feat(taiko-client): add more double-checks in isKnownCanonicalBlock (#19473)

Co-authored-by: Copilot <[email protected]>

Author: davidtaikocha

packages/taiko-client/driver/chain_syncer/event/blocks_inserter/common.go

@@ -334,6 +334,64 @@ func isKnownCanonicalBlock(
 			txListHash.Hex(),
 		)
 	}
+	defer func() {
+		if err != nil {
+			log.Warn("Invalid known block", "blockID", blockID, "coinbase", block.Coinbase(), "reason", err)
+		}
+	}()
+
+	if block.ParentHash() != meta.Parent.Hash() {
+		err = fmt.Errorf("parent hash mismatch: %s != %s", block.ParentHash(), meta.Parent.Hash())
+		return nil, err
+	}
+	if block.Transactions().Len() == 0 {
+		err = errors.New("transactions list is empty")
+		return nil, err
+	}
+	if block.Transactions()[0].Hash() != anchorTx.Hash() {
+		err = fmt.Errorf("anchor transaction mismatch: %s != %s", block.Transactions()[0].Hash(), anchorTx.Hash())
+		return nil, err
+	}
+	if block.UncleHash() != types.EmptyUncleHash {
+		err = fmt.Errorf("uncle hash mismatch: %s != %s", block.UncleHash(), types.EmptyUncleHash)
+		return nil, err
+	}
+	if block.Coinbase() != meta.SuggestedFeeRecipient {
+		err = fmt.Errorf("coinbase mismatch: %s != %s", block.Coinbase(), meta.SuggestedFeeRecipient)
+		return nil, err
+	}
+	if block.Difficulty().Cmp(common.Big0) != 0 {
+		err = fmt.Errorf("difficulty mismatch: %s != 0", block.Difficulty())
+		return nil, err
+	}
+	if block.MixDigest() != meta.Difficulty {
+		err = fmt.Errorf("mixDigest mismatch: %s != %s", block.MixDigest(), meta.Difficulty)
+		return nil, err
+	}
+	if block.Number().Uint64() != meta.BlockID.Uint64() {
+		err = fmt.Errorf("block number mismatch: %d != %d", block.Number(), meta.BlockID)
+		return nil, err
+	}
+	if block.GasLimit() != meta.GasLimit+consensus.AnchorV3GasLimit {
+		err = fmt.Errorf("gas limit mismatch: %d != %d", block.GasLimit(), meta.GasLimit+consensus.AnchorV3GasLimit)
+		return nil, err
+	}
+	if block.Time() != meta.Timestamp {
+		err = fmt.Errorf("timestamp mismatch: %d != %d", block.Time(), meta.Timestamp)
+		return nil, err
+	}
+	if !bytes.Equal(block.Extra(), meta.ExtraData) {
+		err = fmt.Errorf("extra data mismatch: %s != %s", block.Extra(), meta.ExtraData)
+		return nil, err
+	}
+	if block.BaseFee().Cmp(meta.BaseFee) != 0 {
+		err = fmt.Errorf("base fee mismatch: %s != %s", block.BaseFee(), meta.BaseFee)
+		return nil, err
+	}
+	if block.Withdrawals().Len() != 0 {
+		err = fmt.Errorf("withdrawals mismatch: %d != 0", block.Withdrawals().Len())
+		return nil, err
+	}
 
 	return block.Header(), nil
 }