# Fairblock Confidential DeFi On Arbitrum

> Fairates is a fixed-rate lending platform powered by Arbitrum Stylus, enabling private trading orders and auctions.

**Published by:** [ETH Daily](https://ethdaily.io/)
**Published on:** 2025-09-20
**Categories:** news, 2025, september2025
**URL:** https://ethdaily.io/787

## Content

Gm frENS. Happy Friday, you made it through the week!Quick TakeFairblock confidential DeFi on Arbitrum.Optimism maintenance upgrade 16a.FG Nexus holds 49,715 ETH.Fileverse supports passkey login.Fairblock Confidential DeFi On ArbitrumListen to this episode from ETH Daily - Ethereum News on Spotify. Fairblock introduces its confidential DeFi app on Arbitrum. Optimism announces an incremental approach to Superchain interop. And FG Nexus holds 49,715 ETH. Read more: https://ethdaily.io/787 Disclaimer: Content is for informational purposes only, not endorsement or investment advice.https://spotify.comFairblock Confidential DeFi On ArbitrumFairblock, a confidential execution protocol, introduced Fairates, its fixed-rate lending platform powered by Arbitrum Stylus. The implementation uses Stylus to run Rust-based cryptographic operations that keep sensitive computations verifiable yet private onchain. Fairblock introduces Protected Trading, where orders and auctions are encrypted until execution, ensuring fair price discovery. Fairates uses leaderless sealed-bid auctions to establish a single clearing rate, allowing borrowers and lenders to interact without slippage, manipulation, or reliance on a central auctioneer. Bids are submitted in encrypted form, and once the auction closes, validators decrypt them collectively using multi-party computation (MPC) and threshold identity-based encryption (IBE).Optimism Incremental Superchain InteropOptimism is rolling out Upgrade 16a, a maintenance upgrade that temporarily removes interop withdrawal-proving code introduced in Upgrade 16. The change follows concerns from partners, aiming to ensure stability while interop features remain under development. Upgrade 16a also introduces system-level feature toggles, enabling safer, chain-specific rollouts and paving the way for future upgrades toward native Superchain interoperability. The upgrade is scheduled for activation on October 2, 2025, pending governance approval, which is currently in progress.FG Nexus Holds 49,715 ETHFG Nexus, a public Ethereum digital asset treasury (DAT) company, announced that it holds 49,715 ETH, valued at approximately $229 million. According to Maja Vujinovic, CEO of Digital Assets at FG Nexus, Ethereum remains the premier programmable asset for institutional reserves. The company plans to use proceeds from a recent sale to acquire additional ETH and to engage in staking, restaking, liquid staking, and DeFi strategies with the goal of increasing its ETH per share. FG Nexus is listed on the Nasdaq under the ticker FGNXP and currently ranks as the 14th-largest corporate holder of ETH.Other NewsTop L2s consuming blobsBitmine buys 15,427 ETHStablecoin supply hits ATHFileverse supports passkey login$213m ETH ETF net flowsDD DevConnect GiveawaySynthetix on returning to L1NFT Strategy live on mainnetETH Strategy PN week 3 recapThe Rollup live with Tim BeikoComposability Space w/ Justin DrakeWhiteboard to Mainnet episode 2Edge City residency listThat's it for this week! If you enjoyed the read, please support us with a donation 🌱Disclaimer: Content is for informational purposes only, not endorsement or investment advice. The accuracy of information is not guaranteed.

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