Fhenix Testnet Guide 2026 — CoFHE, Networks & Getting Started

Fhenix / Testnet guide

Fhenix Testnet: CoFHE & Confidential Smart Contracts

The Fhenix testnet is the practical entry point for exploring Fully Homomorphic Encryption in EVM applications. The current product direction is CoFHE, an FHE coprocessor that handles encrypted computation off-chain while applications remain compatible with familiar EVM tooling.

Fhenix currently lists CoFHE on Ethereum Sepolia, Arbitrum Sepolia and Base Sepolia. That makes the ecosystem interesting for both developers testing confidential contracts and users following new privacy-focused applications.

Ethereum Sepolia

A public Ethereum testnet where CoFHE can be explored and where Fhenix has published encrypted-application demos.

Arbitrum Sepolia

An EVM testnet deployment that brings CoFHE-style encrypted computation to the Arbitrum ecosystem.

Base Sepolia

A further public testnet deployment for experimenting with confidential smart contracts on Base.

How to approach the Fhenix testnet

The exact task list can change as Fhenix moves from demonstrations toward broader product deployments. Use the current application instructions rather than old screenshots or copied quest lists.

Choose the network first. Confirm that the application you are opening matches the testnet it currently supports.
Fund the wallet with test ETH. Use a reputable faucet for the relevant testnet; never use mainnet ETH just to complete a testnet task.
Connect only to the intended application. Check the domain before approving a wallet connection or signature.
Complete real interactions. If the application asks you to encrypt, compute, transfer or interact with a confidential contract, follow its current instructions.
Save your activity. Keep wallet addresses and transaction hashes if you are researching future eligibility or writing a personal activity log.

Fhenix Airdrop Fhenix Testnet Redact Testnet What is Fhenix?

CoFHE is a technology platform, not an automatic airdrop mechanism. Testnet participation can be useful for learning and ecosystem activity, but never treat it as a guaranteed token entitlement.