Release notes

This release improves node robustness, restart safety, RPC compatibility, and runtime performance, especially for Flat DB users, RPC-heavy workloads, and chains relying on upcoming hardfork or EIP support.

Overview

Full diff: https://github.com/NethermindEth/nethermind/compare/1.37.2…release/1.38.0

372 changes since 1.37.2. Highlights include the Taiko Unzen hardfork, parallel transaction execution with Block-level Access Lists (EIP-7928), new EIPs (EIP-7981 access-list token floor pricing, EIP-7976 calldata floor cost, EIP-4444 EraE history expiry), Flat DB layout persistence, a large round of JSON-RPC correctness fixes, and EVM/state hot-path optimizations.

Highlights

Consensus & EIPs

Taiko Unzen hardfork implemented (#11281)
Parallel transaction execution with BALs (#9182), additional BAL hive tests (#11285)
EIP-7981 — Access list token floor pricing (#11311)
EIP-7976 — Increase calldata floor cost (#11293)
EIP-4444 EraE support (#10812)
Enforce EIP-3675 uncle ban at the spec level (#11302)
Gnosis Osaka (#10906)

State & storage

Persist FlatLayout and refuse mismatched restarts (#11271)
Flat-state storage cleanup and snapshot fixes (#11133, #11401, #11414)
Reduce dirty nodes lock contention (#11297)
StateComposition plugin — real-time state metrics (#10995)

Performance

Embed Address bytes inline to remove secondary allocation (#11469)
Optimize EVM stack (#11230) and EvmMemory (#11247)
Optimise parallel execution: reduce worldstate / txprocessor allocations (#11318)
More optimizations for precompile caching (#11373, #11309)

RPC & correctness

admin_* peer-management endpoints improvements (#11489)
Numerous eth_simulateV1, eth_call, eth_estimateGas error-code and gas-cap fixes
txpool_content / txpool_contentFrom / txpool_status fixes (#11305, #11417)
/health endpoint ClUnavailable regression fix (#11474)

Networking & sync

Upgrade discv5 (#11419)
Lock-free sync allocation slots per peer (#11361)
Remove NodeData satellite protocol (#11359) and long-range catch-up sync (#11123)

Chain-specific

XDC: forensics processor, epoch switch manager, subnet block building, and multiple fixes
Taiko: batch lookup RPC methods (#11021), Shasta fork on Alethia (#10984)
Add new Anchor Transaction Type for Surge realtime (#10320)

