all: clean up and proerly abstract database access

les/odr_requests.go

@@ -558,7 +558,7 @@ func (r *BloomRequest) Validate(db ethdb.Database, msg *Msg) error {
 // readTraceDB stores the keys of database reads. We use this to check that received node
 // sets contain only the trie nodes necessary to make proofs pass.
 type readTraceDB struct {
-	db    trie.DatabaseReader
+	db    ethdb.Reader
 	reads map[string]struct{}
 }