feat: AI cost tracking, pre-launch balance check, low balance alerts

- store/ai_charge.go: local AI cost tracking per call (SQLite)
- wallet/usdc.go: shared USDC balance query (Base chain RPC)
- Pre-launch: estimate daily cost + runway days
- Low balance: warn <$1, error at $0 (every 10 cycles)
- API: GET /api/ai-costs for cost history
- Frontend: model cards show price per call
- Frontend: wallet create + QR deposit + balance display

api/handler_ai_cost.go

@@ -0,0 +1,43 @@
+package api
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+)
+
+// handleGetAICosts returns AI charges for a specific trader
+func (s *Server) handleGetAICosts(c *gin.Context) {
+	traderID := c.Query("trader_id")
+	period := c.DefaultQuery("period", "today")
+
+	if traderID == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "trader_id is required"})
+		return
+	}
+
+	charges, total, err := s.store.AICharge().GetCharges(traderID, period)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{
+		"charges": charges,
+		"total":   total,
+		"count":   len(charges),
+	})
+}
+
+// handleGetAICostsSummary returns AI cost summary across all traders
+func (s *Server) handleGetAICostsSummary(c *gin.Context) {
+	period := c.DefaultQuery("period", "today")
+
+	total, count, byModel := s.store.AICharge().GetSummary(period)
+
+	c.JSON(http.StatusOK, gin.H{
+		"total":    total,
+		"count":    count,
+		"by_model": byModel,
+	})
+}

api/handler_wallet.go

@@ -1,13 +1,10 @@
 package api
 
 import (
-	"bytes"
 	"encoding/hex"
-	"encoding/json"
 	"fmt"
-	"io"
-	"math/big"
 	"net/http"
+	"nofx/wallet"
 	"strings"
 	"time"
 
@@ -27,11 +24,7 @@ type walletValidateResponse struct {
 	Error        string `json:"error,omitempty"`
 }
 
-const (
-	baseRPCURL      = "https://mainnet.base.org"
-	usdcContractBase = "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
-	usdcDecimals     = 6
-)
+
 
 func (s *Server) handleWalletValidate(c *gin.Context) {
 	var req walletValidateRequest
@@ -85,7 +78,7 @@ func (s *Server) handleWalletValidate(c *gin.Context) {
 	addrHex := address.Hex()
 
 	// Query USDC balance (async-ish, but sequential for simplicity)
-	balanceStr := queryUSDCBalance(addrHex)
+	balanceStr := wallet.QueryUSDCBalanceStr(addrHex)
 
 	// Check claw402 health
 	claw402Status := checkClaw402Health()
@@ -98,65 +91,28 @@ func (s *Server) handleWalletValidate(c *gin.Context) {
 	})
 }
 
-func queryUSDCBalance(address string) string {
-	// Build balanceOf(address) call data
-	// Function selector: 0x70a08231
-	// Pad address to 32 bytes
-	addrNoPre := strings.TrimPrefix(strings.ToLower(address), "0x")
-	data := "0x70a08231" + fmt.Sprintf("%064s", addrNoPre)
 
-	payload := map[string]interface{}{
-		"jsonrpc": "2.0",
-		"method":  "eth_call",
-		"params": []interface{}{
-			map[string]string{
-				"to":   usdcContractBase,
-				"data": data,
-			},
-			"latest",
-		},
-		"id": 1,
-	}
 
-	body, err := json.Marshal(payload)
+type walletGenerateResponse struct {
+	Address    string `json:"address"`
+	PrivateKey string `json:"private_key"`
+}
+
+func (s *Server) handleWalletGenerate(c *gin.Context) {
+	// Generate new EVM wallet
+	privateKey, err := crypto.GenerateKey()
 	if err != nil {
-		return "0.00"
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to generate wallet"})
+		return
 	}
 
-	client := &http.Client{Timeout: 10 * time.Second}
-	resp, err := client.Post(baseRPCURL, "application/json", bytes.NewReader(body))
-	if err != nil {
-		return "0.00"
-	}
-	defer resp.Body.Close()
+	address := crypto.PubkeyToAddress(privateKey.PublicKey)
+	privKeyHex := "0x" + hex.EncodeToString(crypto.FromECDSA(privateKey))
 
-	respBody, err := io.ReadAll(resp.Body)
-	if err != nil {
-		return "0.00"
-	}
-
-	var rpcResp struct {
-		Result string `json:"result"`
-	}
-	if err := json.Unmarshal(respBody, &rpcResp); err != nil {
-		return "0.00"
-	}
-
-	// Parse hex result
-	hexStr := strings.TrimPrefix(rpcResp.Result, "0x")
-	if hexStr == "" || hexStr == "0" {
-		return "0.00"
-	}
-
-	balance := new(big.Int)
-	balance.SetString(hexStr, 16)
-
-	// Convert to float with 6 decimals
-	divisor := new(big.Int).Exp(big.NewInt(10), big.NewInt(usdcDecimals), nil)
-	whole := new(big.Int).Div(balance, divisor)
-	remainder := new(big.Int).Mod(balance, divisor)
-
-	return fmt.Sprintf("%d.%06d", whole, remainder)
+	c.JSON(http.StatusOK, walletGenerateResponse{
+		Address:    address.Hex(),
+		PrivateKey: privKeyHex,
+	})
 }
 
 func checkClaw402Health() string {

api/server.go

@@ -89,6 +89,7 @@ func (s *Server) setupRoutes() {
 
 		// Wallet validation (no authentication required — used by frontend config form)
 		api.POST("/wallet/validate", s.handleWalletValidate)
+		api.POST("/wallet/generate", s.handleWalletGenerate)
 
