refactor(googleplay): 新增并发发货防护并优化订单状态流转

将 ApplePurchaseServiceImpl、GooglePlayEntitlementApplier 与 GooglePlayWalletBenefitService 中记录的 productId 改为 productName，保持日志与业务语义一致。

src/main/java/com/yolo/keyborad/common/ErrorCode.java

@@ -85,6 +85,7 @@ public enum ErrorCode {
     REPORT_TYPE_INVALID(40020, "举报类型无效"),
     REPORT_COMPANION_ID_EMPTY(40021, "被举报的AI角色ID不能为空"),
     REPORT_TYPE_EMPTY(40022, "举报类型不能为空"),
+    ACCOUNT_RECENTLY_CANCELLED(50038, "账号注销未满7天，暂不允许注册"),
     VERSION_NOT_FOUND(40022, "未找到可用的版本配置");
 
     /**

src/main/java/com/yolo/keyborad/googleplay/GooglePlayApiClient.java

@@ -146,7 +146,7 @@ public class GooglePlayApiClient {
         JsonNode offerDetails = firstLineItem.path("productOfferDetails");
 
         String state = mapOneTimeState(text(root.path("purchaseStateContext"), "purchaseState"));
-
+        String purchaseOptionId = text(offerDetails, "purchaseOptionId");
         // 修正：一次性购买的订单号字段名为 "orderId"
         String googleOrderId = text(root, "orderId");
 
@@ -156,6 +156,7 @@ public class GooglePlayApiClient {
                 .productId(text(firstLineItem, "productId"))
                 .productType(GooglePlayConstants.PRODUCT_TYPE_ONE_TIME)
                 .purchaseToken(purchaseToken)
+                .purchaseOptionId(purchaseOptionId)
                 .orderKey(resolveOrderKey(googleOrderId, purchaseToken))
                 .googleOrderId(googleOrderId)
                 .linkedPurchaseToken(null)

src/main/java/com/yolo/keyborad/googleplay/GooglePlayConstants.java

@@ -25,6 +25,7 @@ public final class GooglePlayConstants {
     public static final String CONSUMPTION_NOT_APPLICABLE = "NOT_APPLICABLE";
 
     public static final String DELIVERY_PENDING = "PENDING";
+    public static final String DELIVERY_PROCESSING = "PROCESSING";
     public static final String DELIVERY_DELIVERED = "DELIVERED";
     public static final String DELIVERY_REVOKED = "REVOKED";
     public static final String DELIVERY_NOT_REQUIRED = "NOT_REQUIRED";

src/main/java/com/yolo/keyborad/googleplay/GooglePlayEntitlementApplier.java

@@ -22,6 +22,7 @@ public class GooglePlayEntitlementApplier {
     private final GooglePlayUserEntitlementMapper entitlementMapper;
     private final GooglePlayVipBenefitService vipBenefitService;
     private final GooglePlayWalletBenefitService walletBenefitService;
+    private final GooglePlayOrderDeliveryGuard orderDeliveryGuard;
 
