v2.10.2-beta

This release contains new features and bug fixes on top of v2.10.1.

Highlights

1. Pipelined state root computation for block import - #2180

Overlaps the state-root computation of block N with transaction execution of block N+1 during block import, improving sync and catch-up throughput. Targets import and sync, not block production.
This feature is disabled by default. To enable it, either pass the CLI flag:

bor server --pipeline.enable-import-src

or set it in config.toml:

[pipeline]
  enable-import-src = true

2. WIT2: BP-signed witness announcements - #2208

Block producers now sign a commitment over each witness, so peers can verify and relay the announcement without executing the block first, and can serve the witness body before importing it. This cuts witness-propagation latency for stateless validators several hops from a producer.

No flag or coordinated upgrade needed - the wit protocol negotiates per connection and mixed WIT1/WIT2 meshes work. A signed announcement isn't relayed past the first WIT1 hop, so upgrade each validator together with its sentries. Validators running Clef must whitelist the new mimetype application/x-bor-wit2-announce, or the producer falls back to unsigned WIT1 announcements.

Other changes

Fixes

• eth, eth/fetcher, eth/protocols/eth: retry dangling tx-fetch peers instead of excluding them forever - fixes sentries sitting with a near-empty mempool for hours after a restart (POS-3689) by @marcello33 in #2367
• consensus/bor: don't leak the live tracer into non-import system transactions - a node-wide live tracer (--vmtrace) was being fired from RPC goroutines via eth_simulateV1 and debug_trace* state regeneration by @nebojsa94 in #2353
• core/blockstm, core: exclude base-state-delegated senders from the BlockSTM v2 nonce pre-compute, where V2 and the serial processor could disagree; harden the witness parity harness by @cffls in #2383
• core, miner: fix nightly pipeline race failures by @pratikspatil024 in #2371

CI, build, and tests

• Remove support for publishing images to Docker Hub by @0xsajal in #2372
• ci: add a pipeline-enabled kurtosis e2e leg (POS-3697) by @pratikspatil024 in #2368
• ci: run kurtosis E2E safely on fork PRs by @pratikspatil024 in #2380
• ci: bump kurtosis-pos pin and Actions versions in kurtosis workflows by @kamuikatsurgi in #2370
• ci: bump kurtosis-pos pin to v1.4.2 by @marcello33 in #2377
• tests/bor: harden test peering against simultaneous-connect collisions by @pratikspatil024 in #2369
• build: increase race-test package timeout by @pratikspatil024 in #2378
• eth: avoid a race in relay-fetch test setup by @pratikspatil024 in #2387
• chore(ci): upgrade to codegenie@v0.5.6 by @0xPolygonBot in #2379
• v2.10.1 back-merge to master by @pratikspatil024 in #2390

Dependencies

• Bump github.com/pion/dtls/v3 from 3.0.11 to 3.1.4 by @dependabot in #2338
• Bump github.com/pion/stun/v3 from 3.1.1 to 3.1.5 by @dependabot in #2339
• Bump github.com/rabbitmq/amqp091-go from 1.10.0 to 1.13.0 by @dependabot in #2384
• Bump google.golang.org/grpc from 1.79.3 to 1.83.1 by @dependabot in #2381

Upgrade notes

• No hardfork, no resync, backwards compatible. #2180 is off by default and #2208 negotiates per connection with WIT1 peers.
• Docker Hub images are gone. Image publishing to Docker Hub was removed in #2372 ahead of the 1 September 2026 sunset - pull from GHCR instead. See the announcement.

New Contributors

• @0xPolygonBot made their first contribution in #2379
• @nebojsa94 made their first contribution in #2353

Full Changelog: v2.10.1...v2.10.2-beta