 		// Crypto related endpoints (no authentication required, not exposed to bot)
 		api.GET("/crypto/config", s.cryptoHandler.HandleGetCryptoConfig)
@@ -173,6 +174,10 @@ Body: {"show_in_competition":<bool>}`,
 				`:id = trader_id from GET /api/my-traders.`,
 				s.handleGetGridRiskInfo)
 
+			// AI cost tracking
+			s.route(protected, "GET", "/ai-costs", "Get AI call costs for a trader (?trader_id=xxx&period=today)", s.handleGetAICosts)
+			s.route(protected, "GET", "/ai-costs/summary", "Get AI cost summary (?period=today)", s.handleGetAICostsSummary)
+
 			// AI model configuration
 			s.routeWithSchema(protected, "GET", "/models", "List AI model configs",
 				`Returns: [{"id":"<EXACT id — use this as ai_model_id when creating/updating a trader>","name":"<display name>","provider":"<short provider name — NOT a valid id>","enabled":<bool>}]

store/ai_charge.go

@@ -0,0 +1,167 @@
+package store
+
+import (
+	"time"
+
+	"gorm.io/gorm"
+)
+
+// AICharge represents a single AI call charge record
+type AICharge struct {
+	ID        int64     `gorm:"primaryKey;autoIncrement" json:"id"`
+	TraderID  string    `gorm:"column:trader_id;not null;index:idx_ai_charges_trader" json:"trader_id"`
+	Model     string    `gorm:"column:model;not null" json:"model"`
+	Provider  string    `gorm:"column:provider;not null" json:"provider"`
+	CostUSD   float64   `gorm:"column:cost_usd;not null" json:"cost_usd"`
+	CreatedAt time.Time `gorm:"autoCreateTime" json:"created_at"`
+}
+
+func (AICharge) TableName() string { return "ai_charges" }
+
+// modelPrices maps model ID to approximate cost per call in USD
+var modelPrices = map[string]float64{
+	"deepseek":          0.003,
+	"deepseek-reasoner": 0.005,
+	"gpt-5.4":           0.05,
+	"gpt-5.4-pro":       0.50,
+	"gpt-5.3":           0.01,
+	"gpt-5-mini":        0.005,
+	"claude-opus":        0.12,
+	"qwen-max":           0.01,
+	"qwen-plus":          0.005,
+	"qwen-turbo":         0.002,
+	"qwen-flash":         0.002,
+	"grok-4.1":           0.06,
+	"gemini-3.1-pro":     0.03,
+	"kimi-k2.5":          0.008,
+}
+
+// GetModelPrice returns the price per call for a given model
+func GetModelPrice(model string) float64 {
+	if price, ok := modelPrices[model]; ok {
+		return price
+	}
+	return 0.01 // default fallback
+}
+
+// AIChargeStore handles AI charge records
+type AIChargeStore struct {
+	db *gorm.DB
+}
+
+// NewAIChargeStore creates a new AIChargeStore
+func NewAIChargeStore(db *gorm.DB) *AIChargeStore {
+	return &AIChargeStore{db: db}
+}
+
+func (s *AIChargeStore) initTables() error {
+	return s.db.AutoMigrate(&AICharge{})
+}
+
+// Record records a new AI charge
+func (s *AIChargeStore) Record(traderID, model, provider string) error {
+	cost := GetModelPrice(model)
+	charge := &AICharge{
+		TraderID: traderID,
+		Model:    model,
+		Provider: provider,
+		CostUSD:  cost,
+	}
+	return s.db.Create(charge).Error
+}
+
+// GetCharges returns charges for a trader within a period, plus total cost
+func (s *AIChargeStore) GetCharges(traderID string, period string) ([]AICharge, float64, error) {
+	var charges []AICharge
+	query := s.db.Where("trader_id = ?", traderID)
+	query = applyPeriodFilter(query, period)
+	if err := query.Order("created_at DESC").Find(&charges).Error; err != nil {
+		return nil, 0, err
+	}
+
+	var total float64
+	for _, c := range charges {
+		total += c.CostUSD
+	}
+	return charges, total, nil
+}
+
+// GetDailyCost returns total cost across all traders for a period
+func (s *AIChargeStore) GetDailyCost(period string) float64 {
+	var total float64
+	query := s.db.Model(&AICharge{}).Select("COALESCE(SUM(cost_usd), 0)")
+	query = applyPeriodFilter(query, period)
+	query.Scan(&total)
+	return total
+}
+
+// GetSummary returns summary stats for a period
+func (s *AIChargeStore) GetSummary(period string) (total float64, count int64, byModel map[string]float64) {
+	byModel = make(map[string]float64)
+
+	query := s.db.Model(&AICharge{})
+	query = applyPeriodFilter(query, period)
+	query.Count(&count)
+
+	query2 := s.db.Model(&AICharge{}).Select("COALESCE(SUM(cost_usd), 0)")
+	query2 = applyPeriodFilter(query2, period)
+	query2.Scan(&total)
+
+	// By model breakdown
+	type modelCost struct {
+		Model string  `gorm:"column:model"`
+		Total float64 `gorm:"column:total"`
+	}
+	var results []modelCost
+	query3 := s.db.Model(&AICharge{}).Select("model, SUM(cost_usd) as total").Group("model")
+	query3 = applyPeriodFilter(query3, period)
+	query3.Find(&results)
+	for _, r := range results {
+		byModel[r.Model] = r.Total
+	}
+
+	return total, count, byModel
+}
+
+func applyPeriodFilter(query *gorm.DB, period string) *gorm.DB {
+	now := time.Now()
+	switch period {
+	case "today":
+		start := time.Date(now.Year(), now.Month(), now.Day(), 0, 0, 0, 0, now.Location())
+		return query.Where("created_at >= ?", start)
+	case "week":
+		return query.Where("created_at >= ?", now.AddDate(0, 0, -7))
+	case "month":
+		return query.Where("created_at >= ?", now.AddDate(0, -1, 0))
+	case "all":
+		return query
+	default:
+		// Try parse as date
+		if t, err := time.Parse("2006-01-02", period); err == nil {
+			end := t.AddDate(0, 0, 1)
+			return query.Where("created_at >= ? AND created_at < ?", t, end)
+		}
+		// Default to today
+		start := time.Date(now.Year(), now.Month(), now.Day(), 0, 0, 0, 0, now.Location())
+		return query.Where("created_at >= ?", start)
+	}
+}
+
+// IsClaw402Config checks if a trader config uses claw402 payment provider
+func IsClaw402Config(aiModel string) bool {
+	return aiModel == "claw402"
+}
+
+// EstimateRunway estimates how many days the given USDC balance will last
+func EstimateRunway(usdcBalance float64, modelName string, scanIntervalMinutes int) (dailyCost float64, runwayDays float64) {
+	if scanIntervalMinutes <= 0 {
+		scanIntervalMinutes = 3
+	}
+	callsPerDay := float64(24*60) / float64(scanIntervalMinutes)
+	pricePerCall := GetModelPrice(modelName)
+	dailyCost = callsPerDay * pricePerCall
+	if dailyCost > 0 && usdcBalance > 0 {
+		runwayDays = usdcBalance / dailyCost
+	}
+	return dailyCost, runwayDays
+}

