core/types: improve LogForStorage and ReceiptForStorage comments (#25032)

Co-authored-by: Felix Lange <fjl@twurst.com>

core/types/log.go

@@ -98,8 +98,8 @@ func (l *Log) DecodeRLP(s *rlp.Stream) error {
 	return err
 }
 
-// LogForStorage is a wrapper around a Log that flattens and parses the entire content of
-// a log including non-consensus fields.
+// LogForStorage is a wrapper around a Log that handles
+// backward compatibility with prior storage formats.
 type LogForStorage Log
 
 // EncodeRLP implements rlp.Encoder.

core/types/receipt.go

@@ -267,8 +267,8 @@ func (r *Receipt) Size() common.StorageSize {
 	return size
 }
 
-// ReceiptForStorage is a wrapper around a Receipt that flattens and parses the
-// entire content of a receipt, as opposed to only the consensus fields originally.
+// ReceiptForStorage is a wrapper around a Receipt with RLP serialization
+// that omits the Bloom field and deserialization that re-computes it.
 type ReceiptForStorage Receipt
 
 // EncodeRLP implements rlp.Encoder, and flattens all content fields of a receipt