     public GooglePlayUserEntitlement apply(Long userId,
                                            KeyboardProductItems product,
@@ -29,6 +30,7 @@ public class GooglePlayEntitlementApplier {
                                            GooglePlayOrder order) {
         String benefitType = resolveBenefitType(product, snapshot);
         String entitlementKey = resolveEntitlementKey(benefitType, product.getProductId());
+        boolean grantOwned = orderDeliveryGuard.prepareGrant(benefitType, snapshot, order);
         GooglePlayUserEntitlement entitlement = loadEntitlement(snapshot.getPurchaseToken(), entitlementKey);
         if (entitlement == null) {
             entitlement = new GooglePlayUserEntitlement();
@@ -37,9 +39,11 @@ public class GooglePlayEntitlementApplier {
         fillCommonFields(entitlement, userId, product, snapshot, order, benefitType, entitlementKey);
         switch (benefitType) {
             case GooglePlayConstants.ENTITLEMENT_VIP_SUBSCRIPTION -> applySubscriptionVip(userId, product, snapshot, order, entitlement);
-            case GooglePlayConstants.ENTITLEMENT_VIP_ONE_TIME -> applyOneTimeVip(userId, product, snapshot, order, entitlement);
-            case GooglePlayConstants.ENTITLEMENT_WALLET_TOP_UP -> applyWalletTopUp(userId, product, snapshot, order, entitlement);
-            default -> applyNonConsumable(snapshot, order, entitlement);
+            case GooglePlayConstants.ENTITLEMENT_VIP_ONE_TIME ->
+                    applyOneTimeVip(userId, product, snapshot, order, entitlement, grantOwned);
+            case GooglePlayConstants.ENTITLEMENT_WALLET_TOP_UP ->
+                    applyWalletTopUp(userId, product, snapshot, order, entitlement, grantOwned);
+            default -> applyNonConsumable(snapshot, order, entitlement, grantOwned);
         }
         saveEntitlement(entitlement);
         return entitlement;
@@ -94,9 +98,10 @@ public class GooglePlayEntitlementApplier {
                                  KeyboardProductItems product,
                                  GooglePlayPurchaseSnapshot snapshot,
                                  GooglePlayOrder order,
-                                 GooglePlayUserEntitlement entitlement) {
+                                 GooglePlayUserEntitlement entitlement,
+                                 boolean grantOwned) {
         if (GooglePlayConstants.STATE_ACTIVE.equals(snapshot.getState())) {
-            grantOneTimeVip(userId, product, order, entitlement);
+            grantOneTimeVip(userId, product, order, entitlement, grantOwned);
             return;
         }
         revokeVipEntitlement(userId, order, entitlement);
@@ -106,13 +111,14 @@ public class GooglePlayEntitlementApplier {
                                   KeyboardProductItems product,
                                   GooglePlayPurchaseSnapshot snapshot,
                                   GooglePlayOrder order,
-                                  GooglePlayUserEntitlement entitlement) {
+                                  GooglePlayUserEntitlement entitlement,
+                                  boolean grantOwned) {
         BigDecimal amount = resolveWalletAmount(product);
         if (amount.compareTo(BigDecimal.ZERO) <= 0) {
             throw new BusinessException(ErrorCode.PRODUCT_QUOTA_NOT_SET);
         }
         if (GooglePlayConstants.STATE_ACTIVE.equals(snapshot.getState())) {
-            grantWalletTopUp(userId, product, order, entitlement, amount);
+            grantWalletTopUp(userId, product, order, entitlement, amount, grantOwned);
             return;
         }
         revokeWalletTopUp(userId, order, entitlement, amount);
@@ -120,9 +126,14 @@ public class GooglePlayEntitlementApplier {
 
     private void applyNonConsumable(GooglePlayPurchaseSnapshot snapshot,
                                     GooglePlayOrder order,
-                                    GooglePlayUserEntitlement entitlement) {
+                                    GooglePlayUserEntitlement entitlement,
+                                    boolean grantOwned) {
         boolean active = GooglePlayConstants.STATE_ACTIVE.equals(snapshot.getState())
                 || GooglePlayConstants.STATE_CANCELED.equals(snapshot.getState());
+        if (!grantOwned && active) {
+            entitlement.setActive(GooglePlayConstants.DELIVERY_DELIVERED.equals(order.getDeliveryStatus()));
+            return;
+        }
         entitlement.setActive(active);
         entitlement.setStartTime(snapshot.getStartTime());
         entitlement.setEndTime(snapshot.getExpiryTime());
@@ -139,9 +150,10 @@ public class GooglePlayEntitlementApplier {
     private void grantOneTimeVip(Long userId,
                                  KeyboardProductItems product,
                                  GooglePlayOrder order,
-                                 GooglePlayUserEntitlement entitlement) {
-        if (GooglePlayConstants.DELIVERY_DELIVERED.equals(order.getDeliveryStatus())) {
-            entitlement.setActive(true);
+                                 GooglePlayUserEntitlement entitlement,
+                                 boolean grantOwned) {
+        if (!grantOwned || GooglePlayConstants.DELIVERY_DELIVERED.equals(order.getDeliveryStatus())) {
+            entitlement.setActive(GooglePlayConstants.DELIVERY_DELIVERED.equals(order.getDeliveryStatus()));
             return;
         }
         Date expiry = resolveOneTimeVipExpiry(product);
@@ -172,12 +184,13 @@ public class GooglePlayEntitlementApplier {
                                   KeyboardProductItems product,
                                   GooglePlayOrder order,
                                   GooglePlayUserEntitlement entitlement,
-                                  BigDecimal amount) {
-        if (GooglePlayConstants.DELIVERY_DELIVERED.equals(order.getDeliveryStatus())) {
-            entitlement.setActive(true);
+                                  BigDecimal amount,
+                                  boolean grantOwned) {
+        if (!grantOwned || GooglePlayConstants.DELIVERY_DELIVERED.equals(order.getDeliveryStatus())) {
+            entitlement.setActive(GooglePlayConstants.DELIVERY_DELIVERED.equals(order.getDeliveryStatus()));
             return;
         }
-        walletBenefitService.grant(userId, order.getId(), product.getProductId(), amount);
+        walletBenefitService.grant(userId, order.getId(), product.getName(), amount);
         entitlement.setActive(true);
         entitlement.setQuantity(amount);
         entitlement.setStartTime(new Date());

