An escrow smart contract holds money until an agreed condition is met, then releases it to the right party — no bank, and no person sitting in the middle holding the funds. It’s one of the clearest ways to see…
Building a React dApp frontend with wagmi comes down to three moving parts: a config that says which chains to talk to and how, a provider that wraps your app, and a set of hooks that connect a wallet, read…
A diamond is a single smart contract whose external functions are supplied by several other contracts, called facets. To a wallet, a block explorer, or another contract, it looks like one ordinary contract at one Ethereum address. Behind that address,…
A Web3 Chrome extension is a normal browser extension — built with HTML, CSS, and JavaScript — that talks to a blockchain instead of (or alongside) a regular web server. It lives in the toolbar, opens in a small popup,…
ERC-404 is an experimental token standard on Ethereum that merges two older standards — ERC-20 for fungible tokens and ERC-721 for NFTs — so a single asset can behave as both a tradable coin and a unique collectible. Buy a…
A soulbound token is a token you cannot sell, trade, or send to anyone else. Once it lands in your wallet, it stays there. That one rule — no transfers — is what sets it apart from nearly every other…
ERC-6551 is an Ethereum standard that gives every existing NFT its own smart contract wallet, without changing the NFT or its contract. Each NFT gets a dedicated account that can hold tokens, own other NFTs, and sign transactions — and…
ERC-4626 is a standard interface for tokenized vaults: smart contracts that take a deposit of one ERC-20 token, issue “share” tokens that represent a claim on the pool, and let holders redeem those shares later for their portion of the…
An AI agent can reason about code, but it cannot see what happened on Ethereum five seconds ago. To give it that sight, you build an MCP server: a small program that exposes blockchain actions as tools the agent can…
A real-time Hyperliquid whale alert bot is a small program that listens to the exchange’s live trade feed, keeps only the trades large enough to matter, and sends you a notification the moment one happens. You can build a working…