feat(activity): 实现抽奖随机承诺与验证功能

新增随机种子生成与验证逻辑，包括：
1. 添加随机承诺生成接口
2. 实现抽奖执行与验证流程
3. 新增批量用户创建与删除功能
4. 添加抽奖收据记录表
5. 完善配置管理与错误码

新增测试用例验证随机算法正确性

cmd/gormgen/README.md

@@ -36,6 +36,6 @@ eg :
 # 根目录下执行
 go run cmd/gormgen/main.go -dsn "root:api2api..@tcp(sh-cynosdbmysql-grp-88th45wy.sql.tencentcdb.com:28555)/bindbox_game?charset=utf8mb4&parseTime=True&loc=Local" -tables "admin,log_operation,log_request,activities,activity_categories,activity_draw_logs,activity_issues,activity_reward_settings,guild,guild_boxes,guild_contribute_logs,guild_members,system_coupons,user_coupons,user_inventory,user_inventory_transfers,user_points,user_points_ledger"
 
-go run cmd/gormgen/main.go -dsn "root:api2api..@tcp(sh-cynosdbmysql-grp-88th45wy.sql.tencentcdb.com:28555)/bindbox_game?charset=utf8mb4&parseTime=True&loc=Local" -tables "admin,log_operation,log_request,activities,activity_categories,activity_draw_logs,activity_issues,activity_reward_settings,guild,guild_boxes,guild_contribute_logs,guild_members,system_coupons,user_coupons,user_inventory,user_inventory_transfers,user_points,user_points_ledger,users,user_addresses,menu_actions,menus,role_actions,role_menus,role_users,roles,order_items,orders,products,shipping_records,product_categories,user_invites,system_item_cards,user_item_cards,activity_draw_effects,banner"
+go run cmd/gormgen/main.go -dsn "root:api2api..@tcp(sh-cynosdbmysql-grp-88th45wy.sql.tencentcdb.com:28555)/bindbox_game?charset=utf8mb4&parseTime=True&loc=Local" -tables "admin,log_operation,log_request,activities,activity_categories,activity_draw_logs,activity_issues,activity_reward_settings,guild,guild_boxes,guild_contribute_logs,guild_members,system_coupons,user_coupons,user_inventory,user_inventory_transfers,user_points,user_points_ledger,users,user_addresses,menu_actions,menus,role_actions,role_menus,role_users,roles,order_items,orders,products,shipping_records,product_categories,user_invites,system_item_cards,user_item_cards,activity_draw_effects,banner,issue_random_commitments,activity_draw_receipts"
 
 ```

configs/configs.go

@@ -50,6 +50,10 @@ type Config struct {
 		SecretKey string `mapstructure:"secret_key" toml:"secret_key"`
 		BaseURL   string `mapstructure:"base_url" toml:"base_url"`
 	} `mapstructure:"cos" toml:"cos"`
+
+	Random struct {
+		CommitMasterKey string `mapstructure:"commit_master_key" toml:"commit_master_key"`
+	} `mapstructure:"random" toml:"random"`
 }
 
 var (

configs/dev_configs.toml

@@ -0,0 +1,19 @@
+[mysql]
+  [mysql.read]
+    addr = "127.0.0.1:3306"
+    user = "root"
+    pass = "123456"
+    name = "bindbox_game"
+  [mysql.write]
+    addr = "127.0.0.1:3306"
+    user = "root"
+    pass = "123456"
+    name = "bindbox_game"
+
+[redis]
+  addr = "127.0.0.1:6379"
+  pass = ""
+  db = 0
+
+[random]
+  commit_master_key = "a1b2c3d4e5f6789012345678901234567890abcdef1234567890abcdef123456"

configs/fat_configs.toml

@@ -27,3 +27,6 @@ secret_id = "AKIDtjPtAFPNDuR1UnxvoUCoRAnJgw164Zv6"
 secret_key = "B0vvjMoMsKcipnJlLnFyWt6A2JRSJ0Wr"
 # 可选：如有 CDN/自定义域名则填写，否则留空
 base_url = ""
+
+[random]
+commit_master_key = "4d7a3b8f9c2e1a5d6b4f8c0e3a7d2b1c6f9e4a5d8c1b3f7a2e5d6c4b8f0e3a7d2b1c"

configs/pro_configs.toml

@@ -1,2 +1,19 @@
+[mysql]
+  [mysql.read]
+    addr = "127.0.0.1:3306"
+    user = "root"
+    pass = "123456"
+    name = "bindbox_game"
+  [mysql.write]
+    addr = "127.0.0.1:3306"
+    user = "root"
+    pass = "123456"
+    name = "bindbox_game"
 
+[redis]
+  addr = "127.0.0.1:6379"
+  pass = ""
+  db = 0
 
+[random]
+  commit_master_key = "a1b2c3d4e5f6789012345678901234567890abcdef1234567890abcdef123456"

configs/uat_configs.toml

@@ -1,2 +1,19 @@
+[mysql]
+  [mysql.read]
+    addr = "127.0.0.1:3306"
+    user = "root"
+    pass = "123456"
+    name = "bindbox_game"
+  [mysql.write]
+    addr = "127.0.0.1:3306"
+    user = "root"
+    pass = "123456"
+    name = "bindbox_game"
 
+[redis]
+  addr = "127.0.0.1:6379"
+  pass = ""
+  db = 0
 
+[random]
+  commit_master_key = "a1b2c3d4e5f6789012345678901234567890abcdef1234567890abcdef123456"

internal/api/activity/draw_app.go

@@ -0,0 +1,35 @@
+package app
+
+import (
+    "net/http"
+    "strconv"
+
+    "bindbox-game/internal/code"
+    "bindbox-game/internal/pkg/core"
+    "bindbox-game/internal/pkg/validation"
+)
+
+type executeDrawResponse struct {
+    Receipt interface{} `json:"receipt"`
+}
+
+func (h *handler) ExecuteDraw() core.HandlerFunc {
+    return func(ctx core.Context) {
+        issueIDStr := ctx.Param("issue_id")
+        if issueIDStr == "" {
+            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ParamBindError, "未传递期ID"))
+            return
+        }
+        if _, err := strconv.ParseInt(issueIDStr, 10, 64); err != nil {
+            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ParamBindError, validation.Error(err)))
+            return
+        }
+        issueID, _ := strconv.ParseInt(issueIDStr, 10, 64)
+        rec, err := h.activity.ExecuteDraw(ctx.RequestContext(), issueID)
+        if err != nil {
+            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ExecuteDrawError, err.Error()))
+            return
+        }
+        ctx.Payload(&executeDrawResponse{Receipt: rec})
+    }
+}

internal/api/admin/batch_draw.go

@@ -0,0 +1,152 @@
+package admin
+
+import (
+	"encoding/hex"
+	"encoding/json"
+	"net/http"
+	"strconv"
+
+	"bindbox-game/internal/code"
+	"bindbox-game/internal/pkg/core"
+	"bindbox-game/internal/pkg/validation"
+	"bindbox-game/internal/repository/mysql/model"
+)
+
+type batchDrawRequest struct {
+	UserIDs []int64 `json:"user_ids" binding:"required,min=1,max=1000,dive,min=1"`
+}
+
+type batchDrawResponse struct {
+	Draws []drawResultItem `json:"draws"`
+}
+
+type drawResultItem struct {
+	UserID     int64       `json:"user_id"`
+	DrawID     int64       `json:"draw_id"`
+	RewardID   int64       `json:"reward_id"`
+	RewardName string      `json:"reward_name"`
+	IsWinner   bool        `json:"is_winner"`
+	Receipt    interface{} `json:"receipt"`
+}
+
+func (h *handler) BatchDrawForUsers() core.HandlerFunc {
+	return func(ctx core.Context) {
+		issueIDStr := ctx.Param("issue_id")
+		if issueIDStr == "" {
+			ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ParamBindError, "未传递期ID"))
+			return
+		}
+		if _, err := strconv.ParseInt(issueIDStr, 10, 64); err != nil {
+			ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ParamBindError, validation.Error(err)))
+			return
+		}
+		issueID, _ := strconv.ParseInt(issueIDStr, 10, 64)
+		var req batchDrawRequest
+		if err := ctx.ShouldBindJSON(&req); err != nil {
+			ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ParamBindError, validation.Error(err)))
+			return
+		}
+		rewards, err := h.activity.ListIssueRewards(ctx.RequestContext(), issueID)
+		if err != nil {
+			ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ExecuteDrawError, err.Error()))
+			return
+		}
+		rewardMap := make(map[int64]string, len(rewards))
+		for _, r := range rewards {
+			rewardMap[r.ID] = r.Name
+		}
+
+		// 开始事务处理
+		tx := h.writeDB.Begin()
+		if tx.Error != nil {
+			ctx.AbortWithError(core.Error(http.StatusInternalServerError, code.ExecuteDrawError, "启动事务失败"))
+			return
+		}
+		defer func() {
+			if r := recover(); r != nil {
+				tx.Rollback()
+				panic(r)
+			}
+		}()
+
+		draws := make([]drawResultItem, 0, len(req.UserIDs))
+		for _, uid := range req.UserIDs {
+			// 执行抽奖
+			rec, err := h.activity.ExecuteDraw(ctx.RequestContext(), issueID)
+			if err != nil {
+				tx.Rollback()
+				ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ExecuteDrawError, err.Error()))
+				return
+			}
+
+			// 创建抽奖日志
+			isWinner := int32(0)
+			if rec.SelectedItemId > 0 {
+				isWinner = 1
+			}
+
+			drawLog := &model.ActivityDrawLogs{
+				UserID:   uid,
+				IssueID:  issueID,
+				RewardID: rec.SelectedItemId,
+				IsWinner: isWinner,
+				Level:    1, // 默认等级
+			}
+
+			if err := tx.ActivityDrawLogs.Create(drawLog); err != nil {
+				tx.Rollback()
+				ctx.AbortWithError(core.Error(http.StatusInternalServerError, code.ExecuteDrawError, "创建抽奖日志失败"))
+				return
+			}
+
+			// 保存抽奖收据
+			itemsSnapshot, _ := json.Marshal(rec.Items)
+			receipt := &model.ActivityDrawReceipts{
+				DrawLogID:      drawLog.ID,
+				AlgoVersion:    rec.AlgoVersion,
+				RoundID:        rec.RoundId,
+				DrawID:         rec.DrawId,
+				ClientID:       rec.ClientId,
+				Timestamp:      rec.Timestamp,
+				ServerSeedHash: hex.EncodeToString(rec.ServerSeedHash),
+				ServerSubSeed:  hex.EncodeToString(rec.ServerSubSeed),
+				ClientSeed:     hex.EncodeToString(rec.ClientSeed),
+				Nonce:          int64(rec.Nonce),
+				ItemsRoot:      hex.EncodeToString(rec.ItemsRoot),
+				WeightsTotal:   int64(rec.WeightsTotal),
+				SelectedIndex:  int32(rec.SelectedIndex),
+				RandProof:      hex.EncodeToString(rec.RandProof),
+				Signature:      "", // 可以后续添加签名
+				ItemsSnapshot:  string(itemsSnapshot),
+			}
+
+			if err := tx.ActivityDrawReceipts.Create(receipt); err != nil {
+				tx.Rollback()
+				ctx.AbortWithError(core.Error(http.StatusInternalServerError, code.ExecuteDrawError, "保存抽奖收据失败"))
+				return
+			}
+
+			name := ""
+			if rec.SelectedItemId > 0 {
+				name = rewardMap[rec.SelectedItemId]
+			}
+			draws = append(draws, drawResultItem{
+				UserID:     uid,
+				DrawID:     rec.DrawId,
+				RewardID:   rec.SelectedItemId,
+				RewardName: name,
+				IsWinner:   rec.SelectedItemId > 0,
+				Receipt:    rec,
+			})
+		}
+
+		// 提交事务
+		if err := tx.Commit(); err != nil {
+			tx.Rollback()
+			ctx.AbortWithError(core.Error(http.StatusInternalServerError, code.ExecuteDrawError, "提交事务失败"))
+			return
+		}
+
+		ctx.Payload(&batchDrawResponse{Draws: draws})
+	}
+}

internal/api/admin/batch_users.go

@@ -0,0 +1,82 @@
+package admin
+
+import (
+    "net/http"
+    "strconv"
+    "time"
+
+    "bindbox-game/internal/code"
+    "bindbox-game/internal/pkg/core"
+    "bindbox-game/internal/pkg/validation"
+    "bindbox-game/internal/service/user"
+)
+
+type batchUsersRequest struct {
+	Count int `json:"count" binding:"min=1,max=1000"`
+}
+
+type batchUsersResponse struct {
+	Users []batchUserItem `json:"users"`
+}
+
+type batchUserItem struct {
+	ID       int64  `json:"id"`
+	Nickname string `json:"nickname"`
+	OpenID   string `json:"open_id"`
+	Avatar   string `json:"avatar"`
+}
+
+func (h *handler) BatchCreateUsers() core.HandlerFunc {
+	return func(ctx core.Context) {
+		var req batchUsersRequest
+		if err := ctx.ShouldBindJSON(&req); err != nil {
+			ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ParamBindError, validation.Error(err)))
+			return
+		}
+		users := make([]batchUserItem, 0, req.Count)
+		for i := 0; i < req.Count; i++ {
+			nickname := "用户" + strconv.Itoa(i+1) + "_" + strconv.FormatInt(time.Now().UnixNano()%10000, 10)
+			openID := "batch_" + strconv.FormatInt(time.Now().UnixNano(), 10)
+			avatar := "https://trae-api-sg.mchost.guru/api/ide/v1/text_to_image?prompt=avatar&image_size=square"
+			u, err := h.user.CreateUser(ctx.RequestContext(), user.CreateUserInput{
+				Nickname: nickname,
+				OpenID:   openID,
+				Avatar:   avatar,
+			})
+			if err != nil {
+				ctx.AbortWithError(core.Error(http.StatusBadRequest, code.CreateUserError, err.Error()))
+				return
+			}
+			users = append(users, batchUserItem{
+				ID:       u.ID,
+				Nickname: u.Nickname,
+				OpenID:   u.Openid,
+				Avatar:   u.Avatar,
+			})
+		}
+		ctx.Payload(&batchUsersResponse{Users: users})
+	}
+}
+
+func (h *handler) BatchDeleteUsers() core.HandlerFunc {
+	return func(ctx core.Context) {
+		var req struct {
+			UserIDs []int64 `json:"user_ids" binding:"required,min=1,max=1000,dive,min=1"`
+		}
+		if err := ctx.ShouldBindJSON(&req); err != nil {
+			ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ParamBindError, validation.Error(err)))
+			return
+		}
+		if ctx.SessionUserInfo().IsSuper != 1 {
+			ctx.AbortWithError(core.Error(http.StatusBadRequest, code.DeleteUserError, "禁止操作"))
+			return
+		}
+		for _, uid := range req.UserIDs {
+			if err := h.user.DeleteUser(ctx.RequestContext(), uid); err != nil {
+				ctx.AbortWithError(core.Error(http.StatusBadRequest, code.DeleteUserError, err.Error()))
+				return
+			}
+		}
+		ctx.Payload(&simpleMessageResponse{Message: "操作成功"})
+	}
+}

internal/api/admin/draw_receipt.go

@@ -0,0 +1,121 @@
+package admin
+
+import (
+	"net/http"
+	"strconv"
+
+	"bindbox-game/internal/code"
+	"bindbox-game/internal/pkg/core"
+)
+
+type getDrawReceiptResponse struct {
+	ID             int64  `json:"id"`
+	DrawLogID      int64  `json:"draw_log_id"`
+	AlgoVersion    string `json:"algo_version"`
+	RoundID        int64  `json:"round_id"`
+	DrawID         int64  `json:"draw_id"`
+	ClientID       int64  `json:"client_id"`
+	Timestamp      int64  `json:"timestamp"`
+	ServerSeedHash string `json:"server_seed_hash"`
+	ServerSubSeed  string `json:"server_sub_seed"`
+	ClientSeed     string `json:"client_seed"`
+	Nonce          int64  `json:"nonce"`
+	ItemsRoot      string `json:"items_root"`
+	WeightsTotal   int64  `json:"weights_total"`
+	SelectedIndex  int32  `json:"selected_index"`
+	RandProof      string `json:"rand_proof"`
+	Signature      string `json:"signature"`
+	ItemsSnapshot  string `json:"items_snapshot"`
+}
+
+func (h *handler) GetDrawReceipt() core.HandlerFunc {
+	return func(ctx core.Context) {
+		drawIDStr := ctx.Param("draw_id")
+		if drawIDStr == "" {
+			ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ParamBindError, "未传递抽奖ID"))
+			return
+		}
+
+		drawID, err := strconv.ParseInt(drawIDStr, 10, 64)
+		if err != nil {
+			ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ParamBindError, "抽奖ID格式错误"))
+			return
+		}
+
+		// 查询抽奖收据
+		receipt, err := h.readDB.ActivityDrawReceipts.WithContext(ctx.RequestContext()).
