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// cashier_page.go submit.php 直出的自包含收银台页（不 302、不依赖前端 SPA），
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// 二维码由服务端生成 PNG data URL；状态经 /cashier-status 轮询。
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package service
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import (
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"bytes"
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"context"
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"encoding/base64"
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"html/template"
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"strings"
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"github.com/cyi-cc/fun"
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"github.com/skip2/go-qrcode"
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"github.com/cyi-cc/cyi-box/backend/internal/db"
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"github.com/cyi-cc/cyi-box/backend/internal/store"
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)
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// cashierTmpl 收银台页面模板（新粗野主义风格，与前端 Cashier.vue 一致）。
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var cashierTmpl = template.Must(template.New("cashier").Parse(`<!DOCTYPE html>
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<html lang="zh-CN">
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width,initial-scale=1">
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<meta name="referrer" content="never">
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<title>收银台 · ¥{{.Money}}</title>
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<style>
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:root{--ink:#1c1b1a;--cream:#f7f4ec;--cream2:#e5e0d5;--ink3:#8a8577;--blue:#1677ff;--green:#18a058}
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*{box-sizing:border-box;margin:0;padding:0}
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body{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--cream);padding:20px;font-family:-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink)}
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.box{width:380px;max-width:100%;background:#fff;border:3px solid var(--ink);border-radius:20px;padding:28px;text-align:center;box-shadow:6px 6px 0 var(--ink)}
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.head{border-bottom:2px dashed var(--cream2);padding-bottom:14px;margin-bottom:16px}
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.logo{font-size:20px;font-weight:900}
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.orderno{font-size:11px;color:var(--ink3);font-family:Consolas,monospace;margin-top:4px;word-break:break-all}
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.subject{font-size:14px;font-weight:700}
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.amount{font-size:40px;font-weight:900;font-family:Consolas,monospace;margin:8px 0 18px}
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.amount .cny{font-size:22px;vertical-align:6px;margin-right:2px}
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.qr-area{display:flex;flex-direction:column;align-items:center;gap:14px}
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.qr-frame{position:relative;padding:14px;background:#fff;border:3px solid var(--ink);border-radius:16px;box-shadow:5px 5px 0 var(--ink)}
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.qr-frame img{display:block;width:240px;height:240px;border-radius:8px}
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.qr-empty{width:240px;height:240px;display:flex;align-items:center;justify-content:center;color:var(--ink3);font-size:13px}
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.corner{position:absolute;width:18px;height:18px;border:3px solid var(--blue)}
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.tl{top:-6px;left:-6px;border-right:0;border-bottom:0;border-radius:8px 0 0 0}
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.tr{top:-6px;right:-6px;border-left:0;border-bottom:0;border-radius:0 8px 0 0}
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.bl{bottom:-6px;left:-6px;border-right:0;border-top:0;border-radius:0 0 0 8px}
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.br{bottom:-6px;right:-6px;border-left:0;border-top:0;border-radius:0 0 8px 0}
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.tip{font-size:14px;font-weight:700;display:flex;align-items:center;gap:8px}
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.badge{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;background:var(--blue);color:#fff;border-radius:6px;font-size:14px;font-weight:900;border:2px solid var(--ink)}
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.cd{font-size:12px;color:var(--ink3);display:flex;align-items:center;gap:6px;width:100%}
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.cd .bar{flex:1;height:8px;background:var(--cream2);border:2px solid var(--ink);border-radius:6px;overflow:hidden}
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.cd .bar i{display:block;height:100%;background:var(--blue);transition:width 1s linear}
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.state{display:flex;flex-direction:column;align-items:center;gap:12px;padding:30px 0;font-size:15px;font-weight:700}
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.ok{color:var(--green);font-size:18px}
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.hint{font-size:12px;color:var(--ink3);font-weight:400}
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svg{display:block}
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</style>
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</head>
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<body>
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<div class="box">
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<div class="head">
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<div class="logo">池易支付</div>
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<div class="orderno">订单号 {{.TradeNo}}</div>
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</div>
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<div class="subject">{{or .Subject "商品订单"}}</div>
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<div class="amount"><span class="cny">¥</span>{{.Money}}</div>
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<div id="wait" class="qr-area"{{if ne .Status 0}} style="display:none"{{end}}>
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<div class="qr-frame">
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{{if .QRDataURL}}<img src="{{.QRDataURL}}" alt="支付宝扫码">{{else}}<div class="qr-empty">二维码生成失败，请刷新重试</div>{{end}}
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<span class="corner tl"></span><span class="corner tr"></span><span class="corner bl"></span><span class="corner br"></span>
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</div>
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<div class="tip"><span class="badge">支</span>打开<b>支付宝</b>扫一扫完成付款</div>
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<div class="cd">⏰ 支付剩余 <b id="cdtext">--:--</b><span class="bar"><i id="cdbar"></i></span></div>
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</div>
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<div id="paid" class="state"{{if ne .Status 1}} style="display:none"{{end}}>
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<svg width="56" height="56" viewBox="0 0 24 24" fill="none"><circle cx="12" cy="12" r="11" fill="#18a058"/><path d="M7 12.5l3.2 3.2L17 9" stroke="#fff" stroke-width="2.4" stroke-linecap="round" stroke-linejoin="round"/></svg>
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<div class="ok">支付成功</div>
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<div class="hint" id="redir" style="display:none">正在跳回商家页面…</div>
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</div>
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<div id="closed" class="state"{{if ne .Status 3}} style="display:none"{{end}}>
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<svg width="48" height="48" viewBox="0 0 24 24" fill="none"><circle cx="12" cy="12" r="11" fill="#909399"/><path d="M8 8l8 8M16 8l-8 8" stroke="#fff" stroke-width="2.4" stroke-linecap="round"/></svg>
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<div>订单已关闭</div>
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</div>
