deving

internal/logic/open.go

@@ -0,0 +1,89 @@
+package logic
+
+import (
+	"context"
+	"errors"
+	"log"
+	"strconv"
+	"time"
+
+	"git.apinb.com/quant/coin/internal/impl"
+	"git.apinb.com/quant/coin/internal/models"
+	binance "github.com/adshao/go-binance/v2"
+)
+
+// OpenPosition 按交易对用配置的 OrderQtyUsdt 市价买入首笔；更新内存、写入数据库并 loadPortfolio 刷新持仓缓存。
+// 若链上可用基础币名义已达「有仓」阈值则只同步数量与成本写库，不再重复下单。
+func CreateNewSpotPosition(symbol string) error {
+	ctx, cancel := context.WithTimeout(context.Background(), 45*time.Second)
+	defer cancel()
+
+	if err := RefreshAccount(); err != nil {
+		return err
+	} else {
+		account := GetAccount("USDT")
+		if account <= 10 {
+			return errors.New("USDT 余额不足")
+		}
+	}
+
+	qty, err := CalculateQty(symbol)
+	if err != nil {
+		return err
+	}
+
+	order, err := BinanceClient.NewCreateOrderService().
+		Symbol(symbol).
+		Side(binance.SideTypeBuy).
+		Type(binance.OrderTypeMarket).
+		Quantity(qty).
+		NewOrderRespType(binance.NewOrderRespTypeRESULT).
+		Do(ctx)
+	if err != nil {
+		return err
+	}
+
+	position := &models.SpotPosition{
+		BaseAsset:   spotBaseFromSymbol(symbol),
+		Symbol:      symbol,
+		Quantity:    parseFloat(order.ExecutedQuantity),
+		AvgCostUSDT: parseFloat(order.Price),
+	}
+
+	if err := impl.DBService.Create(position).Error; err != nil {
+		return err
+	}
+
+	if err := loadPortfolio(); err != nil {
+		log.Printf("logic: OpenPosition 刷新持仓缓存失败: %v", err)
+	}
+
+	return nil
+}
+
+func CalculateQty(symbol string) (string, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), 45*time.Second)
+	defer cancel()
+	prices, err := BinanceClient.NewListPricesService().Symbol(symbol).Do(ctx)
+	if err != nil || len(prices) == 0 {
+		return "", err
+	}
+	price, err := strconv.ParseFloat(prices[0].Price, 64)
+	if err != nil || price <= 0 {
+		return "", errors.New("现价无效")
+	}
+	cfg := getSymbolInfo(symbol)
+	if cfg == nil {
+		return "", errors.New("交易对不存在")
+	}
+	want := InvestUsdt[cfg.Symbol] / price
+	step := cfg.LotSizeFilter().StepSize
+	qtyStr, ok, err := formatQtyToLotStep(want, step)
+	if err != nil {
+		return "", err
+	}
+	if !ok {
+		return "", errors.New("数量不足")
+	}
+	return qtyStr, nil
+}