Arsia is a major network upgrade that overhauls Mantle's fee model by separating L1 data costs from L2 execution gas, introduces a new dynamic EIP-1559 base fee and operator fee.
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
- Revamped Fee Model: L1 data cost and operator cost are pre-paid at transaction start and excluded from
gasUsed, which now purely reflects L2 execution gas. ThetokenRatiomultiplier is removed from gas calculations, and standard EVM refund logic is restored. - Operator Fee: Introduces a new operator fee charged per transaction, routed to a dedicated
OperatorFeeRecipientaddress. - L1 Cost Function Upgrade: Transitions from the legacy Bedrock formula to a Fjord-style cost function.
- Dynamic EIP-1559 Base Fee: Base fee is no longer frozen — it dynamically adjusts based on gas usage and DA footprint utilization, with configurable EIP-1559 parameters (denominator, elasticity, minimum base fee) encoded in the block
extraDatafield. - DA Footprint Tracking: The
BlobGasUsedheader field is repurposed to track per-block DA footprint, with a block-level limit enforced during block building. - New API
eth_estimateTotalFee: Returns the total estimated transaction cost (L2 execution + L1 data + operator fee). Gas estimation no longer applies the pre-Arsia 120% buffer.
Bug Fixes (v1.4.2 → v1.5.3)
- Fixed
tokenRatiocache issue: where a token ratio update transaction's receipt used the new token ratio instead of the old value (#152).
New Contributors
- @Rowen-S made their first contribution in #127
- @rlverside made their first contribution in #130
- @cynthia339-qa made their first contribution in #149
Full Changelog: v1.4.2...v1.5.3
Docker Images
https://hub.docker.com/u/mantlenetworkio
- mantlenetworkio/mantle-op-geth:(v1.5.3)