package server import ( "encoding/json" "net/http" ) type apiError struct { Code string `json:"code"` Message string `json:"message"` } type errorEnvelope struct { Error apiError `json:"error"` } func writeError(w http.ResponseWriter, status int, code string, message string) { writeJSON(w, status, errorEnvelope{ Error: apiError{ Code: code, Message: message, }, }) } func writeJSON(w http.ResponseWriter, status int, value any) { w.Header().Set("Content-Type", "application/json; charset=utf-8") w.WriteHeader(status) _ = json.NewEncoder(w).Encode(value) }