Whitechain evolves from PoA L1 to OP Stack Ethereum L2

August 18, 2026

Whitechain is officially evolving from a standalone proof-of-authority L1 into an Ethereum L2 powered by the OP Stack, with its Whitechain Sepolia Testnet now live. The upgrade is another chain choosing the OP Stack.

Sources

Another chain choosing the OP Stack. Welcome, Whitechain. https://t.co/RcNCO4y0lS Quoting @Whitechain_io: We’ve been quiet because we were building the upgrade Whitechain deserves! Whitechain is officially evolving from a standalone PoA L1 into an Ethereum L2 powered by the OP Stack. The Whitechain Sepolia Testnet is LIVE today. 🧵👇 https://t.co/9DViUDT29yx.com ↗

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Whitechain evolves from PoA L1 to OP Stack Ethereum L2 — Outposts