---
title: "Onchain Analytics"
section: experiments
description: "A homebrew analytics experiment: keccak256 session hashes and page-view counts recorded onchain on Base Sepolia."
tags: ["onchain", "analytics", "ethereum", "base", "privacy"]
published: 2024-04-05T15:01:44Z
updated: 2026-10-14T00:44:29Z
cid: bafkreigo7xlczcq6lwzdznp4rsxq3epbw2nveqdrskfetmveqtj55ybd6i
html: https://iammatthias.com/experiments/1791937789859-onchain-analytics
---

# Onchain Analytics

Recording started at block [12315477](https://sepolia.basescan.org/tx/0xc6fffb63218605b36b5cb7b07df1e66be77015e4ede9fe03b0356dd18d1fb8f8) and has since stopped. The smart contracts are [verified on Basescan](https://sepolia.basescan.org/address/0x29867a886F96e84196fa47DEe2Fb4a5853412C03#code).

This site briefly ran a homebrew analytics system — keccak256 session hashes and onchain page-view counts. [Notes on the system](/posts/1712329304675-onchain-hit-counter).

[Read the onchain analytics contract on Basescan](https://sepolia.basescan.org/address/0x29867a886F96e84196fa47DEe2Fb4a5853412C03#code)

---

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