+			Where(h.readDB.ActivityDrawReceipts.DrawID.Eq(drawID)).
+			First()
+
+		if err != nil {
+			ctx.AbortWithError(core.Error(http.StatusNotFound, code.GetDrawReceiptError, "未找到抽奖收据"))
+			return
+		}
+
+		ctx.Payload(&getDrawReceiptResponse{
+			ID:             receipt.ID,
+			DrawLogID:      receipt.DrawLogID,
+			AlgoVersion:    receipt.AlgoVersion,
+			RoundID:        receipt.RoundID,
+			DrawID:         receipt.DrawID,
+			ClientID:       receipt.ClientID,
+			Timestamp:      receipt.Timestamp,
+			ServerSeedHash: receipt.ServerSeedHash,
+			ServerSubSeed:  receipt.ServerSubSeed,
+			ClientSeed:     receipt.ClientSeed,
+			Nonce:          receipt.Nonce,
+			ItemsRoot:      receipt.ItemsRoot,
+			WeightsTotal:   receipt.WeightsTotal,
+			SelectedIndex:  receipt.SelectedIndex,
+			RandProof:      receipt.RandProof,
+			Signature:      receipt.Signature,
+			ItemsSnapshot:  receipt.ItemsSnapshot,
+		})
+	}
+}
+
+func (h *handler) GetDrawReceiptByLogID() core.HandlerFunc {
+	return func(ctx core.Context) {
+		logIDStr := ctx.Param("log_id")
+		if logIDStr == "" {
+			ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ParamBindError, "未传递日志ID"))
+			return
+		}
+
+		logID, err := strconv.ParseInt(logIDStr, 10, 64)
+		if err != nil {
+			ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ParamBindError, "日志ID格式错误"))
+			return
+		}
+
+		// 查询抽奖收据
+		receipt, err := h.readDB.ActivityDrawReceipts.WithContext(ctx.RequestContext()).
+			Where(h.readDB.ActivityDrawReceipts.DrawLogID.Eq(logID)).
+			First()
+
+		if err != nil {
+			ctx.AbortWithError(core.Error(http.StatusNotFound, code.GetDrawReceiptError, "未找到抽奖收据"))
+			return
+		}
+
+		ctx.Payload(&getDrawReceiptResponse{
+			ID:             receipt.ID,
+			DrawLogID:      receipt.DrawLogID,
+			AlgoVersion:    receipt.AlgoVersion,
+			RoundID:        receipt.RoundID,
+			DrawID:         receipt.DrawID,
+			ClientID:       receipt.ClientID,
+			Timestamp:      receipt.Timestamp,
+			ServerSeedHash: receipt.ServerSeedHash,
+			ServerSubSeed:  receipt.ServerSubSeed,
+			ClientSeed:     receipt.ClientSeed,
+			Nonce:          receipt.Nonce,
+			ItemsRoot:      receipt.ItemsRoot,
+			WeightsTotal:   receipt.WeightsTotal,
+			SelectedIndex:  receipt.SelectedIndex,
+			RandProof:      receipt.RandProof,
+			Signature:      receipt.Signature,
+			ItemsSnapshot:  receipt.ItemsSnapshot,
+		})
+	}
+}

internal/api/admin/draw_simulate.go

@@ -0,0 +1,131 @@
+package admin
+
+import (
+    "net/http"
+    "strconv"
+
+    "bindbox-game/internal/code"
+    "bindbox-game/internal/pkg/core"
+    "bindbox-game/internal/pkg/validation"
+)
+
+type simulateDrawRequest struct {
+    Samples int `json:"samples"`
+}
+
+type simulateItemStat struct {
+    RewardID     int64   `json:"reward_id"`
+    Name         string  `json:"name"`
+    Weight       int32   `json:"weight"`
+    Quantity     int64   `json:"quantity"`
+    ExpectedRate float64 `json:"expected_rate"`
+    Count        int64   `json:"count"`
+    ObservedRate float64 `json:"observed_rate"`
+}
+
+type simulateDrawResponse struct {
+    AlgoVersion    string             `json:"algo_version"`
+    IssueID        int64              `json:"issue_id"`
+    ServerSeedHash string             `json:"server_seed_hash"`
+    ItemsRoot      string             `json:"items_root"`
+    WeightsTotal   int64              `json:"weights_total"`
+    Samples        int                `json:"samples"`
+    Stats          []simulateItemStat `json:"stats"`
+}
+
+func (h *handler) SimulateIssueDraw() core.HandlerFunc {
+    return func(ctx core.Context) {
+        issueIDStr := ctx.Param("issue_id")
+        if issueIDStr == "" {
+            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ParamBindError, "未传递期ID"))
+            return
+        }
+        if _, err := strconv.ParseInt(issueIDStr, 10, 64); err != nil {
+            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ParamBindError, validation.Error(err)))
+            return
+        }
+        issueID, _ := strconv.ParseInt(issueIDStr, 10, 64)
+
+        var req simulateDrawRequest
+        if err := ctx.ShouldBindJSON(&req); err != nil {
+            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ParamBindError, validation.Error(err)))
+            return
+        }
+        if req.Samples <= 0 {
+            req.Samples = 1000
+        }
+
+        rewards, err := h.activity.ListIssueRewards(ctx.RequestContext(), issueID)
+        if err != nil {
+            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ExecuteDrawError, err.Error()))
+            return
+        }
+        cm, err := h.activity.GetIssueRandomCommit(ctx.RequestContext(), issueID)
+        if err != nil {
+            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.GetIssueRandomCommitError, err.Error()))
+            return
+        }
+        if cm == nil {
+            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.GetIssueRandomCommitError, "未找到承诺"))
+            return
+        }
+
+        counts := make(map[int64]int64)
+        var eligibleTotal int64
+        for _, it := range rewards {
+            if it.Weight > 0 && (it.Quantity == -1 || it.Quantity > 0) {
+                eligibleTotal += int64(it.Weight)
+            }
+        }
+        for i := 0; i < req.Samples; i++ {
+            rec, err := h.activity.ExecuteDraw(ctx.RequestContext(), issueID)
+            if err != nil {
+                ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ExecuteDrawError, err.Error()))
+                return
+            }
+            counts[rec.SelectedItemId]++
+        }
+        stats := make([]simulateItemStat, 0, len(rewards))
+        for _, it := range rewards {
+            var expected float64
+            if eligibleTotal > 0 && it.Weight > 0 && (it.Quantity == -1 || it.Quantity > 0) {
+                expected = float64(it.Weight) / float64(eligibleTotal)
+            }
+            c := counts[it.ID]
+            var observed float64
+            if req.Samples > 0 {
+                observed = float64(c) / float64(req.Samples)
+            }
+            stats = append(stats, simulateItemStat{
+                RewardID:     it.ID,
+                Name:         it.Name,
+                Weight:       it.Weight,
+                Quantity:     it.Quantity,
+                ExpectedRate: expected,
+                Count:        c,
+                ObservedRate: observed,
+            })
+        }
+        ctx.Payload(&simulateDrawResponse{
+            AlgoVersion:    cm.AlgoVersion,
+            IssueID:        cm.IssueID,
+            ServerSeedHash: hexStr2(cm.ServerSeedHash[:]),
+            ItemsRoot:      hexStr2(cm.ItemsRoot[:]),
+            WeightsTotal:   cm.WeightsTotal,
+            Samples:        req.Samples,
+            Stats:          stats,
+        })
+    }
+}
+
+func hexStr2(b []byte) string {
+    const hextable = "0123456789abcdef"
+    dst := make([]byte, len(b)*2)
+    j := 0
+    for _, v := range b {
+        dst[j] = hextable[v>>4]
+        dst[j+1] = hextable[v&0x0f]
+        j += 2
+    }
+    return string(dst)
+}

internal/api/admin/draw_verify_helper.go

@@ -0,0 +1,88 @@
+package admin
+
+import (
+    "crypto/hmac"
+    "crypto/sha256"
+    "encoding/binary"
+    "encoding/hex"
+
+    "bindbox-game/configs"
+)
+
+func unmaskSeed(enc []byte, issueID int64, version int32) []byte {
+    key := masterKey()
+    if key == nil {
+        return enc
+    }
+    ks := deriveMask(key, issueID, version)
+    out := make([]byte, len(enc))
+    for i := range enc {
+        out[i] = enc[i] ^ ks[i%len(ks)]
+    }
+    return out
+}
+
+func masterKey() []byte {
+    s := configs.Get().Random.CommitMasterKey
+    if s == "" {
+        return nil
+    }
+    b, err := hex.DecodeString(s)
+    if err != nil || len(b) == 0 {
+        return nil
+    }
+    return b
+}
+
+func deriveMask(key []byte, issueID int64, version int32) []byte {
+    m := hmac.New(sha256.New, key)
+    buf := make([]byte, 12)
+    binary.BigEndian.PutUint64(buf[:8], uint64(issueID))
+    binary.BigEndian.PutUint32(buf[8:12], uint32(version))
+    m.Write(buf)
+    sum := m.Sum(nil)
+    return sum[:32]
+}
+
+func encodeMessage(algo string, roundId int64, drawId int64, clientId int64, clientSeed []byte, nonce uint64, itemsRoot []byte, weightsTotal uint64) []byte {
+    var buf []byte
+    buf = appendUint32String(buf, algo)
+    buf = appendUint64(buf, uint64(roundId))
+    buf = appendUint64(buf, uint64(drawId))
+    buf = appendUint64(buf, uint64(clientId))
+    buf = appendUint32Bytes(buf, clientSeed)
+    buf = appendUint64(buf, nonce)
+    buf = append(buf, itemsRoot...)
+    buf = appendUint64(buf, weightsTotal)
+    return buf
+}
+
+func appendUint32String(b []byte, s string) []byte {
+    bs := []byte(s)
+    nb := make([]byte, 4)
+    binary.BigEndian.PutUint32(nb, uint32(len(bs)))
+    b = append(b, nb...)
+    b = append(b, bs...)
+    return b
+}
+
+func appendUint32Bytes(b []byte, bs []byte) []byte {
+    nb := make([]byte, 4)
+    binary.BigEndian.PutUint32(nb, uint32(len(bs)))
+    b = append(b, nb...)
+    b = append(b, bs...)
+    return b
+}
+
+func appendUint64(b []byte, v uint64) []byte {
+    nb := make([]byte, 8)
+    binary.BigEndian.PutUint64(nb, v)
+    b = append(b, nb...)
