Fhenix mainnet launch: FHE Contracts Go Live Oct 21, No Token

The Fhenix mainnet launch is penciled in for Wednesday. The project's homepage banner reads "Two days to mainnet" with encrypted smart contracts going live on Ethereum and Arbitrum on October 21, and co-founder Lior Bondarevski posted just before midnight UTC on Sunday that CoFHE "goes live on mainnet in 2 days." There is still no token, and Polymarket gives one by year-end only about an 11% chance.

What actually happened

Fhenix has spent years building on encrypted computation, and until now everything ran on testnets: Arbitrum Sepolia, Ethereum Sepolia and Base Sepolia. Over the weekend the homepage switched to a countdown, and an industry newsletter noticed on Monday morning that the banner and the FAQ disagree. The banner says mainnet is two days out; the FAQ still calls mainnet "planned."

That mismatch is normal for a launch week, but it means the details people will want on day one, such as contract addresses, supported chains and fees, are not public yet. On Tuesday just after midnight UTC, the official @fhenix account teased "a little bit of BTS before the mainnet," so the team is clearly in final-prep mode.

Funding is not a mystery either: the homepage cites a $15M Series A led by Hack VC, with Amber Group, GSR and others participating, after an earlier seed round. It also lists BIPROGY, one of Japan's largest IT service providers, as a strategic investor.

What CoFHE actually does

Fully Homomorphic Encryption lets a computer do math on encrypted numbers without decrypting them. In Fhenix's design, a smart contract on a normal EVM chain hands encrypted values to the CoFHE coprocessor, which computes over them and returns encrypted results. The chain never sees the raw amounts.

The flagship use is what Fhenix calls dual-mode tokens. Its August explainer says one ERC-20 can hold a public balance, which works with DeFi like any token, and a shielded balance where amounts stay encrypted. You shield to go private and unshield to use DeFi again.

The fine print is refreshingly honest. The FAQ on that explainer says confidential transfers hide amounts and balances, but sender, receiver and timing remain visible onchain. So this is amount privacy, not anonymity. If you want the anonymity flavor of privacy trading, our ZEC-paired memecoins piece shows how that market behaves. For another infra team pitching a big architecture shift, see the Starknet L1 plan.

What Polymarket thinks

The market asks whether Fhenix launches an official, publicly tradable token by each date; an announcement alone does not count. At about 06:11 UTC on October 20, the December 31, 2026 rung traded at 0.11, with a bid of 0.09 and an ask of 0.13 on roughly $4.1K of volume. Later rungs were 0.29 for March 31, 2027, 0.385 for June 30, 2027 and 0.49 for December 31, 2027.

This is a very thin market, so a few hundred dollars can move it. Still, the shape is clear: traders do not expect a token on mainnet day and treat a token by late 2027 as a coin flip. A Fhenix mainnet launch without a token is the base case.

What to do as a reader

If you are a builder, wait for the official docs on launch day and check that contract addresses come from fhenix.io or the verified @fhenix account. Launch weeks attract fake "claim" and "mainnet bridge" sites, and since there is no token, any page asking you to claim one is a scam.

If you are just curious, the dual-mode stablecoin demo on testnet is the easiest way to see the idea. Do not expect a token or points around the Fhenix mainnet launch, and do not chase rumored airdrops with money you cannot afford to lose. Nothing here is investment advice.

Sources: Fhenix dual-mode token explainer, Fhenix homepage and Polymarket market page.