WalletConnect
An open-source protocol that lets crypto wallets connect securely to decentralized apps without sharing private keys.
WalletConnect is an open-source communication protocol used to link a crypto wallet with decentralized applications, often called dapps. Instead of creating a new account or entering a private key into a website, a user approves a connection from their wallet app, typically by scanning a QR code or tapping a mobile deep link. The dapp can then request actions such as signing a message or approving a transaction, while the wallet keeps the user’s private keys on their own device.
It matters because many web3 services need a safe, standard way to interact with different wallets across desktop browsers, mobile apps, and blockchains. For example, a user visiting a decentralized exchange on a laptop might scan a WalletConnect QR code with their phone wallet, review the transaction details on the phone, and approve or reject it there. This is similar to using a secure login bridge: the website can ask for permission, but the wallet remains the place where sensitive approvals happen.
Other terms in Web3 & Development
Ethers.js
A JavaScript library that helps developers build apps that interact with Ethereum and other EVM-compatible blockchains.
Foundry
A fast Ethereum smart contract development toolkit used to build, test, debug, and deploy Solidity projects.
Full Node
A full node is software that stores and verifies a blockchain’s history and rules without relying on a third party.
Hardhat
A development framework for building, testing, debugging, and deploying Ethereum smart contracts and decentralized applications.