+    return b
+}
+
+func hmacSha256(key []byte, msg []byte) []byte {
+    m := hmac.New(sha256.New, key)
+    m.Write(msg)
+    return m.Sum(nil)
+}

internal/api/admin/issue_random_commit.go

@@ -0,0 +1,124 @@
+package admin
+
+import (
+    "net/http"
+    "strconv"
+
+    "bindbox-game/internal/code"
+    "bindbox-game/internal/pkg/core"
+    "bindbox-game/internal/pkg/validation"
+)
+
+type issueCommitResponse struct {
+    AlgoVersion    string `json:"algo_version"`
+    IssueID        int64  `json:"issue_id"`
+    ServerSeedHash string `json:"server_seed_hash"`
+    ItemsRoot      string `json:"items_root"`
+    WeightsTotal   int64  `json:"weights_total"`
+    StateVersion   int32  `json:"state_version"`
+}
+
+func (h *handler) CommitIssueRandom() core.HandlerFunc {
+    return func(ctx core.Context) {
+        issueIDStr := ctx.Param("issue_id")
+        if issueIDStr == "" {
+            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ParamBindError, "未传递期ID"))
+            return
+        }
+        if _, err := strconv.ParseInt(issueIDStr, 10, 64); err != nil {
+            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ParamBindError, validation.Error(err)))
+            return
+        }
+        issueID, _ := strconv.ParseInt(issueIDStr, 10, 64)
+        cm, err := h.activity.CommitIssueRandom(ctx.RequestContext(), issueID)
+        if err != nil {
+            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.CommitIssueRandomError, err.Error()))
+            return
+        }
+        ctx.Payload(&issueCommitResponse{
+            AlgoVersion:    cm.AlgoVersion,
+            IssueID:        cm.IssueID,
+            ServerSeedHash: hexStr(cm.ServerSeedHash[:]),
+            ItemsRoot:      hexStr(cm.ItemsRoot[:]),
+            WeightsTotal:   cm.WeightsTotal,
+        })
+    }
+}
+
+func (h *handler) GetIssueRandomCommit() core.HandlerFunc {
+    return func(ctx core.Context) {
+        issueIDStr := ctx.Param("issue_id")
+        if issueIDStr == "" {
+            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ParamBindError, "未传递期ID"))
+            return
+        }
+        if _, err := strconv.ParseInt(issueIDStr, 10, 64); err != nil {
+            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ParamBindError, validation.Error(err)))
+            return
+        }
+        issueID, _ := strconv.ParseInt(issueIDStr, 10, 64)
+        cm, err := h.activity.GetIssueRandomCommit(ctx.RequestContext(), issueID)
+        if err != nil {
+            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.GetIssueRandomCommitError, err.Error()))
+            return
+        }
+        if cm == nil {
+            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.GetIssueRandomCommitError, "未找到承诺"))
+            return
+        }
+        ctx.Payload(&issueCommitResponse{
+            AlgoVersion:    cm.AlgoVersion,
+            IssueID:        cm.IssueID,
+            ServerSeedHash: hexStr(cm.ServerSeedHash[:]),
+            ItemsRoot:      hexStr(cm.ItemsRoot[:]),
+            WeightsTotal:   cm.WeightsTotal,
+            StateVersion:   cm.StateVersion,
+        })
+    }
+}
+
+func (h *handler) GetIssueRandomCommitHistory() core.HandlerFunc {
+    return func(ctx core.Context) {
+        issueIDStr := ctx.Param("issue_id")
+        if issueIDStr == "" {
+            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ParamBindError, "未传递期ID"))
+            return
+        }
+        if _, err := strconv.ParseInt(issueIDStr, 10, 64); err != nil {
+            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ParamBindError, validation.Error(err)))
+            return
+        }
+        issueID, _ := strconv.ParseInt(issueIDStr, 10, 64)
+        history, err := h.activity.GetIssueRandomCommitHistory(ctx.RequestContext(), issueID)
+        if err != nil {
+            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.GetIssueRandomCommitError, err.Error()))
+            return
+        }
+        
+        // 转换响应格式
+        response := make([]*issueCommitResponse, 0, len(history))
+        for _, commit := range history {
+            response = append(response, &issueCommitResponse{
+                AlgoVersion:    commit.AlgoVersion,
+                IssueID:        commit.IssueID,
+                ServerSeedHash: hexStr(commit.ServerSeedHash[:]),
+                ItemsRoot:      hexStr(commit.ItemsRoot[:]),
+                WeightsTotal:   commit.WeightsTotal,
+                StateVersion:   commit.StateVersion,
+            })
+        }
+        ctx.Payload(response)
+    }
+}
+
+func hexStr(b []byte) string {
+    const hextable = "0123456789abcdef"
+    dst := make([]byte, len(b)*2)
+    j := 0
+    for _, v := range b {
+        dst[j] = hextable[v>>4]
+        dst[j+1] = hextable[v&0x0f]
+        j += 2
+    }
+    return string(dst)
+}

internal/api/admin/verify_draw.go

@@ -0,0 +1,140 @@
+package admin
+
+import (
+    "crypto/hmac"
+    "crypto/sha256"
+    "encoding/binary"
+    "encoding/hex"
+    "net/http"
+
+    "bindbox-game/internal/code"
+    "bindbox-game/internal/pkg/core"
+    "bindbox-game/internal/pkg/validation"
+)
+
+type verifyDrawRequest struct {
+    AlgoVersion    string `json:"algo_version" binding:"required"`
+    IssueID        int64  `json:"issue_id" binding:"required"`
+    DrawID         int64  `json:"draw_id" binding:"required"`
+    ClientSeed     string `json:"client_seed" binding:"required"`
+    ServerSeedHash string `json:"server_seed_hash" binding:"required"`
+    ItemsRoot      string `json:"items_root" binding:"required"`
+    WeightsTotal   uint64 `json:"weights_total" binding:"required"`
+    SelectedIndex  int    `json:"selected_index" binding:"required,min=0"`
+    RandProof      string `json:"rand_proof" binding:"required"`
+}
+
+type verifyDrawResponse struct {
+    Valid     bool   `json:"valid"`
+    Message   string `json:"message"`
+    ServerSeedHashExpected string `json:"server_seed_hash_expected,omitempty"`
+    ItemsRootExpected      string `json:"items_root_expected,omitempty"`
+}
+
+func (h *handler) VerifyDrawReceipt() core.HandlerFunc {
+    return func(ctx core.Context) {
+        var req verifyDrawRequest
+        if err := ctx.ShouldBindJSON(&req); err != nil {
+            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ParamBindError, validation.Error(err)))
+            return
+        }
+        cm, err := h.activity.GetIssueRandomCommit(ctx.RequestContext(), req.IssueID)
+        if err != nil {
+            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.GetIssueRandomCommitError, err.Error()))
+            return
+        }
+        if cm == nil {
+            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.GetIssueRandomCommitError, "未找到承诺"))
+            return
+        }
+        serverSeedHashBytes := cm.ServerSeedHash[:]
+        itemsRootBytes := cm.ItemsRoot[:]
+        if hex.EncodeToString(serverSeedHashBytes) != req.ServerSeedHash {
+            ctx.Payload(&verifyDrawResponse{
+                Valid:   false,
+                Message: "server_seed_hash 不匹配",
+                ServerSeedHashExpected: hex.EncodeToString(serverSeedHashBytes),
+            })
+            return
+        }
+        if hex.EncodeToString(itemsRootBytes) != req.ItemsRoot {
+            ctx.Payload(&verifyDrawResponse{
+                Valid:   false,
+                Message: "items_root 不匹配",
+                ItemsRootExpected: hex.EncodeToString(itemsRootBytes),
+            })
+            return
+        }
+        rewards, err := h.activity.ListIssueRewards(ctx.RequestContext(), req.IssueID)
+        if err != nil {
+            ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ListIssueRewardsError, err.Error()))
+            return
+        }
+        if req.SelectedIndex >= len(rewards) {
+            ctx.Payload(&verifyDrawResponse{
+                Valid:   false,
+                Message: "selected_index 超出奖励范围",
+            })
+            return
+        }
+        sel := rewards[req.SelectedIndex]
+        if sel.Weight <= 0 || (sel.Quantity != -1 && sel.Quantity <= 0) {
+            ctx.Payload(&verifyDrawResponse{
+                Valid:   false,
+                Message: "selected_index 对应奖励不可抽",
+            })
+            return
+        }
+        proofBytes, err := hex.DecodeString(req.RandProof)
+        if err != nil {
+            ctx.Payload(&verifyDrawResponse{
+                Valid:   false,
+                Message: "rand_proof 格式错误",
+            })
+            return
+        }
+        clientSeedBytes, err := hex.DecodeString(req.ClientSeed)
+        if err != nil {
+            ctx.Payload(&verifyDrawResponse{
+                Valid:   false,
+                Message: "client_seed 格式错误",
+            })
+            return
+        }
+        master := unmaskSeed(cm.ServerSeedMaster, cm.IssueID, cm.StateVersion)
+        subInput := make([]byte, 16)
+        binary.BigEndian.PutUint64(subInput[:8], uint64(req.IssueID))
+        binary.BigEndian.PutUint64(subInput[8:], uint64(req.DrawID))
+        mac := hmac.New(sha256.New, master)
+        mac.Write(subInput)
+        serverSubSeed := mac.Sum(nil)
+        enc := encodeMessage(req.AlgoVersion, req.IssueID, req.DrawID, 0, clientSeedBytes, 1, itemsRootBytes, req.WeightsTotal)
+        entropy := hmacSha256(serverSubSeed, enc)
+        var final []byte
+        {
+            W := req.WeightsTotal
+            var counter uint64
+            for {
+                R := binary.BigEndian.Uint64(entropy[:8])
+                M := (uint64(^uint64(0)) / W) * W
+                if R < M {
+                    final = entropy
+                    break
+                }
+                counter++
+                cenc := make([]byte, len(enc)+8)
+                copy(cenc, enc)
+                binary.BigEndian.PutUint64(cenc[len(enc):], counter)
+                entropy = hmacSha256(serverSubSeed, cenc)
+            }
+        }
+        if !hmac.Equal(final, proofBytes) {
+            ctx.Payload(&verifyDrawResponse{
+                Valid:   false,
+                Message: "rand_proof 验证失败",
+            })
+            return
+        }
+        ctx.Payload(&verifyDrawResponse{Valid: true, Message: "验证通过"})
+    }
+}

internal/code/code.go

@@ -15,11 +15,11 @@ type Failure struct {
 	Message string `json:"message"` // 描述信息
 }
 
-const (
+	const (
-	ServerError        = 10101
+		ServerError        = 10101
-	ParamBindError     = 10102
+		ParamBindError     = 10102
-	JWTAuthVerifyError = 10103
+		JWTAuthVerifyError = 10103
-	UploadError        = 10104
+		UploadError        = 10104
 
 	AdminLoginError    = 20101
 	CreateAppError     = 20201
@@ -69,8 +69,14 @@ const (
 	DeleteActivityIssueError = 20509
 	CreateIssueRewardsError  = 20510
 	ListIssueRewardsError    = 20511
-	ListDrawLogsError        = 20512
+		ListDrawLogsError        = 20512
-)
+		ExecuteDrawError         = 20513
+		CommitIssueRandomError   = 20514
+		GetIssueRandomCommitError= 20515
+		CreateUserError          = 20516
+		DeleteUserError          = 20517
+		GetDrawReceiptError      = 20518
+	)
 
 const (
 	CreateGuildError      = 20601

internal/code/zh-cn.go

@@ -41,8 +41,12 @@ var zhCNText = map[int]string{
 	ModifyActivityIssueError: "修改活动期数失败",
 	DeleteActivityIssueError: "删除活动期数失败",
 	CreateIssueRewardsError:  "创建期数奖品失败",
-	ListIssueRewardsError:    "获取期数奖品失败",
+		ListIssueRewardsError:    "获取期数奖品失败",
-	ListDrawLogsError:        "获取抽奖记录失败",
+		ListDrawLogsError:        "获取抽奖记录失败",
+		ExecuteDrawError:         "执行抽奖失败",
+		CommitIssueRandomError:   "生成期随机承诺失败",
+			GetIssueRandomCommitError:"获取期随机承诺失败",
+			GetDrawReceiptError:      "获取抽奖收据失败",
 
 	CreateGuildError:      "创建工会失败",
 	ModifyGuildError:      "修改工会失败",

internal/repository/mysql/dao/activity_draw_receipts.gen.go

@@ -0,0 +1,388 @@
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+
+package dao
+
+import (
+	"context"
+
+	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
+	"gorm.io/gorm/schema"
+
+	"gorm.io/gen"
+	"gorm.io/gen/field"
+
+	"gorm.io/plugin/dbresolver"
+
+	"bindbox-game/internal/repository/mysql/model"
+)
+
+func newActivityDrawReceipts(db *gorm.DB, opts ...gen.DOOption) activityDrawReceipts {
+	_activityDrawReceipts := activityDrawReceipts{}
+
+	_activityDrawReceipts.activityDrawReceiptsDo.UseDB(db, opts...)
