diff --git a/common.go b/common.go
new file mode 100644
index 0000000..75fc2dd
--- /dev/null
+++ b/common.go
@@ -0,0 +1,26 @@
+package wechat
+
+import (
+	"crypto/md5"
+	"encoding/hex"
+	"strings"
+)
+
+//密码加密
+func Md5Str(str ...string) string {
+
+	var build strings.Builder
+	if len(str) > 0 {
+		for _, v := range str {
+			build.WriteString(v)
+		}
+	} else {
+		return ""
+	}
+
+	h := md5.New()
+	h.Write([]byte(build.String())) // 需要加密的字符串
+	cipher2Str := h.Sum(nil)
+	sMd5 := hex.EncodeToString(cipher2Str) // 输出加密结果
+	return sMd5
+}
diff --git a/micropay.go b/micropay.go
new file mode 100644
index 0000000..eb577a4
--- /dev/null
+++ b/micropay.go
@@ -0,0 +1,337 @@
+package wechat
+
+import (
+	"encoding/xml"
+	"fmt"
+	"log"
+	"reflect"
+	"strings"
+	"time"
+
+	"git.tetele.net/tgo/network"
+
+	"git.tetele.net/tgo/crypter"
+
+	"git.tetele.net/tgo/helper"
+)
+
+//请求支付
+type PayXml struct {
+	XMLName        xml.Name `xml:"xml"`
+	Appid          string   `xml:"appid"`
+	MchId          string   `xml:"mch_id"`
+	DeviceInfo     string   `xml:"device_info"`
+	NonceStr       string   `xml:"nonce_str"`
+	Sign           string   `xml:"sign"`
+	Body           string   `xml:"body"`
+	OutTradeNo     string   `xml:"out_trade_no"`
+	TotalFee       int      `xml:"total_fee"`
+	SpbillCreateIp string   `xml:"spbill_create_ip"`
+	AuthCode       string   `xml:"auth_code"`
+}
+
+//支付结果
+type PayReturnXml struct {
+	ReturnCode         string `xml:"return_code"`
+	ReturnMsg          string `xml:"return_msg"`
+	Appid              string `xml:"appid"`
+	MchId              string `xml:"mch_id"`
+	DeviceInfo         string `xml:"device_info"`
+	NonceStr           string `xml:"nonce_str"`
+	Sign               string `xml:"sign"`
+	ResultCode         string `xml:"result_code"`
+	ErrCode            string `xml:"err_code"`
+	ErrCodeDes         string `xml:"err_code_des"`
+	Openid             string `xml:"openid"`
+	IsSubscribe        string `xml:"is_subscribe"`
+	TradeType          string `xml:"trade_type"`
+	BankType           string `xml:"bank_type"`
+	FeeType            string `xml:"fee_type"`
+	TotalFee           string `xml:"total_fee"`
+	SettlementTotalFee string `xml:"settlement_total_fee"`
+	CouponFee          string `xml:"coupon_fee"`
+	CashFeeType        string `xml:"cash_fee_type"`
+	CashFee            string `xml:"cash_fee"`
+	TransactionId      string `xml:"transaction_id"`
+	OutTradeNo         string `xml:"out_trade_no"`
+	Attach             string `xml:"attach"`
+	TimeEnd            string `xml:"time_end"`
+	PromotionDetail    string `xml:"promotion_detail"`
+}
+
+//查询支付
+type QueryXml struct {
+	XMLName    xml.Name `xml:"xml"`
+	Appid      string   `xml:"appid"`
+	MchId      string   `xml:"mch_id"`
+	OutTradeNo string   `xml:"out_trade_no"`
+	NonceStr   string   `xml:"nonce_str"`
+	Sign       string   `xml:"sign"`
+}
+
+//查询结果
+type QueryReturnXml struct {
+	ReturnCode         string `xml:"return_code"`
+	ReturnMsg          string `xml:"return_msg"`
+	Appid              string `xml:"appid"`
+	MchId              string `xml:"mch_id"`
+	NonceStr           string `xml:"nonce_str"`
+	Sign               string `xml:"sign"`
+	ResultCode         string `xml:"result_code"`
+	ErrCode            string `xml:"err_code"`
+	ErrCodeDes         string `xml:"err_code_des"`
+	DeviceInfo         string `xml:"device_info"`
+	Openid             string `xml:"openid"`
+	IsSubscribe        string `xml:"is_subscribe"`