src/main/java/com/yolo/keyborad/googleplay/GooglePlayOrderDeliveryGuard.java

@@ -0,0 +1,67 @@
+package com.yolo.keyborad.googleplay;
+
+import com.yolo.keyborad.googleplay.model.GooglePlayPurchaseSnapshot;
+import com.yolo.keyborad.mapper.GooglePlayOrderMapper;
+import com.yolo.keyborad.model.entity.googleplay.GooglePlayOrder;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Component;
+
+import java.util.Date;
+
+@Component
+@RequiredArgsConstructor
+public class GooglePlayOrderDeliveryGuard {
+
+    private final GooglePlayOrderMapper orderMapper;
+
+    /**
+     * 一次性商品在真正发权益前先抢占处理资格，避免并发请求重复发货。
+     */
+    public boolean prepareGrant(String benefitType, GooglePlayPurchaseSnapshot snapshot, GooglePlayOrder order) {
+        if (!requiresGrantGuard(benefitType, snapshot) || order.getId() == null) {
+            order.setDeliveryOwnershipGranted(true);
+            return true;
+        }
+        if (GooglePlayConstants.DELIVERY_DELIVERED.equals(order.getDeliveryStatus())) {
+            order.setDeliveryOwnershipGranted(false);
+            return false;
+        }
+        Date now = new Date();
+        int updated = orderMapper.updateDeliveryStatusIfMatch(
+                order.getId(),
+                GooglePlayConstants.DELIVERY_PENDING,
+                GooglePlayConstants.DELIVERY_PROCESSING,
+                now
+        );
+        if (updated == 1) {
+            order.setDeliveryStatus(GooglePlayConstants.DELIVERY_PROCESSING);
+            order.setDeliveryOwnershipGranted(true);
+            order.setUpdatedAt(now);
+            return true;
+        }
+        refreshDeliveryState(order);
+        order.setDeliveryOwnershipGranted(false);
+        return false;
+    }
+
+    private boolean requiresGrantGuard(String benefitType, GooglePlayPurchaseSnapshot snapshot) {
+        if (!GooglePlayConstants.PRODUCT_TYPE_ONE_TIME.equals(snapshot.getProductType())) {
+            return false;
+        }
+        if (GooglePlayConstants.ENTITLEMENT_NON_CONSUMABLE.equals(benefitType)) {
+            return GooglePlayConstants.STATE_ACTIVE.equals(snapshot.getState())
+                    || GooglePlayConstants.STATE_CANCELED.equals(snapshot.getState());
+        }
+        return GooglePlayConstants.STATE_ACTIVE.equals(snapshot.getState());
+    }
+
+    private void refreshDeliveryState(GooglePlayOrder order) {
+        GooglePlayOrder latestOrder = orderMapper.selectById(order.getId());
+        if (latestOrder == null) {
+            return;
+        }
+        order.setDeliveryStatus(latestOrder.getDeliveryStatus());
+        order.setGrantedQuantity(latestOrder.getGrantedQuantity());
+        order.setUpdatedAt(latestOrder.getUpdatedAt());
+    }
+}

src/main/java/com/yolo/keyborad/googleplay/GooglePlayStateService.java

@@ -15,6 +15,7 @@ import com.yolo.keyborad.model.entity.googleplay.GooglePlayUserEntitlement;
 import com.yolo.keyborad.service.KeyboardProductItemsService;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Component;
+import org.springframework.dao.DuplicateKeyException;
 import org.springframework.transaction.annotation.Transactional;
 
 import java.math.BigDecimal;
@@ -32,11 +33,13 @@ public class GooglePlayStateService {
 
