added missing helpers

app/apptesting/events.go

 package apptesting
 
-import sdk "github.com/cosmos/cosmos-sdk/types"
+import (
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	"golang.org/x/exp/slices"
+)
 
 // AssertEventEmitted asserts that ctx's event manager has emitted the given number of events
 // of the given type.
@@ -15,3 +18,16 @@ func (s *KeeperTestHelper) AssertEventEmitted(ctx sdk.Context, eventTypeExpected
 	}
 	s.Equal(numEventsExpected, len(actualEvents))
 }
+
+func (s *KeeperTestHelper) FindEvent(events []sdk.Event, name string) sdk.Event {
+	index := slices.IndexFunc(events, func(e sdk.Event) bool { return e.Type == name })
+	return events[index]
+}
+
+func (s *KeeperTestHelper) ExtractAttributes(event sdk.Event) map[string]string {
+	attrs := make(map[string]string)
+	for _, a := range event.Attributes {
+		attrs[string(a.Key)] = string(a.Value)
+	}
+	return attrs
+}