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</div>
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<script>
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var TRADE_NO = {{.TradeNo}};
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var EXPIRED = {{.ExpiredAt}};
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var STATUS = {{.Status}};
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function setState(s) {
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document.getElementById('wait').style.display = s === 0 ? 'flex' : 'none';
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document.getElementById('paid').style.display = s === 1 ? 'flex' : 'none';
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document.getElementById('closed').style.display = s === 3 ? 'flex' : 'none';
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}
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var timer = null;
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function poll() {
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fetch('/api/cashier-status?trade_no=' + encodeURIComponent(TRADE_NO))
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.then(function (r) { return r.json() })
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.then(function (d) {
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var s = typeof d.status === 'number' ? d.status : 0;
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if (s === 1) {
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setState(1);
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if (d.return_url) {
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document.getElementById('redir').style.display = 'block';
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setTimeout(function () { location.href = d.return_url }, 1200);
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}
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clearInterval(timer);
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} else if (s === 3) {
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setState(3);
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clearInterval(timer);
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}
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})
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.catch(function () {});
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}
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if (STATUS === 0) {
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timer = setInterval(poll, 2500);
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poll();
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}
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function tick() {
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var left = Math.max(0, EXPIRED - Math.floor(Date.now() / 1000));
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var m = String(Math.floor(left / 60)).padStart(2, '0');
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var s = String(left % 60).padStart(2, '0');
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var el = document.getElementById('cdtext');
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if (el) el.textContent = m + ':' + s;
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var bar = document.getElementById('cdbar');
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if (bar) bar.style.width = Math.min(100, left / 18) + '%';
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}
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setInterval(tick, 1000);
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tick();
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</script>
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</body>
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</html>`))
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type cashierPageData struct {
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TradeNo string
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Subject string
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Money string
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QRDataURL string
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ExpiredAt int64
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Status int64
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}
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// renderCashier 渲染收银台 HTML（二维码内容 → PNG data URL）。
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func renderCashier(c *fun.RouteCtx, o db.PayOrder) error {
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d := cashierPageData{
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TradeNo: o.TradeNo,
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Subject: o.Subject,
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Money: fenToYuan(o.Money),
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ExpiredAt: o.ExpiredAt,
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Status: o.Status,
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}
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if o.Qrcode != "" {
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if png, err := qrcode.Encode(o.Qrcode, qrcode.Medium, 256); err == nil {
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d.QRDataURL = "data:image/png;base64," + base64.StdEncoding.EncodeToString(png)
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}
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}
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var buf bytes.Buffer
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if err := cashierTmpl.Execute(&buf, d); err != nil {
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return err
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}
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c.RequestCtx.Response.Header.Set("Content-Type", "text/html; charset=utf-8")
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c.RequestCtx.SetBody(buf.Bytes())
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return nil
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}
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// PayCashierStatusHandler GET /cashier-status?trade_no=：收银台页轮询
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// （公开接口，trade_no 不可枚举即凭证；前端经 /api 前缀代理访问）。
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func PayCashierStatusHandler(st *store.Store) fun.RouteHandler {
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return func(c *fun.RouteCtx) error {
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status, returnURL, err := cashierStatusReply(st, strings.TrimSpace(c.Param("trade_no")))
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if err != nil {
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return epayJSON(c, map[string]any{"status": -1})
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}
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return epayJSON(c, map[string]any{"status": status, "return_url": returnURL})
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}
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}
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// cashierStatusReply 收银台状态查询：订单态 + 已支付时的签名回跳地址（RPC 与页面轮询共用）。
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func cashierStatusReply(st *store.Store, tradeNo string) (int64, string, error) {
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o, err := st.Q().GetPayOrderByTradeNo(context.Background(), tradeNo)
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if err != nil {
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return 0, "", err
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}
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lazyCloseExpired(st, &o)
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returnURL := ""
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if o.Status == payStatusPaid && o.ReturnUrl != "" {
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if pid, key, err := payMerchant(st); err == nil {
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returnURL = buildSignedURL(o.ReturnUrl, notifyParams(o, pid), key)
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}
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}
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return o.Status, returnURL, nil
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}
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Devin