Denham Preen
Co-Founder at Envio
Co-Founder at Envio. Building blockchain indexing infrastructure for the multichain era.
4 postsArticles
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
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.
Privacy in Public: A Case Study on Privacy Pools
What an Envio HyperIndex multichain indexer plus a thin Uniswap V4 price feed reveal about Privacy Pools (21 pools, 4 chains, ~5,200 deposits, $5.78M TVL): a working privacy primitive whose on-chain footprint shows the cryptographic floor holding.
Indexing and Reorgs
How blockchain indexers handle chain reorgs, backfills and data completeness, and how Envio HyperIndex detects reorgs and rolls back indexed data automatically, on by default, with no rollback logic in your handlers.