@@ -18,7 +18,7 @@ message string
 	cause   error
 }
 
-func (e *httpError) Error() string {
+func (e httpError) Error() string {
 	if e.message == "" {
 		e.message = http.StatusText(e.code)
 	}
@@ -26,11 +26,11 @@
 	return fmt.Sprintf("%d %s", e.code, e.message)
 }
 
-func (e *httpError) StatusCode() int {
+func (e httpError) StatusCode() int {
 	return e.code
 }
 
-func (e *httpError) Message() string {
+func (e httpError) Message() string {
 	if e.message == "" {
 		e.message = http.StatusText(e.code)
 	}
@@ -38,53 +38,21 @@
 	return e.message
 }
 
-func (e *httpError) Unwrap() error {
+func (e httpError) Unwrap() error {
 	return e.cause
 }
 
-func NewError(code int, message string, cause error) Error {
-	return &httpError{
+func NewError(message string, code int) httpError {
+	return httpError{
 		code:    code,
 		message: message,
-		cause:   cause,
 	}
 }
 
-func NotFound(message string) Error {
-	return &httpError{
-		code:    http.StatusNotFound,
-		message: message,
-	}
-}
-
-func BadRequest(message string, cause error) Error {
-	return &httpError{
-		code:    http.StatusBadRequest,
-		message: message,
-		cause:   cause,
-	}
-}
-
-func InternalServerError(message string, cause error) Error {
-	return &httpError{
-		code:    http.StatusInternalServerError,
-		message: message,
-		cause:   cause,
-	}
-}
-
-func Unauthorized(message string, cause error) Error {
-	return &httpError{
-		code:    http.StatusUnauthorized,
-		message: message,
-		cause:   cause,
-	}
-}
-
-func Forbidden(message string, cause error) Error {
-	return &httpError{
-		code:    http.StatusForbidden,
-		message: message,
+func (e httpError) WithCause(cause error) Error {
+	return httpError{
+		code:    e.code,
+		message: e.message,
 		cause:   cause,
 	}
 }