+	TradeType          string `xml:"trade_type"`
+	TradeState         string `xml:"trade_state"`
+	BankType           string `xml:"bank_type"`
+	TotalFee           string `xml:"total_fee"`
+	SettlementTotalFee string `xml:"settlement_total_fee"`
+	FeeType            string `xml:"fee_type"`
+	CashFee            string `xml:"cash_fee"`
+	CashFeeType        string `xml:"cash_fee_type"`
+	CouponFee          string `xml:"coupon_fee"`
+	CouponCount        string `xml:"coupon_count"`
+	TransactionId      string `xml:"transaction_id"`
+	OutTradeNo         string `xml:"out_trade_no"`
+	Attach             string `xml:"attach"`
+	TimeEnd            string `xml:"time_end"`
+	TradeStateDesc     string `xml:"trade_state_desc"`
+}
+
+// 撤消
+type ReverseXml struct {
+	XMLName    xml.Name `xml:"xml"`
+	Appid      string   `xml:"appid"`
+	MchId      string   `xml:"mch_id"`
+	OutTradeNo string   `xml:"out_trade_no"`
+	NonceStr   string   `xml:"nonce_str"`
+	Sign       string   `xml:"sign"`
+}
+
+//撤消结果
+type ReverseReturnXml struct {
+	ReturnCode string `xml:"return_code"`
+	ReturnMsg  string `xml:"return_msg"`
+	Appid      string `xml:"appid"`
+	MchId      string `xml:"mch_id"`
+	NonceStr   string `xml:"nonce_str"`
+	Sign       string `xml:"sign"`
+	ResultCode string `xml:"result_code"`
+	ErrCode    string `xml:"err_code"`
+	ErrCodeDes string `xml:"err_code_des"`
+	Recall     string `xml:"recall"`
+}
+
+/**
+ * 微信二维码支付
+ * 2022/02/07
+ * @param device_info 设备号
+ * @param body 商品描述
+ * @param out_trade_no 商户订单号
+ * @param total_fee 订单金额
+ * @param auth_code 付款码
+ */
+
+func MicroPay(appid, mchid, mch_key, device_info, body, out_trade_no, auth_code, total_fee string) (bool, string, PayReturnXml) {
+
+	log.Println("wechat micropay")
+
+	var requestxml PayXml
+
+	var retXml PayReturnXml
+
+	requestxml.Appid = appid
+	requestxml.MchId = mchid
+	requestxml.DeviceInfo = device_info
+	requestxml.NonceStr = helper.GetRandomString(30)
+	requestxml.Body = body
+	requestxml.OutTradeNo = out_trade_no
+	requestxml.TotalFee = helper.ToInt(helper.FloatMul(total_fee, 100))
+	requestxml.SpbillCreateIp = network.GetLocalIp()
+	requestxml.AuthCode = auth_code
+
+	signStr := helper.StringJoin("appid=", requestxml.Appid, "&auth_code=", requestxml.AuthCode,
+		"&body=", requestxml.Body, "&device_info=", requestxml.DeviceInfo,
+		"&mch_id=", requestxml.MchId, "&nonce_str=", requestxml.NonceStr,
+		"&out_trade_no=", requestxml.OutTradeNo, "&spbill_create_ip=", requestxml.SpbillCreateIp,
+		"&total_fee=", helper.ToString(requestxml.TotalFee), "&key=", mch_key)
+
+	signMd5 := Md5Str(signStr)
+
+	requestxml.Sign = strings.ToUpper(signMd5)
+
+	reqXmlJson, err := xml.Marshal(requestxml)
+
+	log.Println(requestxml, string(reqXmlJson), err)
+
+	url := "https://api.mch.weixin.qq.com/pay/micropay"
+	ret, err := network.SendXml("POST", url, requestxml)
+
+	log.Println("wechat micropay pay result:", string(ret), err)
+
+	if err != nil {
+		log.Println("Err:", err)
+		return false, "微信支付失败，请检查网络", retXml
+	}
+
+	err = xml.Unmarshal(ret, &retXml)
+	if err != nil {
+		log.Println("xml Unmarshal Err:", retXml, err)
+		return false, "未知的支付结果", retXml
+	}
+
+	if retXml.ResultCode == "SUCCESS" {
+
+		retMap := XmlStructToMap(retXml)
+
+		//验证sign
+		signStr = helper.HttpBuildQuery(retMap) + "&key=" + mch_key
+
+		sign := strings.ToUpper(Md5Str(signStr))
+
+		if sign != retXml.Sign {
+			log.Println("Err:签名错误", string(ret), sign)
+			return false, "支付结果签名错误", retXml
