Fhenix CoFHE Goes Live on Ethereum and Arbitrum Mainnet
By Node Zero
October 21, 2026
Fhenix said on Wednesday, October 21, 2026 that its CoFHE coprocessor — built on fully homomorphic encryption — is now in production on Ethereum and Arbitrum mainnet, moving encrypted smart-contract computation off public testnets. Coverage from Unchained and the company’s own docs put the pitch simply: contracts can compute on balances, positions, and strategies that stay encrypted while still enforcing onchain rules. This is a Dev Pulse cryptography-rail chapter — not a marketplace listing change and not a custody M&A beat.
CoFHE handles heavy FHE work off-chain and returns results to contracts on both chains. Developers add it with a single Solidity import and encrypted types that Fhenix says behave like ordinary variables. The launch also puts Fhenix’s dual-mode token design into production: a holder can move a balance into confidential mode in one transaction and switch it back later, without wrapping or bridging, while tokens stay on their home chain. Fhenix’s site notes mainnet intake is permissioned at launch (allowlisted contracts); Ethereum Sepolia, Arbitrum Sepolia, and Base Sepolia stay open for everyone.
Day-one design partners named in the Unchained wrap: Fluton (confidentiality engine / encrypted intents) and AlphaEngine (strategists compete with encrypted strategies). Fhenix says three more apps are planned on CoFHE in Q4, plus two institutional partnerships to name in coming weeks. Founder Guy Zyskind said the team is working on a confidential stablecoin with Tandem (Offchain Labs’ venture arm). Fhenix claims a Consensys Diligence audit before launch; Unchained reported it could not find a public audit PDF — treat that as company claim until a report link lands. Offchain Labs CEO Steven Goldfeder is quoted backing composable privacy on Arbitrum-adjacent rails.
For NFT and marketplace desks, the useful cut is confidential balances and private strategy rails that can sit next to public floors: dual-mode tokens aim to keep wallet/DEX compatibility while hiding amounts — but Fhenix’s own design notes still leave sender, receiver, and timing visible onchain, and confidential-mode DeFi compatibility is narrower than the public mode. Do not treat CoFHE mainnet as “invisible NFT ownership” or as a fix for marketplace wash tape.
Prior Solana Alpenglow LN stays a separate consensus chapter; today’s beat is EVM FHE coprocessor production plus dual-mode tokens and two named apps. Compare carefully to other FHE stablecoin experiments (Zama/cUSDC freeze history is secondary context only — not a Fhenix incident).
Protocol watch: Watch whether Fhenix publishes the Consensys Diligence report, when allowlist intake opens beyond design partners, whether the three Q4 apps and Tandem confidential stablecoin ship with named contracts, and whether dual-mode tokens show real DEX volume on Ethereum or Arbitrum — the desk cares about live allowlist scope and verified audit artifacts, not the privacy slogan alone.
Bottom line: Fhenix CoFHE is in production on Ethereum and Arbitrum with dual-mode tokens and two day-one apps — encrypted computation is live, but mainnet intake stays allowlisted and the Diligence audit still needs a public artifact.
Disclaimer: This article is provided for informational and educational purposes only. It does not constitute financial, investment, legal, or trading advice. The cryptocurrency and NFT markets are highly volatile, and past performance is not indicative of future results. Readers should conduct their own research and consult qualified professionals before making any decisions related to digital assets. The cover image for this article may have been created using artificial intelligence (AI).
