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Denham Preen

Denham Preen

Co-Founder at Envio

Co-Founder at Envio. Building blockchain indexing infrastructure for the multichain era.

2 posts

Articles

Nodes Silently Miss Events

Nodes Silently Miss Events

Execution clients sometimes drop logs from eth_getLogs, and a JSON-RPC response does not show whether it is complete. This article documents some of the cases, explains which parts of an EVM block can be checked against the header's Merkle roots, and describes how HyperSync recomputes transaction and receipt roots on every ingested block.

Just-in-Time Indexing: Using Agents to Answer Onchain Questions
AI

Just-in-Time Indexing: Using Agents to Answer Onchain Questions

How to use an AI agent and Envio to answer one-off onchain questions without maintaining permanent infrastructure - build the indexer on demand, query it once, and delete it.