Added clarification comments

state/indexer/block/kv/util.go

@@ -142,6 +142,10 @@ func lookForHeight(conditions []query.Condition) (int64, bool, int) {
 	return 0, false, -1
 }
 
+// Remove all occurrences of height equality queries except one. While we are traversing the conditions, check whether the only condition in
+// addition to match events is the height equality or height range query. At the same time, if we do have a height range condition
+// ignore the height equality condition. If a height equality exists, place the condition index in the query and the desired height
+// into the heightInfo struct
 func dedupHeight(conditions []query.Condition) (dedupConditions []query.Condition, heightInfo HeightInfo, found bool) {
 	heightInfo.heightEqIdx = -1
 	heightRangeExists := false

state/indexer/query_range.go

@@ -77,7 +77,8 @@ func (qr QueryRange) UpperBoundValue() interface{} {
 }
 
 // LookForRanges returns a mapping of QueryRanges and the matching indexes in
-// the provided query conditions.
+// the provided query conditions. If we are matching attributes within events
+// we need to remember the height range from the condition
 func LookForRanges(conditions []query.Condition) (ranges QueryRanges, indexes []int, heightRange QueryRange) {
 	ranges = make(QueryRanges)
 	for i, c := range conditions {