[!WARNING] For node operators that run Base Reth Nodes with Flashblocks enabled this is a mandatory change and must be deployed by 6th February for both Base Sepolia and Base Mainnet.

New RPCs

[!NOTE] These features are only supported in Base Reth

• base_transactionStatus - lookup whether a transaction is present in the mempool
• eth_subscribe - updated to support Flashblocks * pendingLogs: stream of logs from transactions in Flashblocks * newFlashblockTransactions: stream of transaction hashes that are included in the block * newFlashblocks: stream the pending block as new Flashblocks arrive

Other Changes

• Base Reth
  • Flashblock bug fixes and performance improvements
• Nethermind, Geth
  • No changes

Full Changelog: https://github.com/base/node/compare/v0.14.3...v0.14.4