What’s Changed

Bal devnet 3 by @Marchhill in #10697
Restore Taiko FCU timestamp validation allowing equal timestamps by @jmadibekov in #10810
refactor: comprehensive test and code deduplication by @LukaszRozmej in #10815
chore: Update packages by @rubo in #10827
refactor(specs): flatten fork inheritance into parent-based Apply chain by @LukaszRozmej in #10825
Make state available if not pruned by @flcl42 in #10822
Update OP Superchain chains by @core-repository-dispatch-app [bot] in #10837
Auto-update fast sync settings by @core-repository-dispatch-app [bot] in #10836
Kch/sync supported fix by @kamilchodola in #10823
chore: Revise spell checking by @rubo in #10838
fix(rlp): pass ValueDecoderContext by ref in DecodeStorageRootOnly by @reject-i in #10842
fix(db): return null for missing key in SimpleFilePublicKeyDb.Get by @reject-i in #10843
Simplify releasing & fix IByteBuffer leaks in tests by @alexb5dh in #10814
fix: IByteBuffer leak in ZeroSnappyEncoder.Encode by @newmanifold in #10833
fix(ci): free disk space for Pyspec test jobs by @benaadams in #10845
fix(ssz): Uint128 decode method swapped upper and lower halves by @kevaundray in #10794
fix(ssz): Merkleizer list Feed now uses correct chunk limit and actual length for mixin by @kevaundray in #10795
fix(ssz): Add validation checks for BitList and BitVector by @kevaundray in #10796
fix(ssz): Container decode logic for BitVector and validation fixes for container input by @kevaundray in #10797
fix: dispose IncrementalHash in E2StoreWriter by @ninastef in #10847
feat: Add Codex review workflow by @rubo in #10832
fix: Update Trivy scanner workflow by @rubo in #10852
fix(ssz): mix in count=0 (not limit) for null/empty lists in MerkleizeList templates by @MarekM25 in #10828
fix: remove unreachable code in ModExpPrecompile by @Fallengirl in #10826
BALs remove unneeded delegation check by @Marchhill in #10860
fix: rpc-compat hive tests by @deffrian in #10846
fix: prevent torn reads of TrieNode._rlp using seqlock pattern by @benaadams in #10857
Fix event handler leaks, reduce allocations, and refactor Network layer by @benaadams in #10753
Re-enable ReadyToRun AOT compilation by @benaadams in #10848
fix: handle tuple disposal in TryDispose to prevent resource leaks by @newmanifold in #10839
fix: IByteBuffer leak in EnrResponseMsgSerializer & ArrayPoolSpan OOB by @newmanifold in #10853
Remove EOF by @benaadams in #10866
Check logs RLP by @flcl42 in #10862
feat: add maxUsedGas to eth_simulateV1 results by @MysticRyuujin in #10863
fix: fix resource leak in ChannelDecoder compression streams by @kseniaeremekno in #10865
fix: fix CancellationTokenSource leak in StartingSyncPivotUpdater by @ninastef in #10859
fix: fix encryptor leak in AesCtr method by @ninastef in #10851
feat: restore edge/block collection and runtime consumption by @benaadams in #10869
chore: Revise CODEOWNERS by @rubo in #10874
chore: Unify precompile naming by @rubo in #10875
feat: add –force-resync and –purge-db CLI flags by @benaadams in #10871
test: Add MODEXP precompile tests by @rubo in #10888
fix: fix HttpResponseMessage leak in DefaultHttpClient by @kseniaeremekno in #10889
fix(test): add missing isLeaf assertion in HexPrefixTests by @zeroprooff in #10895
fix: fix HttpResponseMessage leak in BasicJsonRpcClient by @kseniaeremekno in #10873
fix(ssz): use container.Count instead of limit in MerkleizeList for Union types by @davidjsonn in #10747
feat(ssz): Add spec tests for ssz by @kevaundray in #10807
fix(test): replace fork type checks with spec flag checks in test harness by @LukaszRozmej in #10896
test(keystore): remove duplicate Salt32Test by @zeroprooff in #10901
fix: raise snap response limits to prevent SnapSync regression by @kamilchodola in #10904
docs: overhaul README structure and content by @Giri-Aayush in #10856
fix(test): eliminate flakiness in BlockchainProcessorTests by @LukaszRozmej in #10905
test: Add BLAKE2F precompile tests by @rubo in #10909
test: Add SHA256 precompile tests by @rubo in #10910
Fix flaky test: replace polling with signal-based loop in BecomesNewHead by @Copilot in #10884
