Blockchain

If you have ever indexed an ERC-20, backfilled a DEX, or built a liquidation monitor, you have met this error:

query returned more than 10000 results

Or one of its many cousins: Exceed maximum block range: 5000, eth_getLogs is limited to a 1024 block range, or a silent query timeout. They all mean the same thing: your eth_getLogs call asked for more than the provider is willing to return in one request. This post explains why those limits exist, lists where the common providers draw the line, and shows a chunking strategy that fetches any range reliably. At the end we look at why running your code on the node sidesteps most of the pain entirely.

Applications that react to blockchain events in real time need low-latency infrastructure, especially when dealing with event filters that return large datasets (liquidation monitors, DEX aggregators, cross-chain bridges).

In this tutorial, we’ll build a webhook service that monitors Ethereum events and sends notifications to configured URLs, using BLAZED.sh’s co-located Ethereum node access for a local path to chain data.

Understanding BLAZED.sh’s Architecture

BLAZED.sh is optimized for Ethereum applications that require consistent low latency and predictable costs. Instead of calling a remote gateway across the public internet, your service runs on the same host as a fully synced Ethereum node and connects today over the node’s local WebSocket endpoint (ws://eth:8545).

Ethereum runs on a network of thousands of computers called nodes. These nodes store blockchain data, validate transactions, and let external software (wallets, dApps, bots) talk to the network. If you’ve ever wondered what’s actually running behind MetaMask or your favorite DeFi app, it’s nodes, and this post explains how they work.

What Is Ethereum and Why Does It Matter?

Ethereum is a decentralized platform for running smart contracts, programs that execute automatically based on coded rules, and decentralized applications (dApps) built on top of them. DeFi, NFTs, and most of the interesting stuff in crypto runs on Ethereum.