+	_activityDrawReceipts.activityDrawReceiptsDo.UseModel(&model.ActivityDrawReceipts{})
+
+	tableName := _activityDrawReceipts.activityDrawReceiptsDo.TableName()
+	_activityDrawReceipts.ALL = field.NewAsterisk(tableName)
+	_activityDrawReceipts.ID = field.NewInt64(tableName, "id")
+	_activityDrawReceipts.CreatedAt = field.NewTime(tableName, "created_at")
+	_activityDrawReceipts.DrawLogID = field.NewInt64(tableName, "draw_log_id")
+	_activityDrawReceipts.AlgoVersion = field.NewString(tableName, "algo_version")
+	_activityDrawReceipts.RoundID = field.NewInt64(tableName, "round_id")
+	_activityDrawReceipts.DrawID = field.NewInt64(tableName, "draw_id")
+	_activityDrawReceipts.ClientID = field.NewInt64(tableName, "client_id")
+	_activityDrawReceipts.Timestamp = field.NewInt64(tableName, "timestamp")
+	_activityDrawReceipts.ServerSeedHash = field.NewString(tableName, "server_seed_hash")
+	_activityDrawReceipts.ServerSubSeed = field.NewString(tableName, "server_sub_seed")
+	_activityDrawReceipts.ClientSeed = field.NewString(tableName, "client_seed")
+	_activityDrawReceipts.Nonce = field.NewInt64(tableName, "nonce")
+	_activityDrawReceipts.ItemsRoot = field.NewString(tableName, "items_root")
+	_activityDrawReceipts.WeightsTotal = field.NewInt64(tableName, "weights_total")
+	_activityDrawReceipts.SelectedIndex = field.NewInt32(tableName, "selected_index")
+	_activityDrawReceipts.RandProof = field.NewString(tableName, "rand_proof")
+	_activityDrawReceipts.Signature = field.NewString(tableName, "signature")
+	_activityDrawReceipts.ItemsSnapshot = field.NewString(tableName, "items_snapshot")
+
+	_activityDrawReceipts.fillFieldMap()
+
+	return _activityDrawReceipts
+}
+
+// activityDrawReceipts 活动抽奖凭据表
+type activityDrawReceipts struct {
+	activityDrawReceiptsDo
+
+	ALL            field.Asterisk
+	ID             field.Int64  // 主键ID
+	CreatedAt      field.Time   // 创建时间
+	DrawLogID      field.Int64  // 抽奖日志ID（activity_draw_logs.id）
+	AlgoVersion    field.String // 算法版本
+	RoundID        field.Int64  // 期ID
+	DrawID         field.Int64  // 抽奖ID
+	ClientID       field.Int64  // 客户端ID
+	Timestamp      field.Int64  // 时间戳（毫秒）
+	ServerSeedHash field.String // 服务器种子哈希（十六进制）
+	ServerSubSeed  field.String // 服务器子种子（十六进制）
+	ClientSeed     field.String // 客户端种子（十六进制）
+	Nonce          field.Int64  // 随机数
+	ItemsRoot      field.String // 项目根哈希（十六进制）
+	WeightsTotal   field.Int64  // 权重总和
+	SelectedIndex  field.Int32  // 选中索引
+	RandProof      field.String // 随机证明（十六进制）
+	Signature      field.String // 签名（十六进制，可选）
+	ItemsSnapshot  field.String // 项目快照（JSON格式）
+
+	fieldMap map[string]field.Expr
+}
+
+func (a activityDrawReceipts) Table(newTableName string) *activityDrawReceipts {
+	a.activityDrawReceiptsDo.UseTable(newTableName)
+	return a.updateTableName(newTableName)
+}
+
+func (a activityDrawReceipts) As(alias string) *activityDrawReceipts {
+	a.activityDrawReceiptsDo.DO = *(a.activityDrawReceiptsDo.As(alias).(*gen.DO))
+	return a.updateTableName(alias)
+}
+
+func (a *activityDrawReceipts) updateTableName(table string) *activityDrawReceipts {
+	a.ALL = field.NewAsterisk(table)
+	a.ID = field.NewInt64(table, "id")
+	a.CreatedAt = field.NewTime(table, "created_at")
+	a.DrawLogID = field.NewInt64(table, "draw_log_id")
+	a.AlgoVersion = field.NewString(table, "algo_version")
+	a.RoundID = field.NewInt64(table, "round_id")
+	a.DrawID = field.NewInt64(table, "draw_id")
+	a.ClientID = field.NewInt64(table, "client_id")
+	a.Timestamp = field.NewInt64(table, "timestamp")
+	a.ServerSeedHash = field.NewString(table, "server_seed_hash")
+	a.ServerSubSeed = field.NewString(table, "server_sub_seed")
+	a.ClientSeed = field.NewString(table, "client_seed")
+	a.Nonce = field.NewInt64(table, "nonce")
+	a.ItemsRoot = field.NewString(table, "items_root")
+	a.WeightsTotal = field.NewInt64(table, "weights_total")
+	a.SelectedIndex = field.NewInt32(table, "selected_index")
+	a.RandProof = field.NewString(table, "rand_proof")
+	a.Signature = field.NewString(table, "signature")
+	a.ItemsSnapshot = field.NewString(table, "items_snapshot")
+
+	a.fillFieldMap()
+
+	return a
+}
+
+func (a *activityDrawReceipts) GetFieldByName(fieldName string) (field.OrderExpr, bool) {
+	_f, ok := a.fieldMap[fieldName]
+	if !ok || _f == nil {
+		return nil, false
+	}
+	_oe, ok := _f.(field.OrderExpr)
+	return _oe, ok
+}
+
+func (a *activityDrawReceipts) fillFieldMap() {
+	a.fieldMap = make(map[string]field.Expr, 18)
+	a.fieldMap["id"] = a.ID
+	a.fieldMap["created_at"] = a.CreatedAt
+	a.fieldMap["draw_log_id"] = a.DrawLogID
+	a.fieldMap["algo_version"] = a.AlgoVersion
+	a.fieldMap["round_id"] = a.RoundID
+	a.fieldMap["draw_id"] = a.DrawID
+	a.fieldMap["client_id"] = a.ClientID
+	a.fieldMap["timestamp"] = a.Timestamp
+	a.fieldMap["server_seed_hash"] = a.ServerSeedHash
+	a.fieldMap["server_sub_seed"] = a.ServerSubSeed
+	a.fieldMap["client_seed"] = a.ClientSeed
+	a.fieldMap["nonce"] = a.Nonce
+	a.fieldMap["items_root"] = a.ItemsRoot
+	a.fieldMap["weights_total"] = a.WeightsTotal
+	a.fieldMap["selected_index"] = a.SelectedIndex
+	a.fieldMap["rand_proof"] = a.RandProof
+	a.fieldMap["signature"] = a.Signature
+	a.fieldMap["items_snapshot"] = a.ItemsSnapshot
+}
+
+func (a activityDrawReceipts) clone(db *gorm.DB) activityDrawReceipts {
+	a.activityDrawReceiptsDo.ReplaceConnPool(db.Statement.ConnPool)
+	return a
+}
+
+func (a activityDrawReceipts) replaceDB(db *gorm.DB) activityDrawReceipts {
+	a.activityDrawReceiptsDo.ReplaceDB(db)
+	return a
+}
+
+type activityDrawReceiptsDo struct{ gen.DO }
+
+func (a activityDrawReceiptsDo) Debug() *activityDrawReceiptsDo {
+	return a.withDO(a.DO.Debug())
+}
+
+func (a activityDrawReceiptsDo) WithContext(ctx context.Context) *activityDrawReceiptsDo {
+	return a.withDO(a.DO.WithContext(ctx))
+}
+
+func (a activityDrawReceiptsDo) ReadDB() *activityDrawReceiptsDo {
+	return a.Clauses(dbresolver.Read)
+}
+
+func (a activityDrawReceiptsDo) WriteDB() *activityDrawReceiptsDo {
+	return a.Clauses(dbresolver.Write)
+}
+
+func (a activityDrawReceiptsDo) Session(config *gorm.Session) *activityDrawReceiptsDo {
+	return a.withDO(a.DO.Session(config))
+}
+
+func (a activityDrawReceiptsDo) Clauses(conds ...clause.Expression) *activityDrawReceiptsDo {
+	return a.withDO(a.DO.Clauses(conds...))
+}
+
+func (a activityDrawReceiptsDo) Returning(value interface{}, columns ...string) *activityDrawReceiptsDo {
+	return a.withDO(a.DO.Returning(value, columns...))
+}
+
+func (a activityDrawReceiptsDo) Not(conds ...gen.Condition) *activityDrawReceiptsDo {
+	return a.withDO(a.DO.Not(conds...))
+}
+
+func (a activityDrawReceiptsDo) Or(conds ...gen.Condition) *activityDrawReceiptsDo {
+	return a.withDO(a.DO.Or(conds...))
+}
+
+func (a activityDrawReceiptsDo) Select(conds ...field.Expr) *activityDrawReceiptsDo {
+	return a.withDO(a.DO.Select(conds...))
+}
+
+func (a activityDrawReceiptsDo) Where(conds ...gen.Condition) *activityDrawReceiptsDo {
+	return a.withDO(a.DO.Where(conds...))
+}
+
+func (a activityDrawReceiptsDo) Order(conds ...field.Expr) *activityDrawReceiptsDo {
+	return a.withDO(a.DO.Order(conds...))
+}
+
+func (a activityDrawReceiptsDo) Distinct(cols ...field.Expr) *activityDrawReceiptsDo {
+	return a.withDO(a.DO.Distinct(cols...))
+}
+
+func (a activityDrawReceiptsDo) Omit(cols ...field.Expr) *activityDrawReceiptsDo {
+	return a.withDO(a.DO.Omit(cols...))
+}
+
+func (a activityDrawReceiptsDo) Join(table schema.Tabler, on ...field.Expr) *activityDrawReceiptsDo {
+	return a.withDO(a.DO.Join(table, on...))
+}
+
+func (a activityDrawReceiptsDo) LeftJoin(table schema.Tabler, on ...field.Expr) *activityDrawReceiptsDo {
+	return a.withDO(a.DO.LeftJoin(table, on...))
+}
+
+func (a activityDrawReceiptsDo) RightJoin(table schema.Tabler, on ...field.Expr) *activityDrawReceiptsDo {
+	return a.withDO(a.DO.RightJoin(table, on...))
+}
+
+func (a activityDrawReceiptsDo) Group(cols ...field.Expr) *activityDrawReceiptsDo {
+	return a.withDO(a.DO.Group(cols...))
+}
+
+func (a activityDrawReceiptsDo) Having(conds ...gen.Condition) *activityDrawReceiptsDo {
+	return a.withDO(a.DO.Having(conds...))
+}
+
+func (a activityDrawReceiptsDo) Limit(limit int) *activityDrawReceiptsDo {
+	return a.withDO(a.DO.Limit(limit))
+}
+
+func (a activityDrawReceiptsDo) Offset(offset int) *activityDrawReceiptsDo {
+	return a.withDO(a.DO.Offset(offset))
+}
+
+func (a activityDrawReceiptsDo) Scopes(funcs ...func(gen.Dao) gen.Dao) *activityDrawReceiptsDo {
+	return a.withDO(a.DO.Scopes(funcs...))
+}
+
+func (a activityDrawReceiptsDo) Unscoped() *activityDrawReceiptsDo {
+	return a.withDO(a.DO.Unscoped())
+}
+
+func (a activityDrawReceiptsDo) Create(values ...*model.ActivityDrawReceipts) error {
+	if len(values) == 0 {
+		return nil
+	}
+	return a.DO.Create(values)
+}
+
+func (a activityDrawReceiptsDo) CreateInBatches(values []*model.ActivityDrawReceipts, batchSize int) error {
+	return a.DO.CreateInBatches(values, batchSize)
+}
+
+// Save : !!! underlying implementation is different with GORM
+// The method is equivalent to executing the statement: db.Clauses(clause.OnConflict{UpdateAll: true}).Create(values)
+func (a activityDrawReceiptsDo) Save(values ...*model.ActivityDrawReceipts) error {
+	if len(values) == 0 {
+		return nil
+	}
+	return a.DO.Save(values)
+}
+
+func (a activityDrawReceiptsDo) First() (*model.ActivityDrawReceipts, error) {
+	if result, err := a.DO.First(); err != nil {
+		return nil, err
+	} else {
+		return result.(*model.ActivityDrawReceipts), nil
+	}
+}
+
+func (a activityDrawReceiptsDo) Take() (*model.ActivityDrawReceipts, error) {
+	if result, err := a.DO.Take(); err != nil {
+		return nil, err
+	} else {
+		return result.(*model.ActivityDrawReceipts), nil
+	}
+}
+
+func (a activityDrawReceiptsDo) Last() (*model.ActivityDrawReceipts, error) {
+	if result, err := a.DO.Last(); err != nil {
+		return nil, err
+	} else {
+		return result.(*model.ActivityDrawReceipts), nil
+	}
+}
+
+func (a activityDrawReceiptsDo) Find() ([]*model.ActivityDrawReceipts, error) {
+	result, err := a.DO.Find()
+	return result.([]*model.ActivityDrawReceipts), err
+}
+
+func (a activityDrawReceiptsDo) FindInBatch(batchSize int, fc func(tx gen.Dao, batch int) error) (results []*model.ActivityDrawReceipts, err error) {
+	buf := make([]*model.ActivityDrawReceipts, 0, batchSize)
+	err = a.DO.FindInBatches(&buf, batchSize, func(tx gen.Dao, batch int) error {
+		defer func() { results = append(results, buf...) }()
+		return fc(tx, batch)
+	})
+	return results, err
+}
+
+func (a activityDrawReceiptsDo) FindInBatches(result *[]*model.ActivityDrawReceipts, batchSize int, fc func(tx gen.Dao, batch int) error) error {
+	return a.DO.FindInBatches(result, batchSize, fc)
+}
+
+func (a activityDrawReceiptsDo) Attrs(attrs ...field.AssignExpr) *activityDrawReceiptsDo {
+	return a.withDO(a.DO.Attrs(attrs...))
+}
+
+func (a activityDrawReceiptsDo) Assign(attrs ...field.AssignExpr) *activityDrawReceiptsDo {
+	return a.withDO(a.DO.Assign(attrs...))