Fix ArgumentException in SnapshotRepository.GetSnapshotBeforeStateId for negative BlockNumber by @Copilot in #10882
Auto-update fast sync settings by @core-repository-dispatch-app [bot] in #10914
Update OP Superchain chains by @core-repository-dispatch-app [bot] in #10913
fix: fix inverted dispose logic in BackgroundTaskScheduler by @kseniaeremekno in #10907
fix(db): reuse ReadOptions in ColumnDbSnapshot to reduce GC pressure by @smartprogrammer93 in #10894
Fix flaky DiscoveryPersistenceManager test on macOS CI by @smartprogrammer93 in #10912
Fix test chainspec configuration to prevent spurious misconfiguration warnings by @Copilot in #10881
fix: BackgroundTaskScheduler disposal deadlock causing CI timeouts by @benaadams in #10927
Fix AuRaMergeEngineModuleTests by @Marchhill in #10872
Dispose on exception by @flcl42 in #10921
Gnosis Osaka by @Marchhill in #10906
Remove duplicate assertion in SnapshotCompactorTests by @zeroprooff in #10923
Fix buffer leak tests to use PooledBufferLeakDetector by @newmanifold in #10887
test: update pyspec fixtures to v5.4.0/v5.5.1 and adapt to forked release layout by @benaadams in #10931
fix(flat): periodically clear ReadOnlySnapshotBundle cache by @asdacap in #10922
Connection reset metric by @asdacap in #10935
Reinstate removed IGasPolicy methods and apply for eip-8037 by @damian-orzechowski in #10897
Migrate TxGossipPolicy to DI using OrderedComponents by @asdacap in #10941
fix: remove duplicate NewHeadBlock unsubscription in PoSSwitcher by @eeemmmmmm in #10938
chore: add fix-nethtest agent skill for EF test debugging by @LukaszRozmej in #10903
test: add engine blockchain pyspec fixtures and fix BAL gas budget tracking by @benaadams in #10939
perf: add fast MVCC snapshots for MemDb in FlatDb tests by @asdacap in #10792
New constructor by @damian-orzechowski in #10950
Extend CallResult constructor visibility by @damian-orzechowski in #10949
Fix incorrect NodeType in TrieNodeTests by @zeroprooff in #10917
fix(zkevm): Fix RLP serialization and EVM memory for zkEVM by @rubo in #10960
Fix EIP-158 system account test to use IWorldState interface by @asdacap in #10969
fix: resource leak — ArrayPool, double-dispose, CTS, event handlers & Resource Leak audit skill by @newmanifold in #10951
Move balance change in RefundOnFailContractCreation by @damian-orzechowski in #10974
fix: Flaky Nethermind.Blockchain.Test by @newmanifold in #10967
FCU Canonical chain corruption after beacon sync (3 fixes + startup healing) by @svlachakis in #10876
FlatDB dictionary lookup optimization by @asdacap in #10738
fix(zkevm): Disable async state and trie processing for zkEVM by @rubo in #10979
chore(taiko): activate Shasta fork on Alethia by @smartprogrammer93 in #10984
BlockTree DI by @svlachakis in #10982
fix: resolve flaky payload CTS ObjectDisposedException by @LukaszRozmej in #10990
fix: reduce Hive engine-withdrawals parallelism to 2 by @newmanifold in #10992
Add New Anchor Transaction Type for Surge realtime by @dipkakwani in #10320
Update OP Superchain chains by @core-repository-dispatch-app [bot] in #10987
Auto-update fast sync settings by @core-repository-dispatch-app [bot] in #10988
Test: Maybe improve Ethereum.Transaction.Tests stability. by @asdacap in #10989
Fix admin_peers by @flcl42 in #10978
Don’t check BALs if no validation is required by @flcl42 in #10973
feat(witness-generation): Make WitnessCapturingTrieStore explicitly readonly by @hudem1 in #10701
Fix remaining gas calculation by @flcl42 in #10999
fix: prevent protocol handler memory leak from Autofac dispose tracking by @newmanifold in #11000
perf: Replace ZeroContentionCounter with thread-aware metric counters by @benaadams in #11005
fix: guard ClearStaleMarkersAbove behind forceUpdateHeadBlock by @asdacap in #11004
perf: Reduce per-peer object allocations in P2P layer (-2.25M objects, -54MB) by @benaadams in #11007
Don’t record BALs during transaction picking by @flcl42 in #10971
Follow up to PR11007 by @benaadams in #11008
fix: Set MainThreadCodeDbCache to public (for arbitrum) by @hudem1 in #11010
fix: register ISnapServer in production DI to restore snap serving by @newmanifold in #10986