     @Transactional(rollbackFor = Exception.class)
     public GooglePlaySyncResult sync(GooglePlaySyncCommand command, GooglePlayPurchaseSnapshot snapshot) {
-        KeyboardProductItems product = loadProduct(snapshot.getBasePlanId());
+        String productId = (snapshot.getBasePlanId() != null) ?
+                snapshot.getBasePlanId() :
+                snapshot.getPurchaseOptionId();
+        KeyboardProductItems product = loadProduct(productId);
         GooglePlayOrder order = buildOrder(command, snapshot);
         GooglePlayPurchaseToken token = buildToken(command, snapshot);
-        // 先保存订单以确保 order.id 已生成，钱包充值等权益分发依赖 order.id 写入交易流水
-        saveOrder(order);
+        persistOrderIfNew(order);
         GooglePlayUserEntitlement entitlement = null;
         if (command.getUserId() != null) {
             entitlement = entitlementApplier.apply(command.getUserId(), product, snapshot, order);
@@ -51,8 +54,8 @@ public class GooglePlayStateService {
                 .order(order)
                 .token(token)
                 .entitlement(entitlement)
-                .acknowledgeRequired(requiresAcknowledge(snapshot, command.getUserId()))
-                .consumeRequired(requiresConsume(snapshot, entitlement, command.getUserId()))
+                .acknowledgeRequired(requiresAcknowledge(snapshot, command.getUserId(), order))
+                .consumeRequired(requiresConsume(snapshot, entitlement, command.getUserId(), order))
                 .linkedPurchaseTokenToSync(resolveLinkedToken(snapshot))
                 .build();
     }
@@ -144,15 +147,22 @@ public class GooglePlayStateService {
         return token;
     }
 
-    private boolean requiresAcknowledge(GooglePlayPurchaseSnapshot snapshot, Long userId) {
-        return userId != null
-                && GooglePlayConstants.ACK_PENDING.equals(snapshot.getAcknowledgementState())
-                && GooglePlayConstants.STATE_ACTIVE.equals(snapshot.getState());
+    private boolean requiresAcknowledge(GooglePlayPurchaseSnapshot snapshot, Long userId, GooglePlayOrder order) {
+        if (userId == null
+                || !GooglePlayConstants.ACK_PENDING.equals(snapshot.getAcknowledgementState())
+                || !GooglePlayConstants.STATE_ACTIVE.equals(snapshot.getState())) {
+            return false;
+        }
+        if (!GooglePlayConstants.PRODUCT_TYPE_ONE_TIME.equals(snapshot.getProductType())) {
+            return true;
+        }
+        return Boolean.TRUE.equals(order.getDeliveryOwnershipGranted());
     }
 
     private boolean requiresConsume(GooglePlayPurchaseSnapshot snapshot,
                                     GooglePlayUserEntitlement entitlement,
-                                    Long userId) {
+                                    Long userId,
+                                    GooglePlayOrder order) {
         if (userId == null || entitlement == null) {
             return false;
         }
@@ -160,7 +170,8 @@ public class GooglePlayStateService {
         boolean wallet = GooglePlayConstants.ENTITLEMENT_WALLET_TOP_UP.equals(entitlement.getBenefitType());
         boolean active = GooglePlayConstants.STATE_ACTIVE.equals(snapshot.getState());
         boolean pending = GooglePlayConstants.CONSUMPTION_PENDING.equals(snapshot.getConsumptionState());
-        return oneTime && wallet && active && pending;
+        boolean owned = Boolean.TRUE.equals(order.getDeliveryOwnershipGranted());
+        return oneTime && wallet && active && pending && owned;
     }
 
     private String resolveLinkedToken(GooglePlayPurchaseSnapshot snapshot) {
@@ -172,20 +183,67 @@ public class GooglePlayStateService {
 
     private void saveOrder(GooglePlayOrder order) {
         if (order.getId() == null) {
-            orderMapper.insert(order);
+            insertOrder(order);
             return;
         }
         orderMapper.updateById(order);
     }
 
