Deep Dive
1. Protocol Fixes & PUSH0 Support (18 December 2025)
Overview: This update made the network safer and more consistent, particularly around how transactions use gas. It also introduced support for a new Ethereum operation code.
The changes include several fixes at the protocol level, improving how the network handles recent Ethereum upgrades. A key addition is the PUSH0 opcode, which allows smart contracts to be written more efficiently, reducing their size and the gas needed to run them. Sync behavior was also improved so that nodes can automatically recover if they get stuck, enhancing overall network stability with less need for manual intervention. New nodes now start with trusted peers by default, making the initial synchronization process more reliable.
What this means: This is bullish for $ONE because it makes the network more robust and cost-effective for developers. Faster, self-healing nodes mean a smoother experience for users and validators, while cheaper contract deployment could attract more projects to build on Harmony.
(Source)
2. Major Network Upgrades & Stream Sync (31 October 2025)
Overview: This was a comprehensive set of upgrades to boost Harmony's speed, compatibility with Ethereum, and data accessibility for smart contracts.
The network now supports EIP-2537, enabling advanced cryptography used for zero-knowledge proofs and secure bridges. It also added EIP-2935, which gives contracts access to a deeper history of block data, enabling new applications like more reliable oracles. Furthermore, the team introduced Stream Sync, a new peer-to-peer system that replaces the older, more centralized method for nodes to download the blockchain, making the process faster and more resilient.
What this means: This is very bullish for $ONE as it significantly closes the gap with Ethereum, making Harmony a more attractive platform for developers building complex, cross-chain applications. The improved sync technology also strengthens network decentralization and reliability.
(Source)
3. v2025.1.1 Mainnet Release (Q2 2025)
Overview: This major mainnet release focused on core protocol improvements, delivering faster consensus and a cleaner, more efficient network infrastructure.
The upgrade included optimizations to the consensus mechanism and peer-to-peer (P2P) networking, which were adopted by 70% of validators and resulted in zero view changes across shards—a sign of exceptional network stability. It also featured advances in the Stream Sync technology and introduced new development tools and monitoring dashboards to help builders and node operators.
What this means: This is bullish for $ONE because it demonstrates active development and a commitment to technical excellence. A more stable and observable network foundation is critical for supporting future growth and complex decentralized applications.
(Source)
Conclusion
Harmony's recent development trajectory shows a clear focus on strengthening core infrastructure, enhancing Ethereum compatibility, and improving the developer experience. These foundational upgrades are essential for the network's long-term competitiveness and adoption. How will the planned Q1 2026 hardfork, targeting near one-second finality, further accelerate this momentum?