eth_getStorageValues by @svlachakis in #10977
Add stall timeout margin before FlatDb compactor warning by @asdacap in #10983
perf: Clear BlockAccessList and AccountChanges before caching blocks by @benaadams in #11014
perf: Replace ConcurrentHashSet with lease-guarded HandlerBag in RetryCache (~75 MB alloc reduction) by @benaadams in #11009
refactor: Move merkleization metrics to IWorldStateScopeProvider by @asdacap in #10925
Support EIP-7949 and update hoodi spec accordingly by @flcl42 in #10046
XDC mainnet sync configs by @batrr in #10820
fix: dispose evicted envs from BlockCachePreWarmer pool by @newmanifold in #11013
feat(taiko): add certain batch lookup RPC methods by @smartprogrammer93 in #11021
fix: Replace logger resolution with explicit type-based loggers by @benaadams in #11019
fix(evm): include initcode state gas in block accumulator on code deposit failure by @qu0b in #11001
Fix/xdc block building by @ak88 in #10809
Fix merge plugin tests for FlatDb and add to flat CI by @asdacap in #10919
ci: add static analysis enforcement to build pipeline by @newmanifold in #11025
ci: add known failing Invalid Missing Ancestor Syncing ReOrg hive tests by @newmanifold in #11028
fix(test): fix flaky Special_Tx_Is_Executed_Before_Normal_Txs nonce collision by @newmanifold in #11033
Fix trace_transaction and trace_replayTransaction returning HTTP 500 by @svlachakis in #11047
Update OP Superchain chains by @core-repository-dispatch-app [bot] in #11039
Add NETH001 custom Roslyn analyzer for unused new expressions by @asdacap in #11044
Fix/xdc spec by @ak88 in #11032
ci: add known failing snapsync hive test by @newmanifold in #11037
Handle invalid blocks in hive runner by @flcl42 in #11049
fix: respect CLI override for SnapServingEnabled by @AnkushinDaniil in #11051
fix: lower SoftOutgoingMessageSizeLimit to 2 MB to match Geth by @AnkushinDaniil in #11050
fix: register ISnapServer in FlatWorldStateModule DI by @AnkushinDaniil in #11052
Fix debug_executionWitness for Taiko plugin by @jmadibekov in #11058
Lower Ethash cache level logs - no need to spam them for history blocks by @LukaszRozmej in #11061
Update Dockerfiles by @core-repository-dispatch-app [bot] in #11057
Auto-update fast sync settings by @core-repository-dispatch-app [bot] in #11040
Fix unchecked SequenceEqual in Eip4844Tests by @Bilogweb3 in #11036
Don’t return state gas by @flcl42 in #11031
test(wallet): remove duplicate UnlockAccounts test case by @Ocheretovich in #11029
chore: Update GitHub Actions by @rubo in #11063
chore: Update Nethermind banner by @rubo in #11064
feat: make debug_executionWitness compatible with FlatDb by @asdacap in #11045
fix: add SnapServingMaxPathsPerGroup config to raise snap RLP path limit by @AnkushinDaniil in #11053
refactor: extract FullPruner init into overridable IFullPrunerFactory by @asdacap in #11066
feat(flat-state): remove read node dictionaries from SnapshotBundle by @asdacap in #10993
Fix blockchainbridge for XDC by @ak88 in #11065
Fix for 4844 in XDC by @ak88 in #11070
chore: Remove OP diff workflow by @rubo in #11071
feat(zkevm): Refactor stateless executor by @rubo in #10629
Perf/xdc by @ANtutov in #10295
fix AuRaBlockFinalizationManager unclean shutdown by @LukaszRozmej in #11062
Xdc testnet config by @ak88 in #11012
fix: resolve tx type based on target block fork in eth_call by @LukaszRozmej in #11074
eth_estimateGas fix error decoding by @svlachakis in #11077
feat(cache): Add AssociativeCache - lock-free set-associative cache with lower memory by @benaadams in #10991
test: Simplify testing workflows by @rubo in #11075
XDC implement BlobBaseFee handling by @batrr in #11078
Fix code-lint workflow: disk space, caching, and duplicate annotations by @newmanifold in #11080
Refactor sync-supported-chains workflow and add sync smoke test CI check by @kamilchodola in #10898
refactor: remove Personal module from default RPC modules by @LukaszRozmej in #11084
refactor: Make some methods and interfaces available for overriding CALL opcode from Arbitrum plugin by @hudem1 in #11011
fix: add bounds on filter address and topic array sizes by @LukaszRozmej in #11087
