Deep Dive
1. Arsia Mainnet Upgrade (22 April 2026)
Overview: This mandatory upgrade for all node operators activated eight OP Stack forks (Canyon through Jovian) simultaneously. It introduces a new gas fee model and an OperatorFeeVault, making transaction costs more predictable and efficient for users.
The Arsia upgrade represents a major synchronization with upstream OP Stack development. It enforces strict batch ordering in the derivation pipeline and changes the blob data format in the batcher, supporting span batches and brotli compression for better data efficiency. A new pre-deployed contract at address 0x420000000000000000000000000000000000001b collects operator fees.
What this means: This is bullish for Mantle because it delivers a more stable and cost-effective network for developers and users. The coordinated upgrade reduces complexity, and the new fee model could lead to lower and more predictable transaction costs during periods of high demand.
(Releases · mantle-xyz/mantle-v2)
2. Limb Mainnet Fork (14 January 2026)
Overview: This required fork prepared the Mantle Mainnet to support all features of Ethereum's Osaka upgrade. It fundamentally changed how the network queries and verifies data from Ethereum's new blob-carrying transactions.
The update made the op-node compatible with the "Osaka" version of op-geth. It shifted from using execution-layer RPC calls to the new consensus-layer endpoint (eth/v1/beacon/blobs/) for fetching blob data. Verification now uses KZG commitments, a more secure cryptographic method. The batcher was also updated to support new submission flags and retrieve blob base fees directly from L1.
What this means: This is bullish for Mantle because it ensures the network stays seamlessly compatible with Ethereum's core advancements. For users, this means Mantle can securely and efficiently leverage Ethereum's latest scalability features, future-proofing the chain.
(Releases · mantle-xyz/mantle-v2)
3. Everest Mainnet Release (Late 2025)
Overview: This release marked the official activation of EigenDA on the Mantle mainnet, replacing the previous MantleDA system. It also included necessary preparations for the upcoming Ethereum Pectra upgrade.
The integration of EigenDA, a decentralized data availability layer, is a core tenet of Mantle's modular architecture. This change significantly reduces the amount of data sent to Ethereum Layer 1, which is the primary driver of lower gas fees on Mantle. The update also included backend compatibility work to ensure a smooth transition during Ethereum's next hard fork.
What this means: This is bullish for Mantle because it solidifies its modular infrastructure, directly leading to the low fees users experience. A robust data availability layer enhances network security and paves the way for further scalability.
(Releases · mantle-xyz/mantle-v2)
Conclusion
Mantle's recent codebase evolution demonstrates a clear trajectory from establishing its modular, EigenDA-powered foundation to achieving deep Ethereum compatibility and now unifying major performance upgrades. This disciplined, upgrade-focused development strengthens its position as a scalable Layer 2. How will Mantle's architecture evolve to further bridge its CeDeFi narrative with autonomous agent economies?