+    /**
+     * 仅在新订单场景预落库，避免并发请求用旧快照把发货状态回写成 PENDING。
+     */
+    private void persistOrderIfNew(GooglePlayOrder order) {
+        if (order.getId() == null) {
+            saveOrder(order);
+        }
+    }
+
     private void saveToken(GooglePlayPurchaseToken token) {
         if (token.getId() == null) {
-            purchaseTokenMapper.insert(token);
+            insertToken(token);
             return;
         }
         purchaseTokenMapper.updateById(token);
     }
 
+    /**
+     * 并发首写同一订单时，唯一键冲突后回读已存在记录继续流程。
+     */
+    private void insertOrder(GooglePlayOrder order) {
+        try {
+            orderMapper.insert(order);
+        } catch (DuplicateKeyException e) {
+            GooglePlayOrder existingOrder = orderMapper.selectOne(Wrappers.<GooglePlayOrder>lambdaQuery()
+                    .eq(GooglePlayOrder::getOrderKey, order.getOrderKey())
+                    .last("LIMIT 1"));
+            if (existingOrder == null) {
+                throw e;
+            }
+            order.setId(existingOrder.getId());
+            order.setCreatedAt(existingOrder.getCreatedAt());
+            order.setDeliveryStatus(existingOrder.getDeliveryStatus());
+            order.setGrantedQuantity(existingOrder.getGrantedQuantity());
+            orderMapper.updateById(order);
+        }
+    }
+
+    /**
+     * purchaseToken 首次并发写入时回读已有记录，避免重复插入直接失败。
+     */
+    private void insertToken(GooglePlayPurchaseToken token) {
+        try {
+            purchaseTokenMapper.insert(token);
+        } catch (DuplicateKeyException e) {
+            GooglePlayPurchaseToken existingToken = findToken(token.getPurchaseToken());
+            if (existingToken == null) {
+                throw e;
+            }
+            token.setId(existingToken.getId());
+            token.setCreatedAt(existingToken.getCreatedAt());
+            purchaseTokenMapper.updateById(token);
+        }
+    }
+
     private void updateAckState(String purchaseToken, String orderKey, String state) {
         GooglePlayPurchaseToken token = findToken(purchaseToken);
         if (token != null) {

src/main/java/com/yolo/keyborad/googleplay/GooglePlayWalletBenefitService.java

@@ -20,7 +20,7 @@ public class GooglePlayWalletBenefitService {
     private final KeyboardUserWalletService walletService;
     private final KeyboardWalletTransactionService walletTransactionService;
 
-    public void grant(Long userId, Long orderId, String productId, BigDecimal amount) {
+    public void grant(Long userId, Long orderId, String productName, BigDecimal amount) {
         KeyboardUserWallet wallet = getOrCreateWallet(userId);
         BigDecimal before = defaultBalance(wallet.getBalance());
         BigDecimal after = before.add(amount);
@@ -28,7 +28,7 @@ public class GooglePlayWalletBenefitService {
         wallet.setUpdatedAt(new Date());
         walletService.saveOrUpdate(wallet);
         walletTransactionService.createTransaction(userId, orderId, amount, GOOGLE_PLAY_WALLET_TX_TYPE,
-                before, after, "Google Play 充值: " + productId);
+                before, after,   productName);
     }
 
     public boolean revoke(Long userId, Long orderId, BigDecimal amount) {

src/main/java/com/yolo/keyborad/googleplay/model/GooglePlayPurchaseSnapshot.java

@@ -56,4 +56,6 @@ public class GooglePlayPurchaseSnapshot {
     private Date lastSyncedAt;
 