fix: validate signature length in personal_ecRecover by @LukaszRozmej in #11090
Fix decoding of empty receipts of a block by @flcl42 in #11093
Snapshot - Big Files & Improvements by @svlachakis in #10735
ci: add missing flaky hive test entries for Invalid Missing Ancestor Syncing ReOrg by @newmanifold in #11082
chore: Revise CODEOWNERS by @rubo in #11099
fix: validate filter string length before re-parsing by @LukaszRozmej in #11086
fix(crypto): implement IHash64bit for Hash256AsKey by @JayeTurn in #11091
XDC Fix duplicate votes in pool by @batrr in #11072
Remove max reorg check in XDC by @ak88 in #11083
ci: add testing_buildBlockV1 hive tests to known failures by @newmanifold in #11100
ci: bump tests-spec timeout to 20m by @newmanifold in #11109
style: enforce explicit type over var (IDE0008) by @asdacap in #11079
chore: Update Dockerfiles by @core-repository-dispatch-app [bot] in #11114
Update OP Superchain chains by @core-repository-dispatch-app [bot] in #11105
Auto-update fast sync settings by @core-repository-dispatch-app [bot] in #11106
fix: use DbNames constants for discovery store paths by @Keemosty12 in #11108
chore(pgo): update PGO profile by @github-actions [bot] in #11107
fix: add bounds check before unsafe RLP length deserialization by @LukaszRozmej in #11088
style: enforce primary constructors (IDE0290) as build error by @asdacap in #11117
ci: chunk Legacy VM test on ubuntu-latest for coverage by @newmanifold in #11113
feat: add call count limit for trace_callMany by @LukaszRozmej in #11085
feat: Add testing_buildBlockV1 RPC endpoint and make IBlockProducerEnv IAsyncDisposable by @marcindsobczak in #9901
fix: return NoopSnapServer instead of null for HashDB by @asdacap in #11116
eth_getBlockByNumber(“pending”) returns non-null hash, nonce, miner by @svlachakis in #11121
Break pagination in Eth/70 on empty response by @flcl42 in #11129
eth_getBlockByNumber - Remove totalDifficulty by @svlachakis in #11097
chore: Remove debug_getBlockRlp method by @rubo in #11130
style: enforce expression-bodied members by @asdacap in #11134
fix(rpc): strip custom-error revert bytes from eth_call/eth_estimateGas message field by @divi2806 in #11112
Add L1STATICCALL precompile and witness RPC by @jmadibekov in #11017
style: enable CA2208 and fix incorrect exception argument params by @newmanifold in #11131
fix: clean stale flat storage when contract storage becomes empty by @asdacap in #11133
fix: Revise Hive tests by @rubo in #11142
fix: dispose SnappyStream in PayloadByNumberProtocol by @Keemosty12 in #11135
Improve ssz by @flcl42 in #10788
fix: Fix Codecov reports by @rubo in #11144
chore: Update Dockerfiles by @core-repository-dispatch-app [bot] in #11146
fix: Add Codecov config by @rubo in #11145
Patch dependencies by @benaadams in #11149
refactor: remove long range catch-up sync by @asdacap in #11123
fix(test): replace TrieWarmer Task.Delay with polling by @JayeTurn in #11147
fix build - BenchmarkDotNet Version by @svlachakis in #11152
StackUnderflow from JSON-RPC method eth_call by @svlachakis in #11139
fix(sync): restore ActivatedSyncFeed dispose guard by @JayeTurn in #11163
fix: resolve flaky Can_change_branch_on_invalid_block test with event-driven deletion wait by @divi2806 in #11159
XDC Subnet penalties by @batrr in #11137
XDC subnet snapshot manager by @batrr in #10380
fix: cap compact log entry zero-prefix data expansion by @JayeTurn in #11110
fix: restrict health check UI to ports with health module enabled by @LukaszRozmej in #11167
Feature - EIP-4444 EraE Support by @svlachakis in #10812
feat(analyzers): add NETH002 to detect excessively deep lambda indentation by @asdacap in #11138
fix eth_estimategas to execute with available gas and return allowance error for compatiblity with geth by @DarkLord017 in #11153
Enable IDE0320 analyzer for static lambdas by @LukaszRozmej in #11164
Update CODEOWNERS - JsonRpc & Facade by @svlachakis in #11191
ci: bump mainnet Flat sync timeout to 6h in sync-master-validation by @stdevMac in #11195
fix: EIP-8024 missing immediate must decode as zero, not graceful STOP by @LukaszRozmej in #11178
