Bor v2.6.0 and Erigon v3.4.0 for Mainnet and Amoy

deepanshu25R · February 19, 2026, 2:55pm

Hi all, we have released new stable versions of PoS clients for the upcoming Lisovo/LisovoPro HF on Mainnet.

The hardfork will happen on block 83756500, at around 2 PM UTC, March 4th, 2026.

Bor

Bor v2.6.0 release defines the upcoming Lisovo/LisovoPro hardfork, includes performance improvements, and upstream updates from go-ethereum.

The Mainnet Lisovo/LisovoPro Hardfork will happen on block 83756500, at around 2 PM UTC, March 4th, 2026.

The changes included in this HF are:

CLZ Opcode Support
P256 Gas Cost Updates

With regards to upstream updates, we are rolling out changes up to go-ethereum v1.16.8

Other major changes include:

Security fixes
Go bump
Bugs fixes
Implementation of PIP-82 (changes in BurntContract)
Peer Consensus-Based Witness Verification (#1766)
Dynamic EIP-1559 Parameters (#1989)
Transaction Rebroadcast Mechanism (#1992, #2028, #2037)
Validator Set Overrides (#1958)
Witness Memory Cache (#1962)
Block Production Metrics (#1991)
Late Block Build Time (#1963)
Pruner Reorg Handling (#1916)
Race Condition Fixes (#1946)
Witness Protocol Concurrency Fix (#2023)

Also, the release includes minor bug fixes (crash in eth_simulateV1, stateless mode stability, state-sync support for the tracer, …), more tests, and improvements to code quality.

