Bor v2.8.3 is a maintenance release containing bug fixes across the miner and consensus engine, a full gRPC server implementation (disabled by default), a builder-phase streaming prefetcher, and observability, configuration, and build improvements.

What's Changed

Features

• (feat): disable pending block creation loop via flag by @manav2401 in #2175
• consensus/bor, internal/cli: full grpc implementation by @marcello33 in #2194
• prefetcher: builder-phase prefetch + streaming worker pool by @lucca30 in #2192
• (feat): tracing support for state-sync transactions by @manav2401 in #2236
• security: harden gRPC server — disable by default, bind to localhost by @harshinsecurity in #2078

Bug Fixes

• consensus: fix milestone-mismatch rewind deadlock by @kamuikatsurgi in #2246
• consensus/bor, miner: fix stale pending state for non-validator nodes by @cffls in #2183
• miner, consensus/bor: fix leaked-wedge family in worker state machine by @cffls in #2220
• miner: drop PeerCount==0 gate in mainLoop by @cffls in #2238
• consensus/bor: fix race in SpanStore.PurgeCache by @lucca30 in #2235
• miner: disable tracer in vm.Config to prevent conflicts during block synchronization by @maoueh in #2206
• ethapi: include pre-Madhugiri state-sync logs in bor_getLogs by @LarryArnault45 in #2155
• eth: stop dialing before waiting on handler shutdown by @LarryArnault45 in #2158
• eth: cancel milestone subscriber on shutdown by @kamuikatsurgi in #2199
• core/state: fix GetWriteMapDump write-set output by @AaronAjose in #2156
• core/types: guard (*Header).GetValidatorBytes against short Extra by @kajaaz in #2222
• triedb/pathdb: fix exponential memory growth in preload BFS by @lucca30 in #2187
• rawdb: recover witness size from filesystem metadata miss by @AaronAjose in #2200
• metrics, build: fix time.Tick resource leaks and oss-fuzz shebang by @haoyu-haoyu in #2145
• Fix triejournaldirectory wiring by @jschnelder in #2213

Observability & Metrics

• metrics: fix ResettingSample Prometheus _count monotonicity by @lake-dunamu in #2174
• miner, consensus: more block building metrics by @manav2401 in #2228
• miner: format build-block log times as RFC3339Nano, gate on IsRunning by @kamuikatsurgi in #2239

Configuration & CLI

• internal/cli: enabled witness filestore by default by @pratikspatil024 in #2191
• templates: replace dead witnessprotocol with witness.enable hint by @apetro2 in #2204
• packaging/docs: replace deprecated rpc.batchlimit key by @odupontt in #2216
• p2p: add flag to disable snap/1 serving by @lucca30 in #2152
• Fixing amoy static peers by @sanketsaagar in #2209

Testing, CI & Build

• all: fix nightly race test flakes by @cffls in #2193
• core/vm: add hardfork precompile continuity checks by @pratikspatil024 in #2234
• miner: fix TestPrefetchRaceWithSetExtra deadlock by @wjmelements in #2233
• ethclient: bound tx indexing wait in tests by @LarryArnault45 in #2211
• eth/fetcher: refactor witness_manager to reduce complexity by @cffls in #2188
• build: bump Go to 1.26.2 and 1.26.3 to fix stdlib CVEs by @lucca30 in #2189 and #2230
• build: bump x/net for govulncheck by @lucca30 in #2240
• build(deps): bump go.opentelemetry.io/otel/sdk from 1.40.0 to 1.43.0 by @dependabot in #2182
• ci: fix kurtosis setup/cleanup action paths by @cffls in #2223

New Contributors

• @lake-dunamu made their first contribution in #2174
• @harshinsecurity made their first contribution in #2078
• @AaronAjose made their first contribution in #2156
• @haoyu-haoyu made their first contribution in #2145
• @kajaaz made their first contribution in #2222
• @apetro2 made their first contribution in #2204
• @odupontt made their first contribution in #2216
• @jschnelder made their first contribution in #2213

