backport: implement the ADR 075 /events method (#7965) (#9497)

* rpc: implement the ADR 075 /events method (#7965)

This method implements the eventlog extension interface to expose ABCI metadata
to the log for query processing. Only the types that have ABCI events need to
implement this.

- Add an event log to the environment
- Add a sketch of the handler method
- Add an /events RPCFunc to the route map
- Implement query logic
- Subscribe to pubsub if confingured, handle termination

* add MatchesEvents test

* add TODO due to backport sequence

Co-authored-by: M. J. Fromberger <fromberger@interchain.io>

libs/pubsub/query/query.go

@@ -95,6 +95,13 @@ func (q *Query) Matches(events map[string][]string) (bool, error) {
 	return q.matchesEvents(ExpandEvents(events)), nil
 }
 
+func (q *Query) MatchesEvents(events []types.Event) (bool, error) {
+	if q == nil {
+		return true, nil
+	}
+	return q.matchesEvents(events), nil
+}
+
 // String matches part of the pubsub.Query interface.
 func (q *Query) String() string {
 	if q == nil {

libs/pubsub/query/query_test.go

@@ -332,6 +332,16 @@ func TestCompiledMatches(t *testing.T) {
 				t.Errorf("Query: %#q\nInput: %+v\nMatches: got %v, want %v",
 					tc.s, tc.events, got, tc.matches)
 			}
+
+			got, err = c.MatchesEvents(query.ExpandEvents(tc.events))
+			if err != nil {
+				t.Errorf("Query: %#q\nInput: %+v\nMatches: got error %v",
+					tc.s, tc.events, err)
+			}
+			if got != tc.matches {
+				t.Errorf("Query: %#q\nInput: %+v\nMatches: got %v, want %v",
+					tc.s, tc.events, got, tc.matches)
+			}
 		})
 	}
 }