Deep Dive
1. Protocol-Level Fixes (18 December 2025)
Overview: Harmony rolled out optimizations to improve network stability and developer efficiency.
Key updates include support for the PUSH0 opcode, reducing smart contract gas costs by ~5%, and auto-recovery logic for nodes stuck during sync. New nodes now default to trusted DNS peers for faster initial synchronization. Infrastructure tooling upgrades improved observability for validators.
What this means:
This is bullish for Harmony because lower gas fees attract developers, while self-healing nodes reduce downtime risks. The changes enhance network reliability without requiring user action.
(Source)
2. Ethereum Compatibility Upgrades (31 October 2025)
Overview: Harmony implemented Ethereum Improvement Proposals (EIP-2537 and EIP-2935) to align with Ethereum’s cryptographic standards.
EIP-2537 enables BLS12-381 curve operations used in zk-rollups, while EIP-2935 introduces a ring-buffer system for accessing 1+ year of block history in smart contracts.
What this means:
This is neutral-to-bullish – developers gain advanced tooling for cross-chain apps, but the upgrades require dApps to update contracts. The changes position Harmony as a cost-effective Ethereum L2 alternative.
(Source)
3. Mainnet Release v2025.1.1 (4 July 2025)
Overview: The update focused on network performance, achieving 70% validator adoption and eliminating cross-shard view changes.
Notable changes included removing legacy consensus logic, optimizing stream sync for block propagation, and introducing Docker-based testing environments.
What this means:
This was bullish at launch, as faster finality (sub-2s) and reduced node resource requirements improved scalability. However, the impact has likely been priced in given the December upgrades.
(Source)
Conclusion
Harmony’s late-2025 updates emphasize Ethereum compatibility, node resilience, and gas optimization – strategic moves to attract developers amid broader market uncertainty. While technical debt reduction is evident, exchange delistings (e.g., EXMO in September 2025) highlight lingering ecosystem challenges.
What’s next? Will Q1 2026’s planned EVM opcode additions help reverse ONE’s -57% 90-day price decline?