Thinking Through Oracles with Data Last night I hacked together oraclewars.xyz, a live feed of on-chain oracle data from multiple providers. It’s fascinating to watch them in action, and my hope is that it helps developers understand how oracles really work in practice—informing better design decisions and making DeFi safer. If you’re a developer, you’ve probably heard about oracles. In a nutshell, they let your smart contracts reference off-chain information—like asset prices or real-world events—and trigger actions based on that data. As we’ve grown beyond Truffle and Ganache, oracles have also evolved. There are push oracles, pull oracles, and more. One day I’d love to dive deep into all their flavours, but let’s start by looking at push oracles from a data perspective. A push oracle does exactly what it sounds like: it periodically pushes data to the chain. Your smart contract can read the latest data and do anything from executing trades to minting meme coins—or whatever else your imagination cooks up. Typically, the frequency of these pushes is governed by a heartbeat (say, every 24 hours) and a deviation threshold (e.g., 0.5%), so if the price moves more than that, the oracle updates to stay accurate. Of course, theory and practice don’t always align, so it’s enlightening to see the actual data posted on-chain. It lets you form a better mental model of what to expect—especially under volatile or even black swan conditions. That’s where Oracle Wars comes in. It’s all about educating devs on how oracles behave in the wild. Right now, it shows the ETH/USD feed on Ethereum mainnet for both RedStone and Chainlink. (Props to @envio_indexer for making the data indexing super easy and incredibly fast.) I plan to add more feeds for comparison—maybe even on the emerging Monad network—but for now, this single feed comparison is plenty illuminating. You’ll notice the updates can look haphazard at times. That’s because when volatility spikes, the deviation threshold is triggered and you get multiple quick-fire updates. When things are calm, you see fewer posts. About a week ago, there was a surge of volatility, and both @redstone_defi and @chainlink did a solid job of posting frequent updates, keeping the price feed fresh and accurate. This is vital for protocols like @aave that rely on real-time prices to manage liquidations and ensure user funds stay safe. So check out oraclewars.xyz and let me know what you discover. Also, feel free to suggest features you’d like to see added—I’m all ears. If you want to learn more about how to easily pull on-chain data across multiple chains (I built the whole site in just two hours last night!), reach out and I’ll share the details of the stack I used with Envio.dev. Next time, I might talk more about front running, pull-based oracles, and everything else under the sun. But for now, it’s Friday, and I’ve got tennis calling my name. Catch you next time!