store/store.go

@@ -28,6 +28,7 @@ type Store struct {
 	equity         *EquityStore
 	order          *OrderStore
 	grid           *GridStore
+	aiCharge       *AIChargeStore
 	telegramConfig TelegramConfigStore
 
 	mu sync.RWMutex
@@ -160,6 +161,9 @@ func (s *Store) initTables() error {
 	if err := s.TelegramConfig().(*telegramConfigStore).initTables(); err != nil {
 		return fmt.Errorf("failed to initialize telegram config tables: %w", err)
 	}
+	if err := s.AICharge().initTables(); err != nil {
+		return fmt.Errorf("failed to initialize AI charge tables: %w", err)
+	}
 	return nil
 }
 
@@ -283,6 +287,16 @@ func (s *Store) Grid() *GridStore {
 	return s.grid
 }
 
+// AICharge gets AI charge storage
+func (s *Store) AICharge() *AIChargeStore {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	if s.aiCharge == nil {
+		s.aiCharge = NewAIChargeStore(s.gdb)
+	}
+	return s.aiCharge
+}
+
 // TelegramConfig gets Telegram bot configuration storage
 func (s *Store) TelegramConfig() TelegramConfigStore {
 	s.mu.Lock()

trader/auto_trader.go

@@ -8,6 +8,8 @@ import (
 	_ "nofx/mcp/payment"
 	_ "nofx/mcp/provider"
 	"nofx/store"
+	"nofx/wallet"
+	"github.com/ethereum/go-ethereum/crypto"
 	"nofx/trader/aster"
 	"nofx/trader/binance"
 	"nofx/trader/bitget"
@@ -145,6 +147,7 @@ type AutoTrader struct {
 	lastBalanceSyncTime   time.Time          // Last balance sync time
 	userID                string             // User ID
 	gridState             *GridState         // Grid trading state (only used when StrategyType == "grid_trading")
+	claw402WalletAddr     string             // Claw402 wallet address (derived from private key at start)
 }
 
 // NewAutoTrader creates an automatic trader
@@ -371,6 +374,9 @@ func (at *AutoTrader) Run() error {
 	logger.Infof("💰 Initial balance: %.2f USDT", at.initialBalance)
 	logger.Infof("⚙️  Scan interval: %v", at.config.ScanInterval)
 	logger.Info("🤖 AI will make full decisions on leverage, position size, stop loss/take profit, etc.")
+
+	// Pre-launch checks for claw402 users
+	at.runPreLaunchChecks()
 	at.monitorWg.Add(1)
 	defer at.monitorWg.Done()
 