Remove Eip-7907 by @benaadams in #11199
fix(db): make RocksDbReader disposable, unify ReadOptions cleanup by @LukaszRozmej in #11197
Fix amsterdam hive tests by @flcl42 in #11151
Make BaseSnapshotManager disposable by @ak88 in #11198
chore: Change codecov/project status by @rubo in #11227
ZiskGuest: enable stacktrace data to facilitate possible GVM resolution by @maximmenshikov in #11234
ZiskGuest: update bflat to v17.1.0 image (GVM improvements) by @maximmenshikov in #11235
Auto-update fast sync settings by @core-repository-dispatch-app [bot] in #11238
chore(pgo): update PGO profile by @github-actions [bot] in #11239
perf(state): avoid copy on BulkSet via ArrayPoolList ownership transfer by @asdacap in #11240
fix(merge): validate safe/finalized as ancestors of new head by @benaadams in #11187
ci: Auto-run Claude review and gate merges on verdict by @LukaszRozmej in #11150
perf(trie): tune BulkSet parallelism and dispatch for storage-flush workloads by @asdacap in #11241
TransactionResult Extensibility Improvements by @svlachakis in #11243
test(sync): fix flaky StateSyncFeedTests timeout handling by @LukaszRozmej in #11226
Fix flaky tests in PruningScenariosTests by @benaadams in #11248
ci(claude-review): drop concurrency group by @LukaszRozmej in #11251
ci(hive): remove build-block-from-mempool from known failures by @newmanifold in #11250
fix build - BenchmarkDotNet Version by @AnkushinDaniil in #11253
removes MaxFeePerGas for eth_estimateGas by @DarkLord017 in #11192
Refactor DB migrations to use DI by @asdacap in #11242
fix(merge): allow lower finalized FCUs and add Paris engine pyspec coverage by @benaadams in #11259
Remove joc from sync actions by @stdevMac in #11236
chore(zkevm): Remove unnecessary zkEVM conditions by @rubo in #11255
Optimize EvmMemory by @benaadams in #11247
Tell AGENTS versions of C# and .NET by @benaadams in #11272
Break on unknown receipts; ignore unknown blocks by @flcl42 in #11263
Feature/subnet plugin by @ak88 in #11126
Optimize EVM stack by @benaadams in #11230
Break on regular message before status receival by @flcl42 in #11262
Add missing solution dependencies by @flcl42 in #11286
style: enforce additional IDE style rules as warnings by @newmanifold in #11283
eth_call, eth_createAccessList, eth_estimateGas, debug_traceCall, debug_traceCallMany : honour gasCap as default gas, remove block-gas-limit ceiling for RPC calls by @svlachakis in #11282
chore: Update packages by @rubo in #11290
Additional BAL hive tests by @benaadams in #11285
ci(expb): live streaming, SSE metrics, summary reports, and dotTrace profiling by @kamilchodola in #11268
chore: modify the error message to remove inconsistency by @akronim26 in #11288
fix(eth_call): return descriptive error when maxFeePerGas is below block base fee by @divi2806 in #11190
fix(specs): initialize Gnosis and Chiado transition activations by @JayeTurn in #11274
fix(expb): Push and PR triggers by @kamilchodola in #11300
XDC Epoch switch manager by @batrr in #11140
fix(db): wait for in-flight timer callback in DbMetricsUpdater.Dispose by @asdacap in #11270
fix: PatriciaTree commit deadlock on bounded scheduler by @batrr in #11299
Reduce dirty nodes lock contention by @benaadams in #11297
perf: disable ReadyToRun AOT compilation by @kamilchodola in #11289
feat(logging): add DebugError/DebugWarn helpers with Kind property for Seq by @kamilchodola in #11157
Enforce EIP-3675 uncle ban at the spec level by @benaadams in #11302
EIP-7976 — Increase calldata floor cost by @newmanifold in #11293
txpool: add txpool_contentFrom, fix txpool_status hex format, fix txpool_content by @svlachakis in #11305
Feature/subnet block building by @ak88 in #11304
chore: Update Dockerfiles by @core-repository-dispatch-app [bot] in #11295
perf(trie): skip TrieNode wrapping for extension children already unresolved to Hash256 by @asdacap in #11273
fix: use pattern matching in TrieNode.Decoder (IDE0019) by @newmanifold in #11312
Optimize caching & tests for precompiles by @alexb5dh in #11309
Avoid pooled RLP aliasing in read-only trie clones by @benaadams in #11314
