diff --git a/commission.go b/commission.go
new file mode 100644
index 0000000..4681e79
--- /dev/null
+++ b/commission.go
@@ -0,0 +1,234 @@
+/**
+ * 计算佣金
+ * 2020/05/22
+ */
+package ordercalc
+
+import (
+	"errors"
+
+	"strings"
+)
+
+/**
+ * 计算某一商品对分销商的分销价
+ * @param business 分销商信息
+ * @param productSpecialPrice 分销特殊价格
+ * @param distributionPrice 基础分销价
+ * @param percentage 分销比例
+ * @param productPrice 商品销售价
+ * 2020/05/22
+ * gz
+ */
+func DistributionPrice(business map[string]string, productSpecialPrice []map[string]string, distributionPrice interface{}, percentAge interface{}, productPrice interface{}) (float64, error) {
+
+	product_price := ToString(productPrice)
+
+	if len(business) < 1 {
+		return 0, errors.New("参数错误")
+	}
+
+	_, idExist := business["Id"]
+	_, levelIdExist := business["LevelId"]
+	if !idExist || !levelIdExist {
+		return 0, errors.New("分销商参数错误")
+	}
+
+	distribution_price := ToString(distributionPrice)
+	distribution_price_float, err := ToFloat64(distributionPrice)
+	if err != nil {
+		return 0, err
+	}
+
+	percent_age := ToString(percentAge)
+
+	if len(productSpecialPrice) < 1 && percent_age == "" {
+		return distribution_price_float, nil //没有特殊价格，没有分销比例，返回原分销价
+	}
+
+	var formula string                //分销价计算公式
+	var is_special_price bool = false //是否使用特殊价格方式，因特殊价格中可能只能会员价，记录以供再次判断
+
+	var ok bool
+
+	if len(productSpecialPrice) > 0 { //特殊价格方式
+		is_special_price = true //有一条特殊价格，则是使用特殊价
+		for _, item := range productSpecialPrice {
+			if _, ok = item["BusinessId"]; ok {
+				if item["BusinessId"] != "0" && item["BusinessId"] == business["Id"] {
+					formula = item["DistributionPrice"]
+					break
+				}
+			}
+			if _, ok = item["BusinessLevelId"]; ok {
+				if item["BusinessLevelId"] != "0" && item["BusinessLevelId"] == business["LevelId"] {
+					formula = item["DistributionPrice"]
+				}
+			}
+		}
+	}
+
+	var price []string
+	var result float64 = 0 //最终分销价
+
+	if is_special_price {
+
+		if formula != "" {
+			formula = strings.Replace(formula, "#distribution_price#", distribution_price, 1)
+		} else {
+			formula = distribution_price
+		}
+
+		//计算表达式
+
+		switch {
+		case strings.Contains(formula, "+"):
+			price = strings.Split(formula, "+")
+			result = FloatAdd(price[0], price[1])
+		case strings.Contains(formula, "-"):
+			price = strings.Split(formula, "-")
+			result = FloatSub(price[0], price[1])
+		case strings.Contains(formula, "*"):
+			price = strings.Split(formula, "*")
+			result = FloatMul(price[0], price[1], 2)
+		case strings.Contains(formula, "/"):
+			price = strings.Split(formula, "/")
+			result = FloatQuo(price[0], price[1], 2)
+		default:
+			//使用固定价格或者使用基础分销价
+			if formula != "" {
+				result, _ = ToFloat64(formula)
+			} else {
+				result = distribution_price_float
+			}
+		}
+	} else {
+		//使用分销比例
+		if product_price == "" {
+			return 0, errors.New("商品价格错误")
+		}
+		price = strings.Split(percent_age, ":")
+		totalCommission := FloatSub(productPrice, distributionPrice) //总佣金
+
+		if totalCommission <= 0 {
+			return ToFloat64(productPrice) //总佣金为负，返回商品原价
+		}
+
+		if _, ok = business["Grade"]; ok {
+			level_count := len(price)                  //分销级数
+			var totalPercent, cent, commission float64 //总分配份数,分销比例,获得的佣金
+			switch level_count {
+			case 3:
+				totalPercent = FloatAdd(price[0], price[1], price[2])
+				if totalPercent <= 0 {
+					result = distribution_price_float //佣金分配比例为0，返回基础分销价
+				} else {
+					switch business["Grade"] {
+					case "1":
+						//一级分销商得到所有佣金
+						cent = 1 //分销比例
+					case "2":
+						//二级分销商得到所有佣金
+						cent = FloatQuo(FloatAdd(price[0], price[1]), totalPercent) //分销比例
+					case "0", "3":
+						//三级或无级别分销商得到所有佣金
+						cent = FloatQuo(price[0], totalPercent) //分销比例
+					}
+					commission = FloatMul(totalCommission, cent, 2)
+
+					result = FloatSub(productPrice, commission) //分销价＝商品价－佣金
+				}
+			case 2:
+				totalPercent = FloatAdd(price[0], price[1])
+				if totalPercent <= 0 {
+					result = distribution_price_float //佣金分配比例为0，返回基础分销价
+				} else {
+					switch business["Grade"] {
+					case "1":
+						//一级分销商得到所有佣金
+						cent = 1 //分销比例
+					case "0", "2":
+						//二级或无级别分销商得到所有佣金
+						cent = FloatQuo(price[0], totalPercent) //分销比例
+					}
+					commission = FloatMul(totalCommission, cent, 2)
+					result = FloatSub(productPrice, commission) //分销价＝商品价－佣金
+				}
+			case 1:
+				//只有一级
+				result = distribution_price_float
+			}
+
+		} else {
+			return 0, errors.New("分销商参数错误，没有分销级别")
+		}
+	}
+
+	if result < 0 {
+		result, _ = ToFloat64(productPrice)
+	}
+	return result, nil
+}
+
+/**
+ * 计算某一商品的VIP价
+ * @param productSpecialPrice 特殊价格
+ * @param productPrice 商品销售价
+ * 2020/06/05
+ * gz
+ */
+func VipPrice(productSpecialPrice []map[string]string, productPrice interface{}) (float64, error) {
+
+	product_price := ToString(productPrice)
+
+	product_price_float, _ := ToFloat64(productPrice)
+
+	if len(productSpecialPrice) < 1 {
+		return product_price_float, nil //没有特殊价格，返回原价
+	}
+
+	var formula string //VIP价计算公式
+
+	var ok bool
+
+	for _, item := range productSpecialPrice {
+
+		if _, ok = item["RetailPrice"]; ok {
+			if item["RetailPrice"] != "" {
+				formula = item["RetailPrice"]
+				break
+			}
+		}
+	}
+
+	if formula != "" {
+		formula = strings.Replace(formula, "#retail_price#", product_price, 1)
+	} else {
+		formula = product_price
+	}
+	//计算表达式
+
+	var price []string
+	var result float64 = 0 //最终VIP价
+	switch {
+	case strings.Contains(formula, "+"):
+		price = strings.Split(formula, "+")
+		result = FloatAdd(price[0], price[1])
+	case strings.Contains(formula, "-"):
+		price = strings.Split(formula, "-")
+		result = FloatSub(price[0], price[1])
+	case strings.Contains(formula, "*"):
+		price = strings.Split(formula, "*")
+		result = FloatMul(price[0], price[1], 2)
+	case strings.Contains(formula, "/"):
+		price = strings.Split(formula, "/")
+		result = FloatQuo(price[0], price[1], 2)
+	default:
+		result = product_price_float
+	}
+
+	if result < 0 || result > product_price_float {
+		result = product_price_float
+	}
+	return result, nil
+}
diff --git a/commission_test.go b/commission_test.go
new file mode 100644
index 0000000..1be751a
--- /dev/null
+++ b/commission_test.go
@@ -0,0 +1,37 @@
+package ordercalc
+
+import (
+	"testing"
+)
+
+func Test_DistributionPrice(t *testing.T) {
+	business := map[string]string{"Id": "4", "LevelId": "3", "Grade": "3"}
+	productSpecialPrice := make([]map[string]string, 0)
+
+	price := make(map[string]string)
+	price["BusinessId"] = "0"
+	price["BusinessLevelId"] = "2"
+	// price["DistributionPrice"] = "#distribution_price#+5"
+	price["DistributionPrice"] = "0.05"
+
+	// productSpecialPrice = append(productSpecialPrice, price)
+
+	price = make(map[string]string)
+	price["BusinessId"] = "0"
+	price["BusinessLevelId"] = "3"
+	price["DistributionPrice"] = "0.05"
+
+	// productSpecialPrice = append(productSpecialPrice, price)
+
+	price = make(map[string]string)
+	price["BusinessId"] = "0"
+	price["BusinessLevelId"] = ""
+	price["DistributionPrice"] = "12"
+
+	// productSpecialPrice = append(productSpecialPrice, price)
+
+	dis, err := DistributionPrice(business, productSpecialPrice, 0.07, "7:2:1", 0.5)
+
+	t.Log(dis)
+	t.Log(err)
+}
diff --git a/order_sign.go b/order_sign.go
new file mode 100644
index 0000000..12eb663
--- /dev/null
+++ b/order_sign.go
@@ -0,0 +1,41 @@
+package ordercalc
+
+import (
+	"crypto/md5"
+	"encoding/hex"
+	"strings"
+)
+
+/**
+ * 通知订单状态时签名
+ * 签名方式：md5(order_sn-status--time---appid)
+ * 2020/08/21
+ *gz
+ */
+func Sign(order_sn, status, time, appid string) string {
+	return Md5Password(StringJoin(order_sn, "--", status, "--", time, "--", appid))
+}
+
+//密码加密
+func Md5Password(password string) string {
+	h := md5.New()
+	h.Write([]byte(password)) // 需要加密的字符串
+	cipher2Str := h.Sum(nil)
+	sMd5 := hex.EncodeToString(cipher2Str) // 输出加密结果
+	return sMd5
+}
+
+/*
+ * 连接多个字符串
+ * 2019/05/05
+ */
+func StringJoin(s ...string) string {
+	var build strings.Builder
+	if len(s) > 0 {
+		for _, v := range s {
+			build.WriteString(v)
+		}
+	}
+
+	return build.String()
+}
diff --git a/order_sn.go b/order_sn.go
new file mode 100644
index 0000000..15a7602
--- /dev/null
+++ b/order_sn.go
@@ -0,0 +1,69 @@
+package ordercalc
+
+import (
+	"math/rand"
+	"strconv"
+	"strings"
+	"time"
+)
+
+/**
+ * 订单号规则
+ * id后4位（随机4位）+当前时间（10位）
+ * 2020/08/10
+ */
+func NewOrderSn(user_id string) string {
+	var prefix string
+	if user_id != "" {
+		if len(user_id) > 4 {
+			prefix = user_id[len(user_id)-4:] //截取后4位
+		} else {
+			prefix = user_id
+		}
+	} else {
+		//随机4位
+		str := "123456789"
+		bytes := []byte(str)
+		result := []byte{}
+		r := rand.New(rand.NewSource(time.Now().UnixNano()))
+		for i := 0; i < 4; i++ {
+			result = append(result, bytes[r.Intn(len(bytes))])
+		}
+		prefix = string(result)
+	}
+
+	//拼接
+	var build strings.Builder
+	build.WriteString(prefix)
+	build.WriteString(strconv.FormatInt(time.Now().Unix(), 10)) //当前时间
+
+	return build.String()
+
+}
+
+/**
+ * 核销码规则
+ * 随机2位+当前时间（6位）
+ * 2020/08/10
+ */
+func VerifyNumber() string {
+	var prefix string
+
+	//随机4位
+	str := "123456789"
+	bytes := []byte(str)
+	result := []byte{}
+	r := rand.New(rand.NewSource(time.Now().UnixNano()))
+	for i := 0; i < 1; i++ {
+		result = append(result, bytes[r.Intn(len(bytes))])
+	}
+	prefix = string(result)
+
+	//拼接
+	var build strings.Builder
+	build.WriteString(prefix)
+	build.WriteString(strconv.FormatInt(time.Now().UnixNano(), 10)[10:17]) //当前时间
+
+	return build.String()
+
+}
diff --git a/order_sn_test.go b/order_sn_test.go
new file mode 100644
index 0000000..e575782
--- /dev/null
+++ b/order_sn_test.go
@@ -0,0 +1,30 @@
+package ordercalc
+
+import (
+	"testing"
+	"time"
+)
+
+func Test_NewNumber(t *testing.T) {
+
+	t.Log(time.Now().UnixNano())
+
+	var set map[string]int
+	set = make(map[string]int)
+
+	var i, reply int = 0, 0
+	var num string
+
+	for i < 100000 {
+		i++
+		num = VerifyNumber()
+		if _, ok := set[num]; ok {
+			reply++
+		} else {
+			set[num] = i
+		}
+	}
+
+	t.Log("reply:", reply)
+	// t.Log(set)
+}
diff --git a/order_status.go b/order_status.go
new file mode 100644
index 0000000..f96d198
--- /dev/null
+++ b/order_status.go
@@ -0,0 +1,176 @@
+package ordercalc
+
+/**
+'0': 待支付 下单，尚未支付 created
+'1':已支付 付款成功，此状态可退款 payed
+'5'：已验证 虚拟订单，验证核销码 using
+'6'：已完成 与供应商结算后，订单结束。配送订单配送完成 finished
+'7'：已取消 订单取消 canceled
+'8'：自动取消 到期未支付自动取消，此状态可由管理员手动延期取消 autocanceled
+'9'：申请退款 用户自助申请退订单，此状态可退款
+'13'：已退款 订单完成退款 refunded
+'15'：自动完成 使用时间过期，自动完成。 finished
+
+cancel,received,payed,created,finished,using
+
+## 发货
+is_delivery  是否发货 '1': 已发货
+delivery 发货时间
+
+## 收货
+is_received 是否收货 '1': 已收货
+received  收货时间
+*/
+
+var statusList map[string]string = map[string]string{
+	"0":  "created",
+	"1":  "payed",
+	"5":  "using",
+	"6":  "finished",
+	"7":  "canceled",
+	"8":  "autocanceled",
+	"9":  "askForRefund",
+	"13": "refunded",
+	"15": "autofinished",
+}
+var statusExtendList map[string]string = map[string]string{
+	"6": "received", //已收货归入已完成,
+}
+
+/*串货订单，供应商系统订单状态*/
+var channelOrderStatusList map[string]string = map[string]string{
+	"1":  "nosend",
+	"2":  "created",
+	"3":  "payed",
+	"4":  "askForRefund",
+	"5":  "refunded",
+	"6":  "canceled",
+	"7":  "finished",
+	"8":  "payFailed",  //支付失败
+	"9":  "breakoff",   //断开
+	"10": "fullRefund", //全额退款
+	"14": "autocanceled",
+	"15": "autofinished",
+	"16": "delivered",
+}
+
+func GetOrderStatusKey(status string) (key string) {
+	for k, val := range statusList {
+		if val == status {
+			key = k
+			break
+		}
+	}
+	if key == "" { //再找扩展的状态
+		for k, val := range statusExtendList {
+			if val == status {
+				key = k
+				break
+			}
+		}
+	}
+	return
+}
+
+func GetOrderStatusText(key string) (text string) {
+
+	for k, val := range statusList {
+		if k == key {
+			text = val
+			break
+		}
+	}
+	if text == "" { //再找扩展的状态
+		for k, val := range statusExtendList {
+			if k == key {
+				text = val
+				break
+			}
+		}
+	}
+	return
+}
+
+/**
+ * 返回订单状态描述
+ * 2021/01/28
+ */
+func GetOrderStatusDescByFlag(flag string) (text string) {
+	status := GetStatusText(flag)
+	return GetStatusDesc(status)
+}
+
+/**
+ * 返回订单状态描述
+ * 2020/10/22
+ */
+func GetOrderStatusDesc(key string) (text string) {
+	var statusDesc map[string]string = map[string]string{
+		"created":      "已创建",
+		"payed":        "已支付",
+		"askForRefund": "请求退款",
+		"using":        "使用中",
+		"finished":     "已完成",
+		"canceled":     "已取消",
+		"autocanceled": "自动取消",
+		"refunded":     "已退款",
+		"autofinished": "自动完成",
+		"received":     "已收货",
+	}
+	for k, val := range statusDesc {
+		if k == key {
+			text = val
+			break
+		}
+	}
+	return
+}
+
+func GetChannelOrderStatusKey(status string) (key string) {
+	for k, val := range channelOrderStatusList {
+		if val == status {
+			key = k
+			break
+		}
+	}
+	return
+}
+
+func GetChannelOrderStatusText(key string) (text string) {
+	for k, val := range channelOrderStatusList {
+		if k == key {
+			text = val
+			break
+		}
+	}
+	return
+}
+
+/**
+ * 返回订单状态描述
+ * 2020/10/22
+ */
+func GetChannelOrderStatusDesc(key string) (text string) {
+	var statusDesc map[string]string = map[string]string{
+		"nosend":       "未发送",
+		"created":      "已创建",
+		"payed":        "已支付",
+		"askForRefund": "请求退款",
+		"refunded":     "已退款",
+		"canceled":     "已取消",
+		"finished":     "已完成",
+		"payFailed":    "支付失败",
+		"breakoff":     "断开",
+		"fullRefund":   "全额退款",
+		"autocanceled": "自动取消",
+		"autofinished": "自动取消",
+		"delivered":    "已发货",
+	}
+	for k, val := range statusDesc {
+		if k == key {
+			text = val
+			break
+		}
+	}
+	return
+}