@@ -587,3 +593,63 @@ func calculatePnLPercentage(unrealizedPnl, marginUsed float64) float64 {
 	}
 	return 0.0
 }
+
+// runPreLaunchChecks performs pre-launch checks for claw402 users (wallet balance, runway estimate)
+func (at *AutoTrader) runPreLaunchChecks() {
+	if !store.IsClaw402Config(at.config.AIModel) {
+		return
+	}
+
+	logger.Info("🔍 Running pre-launch checks (claw402)...")
+
+	// Derive wallet address from CustomAPIKey (which is the private key for claw402)
+	if at.config.CustomAPIKey != "" {
+		// Try to derive address using go-ethereum
+		addr := deriveWalletAddress(at.config.CustomAPIKey)
+		if addr != "" {
+			at.claw402WalletAddr = addr
+			logger.Infof("💳 [%s] Claw402 wallet: %s", at.name, addr)
+
+			// Query USDC balance
+			balance, err := wallet.QueryUSDCBalance(addr)
+			if err != nil {
+				logger.Warnf("⚠️ [%s] Could not query USDC balance: %v", at.name, err)
+			} else {
+				// Estimate runway
+				scanMinutes := int(at.config.ScanInterval.Minutes())
+				modelName := at.config.CustomModelName
+				if modelName == "" {
+					modelName = "deepseek"
+				}
+				dailyCost, runway := store.EstimateRunway(balance, modelName, scanMinutes)
+				logger.Infof("💰 [%s] USDC Balance: $%.2f | Daily AI cost: ~$%.2f | Runway: ~%.1f days",
+					at.name, balance, dailyCost, runway)
+
+				if balance < 1.0 {
+					logger.Warnf("⚠️ [%s] Low USDC balance! Consider topping up.", at.name)
+				}
+				if balance <= 0 {
+					logger.Errorf("🚨 [%s] USDC balance is ZERO — AI calls will fail!", at.name)
+				}
+			}
+		}
+	}
+
+	logger.Info("✅ Pre-launch checks complete")
+}
+
+// deriveWalletAddress derives an Ethereum address from a hex private key
+func deriveWalletAddress(privateKeyHex string) string {
+	// Remove 0x prefix if present
+	if len(privateKeyHex) > 2 && privateKeyHex[:2] == "0x" {
+		privateKeyHex = privateKeyHex[2:]
+	}
+
+	privateKey, err := crypto.HexToECDSA(privateKeyHex)
+	if err != nil {
+		return ""
+	}
+
+	address := crypto.PubkeyToAddress(privateKey.PublicKey)
+	return address.Hex()
+}

trader/auto_trader_loop.go

@@ -6,6 +6,7 @@ import (
 	"nofx/kernel"
 	"nofx/logger"
 	"nofx/store"
+	"nofx/wallet"
 	"strings"
 	"time"
 )
@@ -27,6 +28,11 @@ func (at *AutoTrader) runCycle() error {
 		return nil
 	}
 
+	// Check USDC balance periodically for claw402 users (every 10 cycles)
+	if at.callCount%10 == 0 && store.IsClaw402Config(at.config.AIModel) {
+		at.checkClaw402Balance()
+	}
+
 	// Create decision record
 	record := &store.DecisionRecord{
 		ExecutionLog: []string{},
@@ -110,6 +116,13 @@ func (at *AutoTrader) runCycle() error {
 		}
 	}
 
+	// Record AI charge (track cost regardless of decision outcome)
+	if aiDecision != nil && at.store != nil {
+		if chargeErr := at.store.AICharge().Record(at.id, at.aiModel, at.config.AIModel); chargeErr != nil {
+			logger.Warnf("⚠️ Failed to record AI charge: %v", chargeErr)
+		}
+	}
+
 	if err != nil {
 		record.Success = false
 		record.ErrorMessage = fmt.Sprintf("Failed to get AI decision: %v", err)
@@ -558,3 +571,36 @@ func sortDecisionsByPriority(decisions []kernel.Decision) []kernel.Decision {
 
 	return sorted
 }
+
+// checkClaw402Balance checks USDC balance and logs warnings if low
+func (at *AutoTrader) checkClaw402Balance() {
+	scanMinutes := int(at.config.ScanInterval.Minutes())
+	if scanMinutes <= 0 {
+		scanMinutes = 3
+	}
+	dailyCost, _ := store.EstimateRunway(1.0, at.config.CustomModelName, scanMinutes)
+	logger.Infof("💰 [%s] Estimated daily AI cost: ~$%.2f (model: %s, interval: %dm)",
+		at.name, dailyCost, at.config.CustomModelName, scanMinutes)
+
+	if at.claw402WalletAddr != "" {
+		balance, err := wallet.QueryUSDCBalance(at.claw402WalletAddr)
+		if err != nil {
+			logger.Warnf("⚠️ [%s] Failed to query USDC balance: %v", at.name, err)
+			return
+		}
+
+		if balance < 1.0 {
+			logger.Warnf("⚠️ [%s] Low USDC balance: $%.2f — AI may stop soon!", at.name, balance)
+		}
+		if balance <= 0 {
+			logger.Errorf("🚨 [%s] USDC balance is ZERO — AI calls will fail!", at.name)
+		}
+
+		runway := float64(0)
+		if dailyCost > 0 {
+			runway = balance / dailyCost
+		}
+		logger.Infof("💰 [%s] USDC Balance: $%.2f | Daily AI cost: ~$%.2f | Runway: ~%.1f days",
+			at.name, balance, dailyCost, runway)
+	}
+}

