According to The Defiant, Arbitrum officially activated the ArbOS 61 Elara upgrade on August 20, following approval via ArbitrumDAO governance voting. The core features of this upgrade include: introducing an optional protocol-level transaction filtering mechanism for Dedicated Chains, allowing chain owners to independently configure restricted address rules using third-party compliance services such as TRM Labs or Chainalysis; filtering is disabled by default and does not affect existing Arbitrum One users; adding support for Priority Fees, also disabled by default, with enabling on Arbitrum One requiring a separate DAO constitutional vote; introducing the BaseFeeManager contract, authorizing Offchain Labs to adjust the L2 minimum gas fee within a range of 0.01 to 0.10 gwei, subject to DAO approval, with an authorization period of two years; additionally, the Stylus contract code size limit has been increased from 24 KB to 96 KB, though this does not apply to Solidity contracts.
Arbitrum Activates ArbOS 61 Elara Upgrade with Compliance Filters and Priority Fee Support
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Summary
Arbitrum activated the ArbOS 61 Elara blockchain upgrade on August 20, 2026, following approval by ArbitrumDAO. The network upgrade introduces optional compliance filters for Dedicated Chains, enabling integration with third-party services such as TRM Labs and Chainalysis. It also adds priority fee support, which is disabled by default on Arbitrum One. A BaseFeeManager contract allows L2 gas fee adjustments between 0.01 and 0.10 gwei for a two-year period. The Stylus contract code size limit increased from 24 KB to 96 KB, excluding Solidity contracts.
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