Full Changelog: v2.8.2...v2.8.3

Contributors

• @maoueh
• @wjmelements
• @lucca30
• @marcello33
• @dependabot
• @manav2401
• @pratikspatil024
• @cffls
• @harshinsecurity
• @sanketsaagar
• @kajaaz
• @haoyu-haoyu
• @kamuikatsurgi
• @LarryArnault45
• @AaronAjose
• @apetro2
• @jschnelder
• @odupontt
• @lake-dunamu

What's Changed from v2.8.3-beta4

• Revert #2237 — forkid wire-format change is a breaking p2p change by @lucca30 in #2248
• consensus: fix milestone-mismatch rewind deadlock by @kamuikatsurgi in #2246

Full Changelog: v2.8.3-beta4...v2.8.3-beta5

Contributors

• @lucca30
• @kamuikatsurgi

What's different from v2.8.3-beta3: #2237 ("core/forkid: include polygon-specific forks in wire forkid") has been reverted. It was a breaking p2p change on chains where polygon-specific forks activate above block 0 (Amoy, mainnet post-fork) — upgraded nodes computed a different forkid hash than non-upgraded peers and could not establish handshakes. The fix is correct in intent but must be rolled out as a coordinated network upgrade (gated on a future fork block). It will be re-introduced in a later release that way.

What's Changed

Features

• (feat): disable pending block creation loop via flag by @manav2401 in #2175
• consensus/bor, internal/cli: full grpc implementation by @marcello33 in #2194
• prefetcher: builder-phase prefetch + streaming worker pool by @lucca30 in #2192
• (feat): tracing support for state-sync transactions by @manav2401 in #2236
• security: harden gRPC server — disable by default, bind to localhost by @harshinsecurity in #2078

Bug Fixes

• ethapi: include pre-Madhugiri state-sync logs in bor_getLogs by @LarryArnault45 in #2155
• eth: stop dialing before waiting on handler shutdown by @LarryArnault45 in #2158
• core/state: fix GetWriteMapDump write-set output by @AaronAjose in #2156
• metrics, build: fix time.Tick resource leaks and oss-fuzz shebang by @haoyu-haoyu in #2145
• triedb/pathdb: fix exponential memory growth in preload BFS by @lucca30 in #2187
• eth: cancel milestone subscriber on shutdown by @kamuikatsurgi in #2199
• rawdb: recover witness size from filesystem metadata miss by @AaronAjose in #2200
• core/types: guard (*Header).GetValidatorBytes against short Extra by @kajaaz in #2222
• consensus/bor, miner: fix stale pending state for non-validator nodes by @cffls in #2183
• miner, consensus/bor: fix leaked-wedge family in worker state machine by @cffls in #2220
• miner: drop PeerCount==0 gate in mainLoop by @cffls in #2238
• consensus/bor: fix race in SpanStore.PurgeCache by @lucca30 in #2235
• Fix triejournaldirectory wiring by @jschnelder in #2213
• miner: disable tracer in vm.Config to prevent conflicts during block synchronization by @maoueh in #2206

Observability & Metrics

• metrics: fix ResettingSample Prometheus _count monotonicity by @lake-dunamu in #2174
• miner, consensus: more block building metrics by @manav2401 in #2228
• miner: format build-block log times as RFC3339Nano, gate on IsRunning by @kamuikatsurgi in #2239

Configuration & CLI

• internal/cli: enabled witness filestore by default by @pratikspatil024 in #2191
• templates: replace dead witnessprotocol with witness.enable hint by @apetro2 in #2204
• packaging/docs: replace deprecated rpc.batchlimit key by @odupontt in #2216
• p2p: add flag to disable snap/1 serving by @lucca30 in #2152

Chain Config

• Fixing amoy static peers by @sanketsaagar in #2209

Testing

• all: fix nightly race test flakes by @cffls in #2193
• core/vm: add hardfork precompile continuity checks by @pratikspatil024 in #2234
• miner: fix TestPrefetchRaceWithSetExtra deadlock by @wjmelements in #2233
• ethclient: bound tx indexing wait in tests by @LarryArnault45 in #2211