wallet/usdc.go

@@ -0,0 +1,91 @@
+// Package wallet provides shared wallet utilities (USDC balance queries, etc.)
+package wallet
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"math/big"
+	"net/http"
+	"strings"
+	"time"
+)
+
+const (
+	BaseRPCURL       = "https://mainnet.base.org"
+	USDCContractBase = "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
+	USDCDecimals     = 6
+)
+
+// QueryUSDCBalance queries USDC balance on Base chain and returns as float64
+func QueryUSDCBalance(address string) (float64, error) {
+	balanceStr := QueryUSDCBalanceStr(address)
+	var balance float64
+	_, err := fmt.Sscanf(balanceStr, "%f", &balance)
+	if err != nil {
+		return 0, fmt.Errorf("failed to parse balance: %w", err)
+	}
+	return balance, nil
+}
+
+// QueryUSDCBalanceStr queries USDC balance on Base chain and returns as formatted string
+func QueryUSDCBalanceStr(address string) string {
+	// Build balanceOf(address) call data
+	// Function selector: 0x70a08231
+	addrNoPre := strings.TrimPrefix(strings.ToLower(address), "0x")
+	data := "0x70a08231" + fmt.Sprintf("%064s", addrNoPre)
+
+	payload := map[string]interface{}{
+		"jsonrpc": "2.0",
+		"method":  "eth_call",
+		"params": []interface{}{
+			map[string]string{
+				"to":   USDCContractBase,
+				"data": data,
+			},
+			"latest",
+		},
+		"id": 1,
+	}
+
+	body, err := json.Marshal(payload)
+	if err != nil {
+		return "0.00"
+	}
+
+	client := &http.Client{Timeout: 10 * time.Second}
+	resp, err := client.Post(BaseRPCURL, "application/json", bytes.NewReader(body))
+	if err != nil {
+		return "0.00"
+	}
+	defer resp.Body.Close()
+
+	respBody, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return "0.00"
+	}
+
+	var rpcResp struct {
+		Result string `json:"result"`
+	}
+	if err := json.Unmarshal(respBody, &rpcResp); err != nil {
+		return "0.00"
+	}
+
+	// Parse hex result
+	hexStr := strings.TrimPrefix(rpcResp.Result, "0x")
+	if hexStr == "" || hexStr == "0" {
+		return "0.00"
+	}
+
+	balance := new(big.Int)
+	balance.SetString(hexStr, 16)
+
+	// Convert to float with 6 decimals
+	divisor := new(big.Int).Exp(big.NewInt(10), big.NewInt(USDCDecimals), nil)
+	whole := new(big.Int).Div(balance, divisor)
+	remainder := new(big.Int).Mod(balance, divisor)
+
+	return fmt.Sprintf("%d.%06d", whole, remainder)
+}

web/package-lock.json

@@ -18,6 +18,7 @@
         "katex": "^0.16.27",
         "lightweight-charts": "^5.1.0",
         "lucide-react": "^0.552.0",
+        "qrcode.react": "^4.2.0",
         "react": "^18.3.1",
         "react-dom": "^18.3.1",
         "react-password-checklist": "^1.8.1",
@@ -6837,6 +6838,15 @@
         "node": ">=6"
       }
     },
+    "node_modules/qrcode.react": {
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/qrcode.react/-/qrcode.react-4.2.0.tgz",
+      "integrity": "sha512-QpgqWi8rD9DsS9EP3z7BT+5lY5SFhsqGjpgW5DY/i3mK4M9DTBNz3ErMi8BWYEfI3L0d8GIbGmcdFAS1uIRGjA==",
+      "license": "ISC",
+      "peerDependencies": {
+        "react": "^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0"
+      }
+    },
     "node_modules/queue-microtask": {
       "version": "1.2.3",
       "resolved": "https://registry.npmjs.org/queue-microtask/-/queue-microtask-1.2.3.tgz",

web/package.json

@@ -24,6 +24,7 @@
     "katex": "^0.16.27",
     "lightweight-charts": "^5.1.0",
     "lucide-react": "^0.552.0",
+    "qrcode.react": "^4.2.0",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
     "react-password-checklist": "^1.8.1",

web/src/components/trader/ModelConfigModal.tsx

@@ -1,4 +1,5 @@
 import React, { useState, useEffect } from 'react'
+import { QRCodeSVG } from 'qrcode.react'
 import { Trash2, Brain, ExternalLink } from 'lucide-react'
 import type { AIModel } from '../../types'
 import type { Language } from '../../i18n/translations'
@@ -298,6 +299,10 @@ function Claw402ConfigForm({
   language: Language
 }) {
   const [walletAddress, setWalletAddress] = useState('')
+  const [copiedAddr, setCopiedAddr] = useState(false)
+  const [showDeposit, setShowDeposit] = useState(false)
+  const [showNewWalletBackup, setShowNewWalletBackup] = useState(false)
+  const [newWalletKey, setNewWalletKey] = useState('')
   const [usdcBalance, setUsdcBalance] = useState<string | null>(null)
   const [keyError, setKeyError] = useState('')
   const [validating, setValidating] = useState(false)
@@ -317,7 +322,7 @@ function Claw402ConfigForm({
   const isKeyValid = apiKey.length === 66 && apiKey.startsWith('0x') && /^0x[0-9a-fA-F]{64}$/.test(apiKey)
 
   // Truncate address for display
-  const truncAddr = (addr: string) => addr ? `${addr.slice(0, 6)}...${addr.slice(-4)}` : ''
+
 
