be paid by someone else.
Meta transactions in Ethereum blockchain is an approach that removes the complexity for our users to deal with gas fees. The gas fee is a transaction fee paid to validators for proof of stake (POS) or miners for proof of work (POW) blockchains. With this approach, users sign a transaction, which is sent to a smart contract. It keeps all the security aspects upon which the Ethereum blockchain was created. This article will examine the EIP-712 standard and how to sign transactions with Metamask.
The non-fungible tokens, or in short NFTs, have one the most influential roles in the crypto and Web3 scene. These are digital assets that can represent digital art, virtual collectibles, assets in games, and more. Ethereum Foundation introduced the ERC-721 standard in 2017, which helped all the crypto wallets, brokers, and protocols to use this feature in a translatable way between any crypto solution. In this post, we will look more deeply into the ERC-721 standard and explore how it is used in the Solidity programming language for the Ethereum blockchain.
Bytes and Strings have a special place in the Solidity programming language. Both of these types work quite similarly yet differently. Even bytes have two kinds of ways - fixed or dynamic size. Bytes and strings can be converted and vice versa according to our needs to work with them. Let's look more profound in this blog post.
This time let's talk about fungible tokens, one of the main building blocks in DeFi. These tokens can represent coins, gold, grain, and other assets that can be exchanged for them. We will look into one of the first Ethereum Improvement Proposal with number 20. This token standard is widely known as ERC20 and describes an interface for tokens within smart contracts. Functions like token transferring, approving spending, creating, and others are defined by this ERC20 standard.
One of the weirdest Solidity programming language's quirks is the absence of null. Coming from Swift, where nullability is one of the core building blocks, it felt foreign. At first, I didn't understand how to code without such a useful feature. This post elaborates on how to find a way around that in Solidity when building smart contracts.
This time we will talk about the critical lower-level function delegatecall. It is widely used in a proxy pattern, for instance, when using OpenZepplin upgrades pattern. Essentially this function executes code in another contract but uses data from the caller concept. Let's dig deeper and explore more.
This time, we will talk about storage locations in Solidity programming language, specifically about the storage and memory locations. Not knowing what they represent and how they work can cause issues in our smart contracts.
Events in Solidity programming language help inform when something has happened in the smart contract. Parties like a web frontend, data gathering tools, and more can listen to specific events and react accordingly. In this post, we will dig deeper into Events and how to use them when developing smart contracts on Ethereum-like blockchains.
Mappings in Solidity programming language play a significant role. These are hash tables that can have a key and value. When we use them, there are some caveats, especially from other programming languages. Let's explore them in this article.
Arrays in Solidity programming language can hold primitive data types like integers, boolean, and string. An array can be initialized with a fixed or dynamic size. If we compare them to other more advanced programming languages, there are pretty limited functions available to work with arrays. Despite that, we can add, remove, get the size of the array, and more.
Solidity language allows specifying accessibility for contract functions and state variables. That will enable us to set constraints on constructing the smart contract and whether other contracts or addresses can access the data. Contract state variables and functions have a slight difference that we're going to check out. I want to mention that accessibility and visibility are different things in blockchain development context.
Solidity is an object-oriented language to write smart contracts that can be deployed on the blockchain, for instance, Ethereum. The syntax is similar to Javascript, but on the other hand, semantics is closer to C++. We will dig into Solidity language structure and functions from a Swift developer's perspective.