HistoryPruner: self-bootstrap in TryPruneHistory instead of relying on SyncServer by @AnkushinDaniil in #11254
Fix Claude review wip-label-removed trigger by @alexb5dh in #11320
Add GetEffectiveInput override to ModExp precompiles by @LukaszRozmej in #11316
fix: skip AuRa finalization startup walk on post-merge chains by @LukaszRozmej in #11306
eth_feeHistory fixes by @svlachakis in #11322
eth_simulateV1 - MovePrecompileToAddress validation (-38022) by @svlachakis in #11326
EIP-7981 — Access list token floor pricing by @newmanifold in #11311
feat: add StateComposition plugin — real-time state metrics with incremental tracking by @AnkushinDaniil in #10995
eth_getRawTransactionByHash fix by @svlachakis in #11336
Bump up the version to 1.38.0-unstable by @core-repository-dispatch-app [bot] in #11330
fix remove balance checks from eth_simulate_v1 by @DarkLord017 in #11332
fix(network): ignore background task cancellation during session shut… by @mk0walsk in #11321
eth estimategas & eth call does not support block overrides by @DarkLord017 in #11267
style: enable nullable for Logging, Config, and leaf packages by @asdacap in #11119
docs(jsonrpc): correct descriptions for proof_getTransactionByHash / proof_getTransactionReceipt by @smartprogrammer93 in #11344
analyzers: NETH003 — file name must match the contained type name by @asdacap in #11337
chore(pgo): update PGO profile by @github-actions [bot] in #11358
Auto-update fast sync settings by @core-repository-dispatch-app [bot] in #11357
ci(hive): split engine-cancun and engine-api into separate runners by @newmanifold in #11365
revert: do not skip balance validation in eth_simulateV1 by @DarkLord017 in #11368
fixes by @svlachakis in #11343
XDC Fix special transaction by @batrr in #11279
chore: Support and migrate to Ubuntu 26.04 by @rubo in #11355
Parallel transaction execution with BALs by @Marchhill in #9182
fix(tracer): guard NativeCallTracer against empty call stack on CREATE transactions by @manusw7 in #11340
Update OP Superchain chains by @core-repository-dispatch-app [bot] in #11364
debug_traceCallMany: strip filler blocks from overrides result by @grubbyTimes in #11348
More optimizations for precompile caching by @alexb5dh in #11373
Allow HistoryPruner to be callable via decorator by @damian-orzechowski in #11098
XDC Fix mutable V2 config spec by @batrr in #11327
refactor: remove NodeData satellite protocol by @asdacap in #11359
Refactor TxPoolInfoProvider for per-sender efficiency, allocation cleanup, and blob coverage by @svlachakis in #11363
perf: eliminate redundant storage tree commits in FlatWorldStateScope by @kamilchodola in #11349
feat(state): persist FlatLayout and refuse mismatched restarts by @asdacap in #11271
test: bump 10s timeouts that flake on Flat DB CI by @LukaszRozmej in #11380
Add opcode tracing plugin by @dmitriy-b in #10038
test(evm): add RIPEMD-160 precompile vectors by @BZO95 in #11378
test: raise NewPayloadBlockProcessingTimeout in merge tests by @LukaszRozmej in #11381
refactor(init): convert ExitOnInvalidBlock and InitDatabase to DI by @asdacap in #11366
Error codes and messages for Geth compatibility by @svlachakis in #11335
fix(bal): skip prestate entries when checking account existence in BAL by @kamilchodola in #11389
fix: remove broken backlog warning in AsyncFileWriteQueue by @kamilchodola in #11386
fix(eth_simulateV1): return spec-compliant error codes and messages for fee cap and insufficient funds by @divi2806 in #11372
Refine runner configs; activate discovery by @flcl42 in #11384
fix(parallel): capture and rethrow worker exceptions in ParallelUnbalancedWork by @benaadams in #11398
fix(test): treat ArrowGlacier and GrayGlacier as pre-merge by @Ahjan1999 in #11315
perf(sync): allow multiple allocation slots per peer (lock-free rewrite) by @LukaszRozmej in #11361
fix(eth_simulateV1): return spec-compliant message for intrinsic gas error (-38013) by @divi2806 in #11397
fix(flat-state): wait for TrieWarmer in-flight jobs before disposing SnapshotBundle by @asdacap in #11394
test: stabilize CI flakes (timeout bumps + log noise) by @LukaszRozmej in #11402
