Arbitrum's ArbOS Dia Goes Live With Passkeys, Better Fees, and Interop Gas Tokens

Source: CryptoNewsNet Original Title: Arbitrum’s ArbOS Dia Goes Live With Passkeys, Better Fees, and Interop Gas Tokens Original Link:

Overview

Arbitrum has released the ArbOS Dia upgrade for Arbitrum One and Arbitrum Nova. The upgrade targets smoother layer-two fees, higher throughput, and updated tooling.

Key Updates:

• Smoothed fee pricing to reduce spikes during demand surges
• Raised minimum base fee to 0.02 gwei from 0.01 gwei
• Added passkey-ready secp256r1 support for user onboarding
• Expanded custom-chain gas token support through Native Token Mint/Burn
• Integrated Fusaka-era EVM improvements

Fee Optimization

Dia changes how Arbitrum sets the layer-two base fee during demand spikes. It replaces one gas target and one adjustment window with several higher targets and longer windows. The higher minimum base fee helps reduce spam-style bot activity and aims to keep fee movements steadier when usage rises. The pricing update targets lower severity, lower frequency, and shorter duration of high fees.

Arbitrum linked the fee curve change to network economics. The higher minimum base fee can help balance DAO revenue as the curve becomes smoother. However, the upgrade does not change Arbitrum’s role as an Ethereum-aligned layer-2 network.

Dia prepares the network for more throughput on similar hardware by updating Arbitrum’s state transition function to track gas across resource types, including computation, storage access, storage growth, and history growth.

Onboarding and Interoperability

For app teams, Dia updates support for secp256r1 so that passkey-style signing matches Ethereum’s planned post-Fusaka behavior. Developers can now build onboarding experiences with passkeys, face ID or fingerprint prompts, and device-secured keys, while also supporting recovery flows and enterprise authentication layers.

Dia adds flexibility for native gas tokens on custom Arbitrum chains through Native Token Mint/Burn, allowing chains to delegate minting and burning to trusted bridge providers. Supported standards include LayerZero OFTs, xERC20s, native USDC, and native USDT. However, this feature will not be available on Arbitrum One.

Technical Enhancements

Dia adjusts block packing rules to reduce skipped transactions under load. A new per-transaction limit lets the last transaction use up to MaxTxGasLimit, which may slightly exceed the prior MaxBlockGasLimit while keeping overall targets unchanged.

Dia also brings selected Fusaka-era EVM changes into Arbitrum chains, including updated secp256r1 semantics, the CLZ opcode, ModExp repricing, and BLS12-381 curve operations. On the node side, it adds support for the eth_config RPC method and applies related networking and history updates where relevant.

The rollout sets a foundation for smoother fees, passkey onboarding, and broader gas-token interoperability on custom chains.