CI, Build & Chores

• build: bump Go from 1.26.1 to 1.26.2 to fix stdlib CVEs by @lucca30 in #2189
• build(deps): bump go.opentelemetry.io/otel/sdk from 1.40.0 to 1.43.0 by @dependabot[bot] in #2182
• backport v2.7.1 to develop by @pratikspatil024 in #2190
• eth/fetcher: refactor witness_manager to reduce complexity by @cffls in #2188
• Backmerge v2.7.2 to develop by @manav2401 in #2197
• Backmerge v2.7.3 to develop by @manav2401 in #2214
• ci: fix kurtosis setup/cleanup action paths by @cffls in #2223
• chore: pos workspace setup by @marcello33 in #2218
• backport v2.8.0 to develop by @pratikspatil024 in #2227
• docs, .claude: add hardfork rollout review guidance by @pratikspatil024 in #2229
• build: bump Go to 1.26.3 by @lucca30 in #2230
• build: bump x/net for govulncheck by @lucca30 in #2240
• chore: use Claude Opus 4.7 1M context in workflows by @kamuikatsurgi in #2241
• ci: remove claude github actions by @adamdossa in #2244

Backports merged from develop (new since v2.8.3-beta)

• v2.8.2 backport: miner — track env.size in commitTransaction & set maxBlockSizeBufferZone to 1MB by @cffls in #2245
• v2.8.1 backport: eth — cap GetWitnessMetadata request hash count by @manav2401 in #2243
• v2.8.1 backport: consensus, core, params — set TxContext for state-sync transactions by @manav2401 in #2243
• v2.8.1 backport: core, eth/protocols — ensure nil receipt inclusion in p2p response by @manav2401 in #2243
• v2.8.1 backport: core, eth/protocols — fix typo follow-up by @manav2401 in #2243

Reverted (deferred to coordinated upgrade)

• (削除) core/forkid: include polygon-specific forks in wire forkid by @leovct in #2237 (削除ここまで) — reverted; see note at top.

New Contributors

• @lake-dunamu made their first contribution in #2174
• @harshinsecurity made their first contribution in #2078
• @AaronAjose made their first contribution in #2156
• @haoyu-haoyu made their first contribution in #2145
• @kajaaz made their first contribution in #2222
• @apetro2 made their first contribution in #2204
• @odupontt made their first contribution in #2216
• @jschnelder made their first contribution in #2213

Full Changelog: v2.8.2...v2.8.3-beta4

Contributors

• @maoueh
• @wjmelements
• @adamdossa
• @lucca30
• @marcello33
• @dependabot
• @leovct
• @manav2401
• @pratikspatil024
• @cffls
• @harshinsecurity
• @sanketsaagar
• @kajaaz
• @haoyu-haoyu
• @kamuikatsurgi
• @LarryArnault45
• @AaronAjose
• @apetro2
• @jschnelder
• @odupontt
• @lake-dunamu

Note: This pre-release was superseded by v2.8.3-beta4 after the inclusion of #2237 was found to be a breaking p2p change on chains with polygon-specific forks activated above block 0 (Amoy, mainnet post-fork). See v2.8.3-beta4 for the full changelog.

Full Changelog: v2.8.2...v2.8.3-beta3

Full Changelog: v2.8.2...v2.8.3-beta2

Full Changelog: v2.8.2...v2.8.3-beta

What's Changed

v2.8.2 contains a fix that prevents block producers from creating oversized blocks. This release is only required for block producers.

Full Changelog: v2.8.1...v2.8.2

Bor v2.8.1 is a maintenance release containing some bug fixes.

What's Changed

• eth: cap GetWitnessMetadata request hash count by @cffls
• consensus, core, params: set TxContext for state-sync transactions by @manav2401
• core, eth/protocols: ensure nil receipt inclusion in p2p response by @manav2401
• v2.8.1 candidate by @manav2401 in #2243

Full Changelog: v2.8.0...v2.8.1

Contributors

• @manav2401
• @cffls

This release includes the changes required for the upcoming Chicago hardfork that updates gas pricing for selected EVM opcodes and precompiles. These changes improve gas-cost alignment with execution cost and help maintain network stability.

All validators, RPC providers, node operators, and infrastructure partners should upgrade their Bor nodes before the hardfork activation block.

Activation

Full Changelog: v2.7.3...v2.8.0

If you are running amoy - please update to this version ASAP. The Chicago HF will not get activated if you are running on v2.8.0-beta

Full Changelog: v2.8.0-beta...v2.8.0-beta2