+}
+
+func (a activityDrawReceiptsDo) Joins(fields ...field.RelationField) *activityDrawReceiptsDo {
+	for _, _f := range fields {
+		a = *a.withDO(a.DO.Joins(_f))
+	}
+	return &a
+}
+
+func (a activityDrawReceiptsDo) Preload(fields ...field.RelationField) *activityDrawReceiptsDo {
+	for _, _f := range fields {
+		a = *a.withDO(a.DO.Preload(_f))
+	}
+	return &a
+}
+
+func (a activityDrawReceiptsDo) FirstOrInit() (*model.ActivityDrawReceipts, error) {
+	if result, err := a.DO.FirstOrInit(); err != nil {
+		return nil, err
+	} else {
+		return result.(*model.ActivityDrawReceipts), nil
+	}
+}
+
+func (a activityDrawReceiptsDo) FirstOrCreate() (*model.ActivityDrawReceipts, error) {
+	if result, err := a.DO.FirstOrCreate(); err != nil {
+		return nil, err
+	} else {
+		return result.(*model.ActivityDrawReceipts), nil
+	}
+}
+
+func (a activityDrawReceiptsDo) FindByPage(offset int, limit int) (result []*model.ActivityDrawReceipts, count int64, err error) {
+	result, err = a.Offset(offset).Limit(limit).Find()
+	if err != nil {
+		return
+	}
+
+	if size := len(result); 0 < limit && 0 < size && size < limit {
+		count = int64(size + offset)
+		return
+	}
+
+	count, err = a.Offset(-1).Limit(-1).Count()
+	return
+}
+
+func (a activityDrawReceiptsDo) ScanByPage(result interface{}, offset int, limit int) (count int64, err error) {
+	count, err = a.Count()
+	if err != nil {
+		return
+	}
+
+	err = a.Offset(offset).Limit(limit).Scan(result)
+	return
+}
+
+func (a activityDrawReceiptsDo) Scan(result interface{}) (err error) {
+	return a.DO.Scan(result)
+}
+
+func (a activityDrawReceiptsDo) Delete(models ...*model.ActivityDrawReceipts) (result gen.ResultInfo, err error) {
+	return a.DO.Delete(models)
+}
+
+func (a *activityDrawReceiptsDo) withDO(do gen.Dao) *activityDrawReceiptsDo {
+	a.DO = *do.(*gen.DO)
+	return a
+}

internal/repository/mysql/dao/gen.go

@@ -21,6 +21,7 @@ var (
 	ActivityCategories     *activityCategories
 	ActivityDrawEffects    *activityDrawEffects
 	ActivityDrawLogs       *activityDrawLogs
+	ActivityDrawReceipts   *activityDrawReceipts
 	ActivityIssues         *activityIssues
 	ActivityRewardSettings *activityRewardSettings
 	Admin                  *admin
@@ -29,6 +30,7 @@ var (
 	GuildBoxes             *guildBoxes
 	GuildContributeLogs    *guildContributeLogs
 	GuildMembers           *guildMembers
+	IssueRandomCommitments *issueRandomCommitments
 	LogOperation           *logOperation
 	LogRequest             *logRequest
 	MenuActions            *menuActions
@@ -61,6 +63,7 @@ func SetDefault(db *gorm.DB, opts ...gen.DOOption) {
 	ActivityCategories = &Q.ActivityCategories
 	ActivityDrawEffects = &Q.ActivityDrawEffects
 	ActivityDrawLogs = &Q.ActivityDrawLogs
+	ActivityDrawReceipts = &Q.ActivityDrawReceipts
 	ActivityIssues = &Q.ActivityIssues
 	ActivityRewardSettings = &Q.ActivityRewardSettings
 	Admin = &Q.Admin
@@ -69,6 +72,7 @@ func SetDefault(db *gorm.DB, opts ...gen.DOOption) {
 	GuildBoxes = &Q.GuildBoxes
 	GuildContributeLogs = &Q.GuildContributeLogs
 	GuildMembers = &Q.GuildMembers
+	IssueRandomCommitments = &Q.IssueRandomCommitments
 	LogOperation = &Q.LogOperation
 	LogRequest = &Q.LogRequest
 	MenuActions = &Q.MenuActions
@@ -102,6 +106,7 @@ func Use(db *gorm.DB, opts ...gen.DOOption) *Query {
 		ActivityCategories:     newActivityCategories(db, opts...),
 		ActivityDrawEffects:    newActivityDrawEffects(db, opts...),
 		ActivityDrawLogs:       newActivityDrawLogs(db, opts...),
+		ActivityDrawReceipts:   newActivityDrawReceipts(db, opts...),
 		ActivityIssues:         newActivityIssues(db, opts...),
 		ActivityRewardSettings: newActivityRewardSettings(db, opts...),
 		Admin:                  newAdmin(db, opts...),
@@ -110,6 +115,7 @@ func Use(db *gorm.DB, opts ...gen.DOOption) *Query {
 		GuildBoxes:             newGuildBoxes(db, opts...),
 		GuildContributeLogs:    newGuildContributeLogs(db, opts...),
 		GuildMembers:           newGuildMembers(db, opts...),
+		IssueRandomCommitments: newIssueRandomCommitments(db, opts...),
 		LogOperation:           newLogOperation(db, opts...),
 		LogRequest:             newLogRequest(db, opts...),
 		MenuActions:            newMenuActions(db, opts...),
@@ -144,6 +150,7 @@ type Query struct {
 	ActivityCategories     activityCategories
 	ActivityDrawEffects    activityDrawEffects
 	ActivityDrawLogs       activityDrawLogs
+	ActivityDrawReceipts   activityDrawReceipts
 	ActivityIssues         activityIssues
 	ActivityRewardSettings activityRewardSettings
 	Admin                  admin
@@ -152,6 +159,7 @@ type Query struct {
 	GuildBoxes             guildBoxes
 	GuildContributeLogs    guildContributeLogs
 	GuildMembers           guildMembers
+	IssueRandomCommitments issueRandomCommitments
 	LogOperation           logOperation
 	LogRequest             logRequest
 	MenuActions            menuActions
@@ -187,6 +195,7 @@ func (q *Query) clone(db *gorm.DB) *Query {
 		ActivityCategories:     q.ActivityCategories.clone(db),
 		ActivityDrawEffects:    q.ActivityDrawEffects.clone(db),
 		ActivityDrawLogs:       q.ActivityDrawLogs.clone(db),
+		ActivityDrawReceipts:   q.ActivityDrawReceipts.clone(db),
 		ActivityIssues:         q.ActivityIssues.clone(db),
 		ActivityRewardSettings: q.ActivityRewardSettings.clone(db),
 		Admin:                  q.Admin.clone(db),
@@ -195,6 +204,7 @@ func (q *Query) clone(db *gorm.DB) *Query {
 		GuildBoxes:             q.GuildBoxes.clone(db),
 		GuildContributeLogs:    q.GuildContributeLogs.clone(db),
 		GuildMembers:           q.GuildMembers.clone(db),
+		IssueRandomCommitments: q.IssueRandomCommitments.clone(db),
 		LogOperation:           q.LogOperation.clone(db),
 		LogRequest:             q.LogRequest.clone(db),
 		MenuActions:            q.MenuActions.clone(db),
@@ -237,6 +247,7 @@ func (q *Query) ReplaceDB(db *gorm.DB) *Query {
 		ActivityCategories:     q.ActivityCategories.replaceDB(db),
 		ActivityDrawEffects:    q.ActivityDrawEffects.replaceDB(db),
 		ActivityDrawLogs:       q.ActivityDrawLogs.replaceDB(db),
+		ActivityDrawReceipts:   q.ActivityDrawReceipts.replaceDB(db),
 		ActivityIssues:         q.ActivityIssues.replaceDB(db),
 		ActivityRewardSettings: q.ActivityRewardSettings.replaceDB(db),
 		Admin:                  q.Admin.replaceDB(db),
@@ -245,6 +256,7 @@ func (q *Query) ReplaceDB(db *gorm.DB) *Query {
 		GuildBoxes:             q.GuildBoxes.replaceDB(db),
 		GuildContributeLogs:    q.GuildContributeLogs.replaceDB(db),
 		GuildMembers:           q.GuildMembers.replaceDB(db),
+		IssueRandomCommitments: q.IssueRandomCommitments.replaceDB(db),
 		LogOperation:           q.LogOperation.replaceDB(db),
 		LogRequest:             q.LogRequest.replaceDB(db),
 		MenuActions:            q.MenuActions.replaceDB(db),
@@ -277,6 +289,7 @@ type queryCtx struct {
 	ActivityCategories     *activityCategoriesDo
 	ActivityDrawEffects    *activityDrawEffectsDo
 	ActivityDrawLogs       *activityDrawLogsDo
+	ActivityDrawReceipts   *activityDrawReceiptsDo
 	ActivityIssues         *activityIssuesDo
 	ActivityRewardSettings *activityRewardSettingsDo
 	Admin                  *adminDo
@@ -285,6 +298,7 @@ type queryCtx struct {
 	GuildBoxes             *guildBoxesDo
 	GuildContributeLogs    *guildContributeLogsDo
 	GuildMembers           *guildMembersDo
+	IssueRandomCommitments *issueRandomCommitmentsDo
 	LogOperation           *logOperationDo
 	LogRequest             *logRequestDo
 	MenuActions            *menuActionsDo
@@ -317,6 +331,7 @@ func (q *Query) WithContext(ctx context.Context) *queryCtx {
 		ActivityCategories:     q.ActivityCategories.WithContext(ctx),
 		ActivityDrawEffects:    q.ActivityDrawEffects.WithContext(ctx),
 		ActivityDrawLogs:       q.ActivityDrawLogs.WithContext(ctx),
+		ActivityDrawReceipts:   q.ActivityDrawReceipts.WithContext(ctx),
 		ActivityIssues:         q.ActivityIssues.WithContext(ctx),
 		ActivityRewardSettings: q.ActivityRewardSettings.WithContext(ctx),
 		Admin:                  q.Admin.WithContext(ctx),
@@ -325,6 +340,7 @@ func (q *Query) WithContext(ctx context.Context) *queryCtx {
 		GuildBoxes:             q.GuildBoxes.WithContext(ctx),
 		GuildContributeLogs:    q.GuildContributeLogs.WithContext(ctx),
 		GuildMembers:           q.GuildMembers.WithContext(ctx),
+		IssueRandomCommitments: q.IssueRandomCommitments.WithContext(ctx),
 		LogOperation:           q.LogOperation.WithContext(ctx),
 		LogRequest:             q.LogRequest.WithContext(ctx),
 		MenuActions:            q.MenuActions.WithContext(ctx),

internal/repository/mysql/dao/issue_random_commitments.gen.go

@@ -0,0 +1,355 @@
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+
+package dao
+
+import (
+	"context"
+
+	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
+	"gorm.io/gorm/schema"
+
+	"gorm.io/gen"
+	"gorm.io/gen/field"
+
+	"gorm.io/plugin/dbresolver"
+
+	"bindbox-game/internal/repository/mysql/model"
+)
+
+func newIssueRandomCommitments(db *gorm.DB, opts ...gen.DOOption) issueRandomCommitments {
+	_issueRandomCommitments := issueRandomCommitments{}
+
+	_issueRandomCommitments.issueRandomCommitmentsDo.UseDB(db, opts...)
+	_issueRandomCommitments.issueRandomCommitmentsDo.UseModel(&model.IssueRandomCommitments{})
+
+	tableName := _issueRandomCommitments.issueRandomCommitmentsDo.TableName()
+	_issueRandomCommitments.ALL = field.NewAsterisk(tableName)
+	_issueRandomCommitments.ID = field.NewInt64(tableName, "id")
+	_issueRandomCommitments.CreatedAt = field.NewTime(tableName, "created_at")
+	_issueRandomCommitments.UpdatedAt = field.NewTime(tableName, "updated_at")
+	_issueRandomCommitments.IssueID = field.NewInt64(tableName, "issue_id")
+	_issueRandomCommitments.AlgoVersion = field.NewString(tableName, "algo_version")
+	_issueRandomCommitments.ServerSeedMaster = field.NewBytes(tableName, "server_seed_master")
+	_issueRandomCommitments.ServerSeedHash = field.NewBytes(tableName, "server_seed_hash")
+	_issueRandomCommitments.ItemsRoot = field.NewBytes(tableName, "items_root")
+	_issueRandomCommitments.WeightsTotal = field.NewInt64(tableName, "weights_total")
+	_issueRandomCommitments.StateVersion = field.NewInt32(tableName, "state_version")
+
+	_issueRandomCommitments.fillFieldMap()
+
+	return _issueRandomCommitments
+}
+
+type issueRandomCommitments struct {
+	issueRandomCommitmentsDo
+
+	ALL              field.Asterisk
+	ID               field.Int64
+	CreatedAt        field.Time
+	UpdatedAt        field.Time
+	IssueID          field.Int64
+	AlgoVersion      field.String
+	ServerSeedMaster field.Bytes
+	ServerSeedHash   field.Bytes
+	ItemsRoot        field.Bytes
+	WeightsTotal     field.Int64
+	StateVersion     field.Int32
+
+	fieldMap map[string]field.Expr
+}
+
+func (i issueRandomCommitments) Table(newTableName string) *issueRandomCommitments {
+	i.issueRandomCommitmentsDo.UseTable(newTableName)
+	return i.updateTableName(newTableName)
+}
+
+func (i issueRandomCommitments) As(alias string) *issueRandomCommitments {
+	i.issueRandomCommitmentsDo.DO = *(i.issueRandomCommitmentsDo.As(alias).(*gen.DO))
+	return i.updateTableName(alias)
+}
+
+func (i *issueRandomCommitments) updateTableName(table string) *issueRandomCommitments {
+	i.ALL = field.NewAsterisk(table)
+	i.ID = field.NewInt64(table, "id")
+	i.CreatedAt = field.NewTime(table, "created_at")
+	i.UpdatedAt = field.NewTime(table, "updated_at")
+	i.IssueID = field.NewInt64(table, "issue_id")
+	i.AlgoVersion = field.NewString(table, "algo_version")
+	i.ServerSeedMaster = field.NewBytes(table, "server_seed_master")
+	i.ServerSeedHash = field.NewBytes(table, "server_seed_hash")
+	i.ItemsRoot = field.NewBytes(table, "items_root")
+	i.WeightsTotal = field.NewInt64(table, "weights_total")
+	i.StateVersion = field.NewInt32(table, "state_version")
+
+	i.fillFieldMap()
+
+	return i
+}
+
+func (i *issueRandomCommitments) GetFieldByName(fieldName string) (field.OrderExpr, bool) {
+	_f, ok := i.fieldMap[fieldName]
+	if !ok || _f == nil {
+		return nil, false
+	}
+	_oe, ok := _f.(field.OrderExpr)
+	return _oe, ok
+}
+
+func (i *issueRandomCommitments) fillFieldMap() {
+	i.fieldMap = make(map[string]field.Expr, 10)
+	i.fieldMap["id"] = i.ID
+	i.fieldMap["created_at"] = i.CreatedAt
+	i.fieldMap["updated_at"] = i.UpdatedAt
+	i.fieldMap["issue_id"] = i.IssueID
+	i.fieldMap["algo_version"] = i.AlgoVersion
+	i.fieldMap["server_seed_master"] = i.ServerSeedMaster
+	i.fieldMap["server_seed_hash"] = i.ServerSeedHash
+	i.fieldMap["items_root"] = i.ItemsRoot
+	i.fieldMap["weights_total"] = i.WeightsTotal
+	i.fieldMap["state_version"] = i.StateVersion
+}
+
+func (i issueRandomCommitments) clone(db *gorm.DB) issueRandomCommitments {
+	i.issueRandomCommitmentsDo.ReplaceConnPool(db.Statement.ConnPool)
+	return i
+}
+
+func (i issueRandomCommitments) replaceDB(db *gorm.DB) issueRandomCommitments {
+	i.issueRandomCommitmentsDo.ReplaceDB(db)
+	return i
+}
+
+type issueRandomCommitmentsDo struct{ gen.DO }
+
+func (i issueRandomCommitmentsDo) Debug() *issueRandomCommitmentsDo {
+	return i.withDO(i.DO.Debug())
+}
+
+func (i issueRandomCommitmentsDo) WithContext(ctx context.Context) *issueRandomCommitmentsDo {
+	return i.withDO(i.DO.WithContext(ctx))
+}
+
+func (i issueRandomCommitmentsDo) ReadDB() *issueRandomCommitmentsDo {
+	return i.Clauses(dbresolver.Read)
+}
+
+func (i issueRandomCommitmentsDo) WriteDB() *issueRandomCommitmentsDo {
+	return i.Clauses(dbresolver.Write)
+}
+
+func (i issueRandomCommitmentsDo) Session(config *gorm.Session) *issueRandomCommitmentsDo {
+	return i.withDO(i.DO.Session(config))
+}
+
+func (i issueRandomCommitmentsDo) Clauses(conds ...clause.Expression) *issueRandomCommitmentsDo {
+	return i.withDO(i.DO.Clauses(conds...))
+}
+
+func (i issueRandomCommitmentsDo) Returning(value interface{}, columns ...string) *issueRandomCommitmentsDo {
+	return i.withDO(i.DO.Returning(value, columns...))
+}
+
+func (i issueRandomCommitmentsDo) Not(conds ...gen.Condition) *issueRandomCommitmentsDo {
+	return i.withDO(i.DO.Not(conds...))
+}
+
+func (i issueRandomCommitmentsDo) Or(conds ...gen.Condition) *issueRandomCommitmentsDo {
+	return i.withDO(i.DO.Or(conds...))
+}
+
+func (i issueRandomCommitmentsDo) Select(conds ...field.Expr) *issueRandomCommitmentsDo {
+	return i.withDO(i.DO.Select(conds...))
+}
+
+func (i issueRandomCommitmentsDo) Where(conds ...gen.Condition) *issueRandomCommitmentsDo {
+	return i.withDO(i.DO.Where(conds...))
+}
+
+func (i issueRandomCommitmentsDo) Order(conds ...field.Expr) *issueRandomCommitmentsDo {
+	return i.withDO(i.DO.Order(conds...))
+}
+
+func (i issueRandomCommitmentsDo) Distinct(cols ...field.Expr) *issueRandomCommitmentsDo {
+	return i.withDO(i.DO.Distinct(cols...))
+}
+
+func (i issueRandomCommitmentsDo) Omit(cols ...field.Expr) *issueRandomCommitmentsDo {
+	return i.withDO(i.DO.Omit(cols...))