   // Debounced validation when apiKey changes
   useEffect(() => {
@@ -375,6 +380,7 @@ function Claw402ConfigForm({
         setWalletAddress(data.address || '')
         setUsdcBalance(data.balance_usdc || '0.00')
         setClaw402Status(data.claw402_status || 'unknown')
+        if (parseFloat(data.balance_usdc || '0') === 0) setShowDeposit(true)
         setTestResult({
           status: data.claw402_status === 'ok' ? 'ok' : 'error',
           message: data.claw402_status === 'ok'
@@ -446,6 +452,9 @@ function Claw402ConfigForm({
                   <div className="text-[10px] truncate" style={{ color: '#848E9C' }}>
                     {m.provider} · {m.desc}
                   </div>
+                  <div className="text-[10px]" style={{ color: '#00E096' }}>
+                    ~${m.price}/call
+                  </div>
                 </div>
                 {isSelected && (
                   <span className="text-[10px] mt-1" style={{ color: '#60A5FA' }}>✓</span>
@@ -485,19 +494,78 @@ function Claw402ConfigForm({
           <div className="text-xs font-medium" style={{ color: '#A0AEC0' }}>
             {t('modelConfig.walletPrivateKey', language)}
           </div>
-          <input
-            type="password"
-            value={apiKey}
-            onChange={(e) => onApiKeyChange(e.target.value)}
-            placeholder="0x..."
-            className="w-full px-4 py-3 rounded-xl font-mono text-sm"
-            style={{
-              background: '#0B0E11',
-              border: keyError ? '1px solid #EF4444' : walletAddress ? '1px solid #00E096' : '1px solid #2B3139',
-              color: '#EAECEF',
-            }}
-            required
-          />
+          <div className="flex gap-2">
+            <input
+              type="password"
+              value={apiKey}
+              onChange={(e) => onApiKeyChange(e.target.value)}
+              placeholder="0x..."
+              className="flex-1 px-4 py-3 rounded-xl font-mono text-sm"
+              style={{
+                background: '#0B0E11',
+                border: keyError ? '1px solid #EF4444' : walletAddress ? '1px solid #00E096' : '1px solid #2B3139',
+                color: '#EAECEF',
+              }}
+              required
+            />
+            {!apiKey && (
+              <button
+                type="button"
+                onClick={async () => {
+                  try {
+                    const res = await fetch('/api/wallet/generate', { method: 'POST' })
+                    const data = await res.json()
+                    if (data.private_key) {
+                      onApiKeyChange(data.private_key)
+                      setShowNewWalletBackup(true)
+                      setNewWalletKey(data.private_key)
+                    }
+                  } catch { /* ignore */ }
+                }}
+                className="shrink-0 px-3 py-3 rounded-xl text-xs font-semibold transition-all hover:scale-[1.02]"
+                style={{ background: 'linear-gradient(135deg, #2563EB, #7C3AED)', color: '#fff', border: 'none', cursor: 'pointer' }}
+              >
+                {language === 'zh' ? '🔑 创建钱包' : '🔑 Create Wallet'}
+              </button>
+            )}
+          </div>
+
+          {/* New wallet backup warning */}
+          {showNewWalletBackup && newWalletKey && (
+            <div className="p-3 rounded-xl" style={{ background: 'rgba(239, 68, 68, 0.08)', border: '1px solid rgba(239, 68, 68, 0.3)' }}>
+              <div className="text-xs font-bold mb-2" style={{ color: '#EF4444' }}>
+                🚨 {language === 'zh' ? '重要：请立即备份私钥！' : 'Important: Backup your private key NOW!'}
+              </div>
+              <div className="text-[11px] mb-2" style={{ color: '#F87171' }}>
+                {language === 'zh'
+                  ? '这是你的钱包私钥，丢失后无法恢复，钱包里的资产将永久丢失。请复制并安全保存。'
+                  : 'This is your wallet private key. If lost, it cannot be recovered and all assets will be permanently lost. Copy and save it securely.'}
+              </div>
+              <div className="flex items-center gap-2 mb-2">
+                <code className="text-[10px] font-mono break-all select-all flex-1 p-2 rounded" style={{ background: '#0B0E11', color: '#F87171' }}>
+                  {newWalletKey}
+                </code>
+                <button
+                  type="button"
+                  onClick={() => {
+                    navigator.clipboard.writeText(newWalletKey)
+                    setCopiedAddr(true)
+                    setTimeout(() => setCopiedAddr(false), 2000)
+                  }}
+                  className="shrink-0 text-[10px] px-2 py-1 rounded"
+                  style={{ background: 'rgba(239,68,68,0.15)', color: '#F87171', border: 'none', cursor: 'pointer' }}
+                >
+                  {copiedAddr ? '✅ Copied' : '📋 Copy Key'}
+                </button>
+              </div>
+              <div className="text-[10px] space-y-1" style={{ color: '#848E9C' }}>
+                <div>✅ {language === 'zh' ? '建议保存到密码管理器（1Password / Bitwarden）' : 'Save to a password manager (1Password / Bitwarden)'}</div>
+                <div>✅ {language === 'zh' ? '或抄在纸上放安全的地方' : 'Or write it down and store it safely'}</div>
+                <div>❌ {language === 'zh' ? '不要截图发给别人' : 'Do NOT screenshot or share with anyone'}</div>
+              </div>
+            </div>
+          )}
+
           <div className="flex items-start gap-1.5 text-[11px]" style={{ color: '#848E9C' }}>
             <span className="mt-px">🔒</span>
             <span>
@@ -528,20 +596,81 @@ function Claw402ConfigForm({
             {/* Success: address + balance + status */}
             {walletAddress && !validating && !keyError && (
               <>
