eth/downloader, core/types: take withdrawals-size into account in downloader queue (#30276)

Fixes a slight miscalculation in the downloader queue, which was not accurately taking block withdrawals into account when calculating the size of the items in the queue

core/types/withdrawal.go

@@ -18,6 +18,7 @@ package types
 
 import (
 	"bytes"
+	"reflect"
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/hexutil"
@@ -48,6 +49,12 @@ type Withdrawals []*Withdrawal
 // Len returns the length of s.
 func (s Withdrawals) Len() int { return len(s) }
 
+var withdrawalSize = int(reflect.TypeOf(Withdrawal{}).Size())
+
+func (s Withdrawals) Size() int {
+	return withdrawalSize * len(s)
+}
+
 // EncodeIndex encodes the i'th withdrawal to w. Note that this does not check for errors
 // because we assume that *Withdrawal will only ever contain valid withdrawals that were either
 // constructed by decoding or via public API in this package.

eth/downloader/queue.go

@@ -385,6 +385,7 @@ func (q *queue) Results(block bool) []*fetchResult {
 		for _, tx := range result.Transactions {
 			size += common.StorageSize(tx.Size())
 		}
+		size += common.StorageSize(result.Withdrawals.Size())
 		q.resultSize = common.StorageSize(blockCacheSizeWeight)*size +
 			(1-common.StorageSize(blockCacheSizeWeight))*q.resultSize
 	}