feat: v0.4.0 simplify

entity.go

@@ -5,30 +5,11 @@ import (
 	"time"
 )
 
-type Status uint8
-
-const (
-	StatusUnknown Status = iota
-	StatusOK
-	StatusDown
-)
-
-func (s Status) String() string {
-	switch s {
-	case StatusOK:
-		return "OK"
-	case StatusDown:
-		return "DOWN"
-	default:
-		return "UNKNOWN"
-	}
-}
-
 // CheckFunc is a function that does the actual work.
 // This package provides a number of check functions but
 // any function matching the signature may be provided.
 // It must obey context dealine and cancellation.
-type CheckFunc func(context.Context) (Status, error)
+type CheckFunc func(context.Context) error
 
 // Check represents a check that must be run by Watchdog.
 type Check struct {
@@ -38,7 +19,6 @@ type Check struct {
 }
 
 type CheckResult struct {
-	Name   string // identifier of check
-	Status Status // status as retuned by CheckFunc
-	Error  error  // error returned by CheckFunc
+	Name  string // identifier of check
+	Error error  // error returned by CheckFunc
 }