We are upgrading our Polygon Mainnet infrastructure to Bor v2.10.2 on 2026-10-06. This release brings WIT2 witness propagation, pipelined state root computation, sequence store and preconfirmation support, and p2p, sync, and RPC hardening fixes. No hardfork, no database schema change, or resync is required. Brief interruptions to RPC availability may occur on that date.
RPC Changes: - eth_sendRawTransactionForPreconf — New RPC method to submit transactions for preconfirmation (requires `[sequencer] enabled = true` to function). - bor_getPreconfTransactionReceipt — New RPC method to retrieve receipts for preconfirmed transactions. - bor_getInvalidPreconfBlocks — New RPC method to query invalid preconfirmation blocks. - eth_sendRawTransactionSync — Now respects `rpc.txsync.maxconcurrent` configuration to cap concurrent calls waiting for a receipt (default 4096; 0 = no limit).