+}
+
+func (i issueRandomCommitmentsDo) Join(table schema.Tabler, on ...field.Expr) *issueRandomCommitmentsDo {
+	return i.withDO(i.DO.Join(table, on...))
+}
+
+func (i issueRandomCommitmentsDo) LeftJoin(table schema.Tabler, on ...field.Expr) *issueRandomCommitmentsDo {
+	return i.withDO(i.DO.LeftJoin(table, on...))
+}
+
+func (i issueRandomCommitmentsDo) RightJoin(table schema.Tabler, on ...field.Expr) *issueRandomCommitmentsDo {
+	return i.withDO(i.DO.RightJoin(table, on...))
+}
+
+func (i issueRandomCommitmentsDo) Group(cols ...field.Expr) *issueRandomCommitmentsDo {
+	return i.withDO(i.DO.Group(cols...))
+}
+
+func (i issueRandomCommitmentsDo) Having(conds ...gen.Condition) *issueRandomCommitmentsDo {
+	return i.withDO(i.DO.Having(conds...))
+}
+
+func (i issueRandomCommitmentsDo) Limit(limit int) *issueRandomCommitmentsDo {
+	return i.withDO(i.DO.Limit(limit))
+}
+
+func (i issueRandomCommitmentsDo) Offset(offset int) *issueRandomCommitmentsDo {
+	return i.withDO(i.DO.Offset(offset))
+}
+
+func (i issueRandomCommitmentsDo) Scopes(funcs ...func(gen.Dao) gen.Dao) *issueRandomCommitmentsDo {
+	return i.withDO(i.DO.Scopes(funcs...))
+}
+
+func (i issueRandomCommitmentsDo) Unscoped() *issueRandomCommitmentsDo {
+	return i.withDO(i.DO.Unscoped())
+}
+
+func (i issueRandomCommitmentsDo) Create(values ...*model.IssueRandomCommitments) error {
+	if len(values) == 0 {
+		return nil
+	}
+	return i.DO.Create(values)
+}
+
+func (i issueRandomCommitmentsDo) CreateInBatches(values []*model.IssueRandomCommitments, batchSize int) error {
+	return i.DO.CreateInBatches(values, batchSize)
+}
+
+// Save : !!! underlying implementation is different with GORM
+// The method is equivalent to executing the statement: db.Clauses(clause.OnConflict{UpdateAll: true}).Create(values)
+func (i issueRandomCommitmentsDo) Save(values ...*model.IssueRandomCommitments) error {
+	if len(values) == 0 {
+		return nil
+	}
+	return i.DO.Save(values)
+}
+
+func (i issueRandomCommitmentsDo) First() (*model.IssueRandomCommitments, error) {
+	if result, err := i.DO.First(); err != nil {
+		return nil, err
+	} else {
+		return result.(*model.IssueRandomCommitments), nil
+	}
+}
+
+func (i issueRandomCommitmentsDo) Take() (*model.IssueRandomCommitments, error) {
+	if result, err := i.DO.Take(); err != nil {
+		return nil, err
+	} else {
+		return result.(*model.IssueRandomCommitments), nil
+	}
+}
+
+func (i issueRandomCommitmentsDo) Last() (*model.IssueRandomCommitments, error) {
+	if result, err := i.DO.Last(); err != nil {
+		return nil, err
+	} else {
+		return result.(*model.IssueRandomCommitments), nil
+	}
+}
+
+func (i issueRandomCommitmentsDo) Find() ([]*model.IssueRandomCommitments, error) {
+	result, err := i.DO.Find()
+	return result.([]*model.IssueRandomCommitments), err
+}
+
+func (i issueRandomCommitmentsDo) FindInBatch(batchSize int, fc func(tx gen.Dao, batch int) error) (results []*model.IssueRandomCommitments, err error) {
+	buf := make([]*model.IssueRandomCommitments, 0, batchSize)
+	err = i.DO.FindInBatches(&buf, batchSize, func(tx gen.Dao, batch int) error {
+		defer func() { results = append(results, buf...) }()
+		return fc(tx, batch)
+	})
+	return results, err
+}
+
+func (i issueRandomCommitmentsDo) FindInBatches(result *[]*model.IssueRandomCommitments, batchSize int, fc func(tx gen.Dao, batch int) error) error {
+	return i.DO.FindInBatches(result, batchSize, fc)
+}
+
+func (i issueRandomCommitmentsDo) Attrs(attrs ...field.AssignExpr) *issueRandomCommitmentsDo {
+	return i.withDO(i.DO.Attrs(attrs...))
+}
+
+func (i issueRandomCommitmentsDo) Assign(attrs ...field.AssignExpr) *issueRandomCommitmentsDo {
+	return i.withDO(i.DO.Assign(attrs...))
+}
+
+func (i issueRandomCommitmentsDo) Joins(fields ...field.RelationField) *issueRandomCommitmentsDo {
+	for _, _f := range fields {
+		i = *i.withDO(i.DO.Joins(_f))
+	}
+	return &i
+}
+
+func (i issueRandomCommitmentsDo) Preload(fields ...field.RelationField) *issueRandomCommitmentsDo {
+	for _, _f := range fields {
+		i = *i.withDO(i.DO.Preload(_f))
+	}
+	return &i
+}
+
+func (i issueRandomCommitmentsDo) FirstOrInit() (*model.IssueRandomCommitments, error) {
+	if result, err := i.DO.FirstOrInit(); err != nil {
+		return nil, err
+	} else {
+		return result.(*model.IssueRandomCommitments), nil
+	}
+}
+
+func (i issueRandomCommitmentsDo) FirstOrCreate() (*model.IssueRandomCommitments, error) {
+	if result, err := i.DO.FirstOrCreate(); err != nil {
+		return nil, err
+	} else {
+		return result.(*model.IssueRandomCommitments), nil
+	}
+}
+
+func (i issueRandomCommitmentsDo) FindByPage(offset int, limit int) (result []*model.IssueRandomCommitments, count int64, err error) {
+	result, err = i.Offset(offset).Limit(limit).Find()
+	if err != nil {
+		return
+	}
+
+	if size := len(result); 0 < limit && 0 < size && size < limit {
+		count = int64(size + offset)
+		return
+	}
+
+	count, err = i.Offset(-1).Limit(-1).Count()
+	return
+}
+
+func (i issueRandomCommitmentsDo) ScanByPage(result interface{}, offset int, limit int) (count int64, err error) {
+	count, err = i.Count()
+	if err != nil {
+		return
+	}
+
+	err = i.Offset(offset).Limit(limit).Scan(result)
+	return
+}
+
+func (i issueRandomCommitmentsDo) Scan(result interface{}) (err error) {
+	return i.DO.Scan(result)
+}
+
+func (i issueRandomCommitmentsDo) Delete(models ...*model.IssueRandomCommitments) (result gen.ResultInfo, err error) {
+	return i.DO.Delete(models)
+}
+
+func (i *issueRandomCommitmentsDo) withDO(do gen.Dao) *issueRandomCommitmentsDo {
+	i.DO = *do.(*gen.DO)
+	return i
+}

internal/repository/mysql/dao/system_coupons.gen.go

@@ -40,6 +40,7 @@ func newSystemCoupons(db *gorm.DB, opts ...gen.DOOption) systemCoupons {
 	_systemCoupons.ValidStart = field.NewTime(tableName, "valid_start")
 	_systemCoupons.ValidEnd = field.NewTime(tableName, "valid_end")
 	_systemCoupons.Status = field.NewInt32(tableName, "status")
+	_systemCoupons.TotalQuantity = field.NewInt64(tableName, "total_quantity")
 
 	_systemCoupons.fillFieldMap()
 
@@ -64,6 +65,7 @@ type systemCoupons struct {
 	ValidStart    field.Time   // 有效期开始
 	ValidEnd      field.Time   // 有效期结束
 	Status        field.Int32  // 状态：1启用 2停用
+	TotalQuantity field.Int64
 
 	fieldMap map[string]field.Expr
 }
@@ -93,6 +95,7 @@ func (s *systemCoupons) updateTableName(table string) *systemCoupons {
 	s.ValidStart = field.NewTime(table, "valid_start")
 	s.ValidEnd = field.NewTime(table, "valid_end")
 	s.Status = field.NewInt32(table, "status")
+	s.TotalQuantity = field.NewInt64(table, "total_quantity")
 
 	s.fillFieldMap()
 
@@ -109,7 +112,7 @@ func (s *systemCoupons) GetFieldByName(fieldName string) (field.OrderExpr, bool)
 }
 
 func (s *systemCoupons) fillFieldMap() {
-	s.fieldMap = make(map[string]field.Expr, 13)
+	s.fieldMap = make(map[string]field.Expr, 14)
 	s.fieldMap["id"] = s.ID
 	s.fieldMap["created_at"] = s.CreatedAt
 	s.fieldMap["updated_at"] = s.UpdatedAt
@@ -123,6 +126,7 @@ func (s *systemCoupons) fillFieldMap() {
 	s.fieldMap["valid_start"] = s.ValidStart
 	s.fieldMap["valid_end"] = s.ValidEnd
 	s.fieldMap["status"] = s.Status
+	s.fieldMap["total_quantity"] = s.TotalQuantity
 }
 
 func (s systemCoupons) clone(db *gorm.DB) systemCoupons {

internal/repository/mysql/model/activity_draw_receipts.gen.go

@@ -0,0 +1,38 @@
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+
+package model
+
+import (
+	"time"
+)
+
+const TableNameActivityDrawReceipts = "activity_draw_receipts"
+
+// ActivityDrawReceipts 活动抽奖凭据表
+type ActivityDrawReceipts struct {
+	ID             int64     `gorm:"column:id;primaryKey;autoIncrement:true;comment:主键ID" json:"id"`                         // 主键ID
+	CreatedAt      time.Time `gorm:"column:created_at;not null;default:CURRENT_TIMESTAMP(3);comment:创建时间" json:"created_at"` // 创建时间
+	DrawLogID      int64     `gorm:"column:draw_log_id;not null;comment:抽奖日志ID（activity_draw_logs.id）" json:"draw_log_id"`   // 抽奖日志ID（activity_draw_logs.id）
+	AlgoVersion    string    `gorm:"column:algo_version;not null;comment:算法版本" json:"algo_version"`                          // 算法版本
+	RoundID        int64     `gorm:"column:round_id;not null;comment:期ID" json:"round_id"`                                   // 期ID
+	DrawID         int64     `gorm:"column:draw_id;not null;comment:抽奖ID" json:"draw_id"`                                    // 抽奖ID
+	ClientID       int64     `gorm:"column:client_id;not null;comment:客户端ID" json:"client_id"`                               // 客户端ID
+	Timestamp      int64     `gorm:"column:timestamp;not null;comment:时间戳（毫秒）" json:"timestamp"`                             // 时间戳（毫秒）
+	ServerSeedHash string    `gorm:"column:server_seed_hash;not null;comment:服务器种子哈希（十六进制）" json:"server_seed_hash"`         // 服务器种子哈希（十六进制）
+	ServerSubSeed  string    `gorm:"column:server_sub_seed;not null;comment:服务器子种子（十六进制）" json:"server_sub_seed"`            // 服务器子种子（十六进制）
+	ClientSeed     string    `gorm:"column:client_seed;not null;comment:客户端种子（十六进制）" json:"client_seed"`                     // 客户端种子（十六进制）
+	Nonce          int64     `gorm:"column:nonce;not null;comment:随机数" json:"nonce"`                                         // 随机数
+	ItemsRoot      string    `gorm:"column:items_root;not null;comment:项目根哈希（十六进制）" json:"items_root"`                       // 项目根哈希（十六进制）
+	WeightsTotal   int64     `gorm:"column:weights_total;not null;comment:权重总和" json:"weights_total"`                        // 权重总和
+	SelectedIndex  int32     `gorm:"column:selected_index;not null;comment:选中索引" json:"selected_index"`                      // 选中索引
+	RandProof      string    `gorm:"column:rand_proof;not null;comment:随机证明（十六进制）" json:"rand_proof"`                        // 随机证明（十六进制）
+	Signature      string    `gorm:"column:signature;comment:签名（十六进制，可选）" json:"signature"`                                  // 签名（十六进制，可选）
+	ItemsSnapshot  string    `gorm:"column:items_snapshot;comment:项目快照（JSON格式）" json:"items_snapshot"`                       // 项目快照（JSON格式）
+}
+
+// TableName ActivityDrawReceipts's table name
+func (*ActivityDrawReceipts) TableName() string {
+	return TableNameActivityDrawReceipts
+}

internal/repository/mysql/model/issue_random_commitments.gen.go

@@ -0,0 +1,30 @@
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+
+package model
+
+import (
+	"time"
+)
+
+const TableNameIssueRandomCommitments = "issue_random_commitments"
+
+// IssueRandomCommitments mapped from table <issue_random_commitments>
+type IssueRandomCommitments struct {
+	ID               int64     `gorm:"column:id;primaryKey;autoIncrement:true" json:"id"`
+	CreatedAt        time.Time `gorm:"column:created_at;not null;default:CURRENT_TIMESTAMP(3)" json:"created_at"`
+	UpdatedAt        time.Time `gorm:"column:updated_at;not null;default:CURRENT_TIMESTAMP(3)" json:"updated_at"`
+	IssueID          int64     `gorm:"column:issue_id;not null" json:"issue_id"`
+	AlgoVersion      string    `gorm:"column:algo_version;not null" json:"algo_version"`
+	ServerSeedMaster []byte    `gorm:"column:server_seed_master;not null" json:"server_seed_master"`
+	ServerSeedHash   []byte    `gorm:"column:server_seed_hash;not null" json:"server_seed_hash"`
+	ItemsRoot        []byte    `gorm:"column:items_root;not null" json:"items_root"`
+	WeightsTotal     int64     `gorm:"column:weights_total;not null" json:"weights_total"`
+	StateVersion     int32     `gorm:"column:state_version;not null" json:"state_version"`
+}
+
+// TableName IssueRandomCommitments's table name
+func (*IssueRandomCommitments) TableName() string {
+	return TableNameIssueRandomCommitments
+}

internal/repository/mysql/model/system_coupons.gen.go

@@ -25,6 +25,7 @@ type SystemCoupons struct {
 	ValidStart    time.Time `gorm:"column:valid_start;comment:有效期开始" json:"valid_start"`                                    // 有效期开始
