添加凭证复制按钮

pages-user/orders/detail.vue

@@ -184,20 +184,6 @@
             <text class="label">算法版本</text>
             <text class="value mono">{{ receipt.algo_version }}</text>
           </view>
-          <view class="info-row" v-if="receipt.server_seed_hash">
-            <text class="label">服务端种子哈希</text>
-            <view class="value-wrap">
-              <text class="value mono seed-text">{{ receipt.server_seed_hash }}</text>
-              <view class="copy-btn" @tap="copyText(receipt.server_seed_hash)">复制</view>
-            </view>
-          </view>
-          <view class="info-row" v-if="receipt.server_sub_seed">
-            <text class="label">子种子</text>
-            <view class="value-wrap">
-              <text class="value mono seed-text">{{ receipt.server_sub_seed }}</text>
-              <view class="copy-btn" @tap="copyText(receipt.server_sub_seed)">复制</view>
-            </view>
-          </view>
           <view class="info-row" v-if="receipt.client_seed">
             <text class="label">客户端种子</text>
             <text class="value mono">{{ receipt.client_seed }}</text>
@@ -219,6 +205,11 @@
           <text class="notice-icon">🔒</text>
           <text class="notice-text">以上数据可用于验证抽奖结果的公正性</text>
         </view>
+        <!-- 复制验证凭据JSON按钮 -->
+        <view class="export-receipt-btn" @tap="exportReceipt">
+          <text class="btn-icon">📋</text>
+          <text class="btn-text">复制验证凭据</text>
+        </view>
       </view>
     </view>
 
@@ -445,6 +436,92 @@ function showProofHelp() {
     showCancel: false
   })
 }
+
+// 导出验证凭据JSON
+function exportReceipt() {
+  if (!order.value || !order.value.draw_receipts || order.value.draw_receipts.length === 0) {
+    uni.showToast({ title: '无抽奖凭据', icon: 'none' })
+    return
+  }
+  
+  // 构建验证凭据JSON
+  const receipts = order.value.draw_receipts.map((r, idx) => {
+    // 解析items_snapshot
+    let weightsStr = ''
+    let rewardsStr = ''
+    let salt = ''
+    let randValue = 0
+    
+    if (r.items_snapshot) {
+      try {
+        const snapshot = typeof r.items_snapshot === 'string' 
+          ? JSON.parse(r.items_snapshot) 
+          : r.items_snapshot
+        
+        // 从snapshot中提取salt和rand（后端存储的实际值）
+        if (snapshot.salt) {
+          salt = snapshot.salt
+        }
+        if (snapshot.rand !== undefined) {
+          randValue = snapshot.rand
+        }
+        
+        // 提取并排序items
+        let items = []
+        if (Array.isArray(snapshot)) {
+          items = snapshot
+        } else if (snapshot.items && Array.isArray(snapshot.items)) {
+          items = snapshot.items
+        }
+
+        if (items.length > 0) {
+          // 必须按ID排序以匹配后端计算逻辑
+          items.sort((a, b) => {
+            const idA = Number(a.id || a.ID || 0)
+            const idB = Number(b.id || b.ID || 0)
+            return idA - idB
+          })
+
+          weightsStr = items.map(item => `${item.id || item.ID}:${item.weight || item.Weight || item.count || 1}`).join(',')
+          rewardsStr = items.map(item => `${item.id || item.ID}:${item.count || item.Count || 1}`).join(',')
+        }
+      } catch (e) {
+        console.warn('items_snapshot解析失败:', e)
+      }
+    }
+    
+    return {
+      mode: r.selected_index > 0 ? 'ichiban' : 'unlimited',
+      version: r.algo_version || 'v1.0',
+      seed: r.server_sub_seed || '',
+      issue_id: r.round_id || 0,
+      user_id: r.client_id || 0,
+      salt: salt,  // 使用items_snapshot中的salt
+      rand_value: randValue,  // 实际随机数（用于验证比对）
+      slot_index: r.selected_index || 0,
+      weights: weightsStr,
+      rewards: rewardsStr,
+      weights_total: r.weights_total || 0,
+      timestamp: r.timestamp || 0,
+      draw_index: idx + 1,
+      items_snapshot: r.items_snapshot
+    }
+  })
+  
+  // 如果只有一条凭据，直接导出单个对象；否则导出数组
+  const exportData = receipts.length === 1 ? receipts[0] : receipts
+  const jsonStr = JSON.stringify(exportData, null, 2)
+  
+  uni.setClipboardData({
+    data: jsonStr,
+    success: () => {
+      uni.showToast({ title: '凭据已复制', icon: 'success' })
+    },
+    fail: () => {
+      uni.showToast({ title: '复制失败', icon: 'none' })
+    }
+  })
+}
 </script>
 
 <style lang="scss" scoped>
@@ -916,5 +993,32 @@ function showProofHelp() {
       color: $text-sub;
     }
   }
+  
+  .export-receipt-btn {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    gap: 12rpx;
+    margin-top: $spacing-lg;
+    padding: 20rpx 32rpx;
+    background: linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);
+    border-radius: 40rpx;
+    box-shadow: 0 8rpx 24rpx rgba(99, 102, 241, 0.3);
+    
+    &:active {
+      transform: scale(0.96);
+      opacity: 0.9;
+    }
+    
+    .btn-icon {
+      font-size: 32rpx;
+    }
+    
+    .btn-text {
+      font-size: 28rpx;
+      font-weight: 600;
+      color: #fff;
+    }
+  }
 }
 </style>