enums

use serde::{Deserialize, Serialize};

#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
pub struct CancelReason {
    pub reason: String,
    pub feedback: Option<String>,

use serde::Serialize;
use serde_json::Value;

#[derive(Debug, Clone, Serialize)]
#[serde(tag = "kind", rename_all = "lowercase")]
pub enum ChangeKind {

use std::fmt;

#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum OrderState {
    Pending,
    Paid,

#[derive(Debug, Clone)]
pub enum Outcome {
    Approve,
    Review,
    Reject(String),
}