taiko-geth v2.8.0

This consensus-sensitive release fixes the EVM gas limit used during Taiko block building, adds Glamsterdam L1 header compatibility, and fixes Prometheus metrics after transaction-list witness requests.

Consensus and compatibility

• Set the protocol gas limit on both the block header and the sealing EVM context in both Taiko block-building paths. This makes the GASLIMIT opcode return the same value during block building and import, preventing execution discrepancies. See #615.
• Preserve the EIP-7928 blockAccessListHash commitment in L1 header JSON/RLP encoding, header copies, and RPC responses. This keeps locally computed L1 header hashes consistent with the canonical RPC hashes used for anchor construction and reorg checks. See #611.
• Reject blockAccessListHash and slotNumber in Taiko L2 headers across all supported eras, and reject block access list commitments before Amsterdam in non-Taiko Beacon header validation.

The L1 header changes provide header compatibility; they do not add full Ethereum Amsterdam/BAL execution support.

RPC and observability

• Use a Prometheus-safe prefetcher metric namespace for debug_executionWitnessForTxList. This prevents transaction-list witness requests from causing subsequent Prometheus scrapes to fail. See #613.

Upgrade notes

All node runners still using taiko-geth are strongly encouraged to upgrade to v2.8.0 as soon as possible. This includes both block producers and nodes deriving blocks from L1.

Users already running alethia-reth do not need to upgrade their nodes for this taiko-geth release.

Full changelog: v2.7.0...v2.8.0