-                <div className="flex items-center gap-2 text-xs" style={{ color: '#00E096' }}>
-                  <span>✅</span>
-                  <span>{t('modelConfig.walletAddress', language)}: <span className="font-mono">{truncAddr(walletAddress)}</span></span>
+                <div className="p-2.5 rounded-lg" style={{ background: 'rgba(96,165,250,0.06)', border: '1px solid rgba(96,165,250,0.15)' }}>
+                  <div className="flex items-center justify-between mb-1">
+                    <span className="text-[11px]" style={{ color: '#A0AEC0' }}>
+                      {t('modelConfig.walletAddress', language)}:
+                    </span>
+                    <button
+                      type="button"
+                      onClick={() => {
+                        navigator.clipboard.writeText(walletAddress)
+                        setCopiedAddr(true)
+                        setTimeout(() => setCopiedAddr(false), 2000)
+                      }}
+                      className="text-[10px] px-1.5 py-0.5 rounded"
+                      style={{ background: 'rgba(96,165,250,0.1)', color: '#60A5FA', border: 'none', cursor: 'pointer' }}
+                    >
+                      {copiedAddr ? '✅' : '📋'}
+                    </button>
+                  </div>
+                  <code className="text-[11px] font-mono block select-all" style={{ color: '#60A5FA' }}>{walletAddress}</code>
+                  <div className="text-[10px] mt-1.5" style={{ color: '#F59E0B' }}>
+                    ⚠️ {language === 'zh' ? '请确认这是你的钱包地址（可在 MetaMask 中核对）' : 'Please confirm this is your wallet address (verify in MetaMask)'}
+                  </div>
                 </div>
                 {usdcBalance !== null && (
-                  <div className="flex items-center gap-2 text-xs" style={{ color: balanceNum > 0 ? '#00E096' : '#F59E0B' }}>
+                  <div className="flex items-center gap-2 text-xs">
                     <span>💰</span>
-                    <span>{t('modelConfig.usdcBalance', language)}: ${usdcBalance}</span>
+                    <span style={{ color: balanceNum > 0 ? '#00E096' : '#F59E0B' }}>
+                      {t('modelConfig.usdcBalance', language)}: ${usdcBalance}
+                    </span>
+                    <button
+                      type="button"
+                      onClick={() => setShowDeposit(!showDeposit)}
+                      className="text-[10px] px-2 py-0.5 rounded transition-all"
+                      style={{ background: 'rgba(0,224,150,0.1)', color: '#00E096', border: 'none', cursor: 'pointer' }}
+                    >
+                      {showDeposit
+                        ? (language === 'zh' ? '收起' : 'Hide')
+                        : (language === 'zh' ? '💳 充值' : '💳 Deposit')}
+                    </button>
                   </div>
                 )}
-                {balanceNum === 0 && usdcBalance !== null && (
-                  <div className="flex items-center gap-2 text-[11px] pl-5" style={{ color: '#F59E0B' }}>
-                    <span>👉</span>
-                    {t('modelConfig.depositUsdc', language)}
+                {showDeposit && (
+                  <div className="p-3 rounded-xl mt-1" style={{ background: 'rgba(0, 224, 150, 0.04)', border: '1px solid rgba(0, 224, 150, 0.15)' }}>
+                    <div className="text-xs font-semibold mb-2" style={{ color: '#00E096' }}>
+                      💳 {language === 'zh' ? '充值 USDC (Base 链)' : 'Deposit USDC (Base Chain)'}
+                    </div>
+                    <div className="flex gap-3 items-start mb-3">
+                      <div className="shrink-0 p-1.5 rounded-lg" style={{ background: '#fff' }}>
+                        <QRCodeSVG value={walletAddress} size={80} level="M" />
+                      </div>
+                      <div className="flex-1 min-w-0">
+                        <div className="text-[11px] mb-1" style={{ color: '#A0AEC0' }}>
+                          {language === 'zh' ? '扫码或复制地址转账' : 'Scan QR or copy address to transfer'}
+                        </div>
+                        <code className="text-[10px] font-mono break-all select-all block mb-1.5" style={{ color: '#60A5FA' }}>{walletAddress}</code>
+                        <button
+                          type="button"
+                          onClick={() => {
+                            navigator.clipboard.writeText(walletAddress)
+                            setCopiedAddr(true)
+                            setTimeout(() => setCopiedAddr(false), 2000)
+                          }}
+                          className="text-[10px] px-2 py-0.5 rounded"
+                          style={{ background: 'rgba(96,165,250,0.1)', color: '#60A5FA', border: 'none', cursor: 'pointer' }}
+                        >
+                          {copiedAddr ? '✅ Copied' : '📋 Copy Address'}
+                        </button>
+                      </div>
+                    </div>
+                    <div className="text-[10px] space-y-1" style={{ color: '#848E9C' }}>
+                      <div>📱 {language === 'zh' ? '用交易所 App 扫描二维码直接转账' : 'Scan QR with exchange app to transfer'}</div>
+                      <div>• {language === 'zh' ? '提币时网络选择 Base' : 'Choose Base network when withdrawing'}</div>
+                      <div>• {language === 'zh' ? '或跨链桥: ' : 'Or bridge: '}<a href="https://bridge.base.org" target="_blank" rel="noopener" className="underline" style={{ color: '#60A5FA' }}>bridge.base.org</a></div>
+                      <div>• {language === 'zh' ? '最低充值 $1 USDC 即可开始' : 'Min $1 USDC to start'}</div>
+                    </div>
                   </div>
                 )}
                 {claw402Status && (

