Drop kcrypt, use sdk (#120)

cmd/discovery/main.go

@@ -5,12 +5,13 @@ import (
 	"os"
 
 	"github.com/kairos-io/kairos-challenger/cmd/discovery/client"
-	"github.com/kairos-io/kcrypt/pkg/bus"
+	"github.com/kairos-io/kairos-sdk/kcrypt/bus"
 	"github.com/kairos-io/tpm-helpers"
+	"github.com/mudler/go-pluggable"
 )
 
 func main() {
-	if len(os.Args) >= 2 && bus.IsEventDefined(os.Args[1]) {
+	if len(os.Args) >= 2 && isEventDefined(os.Args[1]) {
 		c, err := client.NewClient()
 		checkErr(err)
 		checkErr(c.Start())
@@ -28,3 +29,25 @@ func checkErr(err error) {
 		os.Exit(1)
 	}
 }
+
+// isEventDefined checks whether an event is defined in the bus.
+// It accepts strings or EventType, returns a boolean indicating that
+// the event was defined among the events emitted by the bus.
+func isEventDefined(i interface{}) bool {
+	checkEvent := func(e pluggable.EventType) bool {
+		if e == bus.EventDiscoveryPassword {
+			return true
+		}
+
+		return false
+	}
+
+	switch f := i.(type) {
+	case string:
+		return checkEvent(pluggable.EventType(f))
+	case pluggable.EventType:
+		return checkEvent(f)
+	default:
+		return false
+	}
+}