openapi: 3.0.3
info:
  title: 海外客户下单预估资金校验
  version: 1.0.0
  description: Finance异步冻结成功后才能创建客户采购/本土卡车订单。余额优先、授信补足及不足判断由Finance原子执行；本服务不自行修改钱包。创建订单须使用相同幂等键、金额及币种。未绑定预占15分钟过期；订单终态释放，释放失败重试。预占独立于最终人工费用结算。
security:
  - bearerAuth: []
paths:
  /api/merchant/v1/last-leg/order-budgets/{kind}/{key}:
    parameters:
      - {name: kind, in: path, required: true, schema: {type: string, enum: [procurement, trucking]}}
      - {name: key, in: path, required: true, schema: {type: string, minLength: 1, maxLength: 128}}
    post:
      summary: 发起冻结或读取原请求，失败后可用原键重试
      description: 客户身份仅来自认证。procurement需要merchant:cross-border:procurement:create，trucking需要merchant:cross-border:domestic-trucking:create；权限不能交叉使用。采购金额是预算单价乘采购数量，免费样品零金额不发资金指令；卡车金额必须大于0。重试禁止更改金额或币种。
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required: [amount, currency]
              properties:
                amount: {type: number, minimum: 0, multipleOf: 0.01}
                currency: {type: string, enum: [CNY, USD]}
      responses:
        '200': {$ref: '#/components/responses/Result'}
        '403': {description: 身份或业务创建权限不足}
    get:
      summary: 读取当前客户本次下单的权威资金回执
      description: 与POST相同创建权限；只有usable=true才允许继续下单。FREEZE_PENDING处理期间应轮询，超时保留原键重试；失败显示Finance返回原因。
      responses:
        '200': {$ref: '#/components/responses/Result'}
        '403': {description: 身份或业务创建权限不足}
components:
  securitySchemes:
    bearerAuth: {type: http, scheme: bearer, bearerFormat: JWT}
  responses:
    Result:
      description: 统一业务响应；code为字符串200表示查询或发起成功，不等于资金冻结成功。
      content:
        application/json:
          schema:
            type: object
            properties:
              code: {type: string}
              message: {type: string}
              data:
                type: object
                required: [status, amountCny, message, usable]
                properties:
                  status: {type: string, enum: [FREEZE_PENDING, FROZEN, FAILED, RELEASE_PENDING, RELEASE_FAILED, RELEASED]}
                  amountCny: {type: number, minimum: 0}
                  message: {type: string}
                  orderNo: {type: string, nullable: true}
                  usable: {type: boolean}