web/src/components/trader/model-constants.ts

@@ -12,6 +12,7 @@ export interface Claw402Model {
   provider: string
   desc: string
   icon: string
+  price: number  // USD per call
 }
 
 export interface AIProviderConfig {
@@ -52,18 +53,20 @@ export const BLOCKRUN_MODELS: BlockrunModel[] = [
 
 // Models available through Claw402 (x402 USDC payment protocol)
 export const CLAW402_MODELS: Claw402Model[] = [
-  { id: 'gpt-5.4', name: 'GPT-5.4', provider: 'OpenAI', desc: 'Flagship · Fast', icon: '⚡' },
-  { id: 'gpt-5.4-pro', name: 'GPT-5.4 Pro', provider: 'OpenAI', desc: 'Reasoning · Pro', icon: '🧠' },
-  { id: 'gpt-5.3', name: 'GPT-5.3', provider: 'OpenAI', desc: 'Balanced', icon: '💡' },
-  { id: 'gpt-5-mini', name: 'GPT-5 Mini', provider: 'OpenAI', desc: 'Fast · Cheap', icon: '🚀' },
-  { id: 'claude-opus', name: 'Claude Opus', provider: 'Anthropic', desc: 'Flagship · Deep', icon: '🎯' },
-  { id: 'deepseek', name: 'DeepSeek V3', provider: 'DeepSeek', desc: 'Best Value', icon: '🔥' },
-  { id: 'deepseek-reasoner', name: 'DeepSeek R1', provider: 'DeepSeek', desc: 'Reasoning', icon: '🤔' },
-  { id: 'qwen-max', name: 'Qwen Max', provider: 'Alibaba', desc: 'Flagship', icon: '🌟' },
-  { id: 'qwen-plus', name: 'Qwen Plus', provider: 'Alibaba', desc: 'Balanced', icon: '✨' },
-  { id: 'grok-4.1', name: 'Grok 4.1', provider: 'xAI', desc: 'Flagship', icon: '⚡' },
-  { id: 'gemini-3.1-pro', name: 'Gemini 3.1 Pro', provider: 'Google', desc: 'Flagship', icon: '💎' },
-  { id: 'kimi-k2.5', name: 'Kimi K2.5', provider: 'Moonshot', desc: 'Balanced', icon: '🌙' },
+  { id: 'deepseek', name: 'DeepSeek V3', provider: 'DeepSeek', desc: '$0.003/call', icon: '🔥', price: 0.003 },
+  { id: 'deepseek-reasoner', name: 'DeepSeek R1', provider: 'DeepSeek', desc: '$0.005/call', icon: '🤔', price: 0.005 },
+  { id: 'gpt-5-mini', name: 'GPT-5 Mini', provider: 'OpenAI', desc: '$0.005/call', icon: '🚀', price: 0.005 },
+  { id: 'qwen-turbo', name: 'Qwen Turbo', provider: 'Alibaba', desc: '$0.002/call', icon: '⚡', price: 0.002 },
+  { id: 'qwen-flash', name: 'Qwen Flash', provider: 'Alibaba', desc: '$0.002/call', icon: '⚡', price: 0.002 },
+  { id: 'qwen-plus', name: 'Qwen Plus', provider: 'Alibaba', desc: '$0.005/call', icon: '✨', price: 0.005 },
+  { id: 'kimi-k2.5', name: 'Kimi K2.5', provider: 'Moonshot', desc: '$0.008/call', icon: '🌙', price: 0.008 },
+  { id: 'gpt-5.3', name: 'GPT-5.3', provider: 'OpenAI', desc: '$0.01/call', icon: '💡', price: 0.01 },
+  { id: 'qwen-max', name: 'Qwen Max', provider: 'Alibaba', desc: '$0.01/call', icon: '🌟', price: 0.01 },
+  { id: 'gemini-3.1-pro', name: 'Gemini 3.1 Pro', provider: 'Google', desc: '$0.03/call', icon: '💎', price: 0.03 },
+  { id: 'gpt-5.4', name: 'GPT-5.4', provider: 'OpenAI', desc: '$0.05/call', icon: '⚡', price: 0.05 },
+  { id: 'grok-4.1', name: 'Grok 4.1', provider: 'xAI', desc: '$0.06/call', icon: '⚡', price: 0.06 },
+  { id: 'claude-opus', name: 'Claude Opus', provider: 'Anthropic', desc: '$0.12/call', icon: '🎯', price: 0.12 },
+  { id: 'gpt-5.4-pro', name: 'GPT-5.4 Pro', provider: 'OpenAI', desc: '$0.50/call', icon: '🧠', price: 0.50 },
 ]
 
 // AI Provider configuration - default models and API links