+		}
+	} else {
+		return false, retXml.ReturnMsg, retXml
+	}
+
+	return true, "", retXml
+}
+
+func MicroPayQuery(appid, mchid, out_trade_no, mch_key string) (bool, string, QueryReturnXml) {
+
+	log.Println("wechat micropay query", out_trade_no)
+
+	var requestxml QueryXml
+
+	var retXml QueryReturnXml
+
+	requestxml.Appid = appid
+	requestxml.MchId = mchid
+	requestxml.NonceStr = helper.GetRandomString(30)
+	requestxml.OutTradeNo = out_trade_no
+
+	signStr := helper.StringJoin("appid=", requestxml.Appid,
+		"&mch_id=", requestxml.MchId, "&nonce_str=", requestxml.NonceStr,
+		"&out_trade_no=", requestxml.OutTradeNo, "&key=", mch_key)
+
+	signMd5 := Md5Str(signStr)
+
+	requestxml.Sign = strings.ToUpper(signMd5)
+
+	url := "https://api.mch.weixin.qq.com/pay/orderquery"
+	ret, err := network.SendXml("POST", url, requestxml)
+
+	if err != nil {
+		log.Println("Err:", err)
+		return false, "微信支付失败，请检查网络", retXml
+	}
+
+	err = xml.Unmarshal(ret, &retXml)
+	if err != nil {
+		log.Println("xml Unmarshal Err:", retXml, err)
+		return false, "未知的支付结果", retXml
+	}
+
+	if retXml.ReturnCode == "SUCCESS" {
+
+		retMap := XmlStructToMap(retXml)
+
+		//验证sign
+		signStr = helper.HttpBuildQuery(retMap) + "&key=" + mch_key
+
+		sign := strings.ToUpper(Md5Str(signStr))
+
+		if sign != retXml.Sign {
+			log.Println("Err:签名错误", string(ret), sign)
+			return false, "查询支付结果签名错误", retXml
+		}
+	} else {
+		return false, retXml.ReturnMsg, retXml
+	}
+	return true, "", retXml
+}
+
+/**
+ * 撤消订单
+ * 2023/06/13
+ */
+func MicroPayReverse(appid, mchid, out_trade_no, mch_key string) (bool, string, QueryReturnXml) {
+
+	log.Println("wechat micropay reverse", out_trade_no)
+
+	var requestxml ReverseXml
+
+	var retXml ReverseReturnXml
+
+	requestxml.Appid = appid
+	requestxml.MchId = mchid
+	requestxml.NonceStr = helper.GetRandomString(30)
+	requestxml.OutTradeNo = out_trade_no
+
+	signStr := helper.StringJoin("appid=", requestxml.Appid,
+		"&mch_id=", requestxml.MchId, "&nonce_str=", requestxml.NonceStr,
+		"&out_trade_no=", requestxml.OutTradeNo, "&key=", mch_key)
+
+	signMd5 := Md5Str(signStr)
+
+	requestxml.Sign = strings.ToUpper(signMd5)
+
+	url := "https://api.mch.weixin.qq.com/secapi/pay/reverse"
+	ret, err := network.SendXml("POST", url, requestxml)
+
+	if err != nil {
+		log.Println("Err:", err)
+		return false, "撤消微信支付失败，请检查网络", retXml
+	}
+
+	err = xml.Unmarshal(ret, &retXml)
+	if err != nil {
+		log.Println("xml Unmarshal Err:", retXml, err)
+		return false, "未知的撤消结果", retXml
+	}
+
+	if retXml.ReturnCode == "SUCCESS" {
+
+		retMap := XmlStructToMap(retXml)
+
+		//验证sign
+		signStr = helper.HttpBuildQuery(retMap) + "&key=" + mch_key
+
+		sign := strings.ToUpper(Md5Str(signStr))
+
+		if sign != retXml.Sign {
+			log.Println("Err:签名错误", string(ret), sign)
+			return false, "查询支付结果签名错误", retXml
+		}
+	} else {
+		return false, retXml.ReturnMsg, retXml
+	}
+	return true, "", retXml
+}
+
+func XmlStructToMap(retXml interface{}) map[string]string {
+
+	t := reflect.TypeOf(retXml)
+	v := reflect.ValueOf(retXml)
+
+	//转为map，验签
+	retMap := make(map[string]string)
+	var retValue string
+	var tag string
+	for k := 0; k < t.NumField(); k++ {
+		if t.Field(k).Name != "Sign" {
+			retValue = helper.ToString(v.Field(k).Interface())
+			tag = fmt.Sprintf("%s", t.Field(k).Tag)
+			tag = strings.ReplaceAll(tag, "xml:", "")
+			tag = strings.ReplaceAll(tag, "\"", "")
+			retMap[tag] = retValue
+		}
+	}
+
+	return retMap
+}