     private String rawResponse;
+
+    private String purchaseOptionId;
 }

src/main/java/com/yolo/keyborad/mapper/GooglePlayOrderMapper.java

@@ -2,6 +2,23 @@ package com.yolo.keyborad.mapper;
 
 import com.baomidou.mybatisplus.core.mapper.BaseMapper;
 import com.yolo.keyborad.model.entity.googleplay.GooglePlayOrder;
+import org.apache.ibatis.annotations.Param;
+import org.apache.ibatis.annotations.Update;
 
 public interface GooglePlayOrderMapper extends BaseMapper<GooglePlayOrder> {
+
+    /**
+     * 原子抢占发货资格，只有当前状态匹配时才允许进入处理中。
+     */
+    @Update("""
+            UPDATE google_play_order
+            SET delivery_status = #{targetStatus},
+                updated_at = #{updatedAt}
+            WHERE id = #{orderId}
+              AND delivery_status = #{expectedStatus}
+            """)
+    int updateDeliveryStatusIfMatch(@Param("orderId") Long orderId,
+                                    @Param("expectedStatus") String expectedStatus,
+                                    @Param("targetStatus") String targetStatus,
+                                    @Param("updatedAt") java.util.Date updatedAt);
 }

src/main/java/com/yolo/keyborad/model/entity/googleplay/GooglePlayOrder.java

@@ -81,4 +81,10 @@ public class GooglePlayOrder {
 
     @TableField("updated_at")
     private Date updatedAt;
+
+    /**
+     * 当前线程是否拿到了本次发货资格，仅用于本次请求内控制幂等，不落库。
+     */
+    @TableField(exist = false)
+    private Boolean deliveryOwnershipGranted;
 }

src/main/java/com/yolo/keyborad/service/impl/ApplePurchaseServiceImpl.java

@@ -783,7 +783,7 @@ public class ApplePurchaseServiceImpl implements ApplePurchaseService {
                 (short) 2, // 交易类型：2-苹果内购充值
                 before,
                 after,
-                "Apple 充值: " + product.getProductId()
+                  product.getName()
         );
         
         // 8. 记录充值成功日志

src/main/java/com/yolo/keyborad/service/impl/ChatServiceImpl.java

@@ -538,7 +538,7 @@ public class ChatServiceImpl implements ChatService {
 
             // 1. TTS 转换
             long ttsStart = System.currentTimeMillis();
-            TextToSpeechVO ttsResult = elevenLabsService.textToSpeechWithTimestamps(text, voiceId);
+            TextToSpeechVO ttsResult = elevenLabsService.textToSpeechWithTimestamps(text.replaceAll("\\(.*?\\)", ""), voiceId);
             long ttsDuration = System.currentTimeMillis() - ttsStart;
             log.info("TTS 完成, audioId: {}, 耗时: {}ms", audioId, ttsDuration);
 

src/main/java/com/yolo/keyborad/service/impl/KeyboardThemePurchaseServiceImpl.java

@@ -133,7 +133,7 @@ public class KeyboardThemePurchaseServiceImpl extends ServiceImpl<KeyboardThemeP
                 (short) 1,                                      // 交易类型：1-购买主题
                 beforeBalance,                                   // 交易前余额
                 afterBalance,                                    // 交易后余额
-                "购买主题: " + theme.getThemeName()             // 交易备注
+                theme.getThemeName()             // 交易备注
         );
 
         // 8. 更新购买记录的交易ID

src/main/java/com/yolo/keyborad/service/impl/UserServiceImpl.java

@@ -27,6 +27,8 @@ import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
 import java.math.BigDecimal;
+import java.time.Instant;
+import java.time.temporal.ChronoUnit;
 import java.util.Date;
 import com.yolo.keyborad.service.impl.user.UserInviteCodeBinder;
 import com.yolo.keyborad.service.impl.user.UserMailVerificationHandler;
@@ -90,8 +92,26 @@ public class UserServiceImpl extends ServiceImpl<KeyboardUserMapper, KeyboardUse
                 .eq(KeyboardUser::getStatus, false));
     }
 
