Deep Dive
1. ArbOS 50 Dia Proposal (October 2025)
Overview:
Proposed as part of Arbitrum’s alignment with Ethereum’s Fusaka upgrade, ArbOS 50 Dia introduces critical Ethereum Improvement Proposals (EIPs) and technical optimizations.
Technical Highlights:
- EIP-7702: Enables externally owned accounts (EOAs) to act as smart contracts temporarily, improving wallet flexibility (e.g., gas payments in any token).
- EIP-2537: Adds BLS12-381 precompiles for zero-knowledge proofs and threshold signatures.
- Gas Limit Cap: Imposes a 32M gas limit per transaction to stabilize network performance.
- Bug Fixes: Resolves ARM/x86 execution divergence and L1 calldata pricing inconsistencies.
What this means:
This is bullish for ARB because it enhances interoperability with Ethereum, reduces computational costs for developers, and improves network stability. (Source)
2. $14M Security Audit Program (July 2025)
Overview:
The ArbitrumDAO approved a 12-month initiative to subsidize security audits for projects building on its network.
Details:
- 30M ARB Allocation: Targets early-stage projects and major upgrades.
- Whitelisted Auditors: Projects must use pre-approved firms for quality assurance.
- Oversight: Managed by a committee including Offchain Labs and DAO-elected experts.
What this means:
This is bullish for ARB as it lowers barriers for developers, reduces exploit risks, and strengthens trust in the ecosystem. (Source)
3. ArbOS 40 Callisto Upgrade (May 2025)
Overview:
Implemented native account abstraction and Ethereum compatibility upgrades.
Key Features:
- EIP-7702 Support: Enabled smart contract-like functionality for standard wallets.
- EIP-2935: Stored historical block hashes for cross-chain applications.
- Stylus VM Fix: Improved accuracy for non-existent contract interactions.
What this means:
This is bullish for ARB as it simplified user interactions and expanded developer tools, reinforcing Arbitrum’s position as a leading Layer 2. (Source)
Conclusion
Arbitrum’s codebase updates emphasize Ethereum alignment, security, and scalability. The proposed ArbOS 50 Dia upgrade and audit program signal proactive governance and developer support. With these strides, will the DAO’s focus on interoperability and security catalyze renewed institutional interest in Layer 2 solutions?