+// SortByHeight implements sort.Interface for AnnotatedTx slices
+type SortByHeight []*query.AnnotatedTx
+
+func (a SortByHeight) Len() int { return len(a) }
+func (a SortByHeight) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
+func (a SortByHeight) Less(i, j int) bool { return a[i].BlockHeight > a[j].BlockHeight }
+