sync: fix beacon headers re-downloaded after #10876 changed GetBlockHashOnMainOrBestDifficultyHash by @asdacap in #11339
test: dispose ECIES buffers on assertion failure by @BZO95 in #11395
feat(merge): add testing_commitBlockV1 to commit a block on the chain head by @AnkushinDaniil in #11385
fix: isSyncing in hoodi by @deffrian in #11410
Upgrade discv5 by @flcl42 in #11419
txpool_content fix by @svlachakis in #11417
fix(prewarm): run speculative prewarming when BAL EIP is not active by @LukaszRozmej in #11432
Fix snap lengths by @flcl42 in #11414
Snapshot fixes by @svlachakis in #11401
IDriveInfo DI improvements by @svlachakis in #11437
chore: Remove NuGet package caching by @svlachakis in #11440
extension methods for ITransactionProcessor by @DarkLord017 in #11393
Feature/subnet seal validator by @ak88 in #11294
XDC: Fix duplicate signature quorum bypass by @alexb5dh in #11379
Optimise parallel execution: reduce worldstate, txprocessor allocations by @Marchhill in #11318
debug_traceCallMany: extend timeout CTS lifetime to enumerator disposal by @LukaszRozmej in #11429
fix: Revise dependency caching by @rubo in #11444
style: enforce expression-bodied operators by @alexb5dh in #11460
fix: misleading “100% Old Headers” and “Unable to find beacon header” logs at fresh sync start by @LukaszRozmej in #11449
style: remove unused usings in Benchmarks solution by @alexb5dh in #11463
Auto-update fast sync settings by @core-repository-dispatch-app [bot] in #11468
XDC - Implement forensics processor by @cicr99 in #11342
XDC Downgrade base protocol by @batrr in #11451
style: enforce null-coalescing operator by @alexb5dh in #11461
refactor: simplify snap+state sync dispatcher by @asdacap in #11102
Fixes for RLP integers and bool decoding by @alexb5dh in #11479
refactor: serialise FinalizeSync via captured per-round pivot by @asdacap in #11477
Fix: /health endpoint reports ClUnavailable after 5 minutes (1.37.x regression) by @svlachakis in #11474
fix(statecomp): serialize empty histograms and run bootstrap on first new head by @AnkushinDaniil in #11382
fix(fastsync): clean flat storage when account is null in VerifyStorageUpdated by @grubbyTimes in #11411
TransactionForRpc improvements by @svlachakis in #11484
Corrected error codes for eth simulate by @DarkLord017 in #11430
Handle quick channel closing by @flcl42 in #11428
test: bump TestBlockchain.DefaultTimeout 10s -> 30s by @LukaszRozmej in #11486
perf: Embed Address bytes inline to remove secondary allocation by @asdacap in #11469
fix gas calculation in access list by @DarkLord017 in #11390
More RLP limits, sizes, and positions checks by @alexb5dh in #11488
Enforce 256-block lookback on L1SLOAD and L1STATICCALL by @jmadibekov in #11275
RPC: admin_* peer-management endpoints improvements by @svlachakis in #11489
Taiko Unzen hardfork implemented by @Gohnnyman in #11281
chore: Update dependencies (#11512) by @damian-orzechowski in #11580
eth/71 by @flcl42 in #10844
Improve eth/70 checks by @flcl42 in #11456
fix(eth/70): reject null receipt payloads by @BZO95 in #11615
RLP tx decoding fixes by @alexb5dh in #11496
Default Discovery to V4 by @benaadams in #11614
Activate BAL only when needed by @flcl42 in #11795
Fix shutdown race in SnapProvider PLINQ (closes #11806) by @stdevMac in #11807
Add new default for gnosis and gnosis archive config by @stdevMac in #11269
feat: add SkipMetricsTracking property to DbSettings by @cbermudez97 in #11515
Make EraE tests visible and green by @flcl42 in #11727
Alchemy - Code Fix by @svlachakis in #11714

New Contributors

@kevaundray made their first contribution in #10794
@kseniaeremekno made their first contribution in #10865
@Giri-Aayush made their first contribution in #10856
@Ocheretovich made their first contribution in #11029
@akronim26 made their first contribution in #11288
@mk0walsk made their first contribution in #11321

Full Changelog: https://github.com/NethermindEth/nethermind/compare/1.37.2…1.38.0

Build signatures

The packages are signed with the following OpenPGP key: AD12 7976 5093 C675 9CD8 A400 24A7 7461 6F1E 617E

NethermindEth/nethermind 1.38.0 v1.38.0 on GitHub