+    private static final int ACCOUNT_REUSE_COOLDOWN_DAYS = 7;
+
+    private void ensureSubjectIdNotRecentlyCancelled(String sub) {
+        Date cooldownStart = Date.from(Instant.now().minus(ACCOUNT_REUSE_COOLDOWN_DAYS, ChronoUnit.DAYS));
+        KeyboardUser recentlyDeleted = keyboardUserMapper.selectOne(
+                new LambdaQueryWrapper<KeyboardUser>()
+                        .eq(KeyboardUser::getSubjectId, sub)
+                        .eq(KeyboardUser::getDeleted, true)
+                        .gt(KeyboardUser::getDeletedAt, cooldownStart)
+                        .last("LIMIT 1")
+        );
+        if (recentlyDeleted != null) {
+            throw new BusinessException(ErrorCode.ACCOUNT_RECENTLY_CANCELLED);
+        }
+    }
+
     @Override
     public KeyboardUser createUserWithSubjectId(String sub) {
+        ensureSubjectIdNotRecentlyCancelled(sub);
+
         KeyboardUser keyboardUser = buildNewUserWithSubjectId(sub);
         keyboardUserMapper.insert(keyboardUser);
         keyboardCharacterService.addDefaultUserCharacter(keyboardUser.getId());

src/main/java/com/yolo/keyborad/service/impl/user/UserRegistrationHandler.java

@@ -18,6 +18,8 @@ import com.yolo.keyborad.service.KeyboardUserQuotaTotalService;
 import com.yolo.keyborad.service.KeyboardUserWalletService;
 import com.yolo.keyborad.utils.RedisUtil;
 import java.math.BigDecimal;
+import java.time.Instant;
+import java.time.temporal.ChronoUnit;
 import java.util.Date;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.security.crypto.password.PasswordEncoder;
@@ -33,6 +35,7 @@ import org.springframework.transaction.annotation.Transactional;
 public class UserRegistrationHandler {
 
     private static final String USER_CODE_PREFIX = "user:";
+    private static final int ACCOUNT_REUSE_COOLDOWN_DAYS = 7;
 
     private final KeyboardUserMapper keyboardUserMapper;
     private final PasswordEncoder passwordEncoder;
@@ -91,6 +94,24 @@ public class UserRegistrationHandler {
         if (userMail != null) {
             throw new BusinessException(ErrorCode.USER_HAS_EXISTED);
         }
+
+        ensureNotRecentlyCancelled(
+                new LambdaQueryWrapper<KeyboardUser>()
+                        .eq(KeyboardUser::getEmail, mailAddress)
+        );
+    }
+
+    private void ensureNotRecentlyCancelled(LambdaQueryWrapper<KeyboardUser> baseQuery) {
+        Date cooldownStart = Date.from(Instant.now().minus(ACCOUNT_REUSE_COOLDOWN_DAYS, ChronoUnit.DAYS));
+        KeyboardUser recentlyDeleted = keyboardUserMapper.selectOne(
+                baseQuery
+                        .eq(KeyboardUser::getDeleted, true)
+                        .gt(KeyboardUser::getDeletedAt, cooldownStart)
+                        .last("LIMIT 1")
+        );
+        if (recentlyDeleted != null) {
+            throw new BusinessException(ErrorCode.ACCOUNT_RECENTLY_CANCELLED);
+        }
     }
 
     private void validatePasswords(UserRegisterDTO userRegisterDTO) {

src/main/resources/application-dev.yml

@@ -119,7 +119,7 @@ nacos:
 elevenlabs:
   api-key: sk_25339d32bb14c91f460ed9fce83a1951672f07846a7a10ce
   voice-id: JBFqnCBsd6RMkjVDRZzb
-  model-id: eleven_turbo_v2_5
+  model-id: eleven_flash_v2_5
   output-format: mp3_44100_128
 
 deepgram:

src/main/resources/application-prod.yml

@@ -91,7 +91,7 @@ sa-token:
 elevenlabs:
   api-key: sk_25339d32bb14c91f460ed9fce83a1951672f07846a7a10ce
   voice-id: JBFqnCBsd6RMkjVDRZzb
-  model-id: eleven_turbo_v2_5
+  model-id: eleven_flash_v2_5
   output-format: mp3_44100_128
 
 deepgram: