add log-system, bug fixed

internal/utils/utils.go

@@ -78,9 +78,24 @@ func Float64ToBigInt(symbol string, amount float64) *big.Int {
 		log.Printf("don`t support symbol: %s", symbol)
 		return nil
 	}
-	bigAmount := new(big.Int)
-	bigAmount.SetInt64(int64(amount * scale))
-	return bigAmount
+
+	// 检查 amount 是否为负数
+	if amount < 0 {
+		log.Printf("Warning: negative amount for symbol %s: %f", symbol, amount)
+		amount = 0 // 可以选择将负数设置为 0 或返回错误
+	}
+
+	// 将 amount 转换为 big.Float 来避免溢出
+	bigAmount := new(big.Float)
+	bigAmount.SetFloat64(amount)
+
+	// 乘以 scale（小数位数），避免精度丢失
+	bigAmount = bigAmount.Mul(bigAmount, big.NewFloat(scale))
+
+	// 将 big.Float 转换为 big.Int（取整）
+	intAmount, _ := bigAmount.Int(nil)
+
+	return intAmount
 }
 
 func BigIntToFloat64(symbol string, amount *big.Int) float64 {