Mantle Arsia v1.5.4 moved onto Radar after the Mantle release page set the mainnet activation for April 22, 2026 at 07:00 UTC and warned node operators to upgrade before the activation time.
This is a protocol-operations story, not a trading execution note. The useful question is whether node readiness, exchange support and post-upgrade monitoring stay clean around the chain update.
What Happened
The official Mantle GitHub release says v1.5.4 activates the Arsia upgrade on Mantle Mainnet and includes audit-driven fixes. The release lists updates across op-node, op-batcher, op-service, op-chain-ops, dependencies, contracts, infrastructure and tests.
Bybit also published an April 22 announcement saying it would support the Mantle MNT v1.5.4 network upgrade. Exchange support does not replace node-operator readiness, but it does show coordination around deposits, withdrawals and user-facing infrastructure.
Why It Matters
For Radar, chain upgrades are discovery signals because they reveal how a network handles operations under deadline. The interesting details are not only the upgrade name; they are upgrade instructions, release artifacts, audit references, and whether downstream services communicate clearly.
Arsia also touches infrastructure assumptions that dapp teams and RPC providers need to track. If a chain update changes fee behavior, derivation logic, contracts or node components, the ecosystem needs clean monitoring before users can treat the post-upgrade surface as normal.
What To Watch Next
Watch for post-activation status notes, RPC provider stability, deposit and withdrawal restoration, and any follow-up release if operators report issues. Dapp dashboards should also be checked for stale data during the first hours after activation.
The next useful confirmation is boring reliability: blocks continue, providers stay synced, and exchanges restore normal service without confusing user instructions.
Radar readers should also watch how ecosystem apps communicate around the upgrade. A chain can activate successfully while individual dashboards, bridges or indexers lag behind. That makes post-upgrade app-level checks part of the discovery process, not a separate technical footnote.
Continue this cluster
The April 22 Mantle chain-ops cluster tracks protocol upgrades where node readiness, exchange support and dapp reliability matter more than token noise.