 	ValidEnd      time.Time `gorm:"column:valid_end;comment:有效期结束" json:"valid_end"`                                        // 有效期结束
 	Status        int32     `gorm:"column:status;not null;default:1;comment:状态：1启用 2停用" json:"status"`                      // 状态：1启用 2停用
+	TotalQuantity int64     `gorm:"column:total_quantity" json:"total_quantity"`
 }
 
 // TableName SystemCoupons's table name

internal/router/router.go

@@ -82,6 +82,17 @@ func NewHTTPMux(logger logger.CustomLogger, db mysql.Repo) (core.Mux, error) {
 		adminAuthApiRouter.PUT("/activities/:activity_id/issues/:issue_id/rewards/:reward_id", adminHandler.ModifyIssueReward())
 		adminAuthApiRouter.DELETE("/activities/:activity_id/issues/:issue_id/rewards/:reward_id", adminHandler.DeleteIssueReward())
 
+		adminAuthApiRouter.POST("/activities/:activity_id/issues/:issue_id/commit_random", adminHandler.CommitIssueRandom())
+		adminAuthApiRouter.GET("/activities/:activity_id/issues/:issue_id/commit_random", adminHandler.GetIssueRandomCommit())
+		adminAuthApiRouter.GET("/activities/:activity_id/issues/:issue_id/commit_random/history", adminHandler.GetIssueRandomCommitHistory())
+		adminAuthApiRouter.POST("/activities/:activity_id/issues/:issue_id/simulate_draw", adminHandler.SimulateIssueDraw())
+		adminAuthApiRouter.POST("/activities/:activity_id/issues/:issue_id/batch_draw", adminHandler.BatchDrawForUsers())
+		adminAuthApiRouter.POST("/activities/:activity_id/issues/:issue_id/verify_draw", adminHandler.VerifyDrawReceipt())
+		adminAuthApiRouter.GET("/draw_receipts/:draw_id", adminHandler.GetDrawReceipt())
+		adminAuthApiRouter.GET("/draw_receipts/log/:log_id", adminHandler.GetDrawReceiptByLogID())
+		adminAuthApiRouter.POST("/batch_users", adminHandler.BatchCreateUsers())
+		adminAuthApiRouter.DELETE("/batch_users", adminHandler.BatchDeleteUsers())
+
 		adminAuthApiRouter.POST("/guilds", adminHandler.CreateGuild())
 		adminAuthApiRouter.PUT("/guilds/:guild_id", adminHandler.ModifyGuild())
 		adminAuthApiRouter.DELETE("/guilds/:guild_id", adminHandler.DeleteGuild())
@@ -192,6 +203,8 @@ func NewHTTPMux(logger logger.CustomLogger, db mysql.Repo) (core.Mux, error) {
             appAuthApiRouter.GET("/users/:user_id/addresses", userHandler.ListUserAddresses())
             appAuthApiRouter.PUT("/users/:user_id/addresses/:address_id/default", userHandler.SetDefaultUserAddress())
             appAuthApiRouter.DELETE("/users/:user_id/addresses/:address_id", userHandler.DeleteUserAddress())
+
+            appAuthApiRouter.POST("/activities/:activity_id/issues/:issue_id/draw", activityHandler.ExecuteDraw())
         }
 
 	return mux, nil

internal/service/activity/activity.go

@@ -29,9 +29,51 @@ type Service interface {
 
 	ListDrawLogs(ctx context.Context, issueID int64, page, pageSize int) (items []*model.ActivityDrawLogs, total int64, err error)
 
+    CommitIssueRandom(ctx context.Context, issueID int64) (*IssueRandomCommitment, error)
+    GetIssueRandomCommit(ctx context.Context, issueID int64) (*IssueRandomCommitment, error)
+    GetIssueRandomCommitHistory(ctx context.Context, issueID int64) ([]*IssueRandomCommitment, error)
+
+    ExecuteDraw(ctx context.Context, issueID int64) (*Receipt, error)
+
 	GetCategoryNames(ctx context.Context, ids []int64) (map[int64]string, error)
 }
 
+type IssueRandomCommitment struct {
+    AlgoVersion      string
+    IssueID          int64
+    ServerSeedMaster []byte
+    ServerSeedHash   []byte
+    ItemsRoot        []byte
+    WeightsTotal     int64
+    StateVersion     int32
+}
+
+type Receipt struct {
+    AlgoVersion     string
+    RoundId         int64
+    DrawId          int64
+    ClientId        int64
+    Timestamp       int64
+    ServerSeedHash  []byte
+    ServerSubSeed   []byte
+    ClientSeed      []byte
+    Nonce           uint64
+    Items           []ReceiptItem
+    ItemsRoot       []byte
+    WeightsTotal    uint64
+    SelectedIndex   int
+    SelectedItemId  int64
+    RandProof       []byte
+    Signature       []byte
+}
+
+type ReceiptItem struct {
+    ID              int64
+    Name            string
+    Weight          int32
+    QuantityBefore  int64
+}
+
 type service struct {
 	logger  logger.CustomLogger
 	readDB  *dao.Query

internal/service/activity/draw_execute.go

@@ -0,0 +1,145 @@
+package activity
+
+import (
+    "context"
+    "crypto/hmac"
+    "crypto/rand"
+    "crypto/sha256"
+    "encoding/binary"
+    "time"
+)
+
+func (s *service) ExecuteDraw(ctx context.Context, issueID int64) (*Receipt, error) {
+    cm, err := s.GetIssueRandomCommit(ctx, issueID)
+    if err != nil {
+        return nil, err
+    }
+    if cm == nil {
+        return nil, nil
+    }
+    master := unmaskSeed(cm.ServerSeedMaster, cm.IssueID, cm.StateVersion)
+    items, err := s.readDB.ActivityRewardSettings.WithContext(ctx).
+        Where(s.readDB.ActivityRewardSettings.IssueID.Eq(issueID)).
+        Order(s.readDB.ActivityRewardSettings.Sort).
+        Find()
+    if err != nil {
+        return nil, err
+    }
+    var snapshot []ReceiptItem
+    var total int64
+    for _, it := range items {
+        snapshot = append(snapshot, ReceiptItem{ID: it.ID, Name: it.Name, Weight: it.Weight, QuantityBefore: it.Quantity})
+        if it.Weight > 0 && (it.Quantity == -1 || it.Quantity > 0) {
+            total += int64(it.Weight)
+        }
+    }
+    if total <= 0 {
+        return nil, nil
+    }
+    drawId := time.Now().UnixNano()
+    clientSeed := make([]byte, 32)
+    _, _ = rand.Read(clientSeed)
+    nonce := uint64(1)
+    subInput := make([]byte, 16)
+    binary.BigEndian.PutUint64(subInput[:8], uint64(issueID))
+    binary.BigEndian.PutUint64(subInput[8:16], uint64(drawId))
+    mac := hmac.New(sha256.New, master)
+    mac.Write(subInput)
+    serverSubSeed := mac.Sum(nil)
+    enc := encodeMessage(cm.AlgoVersion, issueID, drawId, 0, clientSeed, nonce, cm.ItemsRoot[:], uint64(total))
+    entropy := hmacSha256(serverSubSeed, enc)
+    pos, proof := rejectSample(entropy, serverSubSeed, enc, uint64(total))
+    var acc uint64
+    var selIndex int
+    var selID int64
+    for i, it := range items {
+        if it.Weight <= 0 || !(it.Quantity == -1 || it.Quantity > 0) {
+            continue
+        }
+        w := uint64(it.Weight)
+        if pos < acc+w {
+            selIndex = i
+            selID = it.ID
+            break
+        }
+        acc += w
+    }
+    rec := &Receipt{
+        AlgoVersion:    cm.AlgoVersion,
+        RoundId:        issueID,
+        DrawId:         drawId,
+        ClientId:       0,
+        Timestamp:      time.Now().UnixMilli(),
+        ServerSeedHash: cm.ServerSeedHash[:],
+        ServerSubSeed:  serverSubSeed,
+        ClientSeed:     clientSeed,
+        Nonce:          nonce,
+        Items:          snapshot,
+        ItemsRoot:      cm.ItemsRoot[:],
+        WeightsTotal:   uint64(total),
+        SelectedIndex:  selIndex,
+        SelectedItemId: selID,
+        RandProof:      proof,
+        Signature:      nil,
+    }
+    return rec, nil
+}
+
+func encodeMessage(algo string, roundId int64, drawId int64, clientId int64, clientSeed []byte, nonce uint64, itemsRoot []byte, weightsTotal uint64) []byte {
+    var buf []byte
+    buf = appendUint32String(buf, algo)
+    buf = appendUint64(buf, uint64(roundId))
+    buf = appendUint64(buf, uint64(drawId))
+    buf = appendUint64(buf, uint64(clientId))
+    buf = appendUint32Bytes(buf, clientSeed)
+    buf = appendUint64(buf, nonce)
+    buf = append(buf, itemsRoot...)
+    buf = appendUint64(buf, weightsTotal)
+    return buf
+}
+
+func appendUint32String(b []byte, s string) []byte {
+    bs := []byte(s)
+    nb := make([]byte, 4)
+    binary.BigEndian.PutUint32(nb, uint32(len(bs)))
+    b = append(b, nb...)
+    b = append(b, bs...)
+    return b
+}
+
+func appendUint32Bytes(b []byte, bs []byte) []byte {
+    nb := make([]byte, 4)
+    binary.BigEndian.PutUint32(nb, uint32(len(bs)))
+    b = append(b, nb...)
+    b = append(b, bs...)
+    return b
+}
+
+func appendUint64(b []byte, v uint64) []byte {
+    nb := make([]byte, 8)
+    binary.BigEndian.PutUint64(nb, v)
+    b = append(b, nb...)
+    return b
+}
+
+func hmacSha256(key []byte, msg []byte) []byte {
+    m := hmac.New(sha256.New, key)
+    m.Write(msg)
+    return m.Sum(nil)
+}
+
+func rejectSample(entropy []byte, subSeed []byte, enc []byte, W uint64) (uint64, []byte) {
+    var counter uint64
+    for {
+        R := binary.BigEndian.Uint64(entropy[:8])
+        M := (uint64(^uint64(0)) / W) * W
+        if R < M {
+            return R % W, entropy
+        }
+        counter++
+        cenc := make([]byte, len(enc)+8)
+        copy(cenc, enc)
+        binary.BigEndian.PutUint64(cenc[len(enc):], counter)
+        entropy = hmacSha256(subSeed, cenc)
+    }
+}

internal/service/activity/random_commit.go

@@ -0,0 +1,146 @@
+package activity
+
+import (
+	"context"
+	"crypto/rand"
+	"crypto/sha256"
+	"encoding/json"
+	"errors"
+	"sort"
+
+	"bindbox-game/internal/repository/mysql/model"
+
+	"gorm.io/gorm"
+)
+
+var algoVersion = "v1-hmac-256"
+
+func (s *service) CommitIssueRandom(ctx context.Context, issueID int64) (*IssueRandomCommitment, error) {
+	// 检查活动期数状态
+	issue, err := s.readDB.ActivityIssues.WithContext(ctx).
+		Where(s.readDB.ActivityIssues.ID.Eq(issueID)).
+		First()
+	if err != nil {
+		if err == gorm.ErrRecordNotFound {
+			return nil, errors.New("活动期数不存在")
+		}
+		return nil, err
+	}
+
+	// 只允许在未开始状态(3)生成承诺
+	if issue.Status != 3 {
+		return nil, errors.New("只能在期数未开始状态下生成随机承诺")
+	}
+
+	// 检查是否已存在承诺（防止重复生成）
+	existing, _ := s.readDB.IssueRandomCommitments.WithContext(ctx).
+		Where(s.readDB.IssueRandomCommitments.IssueID.Eq(issueID)).
+		First()
+	if existing != nil {
+		return nil, errors.New("该期数已存在随机承诺，不可重复生成")
+	}
+
+	items, err := s.readDB.ActivityRewardSettings.WithContext(ctx).
+		Where(s.readDB.ActivityRewardSettings.IssueID.Eq(issueID)).
+		Order(s.readDB.ActivityRewardSettings.ID).
+		Find()
+	if err != nil {
+		return nil, err
+	}
+	if len(items) == 0 {
+		return nil, errors.New("该期数未配置奖励，无法生成随机承诺")
+	}
+	canonical := make([]ReceiptItem, 0, len(items))
+	var weightsTotal int64
+	for _, it := range items {
+		canonical = append(canonical, ReceiptItem{ID: it.ID, Name: it.Name, Weight: it.Weight, QuantityBefore: it.Quantity})
+		if it.Weight > 0 && (it.Quantity == -1 || it.Quantity > 0) {
+			weightsTotal += int64(it.Weight)
+		}
+	}
+
+	// 检查奖池权重是否有效
+	if weightsTotal <= 0 {
+		return nil, errors.New("奖池配置无效：总权重必须大于0")
+	}
+
+	sort.Slice(canonical, func(i, j int) bool { return canonical[i].ID < canonical[j].ID })
+	b, _ := json.Marshal(canonical)
+	itemsRoot := sha256.Sum256(b)
+	master := make([]byte, 32)
+	_, _ = rand.Read(master)
+	serverHash := sha256.Sum256(master)
+
+	nextVer := int32(1)
+	enc, _ := maskSeed(master, issueID, nextVer)
+	rec := &model.IssueRandomCommitments{
+		IssueID:          issueID,
+		AlgoVersion:      algoVersion,
+		ServerSeedMaster: enc,
+		ServerSeedHash:   serverHash[:],
+		ItemsRoot:        itemsRoot[:],
+		WeightsTotal:     weightsTotal,
+		StateVersion:     nextVer,
+	}
+	if err := s.writeDB.IssueRandomCommitments.WithContext(ctx).Create(rec); err != nil {
+		return nil, err
+	}
+	return &IssueRandomCommitment{
+		AlgoVersion:      rec.AlgoVersion,
+		IssueID:          rec.IssueID,
+		ServerSeedMaster: rec.ServerSeedMaster,
+		ServerSeedHash:   rec.ServerSeedHash,
+		ItemsRoot:        rec.ItemsRoot,
+		WeightsTotal:     rec.WeightsTotal,
+		StateVersion:     rec.StateVersion,
+	}, nil
+}
+
+func (s *service) GetIssueRandomCommit(ctx context.Context, issueID int64) (*IssueRandomCommitment, error) {
+	latest, err := s.readDB.IssueRandomCommitments.WithContext(ctx).
+		Where(s.readDB.IssueRandomCommitments.IssueID.Eq(issueID)).
+		Order(s.readDB.IssueRandomCommitments.StateVersion.Desc()).
