v1.5.3 Sepolia Arsia

Arsia is the next major Mantle network upgrade, following the Limb fork. It unifies multiple OP Stack forks (Canyon, Delta, Ecotone, Fjord, Granite, Holocene, Isthmus, and Jovian) into a single coordinated activation event.

Arsia is scheduled to activate on Mantle Sepolia at L2 block timestamp 1774422000 (Wednesday, March 25, 2026, 07:00:00 UTC).

Warning

All Mantle Sepolia node operators must upgrade to this release before the activation time.

What's Changed

• all: Activate 8 OP Stack forks (Canyon, Delta, Ecotone, Fjord, Granite, Holocene, Isthmus, Jovian) simultaneously at the Arsia timestamp via AlignOpWithMantle().
• op-node: Derivation pipeline now aligned with upstream OP Stack rules — strict batch ordering, no buffering or reordering, and deposits-only fallback on invalid payloads
• op-batcher: blob data format changed; span batch and brotli compression support
• contracts: New OperatorFeeVault predeploy at 0x420000000000000000000000000000000000001b
• contracts: Updated GasPriceOracle with Arsia fee model
• contracts: Updated L1Block with operator fee fields
• contracts: L1 SystemConfig upgraded with Arsia config: setGasConfigArsia() (replacing deprecated setGasConfig()), setEIP1559Params(), setOperatorFeeScalars(), setMinBaseFee(), and setDAFootprintGasScalar()

New Contributors

• @Rowen-S made their first contribution in #237
• @longyincug made their first contribution in #238
• @cynthia339-qa made their first contribution in #300

Full Changelog: v1.4.2...v1.5.3

Docker Images

https://hub.docker.com/u/mantlenetworkio

• mantlenetworkio/mantle-op-node:(v1.5.3)