package biz

import "errors"

var (
	// ErrOrderNotFound 订单未找到错误
	ErrOrderNotFound = errors.New("order not found")
	
	// ErrSessionNotFound 会话未找到错误
	ErrSessionNotFound = errors.New("session not found")
	
	// ErrInvalidMessage 无效消息错误
	ErrInvalidMessage = errors.New("invalid message")
	
	// ErrKnowledgeNotFound 知识库文档未找到错误
	ErrKnowledgeNotFound = errors.New("knowledge document not found")
	
	// ErrUploadFailed 文件上传失败错误
	ErrUploadFailed = errors.New("file upload failed")
	
	// ErrServiceUnavailable 服务不可用错误
	ErrServiceUnavailable = errors.New("service unavailable")
)