init: 初始化 AssetX 项目仓库

包含 webapp（Next.js 用户端）、webapp-back（Go 后端）、
antdesign（管理后台）、landingpage（营销落地页）、
数据库 SQL 和配置文件。

webapp-back/holders/db_config.go

@@ -0,0 +1,125 @@
+package holders
+
+import (
+	"fmt"
+	"log"
+	"time"
+
+	"github.com/gothinkster/golang-gin-realworld-example-app/common"
+)
+
+// Asset represents a product/asset in the database
+type Asset struct {
+	ID              int64   `gorm:"column:id"`
+	AssetCode       string  `gorm:"column:asset_code"`
+	Name            string  `gorm:"column:name"`
+	TokenRole       string  `gorm:"column:token_role"`
+	ChainID         int     `gorm:"column:chain_id"`
+	ContractAddress string  `gorm:"column:contract_address"`
+	DeployBlock     *uint64 `gorm:"column:deploy_block"`
+}
+
+
+const zeroAddress = "0x0000000000000000000000000000000000000000"
+
+// LoadConfigFromDB loads contract addresses and deploy blocks from database based on chain ID
+func LoadConfigFromDB(chainID int64) (Config, error) {
+	db := common.GetDB()
+
+	log.Printf("📚 [Scanner] 从数据库加载配置 - Chain ID: %d", chainID)
+
+	switch chainID {
+	case 97, 421614:
+		// supported
+	default:
+		return Config{}, fmt.Errorf("unsupported chain ID: %d", chainID)
+	}
+
+	// Load YT assets by token_role filtered by chain_id
+	var assets []Asset
+	if err := db.Table("assets").
+		Where("token_role = ? AND chain_id = ? AND is_active = ?", "yt_token", chainID, true).
+		Find(&assets).Error; err != nil {
+		return Config{}, fmt.Errorf("failed to load assets: %w", err)
+	}
+
+	ytVaults := make([]VaultConfig, 0, len(assets))
+	for _, asset := range assets {
+		if asset.ContractAddress == "" || asset.ContractAddress == zeroAddress {
+			log.Printf("⚠️  [Scanner] 跳过 %s (地址未配置)", asset.AssetCode)
+			continue
+		}
+		if asset.DeployBlock == nil || *asset.DeployBlock == 0 {
+			log.Printf("⚠️  [Scanner] 跳过 %s (deploy_block 未配置)", asset.AssetCode)
+			continue
+		}
+
+		ytVaults = append(ytVaults, VaultConfig{
+			Name:        asset.AssetCode,
+			Address:     asset.ContractAddress,
+			DeployBlock: *asset.DeployBlock,
+		})
+		log.Printf("   ✓ %s: %s (部署区块: %d)", asset.AssetCode, asset.ContractAddress, *asset.DeployBlock)
+	}
+	log.Printf("✅ [Scanner] 加载了 %d 个 YT Vault", len(ytVaults))
+
+	// Load YTLPToken address from system_contracts
+	var ytLPContract struct {
+		Address     string  `gorm:"column:address"`
+		DeployBlock *uint64 `gorm:"column:deploy_block"`
+	}
+	ytLPAddress := ""
+	var ytLPDeployBlock uint64
+	err := db.Table("system_contracts").
+		Where("name = ? AND chain_id = ? AND is_active = ?", "YTLPToken", chainID, 1).
+		Select("address, deploy_block").
+		First(&ytLPContract).Error
+	if err != nil {
+		log.Printf("⚠️  [Scanner] 未找到 YTLPToken 配置")
+	} else if ytLPContract.Address == "" || ytLPContract.Address == zeroAddress {
+		log.Printf("⚠️  [Scanner] 跳过 ytLP (地址未配置)")
+	} else if ytLPContract.DeployBlock == nil || *ytLPContract.DeployBlock == 0 {
+		log.Printf("⚠️  [Scanner] 跳过 ytLP (deploy_block 未配置)")
+	} else {
+		ytLPAddress = ytLPContract.Address
+		ytLPDeployBlock = *ytLPContract.DeployBlock
+		log.Printf("✅ [Scanner] ytLP: %s (部署区块: %d)", ytLPAddress, ytLPDeployBlock)
+	}
+
+	rpcURL := getRPCURLForChain(chainID)
+
+	config := Config{
+		ChainID:     int(chainID),
+		RPCURL:      rpcURL,
+		YTVaults:    ytVaults,
+		YTLPAddress: ytLPAddress,
+		DeploymentBlocks: DeploymentBlocks{
+			YTLP: ytLPDeployBlock,
+		},
+		PollInterval: 30 * time.Second,
+		BatchSize:    9999,
+	}
+
+	log.Printf("📊 [Scanner] 配置加载完成: YT Vaults=%d, ytLP=%s, RPC=%s",
+		len(config.YTVaults), config.YTLPAddress, config.RPCURL)
+
+	return config, nil
+}
+
+// getRPCURLForChain returns the RPC URL for the given chain ID
+func getRPCURLForChain(chainID int64) string {
+	switch chainID {
+	case 421614:
+		return "https://api.zan.top/node/v1/arb/sepolia/baf84c429d284bb5b676cb8c9ca21c07"
+	case 97:
+		return "https://api.zan.top/node/v1/bsc/testnet/baf84c429d284bb5b676cb8c9ca21c07"
+	default:
+		return ""
+	}
+}
+
+// TableName sets the table name for GORM
+func (Asset) TableName() string {
+	return "assets"
+}
+