ethers
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Building Smart Contract Event Filtering Systems for DApps
How events work in web3 Events in Web3 act as logs of significant occurrences within a smart contract. When a specific function is executed, the smart contract can “emit” an event, signalling to external systems that something has happened. These emitted events are stored on the blockchain, but they do not modify the contract’s state.…
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Encrypting Private Keys in .env
It has become very normalised to store Ethereum private keys in plain text within .env files. While this is convenient, it’s a disaster waiting to happen when working in production with wallets that contain real funds. Today, I’ll show you a better way to manage your hot wallet keys using AES encryption. Full code for…
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Solidity Virtual Pet
Let’s create a virtual pet in Solidity and deploy it to the blockchain. Full frontend and contract code for this tutorial can be found here: https://github.com/jamesbachini/Solidity-Virtual-Pet Demo here: https://jamesbachini.com/misc/SolidityPet/index.html Smart Contract Our pet is going to have two attributes for hunger and happiness. Hunger should increase over time and happiness should have a mechanism where…
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DeFi Whale Watching Tutorial & Code
Imagine if you could tap into the strategies of top investors and see where the smart money is allocating capital? Welcome to the world of DeFi whale watching, where tracking high net worth wallets can give you the edge and open up new Whale Watching Explained DeFi whale watching involves tracking the investments of “smart…
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DeFi Analysis With Rust
In this tutorial I’m going to provide some code and show you how to monitor the number of depositors to Eigenlayer over the last 24 hours. We will be using Rust with the Tokio and Ethers libraries along with the Infura API which you can get a free key from here. The first thing we…
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Ethers-rs Tutorial | The Rust Web3 Library
In this tutorial we will be setting up a Rust script to connect to a smart contract on a blockchain network to display on-chain data using the ethers-rs library. James On YouTube Watch On YouTube: https://youtu.be/FA7WFGtyri8 |Subscribe Let’s start by setting up a new Rust project (you’ll need rust installed on your device and I’ll…
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Ethers vs VIEM | Which Web3 Frontend Library?
Ether.js took over from Web3.js as the number one library for connecting up our dApps to smart contracts running on EVM blockchains. Recently Ethers v6 was released and VIEM is disrupting the space by offering a lightweight Ethereum client library from the authors of WAGMI react hooks. I have always been a big fan of…
