feat(beacon): change the reorg log level (#350)

* use debug log level to avoid logging too many logs when frequently soft block reorg.

* use debug log level to avoid logging too many logs when frequently soft block reorg.

* feat: check --taiko flag

---------

Co-authored-by: David <david@taiko.xyz>

core/blockchain.go

@@ -2269,7 +2269,12 @@ func (bc *BlockChain) reorg(oldHead *types.Header, newHead *types.Block) error {
 	} else {
 		// len(newChain) == 0 && len(oldChain) > 0
 		// rewind the canonical chain to a lower point.
-		log.Error("Impossible reorg, please file an issue", "oldnum", oldBlock.Number(), "oldhash", oldBlock.Hash(), "oldblocks", len(oldChain), "newnum", newBlock.Number(), "newhash", newBlock.Hash(), "newblocks", len(newChain))
+		// CHANGE(taiko): use debug log level to avoid logging too many logs when frequently soft block rollback.
+		if bc.chainConfig.Taiko {
+			log.Debug("Impossible reorg, please file an issue", "oldnum", oldBlock.Number(), "oldhash", oldBlock.Hash(), "oldblocks", len(oldChain), "newnum", newBlock.Number(), "newhash", newBlock.Hash(), "newblocks", len(newChain))
+		} else {
+			log.Error("Impossible reorg, please file an issue", "oldnum", oldBlock.Number(), "oldhash", oldBlock.Hash(), "oldblocks", len(oldChain), "newnum", newBlock.Number(), "newhash", newBlock.Hash(), "newblocks", len(newChain))
+		}
 	}
 	// Acquire the tx-lookup lock before mutation. This step is essential
 	// as the txlookups should be changed atomically, and all subsequent