# chengmarc.eth

> DeFi mechanisms, protocol risk, market structure | On-chain since 2017 | Mathematics @UofT '23 🇨🇦

## Recent Posts

- [Extend, Never Correct: From SSTORE to RISC-V, the Backward Compatibility Constraint Governing EVM Evolution](https://paragraph.com/@chengmarc/extend-never-correct): chengmarc.eth, May 16th 2026
- [When x·y = k Breaks: A Mechanism Derivation of On-Chain Perpetuals, Funding Rates, and a Step-by-Step Replication of a $4.9M Exploit](https://paragraph.com/@chengmarc/when-x%C2%B7y%3Dk-breaks): chengmarc.eth, Apr 30th 2026

## Blog Information

- [Homepage](https://paragraph.com/@chengmarc/): Main blog page
- [RSS Feed](https://api.paragraph.com/blogs/rss/@chengmarc): Subscribe to updates

## Optional

- [All Posts](https://paragraph.com/@chengmarc/): Complete post archive
- [Sitemap](https://paragraph.com/@chengmarc/sitemap-index.xml): XML sitemap for crawlers