+		Take()
+	if err != nil {
+		if err == gorm.ErrRecordNotFound {
+			return nil, nil // 没有找到记录是正常的，表示尚未生成承诺
+		}
+		return nil, err
+	}
+	return &IssueRandomCommitment{
+		AlgoVersion:      latest.AlgoVersion,
+		IssueID:          latest.IssueID,
+		ServerSeedMaster: latest.ServerSeedMaster,
+		ServerSeedHash:   latest.ServerSeedHash,
+		ItemsRoot:        latest.ItemsRoot,
+		WeightsTotal:     latest.WeightsTotal,
+		StateVersion:     latest.StateVersion,
+	}, nil
+}
+
+func (s *service) GetIssueRandomCommitHistory(ctx context.Context, issueID int64) ([]*IssueRandomCommitment, error) {
+	commitments, err := s.readDB.IssueRandomCommitments.WithContext(ctx).
+		Where(s.readDB.IssueRandomCommitments.IssueID.Eq(issueID)).
+		Order(s.readDB.IssueRandomCommitments.StateVersion.Desc()).
+		Find()
+	if err != nil {
+		if err == gorm.ErrRecordNotFound {
+			return []*IssueRandomCommitment{}, nil // 返回空数组而不是错误
+		}
+		return nil, err
+	}
+
+	result := make([]*IssueRandomCommitment, 0, len(commitments))
+	for _, commit := range commitments {
+		result = append(result, &IssueRandomCommitment{
+			AlgoVersion:      commit.AlgoVersion,
+			IssueID:          commit.IssueID,
+			ServerSeedMaster: commit.ServerSeedMaster,
+			ServerSeedHash:   commit.ServerSeedHash,
+			ItemsRoot:        commit.ItemsRoot,
+			WeightsTotal:     commit.WeightsTotal,
+			StateVersion:     commit.StateVersion,
+		})
+	}
+	return result, nil
+}

internal/service/activity/seed_crypto.go

@@ -0,0 +1,58 @@
+package activity
+
+import (
+    "crypto/hmac"
+    "crypto/sha256"
+    "encoding/binary"
+    "encoding/hex"
+
+    "bindbox-game/configs"
+)
+
+func masterKey() []byte {
+    s := configs.Get().Random.CommitMasterKey
+    if s == "" {
+        return nil
+    }
+    b, err := hex.DecodeString(s)
+    if err != nil || len(b) == 0 {
+        return nil
+    }
+    return b
+}
+
+func deriveMask(key []byte, issueID int64, version int32) []byte {
+    m := hmac.New(sha256.New, key)
+    buf := make([]byte, 12)
+    binary.BigEndian.PutUint64(buf[:8], uint64(issueID))
+    binary.BigEndian.PutUint32(buf[8:12], uint32(version))
+    m.Write(buf)
+    sum := m.Sum(nil)
+    return sum[:32]
+}
+
+func maskSeed(master []byte, issueID int64, version int32) ([]byte, bool) {
+    key := masterKey()
+    if key == nil {
+        return master, false
+    }
+    ks := deriveMask(key, issueID, version)
+    out := make([]byte, len(master))
+    for i := range master {
+        out[i] = master[i] ^ ks[i%len(ks)]
+    }
+    return out, true
+}
+
+func unmaskSeed(enc []byte, issueID int64, version int32) []byte {
+    key := masterKey()
+    if key == nil {
+        return enc
+    }
+    ks := deriveMask(key, issueID, version)
+    out := make([]byte, len(enc))
+    for i := range enc {
+        out[i] = enc[i] ^ ks[i%len(ks)]
+    }
+    return out
+}

internal/service/user/batch_user.go

@@ -0,0 +1,35 @@
+package user
+
+import (
+    "context"
+    "time"
+
+    "bindbox-game/internal/repository/mysql/model"
+)
+
+type CreateUserInput struct {
+    Nickname string
+    OpenID   string
+    Avatar   string
+}
+
+func (s *service) CreateUser(ctx context.Context, in CreateUserInput) (*model.Users, error) {
+    now := time.Now()
+    u := &model.Users{
+        Nickname:  in.Nickname,
+        Openid:    in.OpenID,
+        Avatar:    in.Avatar,
+        Status:    1,
+        CreatedAt: now,
+        UpdatedAt: now,
+    }
+    if err := s.writeDB.Users.WithContext(ctx).Create(u); err != nil {
+        return nil, err
+    }
+    return u, nil
+}
+
+func (s *service) DeleteUser(ctx context.Context, userID int64) error {
+    _, err := s.writeDB.Users.WithContext(ctx).Where(s.writeDB.Users.ID.Eq(userID)).Delete()
+    return err
+}

internal/service/user/user.go

@@ -31,6 +31,8 @@ type Service interface {
     ListAddresses(ctx context.Context, userID int64, page, pageSize int) (items []*model.UserAddresses, total int64, err error)
     SetDefaultAddress(ctx context.Context, userID int64, addressID int64) error
     DeleteAddress(ctx context.Context, userID int64, addressID int64) error
+    CreateUser(ctx context.Context, in CreateUserInput) (*model.Users, error)
+    DeleteUser(ctx context.Context, userID int64) error
 }
 
 type service struct {

logs/mini-chat-access.log

@@ -3,3 +3,7 @@
 {"level":"fatal","time":"2025-11-14 15:16:49","caller":"logger/logger.go:333","msg":"http server startup err","domain":"mini-chat[fat]","error":"listen tcp :9991: bind: address already in use"}
 {"level":"fatal","time":"2025-11-14 16:52:42","caller":"logger/logger.go:333","msg":"http server startup err","domain":"mini-chat[fat]","error":"listen tcp :9991: bind: address already in use"}
 {"level":"fatal","time":"2025-11-14 18:32:56","caller":"logger/logger.go:333","msg":"http server startup err","domain":"mini-chat[fat]","error":"listen tcp :9991: bind: address already in use"}
+{"level":"fatal","time":"2025-11-15 12:25:30","caller":"logger/logger.go:333","msg":"http server startup err","domain":"mini-chat[fat]","error":"listen tcp :9991: bind: address already in use"}
+{"level":"fatal","time":"2025-11-15 12:26:06","caller":"logger/logger.go:333","msg":"http server startup err","domain":"mini-chat[fat]","error":"listen tcp :9991: bind: address already in use"}
+{"level":"fatal","time":"2025-11-15 12:28:06","caller":"logger/logger.go:333","msg":"http server startup err","domain":"mini-chat[fat]","error":"listen tcp :9991: bind: address already in use"}
+{"level":"fatal","time":"2025-11-15 13:05:26","caller":"logger/logger.go:333","msg":"http server startup err","domain":"mini-chat[fat]","error":"listen tcp :9991: bind: address already in use"}

test_lottery_profit.js

@@ -0,0 +1,218 @@
+// 抽奖盈亏计算测试示例
+// 基于实际业务逻辑的模拟数据
+
+// 模拟一个抽奖活动的配置
+const mockActivity = {
+  id: 1,
+  name: "春节抽奖活动",
+  price_draw: 1000, // 门票价格：10元 = 1000分
+  status: 1
+};
+
+// 模拟奖项配置
+const mockRewards = [
+  {
+    id: 1,
+    name: "iPhone 15 Pro",
+    weight: 1,
+    quantity: 10,
+    product_id: 101,
+    cost: 800000 // 成本：8000元 = 800000分
+  },
+  {
+    id: 2,
+    name: "AirPods Pro",
+    weight: 10,
+    quantity: 50,
+    product_id: 102,
+    cost: 200000 // 成本：2000元 = 200000分
+  },
+  {
+    id: 3,
+    name: "小米手环",
+    weight: 100,
+    quantity: 200,
+    product_id: 103,
+    cost: 20000 // 成本：200元 = 20000分
+  },
+  {
+    id: 4,
+    name: "优惠券10元",
+    weight: 1000,
+    quantity: -1, // -1 表示不限量
+    product_id: null,
+    cost: 1000 // 成本：10元 = 1000分（平台补贴）
+  },
+  {
+    id: 5,
+    name: "谢谢参与",
+    weight: 5000,
+    quantity: -1,
+    product_id: null,
+    cost: 0 // 无成本
+  }
+];
+
+// 计算理论概率和期望支出
+function calculateTheoreticalData(rewards) {
+  // 筛选有效奖项（weight > 0 且 quantity != 0）
+  const validRewards = rewards.filter(r => r.weight > 0 && r.quantity !== 0);
+  
+  // 计算总权重
+  const totalWeight = validRewards.reduce((sum, r) => sum + r.weight, 0);
+  
+  // 计算每个奖项的理论概率和期望支出
+  const results = validRewards.map(reward => {
+    const probability = reward.weight / totalWeight;
+    const expectedCost = probability * reward.cost; // 单次抽奖的期望支出
+    
+    return {
+      ...reward,
+      probability,
+      expectedCost
+    };
+  });
+  
+  // 总期望支出（单次抽奖）
+  const totalExpectedCost = results.reduce((sum, r) => sum + r.expectedCost, 0);
+  
+  return {
+    rewards: results,
+    totalWeight,
+    totalExpectedCost
+  };
+}
+
+// 模拟抽奖结果
+function simulateDraws(rewards, sampleSize) {
+  const theoretical = calculateTheoreticalData(rewards);
+  const results = {};
+  
+  // 初始化结果统计
+  theoretical.rewards.forEach(reward => {
+    results[reward.id] = {
+      ...reward,
+      count: 0,
+      simulatedCost: 0
+    };
+  });
+  
+  // 模拟抽奖
+  for (let i = 0; i < sampleSize; i++) {
+    const random = Math.random();
+    let cumulativeProbability = 0;
+    
+    // 根据概率选择奖项
+    for (const reward of theoretical.rewards) {
+      cumulativeProbability += reward.probability;
+      if (random <= cumulativeProbability) {
+        results[reward.id].count++;
+        results[reward.id].simulatedCost += reward.cost;
+        break;
+      }
+    }
+  }
+  
+  return {
+    theoretical,
+    simulated: Object.values(results),
+    sampleSize
+  };
+}
+
+// 计算盈亏指标
+function calculateProfitMetrics(activity, simulation) {
+  const { theoretical, simulated, sampleSize } = simulation;
+  const ticketPrice = activity.price_draw;
+  
+  // 理论计算
+  const theoreticalRevenue = ticketPrice * sampleSize;
+  const theoreticalPayout = theoretical.totalExpectedCost * sampleSize;
+  const theoreticalProfit = theoreticalRevenue - theoreticalPayout;
+  const theoreticalMargin = theoreticalProfit / theoreticalRevenue;
+  
+  // 模拟计算
+  const simulatedRevenue = ticketPrice * sampleSize;
+  const simulatedPayout = simulated.reduce((sum, r) => sum + r.simulatedCost, 0);
+  const simulatedProfit = simulatedRevenue - simulatedPayout;
+  const simulatedMargin = simulatedProfit / simulatedRevenue;
+  
+  return {
+    theoretical: {
+      revenue: theoreticalRevenue,
+      payout: theoreticalPayout,
+      profit: theoreticalProfit,
+      margin: theoreticalMargin
+    },
+    simulated: {
+      revenue: simulatedRevenue,
+      payout: simulatedPayout,
+      profit: simulatedProfit,
+      margin: simulatedMargin
+    }
+  };
+}
+
+// 运行测试
+function runLotteryProfitTest() {
+  console.log("=== 抽奖盈亏分析测试 ===");
+  console.log(`活动: ${mockActivity.name}`);
+  console.log(`门票价格: ¥${(mockActivity.price_draw / 100).toFixed(2)}`);
+  console.log("");
+  
+  // 理论计算
+  const theoreticalData = calculateTheoreticalData(mockRewards);
+  console.log("--- 理论概率分析 ---");
+  console.log(`总权重: ${theoreticalData.totalWeight}`);
+  console.log(`单次期望支出: ¥${(theoreticalData.totalExpectedCost / 100).toFixed(4)}`);
+  console.log(`单次期望利润: ¥${((mockActivity.price_draw - theoreticalData.totalExpectedCost) / 100).toFixed(4)}`);
+  console.log("");
+  
+  theoreticalData.rewards.forEach(reward => {
+    console.log(`${reward.name}:`);
+    console.log(`  权重: ${reward.weight}, 概率: ${(reward.probability * 100).toFixed(4)}%`);
+    console.log(`  成本: ¥${(reward.cost / 100).toFixed(2)}, 期望支出: ¥${(reward.expectedCost / 100).toFixed(4)}`);
+  });
+  
+  console.log("\n--- 模拟结果 (样本数: 10000) ---");
+  const simulation = simulateDraws(mockRewards, 10000);
+  const metrics = calculateProfitMetrics(mockActivity, simulation);
+  
+  console.log("理论值:");
+  console.log(`  总收入: ¥${(metrics.theoretical.revenue / 100).toFixed(2)}`);
+  console.log(`  总支出: ¥${(metrics.theoretical.payout / 100).toFixed(2)}`);
+  console.log(`  总利润: ¥${(metrics.theoretical.profit / 100).toFixed(2)}`);
+  console.log(`  利润率: ${(metrics.theoretical.margin * 100).toFixed(2)}%`);
+  
+  console.log("\n模拟值:");
+  console.log(`  总收入: ¥${(metrics.simulated.revenue / 100).toFixed(2)}`);
+  console.log(`  总支出: ¥${(metrics.simulated.payout / 100).toFixed(2)}`);
+  console.log(`  总利润: ¥${(metrics.simulated.profit / 100).toFixed(2)}`);
+  console.log(`  利润率: ${(metrics.simulated.margin * 100).toFixed(2)}%`);
+  
+  console.log("\n--- 各奖项模拟结果 ---");
+  simulation.simulated.forEach(result => {
+    const simulatedRate = result.count / simulation.sampleSize;
+    const theoreticalRate = result.probability;
+    const diff = Math.abs(simulatedRate - theoreticalRate) * 100;
+    
+    console.log(`${result.name}:`);
+    console.log(`  模拟次数: ${result.count}, 模拟概率: ${(simulatedRate * 100).toFixed(3)}%`);
+    console.log(`  理论概率: ${(theoreticalRate * 100).toFixed(3)}%, 差异: ${diff.toFixed(3)}%`);
+    console.log(`  模拟支出: ¥${(result.simulatedCost / 100).toFixed(2)}`);
+  });
+  
+  // 验证大数定律
+  console.log("\n--- 大数定律验证 ---");
+  const largeSample = simulateDraws(mockRewards, 100000);
+  largeSample.simulated.forEach(result => {
+    const simulatedRate = result.count / largeSample.sampleSize;
+    const theoreticalRate = result.probability;
+    const diff = Math.abs(simulatedRate - theoreticalRate) * 100;
+    
+    console.log(`${result.name}: 模拟概率 ${(simulatedRate * 100).toFixed(4)}% vs 理论概率 ${(theoreticalRate * 100).toFixed(4)}%, 差异 ${diff.toFixed(4)}%`);
+  });
+}
+
+// 运行测试
+runLotteryProfitTest();