Arbitrum: Activate the Elara upgrade to provide optional compliance screening and priority fee functions for the dedicated chain

Comparatively, according to The Defiant, Arbitrum activated the ARBos 61 Elara upgrade on August 20, adding optional protocol-level transaction screening, priority fee support, and alternative data availability interfaces to the dedicated chain, and adjusted Arbitrum One's basic fee management and expanded Stylus contract capacity. The compliance screening function is disabled by default. Chain owners are required to actively configure an external compliance service provider (such as TRM Labs or Chainalysis) and set rules to double execute through simulated transactions and on-chain protection mechanisms.

The priority fee function is also disabled by default and requires the chain owner to enable it through pre-compilation. Priority fee collection on Arbitrum One still requires a separate DAO vote. Elara also introduced the BaseFEeManager contract, which allows Offchain Labs to adjust the base fee within 0.01 to 0.1 gwei approved by the DAO, which is valid for two years. Stylus contract code size limit increased from 24KB to 96KB, not applicable to Solidity contracts.