Scheduled maintenance is currently in progress. We will provide updates as necessary.
Posted Feb 25, 2026 - 14:00 UTC
Scheduled
In preparation for the Lisoo/LisovoPro hardfork at block 83756500, we will be upgrading our Polygon nodes.
There are no explicit API method format/signature changes called out for this upgrade.
However, there are a few API-relevant things to be aware of: Bug fixes affecting RPC behavior:
- `eth_simulateV1` - had a crash bug that is now fixed (two separate fixes: one for the method handler, one in consensus/misc/eip4844). If you were working around crashes, behavior may normalize.
- State-sync transactions in tracers - eth_tracers now correctly includes state-sync txs in traces post-Madhugiri HF. If you rely on trace results, output may change for those transactions.
Consensus/fee changes that could affect responses:
- Dynamic EIP-1559 parameters — base fee calculation parameters are now dynamic. This could affect `eth_gasPrice`, `eth_feeHistory`, and related fee estimation calls.
- P256 precompile gas cost update — calls to the P256 precompile (RIP-7212) will now use updated gas costs, affecting gas estimation for transactions using it.
- PIP-82 / BurntContract changes — changes to how fees are burned; shouldn't change API formats but could affect balance/accounting queries.
New opcode:
- CLZ opcode added — relevant if you're doing gas estimation for contracts that use it. The short answer: no breaking changes to API method names or response schemas are documented. The main things to watch are fee estimation behavior (dynamic EIP-1559 params) and tracer output for state-sync transactions. The hardfork hits Mainnet at block 83756500, around 2 PM UTC on March 4, 2026.