What’s Changed

eth/protocols/wit: made protocol version consistent by @pratikspatil024 in https://github.com/0xPolygon/bor/pull/1940
chore: fix function name in comment and correct spelling error in config.go by @findfluctuate in https://github.com/0xPolygon/bor/pull/1956
chore: remove repetitive word in comment by @liuyueyangxmu in https://github.com/0xPolygon/bor/pull/1909
core/txpool: added nil checks to prevent crash in stateless mode by @pratikspatil024 in https://github.com/0xPolygon/bor/pull/1961
Enforce patch code coverage by @cffls in https://github.com/0xPolygon/bor/pull/1964
backport v2.5.6 into develop by @pratikspatil024 in https://github.com/0xPolygon/bor/pull/1971
core, eth: added LRU memory cache to save witnesses in memory by @pratikspatil024 in https://github.com/0xPolygon/bor/pull/1962
consensus/bor: ensure late blocks have sufficient build time by @cffls in https://github.com/0xPolygon/bor/pull/1963
backport v2.5.7 by @pratikspatil024 in https://github.com/0xPolygon/bor/pull/1985
Return nil from heimdall mock on milestone/checkpoint by @cffls in https://github.com/0xPolygon/bor/pull/1988
fix randomly failing TestCalcBaseFeeDelhi by @cffls in https://github.com/0xPolygon/bor/pull/1987
Increase veblop timeout to 8 seconds by @cffls in https://github.com/0xPolygon/bor/pull/1986
fix(rpc): eth_simulateV1 method handler crash by @ChanHongMing in https://github.com/0xPolygon/bor/pull/1955
BP Metrics by @lucca30 in https://github.com/0xPolygon/bor/pull/1991
txpool: add stuck transaction rebroadcast mechanism by @cffls in https://github.com/0xPolygon/bor/pull/1992
fix: add bor hfs to description and readheadertimeout in config by @kamuikatsurgi in https://github.com/0xPolygon/bor/pull/2003
init: CLAUDE.md file by @kamuikatsurgi in https://github.com/0xPolygon/bor/pull/2000
consensus/eip1559: add missing bhilai HF tests by @manav2401 in https://github.com/0xPolygon/bor/pull/1990
Validator Set Overrides on Config by @lucca30 in https://github.com/0xPolygon/bor/pull/1958
Add Claude Assistant Workflows by @adamdossa in https://github.com/0xPolygon/bor/pull/2006
bind, params: fix bind/v2 tests and warn about invalid config/flag by @kamuikatsurgi in https://github.com/0xPolygon/bor/pull/2007
Switch to GCR for our CI / CD instead of Docker Hub by @adamdossa in https://github.com/0xPolygon/bor/pull/2011
fix(ci): use custom kurtosis branch by @kamuikatsurgi in https://github.com/0xPolygon/bor/pull/2012
eth: implemented peer consensus based witness verification by @pratikspatil024 in https://github.com/0xPolygon/bor/pull/1766
Various improvements by @marcello33 in https://github.com/0xPolygon/bor/pull/1950
ci: load kurtosis images from gcr instead of docker hub by @leovct in https://github.com/0xPolygon/bor/pull/2014
Dynamic EIP-1559 params setup by @lucca30 in https://github.com/0xPolygon/bor/pull/1989
Test validator’s ability to rewind upon span rotation by @cffls in https://github.com/0xPolygon/bor/pull/1960
geth upstream v1.16.7 by @Raneet10 in https://github.com/0xPolygon/bor/pull/1974
eth/tracers: include state sync tx in traces post-Madhugiri by @kamuikatsurgi in https://github.com/0xPolygon/bor/pull/2010
eth: fix concurrent map writes panic in witness protocol by @cffls in https://github.com/0xPolygon/bor/pull/2023
backport v2.5.8 by @pratikspatil024 in https://github.com/0xPolygon/bor/pull/2025
upstream v1.16.8 by @pratikspatil024 in https://github.com/0xPolygon/bor/pull/2024
fix(api): tracers tests for state-sync tx by @kamuikatsurgi in https://github.com/0xPolygon/bor/pull/2026
Updating enodes for mainnet and amoy by @sanketsaagar in https://github.com/0xPolygon/bor/pull/2021
pruner: covering reorg scenarios by @lucca30 in https://github.com/0xPolygon/bor/pull/1916
geth upstream v1.16.4 by @marcello33 in https://github.com/0xPolygon/bor/pull/1839
Enable rebroadcast by default by @cffls in https://github.com/0xPolygon/bor/pull/2028
Fix race conditions detected in make test-race by @cffls in https://github.com/0xPolygon/bor/pull/2027
revert: P256VerifyGas to 3450 by @kamuikatsurgi in https://github.com/0xPolygon/bor/pull/2030
fix(ci): test-state-sync by @kamuikatsurgi in https://github.com/0xPolygon/bor/pull/2032
Enable rebroadcast by default by @cffls in https://github.com/0xPolygon/bor/pull/2037
Install polycli in kurtosis e2e by @cffls in https://github.com/0xPolygon/bor/pull/2036
lisovo: CLZ opcode and P256 gas cost changes by @kamuikatsurgi in https://github.com/0xPolygon/bor/pull/2040
consensus/misc/eip4844: small update to fix simulatev1 crash by @pratikspatil024 in https://github.com/0xPolygon/bor/pull/2054
core, internal, params: lisovoPro HF and version bump by @marcello33 in https://github.com/0xPolygon/bor/pull/2055
consensus/bor: fix goroutine leak in runMilestoneFetcher when Heimdall is unreachable by @cffls in https://github.com/0xPolygon/bor/pull/2056
fix(shutdown): cancel in-flight Heimdall queries on engine shutdown by @kamuikatsurgi in https://github.com/0xPolygon/bor/pull/2058
consensus/bor: fix sub-second late block detection producing empty blocks by @cffls in https://github.com/0xPolygon/bor/pull/2060
fix(core): cap verifyPendingHeaders to prevent OOM from unbounded header reads by @kamuikatsurgi in https://github.com/0xPolygon/bor/pull/2057
builder, internal, params: pip-82 and lisovo HF in mainnet by @marcello33 in https://github.com/0xPolygon/bor/pull/2064
v2.6.0 by @marcello33 in https://github.com/0xPolygon/bor/pull/2065
core/stateless: fix witness RLP backward compat with WIT/0 peers by @cffls in #2068

New Contributors

@findfluctuate made their first contribution in https://github.com/0xPolygon/bor/pull/1956
@liuyueyangxmu made their first contribution in https://github.com/0xPolygon/bor/pull/1909
@ChanHongMing made their first contribution in https://github.com/0xPolygon/bor/pull/1955

Full Changelog: https://github.com/0xPolygon/bor/compare/v2.5.9…v2.6.0

Steps for upgrading Bor node

Stop bor service
```
sudo service bor stop
```

Install Bor with a version tag, network name (mainnet/amoy), and node type (sentry, validator, or archive).

# Replace the node type
curl -L https://raw.githubusercontent.com/0xpolygon/install/main/bor.sh | bash -s -- v2.6.0 <network> <node_type>

Check bor version

/usr/bin/bor version

# It should print 
# v2.6.0

Restart bor service
```
sudo service bor start
```

Erigon

The corresponding Erigon version (ready for the Mainnet LisovoPro HF) is Erigon v3.4.0

Docker Images

You can find the latest docker images here:

Bor: https://hub.docker.com/r/0xpolygon/bor/tags

Erigon: https://hub.docker.com/r/0xpolygon/erigon/tags

Thanks,

Polygon Team