diff --git a/admin/admin-service-impl/src/main/java/cn/iocoder/mall/admin/service/AdminServiceImpl.java b/admin/admin-service-impl/src/main/java/cn/iocoder/mall/admin/service/AdminServiceImpl.java
index 88a4f2eac..298646b52 100644
--- a/admin/admin-service-impl/src/main/java/cn/iocoder/mall/admin/service/AdminServiceImpl.java
+++ b/admin/admin-service-impl/src/main/java/cn/iocoder/mall/admin/service/AdminServiceImpl.java
@@ -183,7 +183,7 @@ public class AdminServiceImpl implements AdminService {
         }
         // TODO 芋艿，这里先简单实现。即方式是，删除老的分配的角色关系，然后添加新的分配的角色关系
         // 标记管理员角色源关系都为删除
-        adminRoleMapper.updateToDeletedByRoleId(updateAdminId);
+        adminRoleMapper.updateToDeletedByAdminId(updateAdminId);
         // 创建 RoleResourceDO 数组，并插入到数据库
         if (!roleIds.isEmpty()) {
             List<AdminRoleDO> adminRoleDOs = roleIds.stream().map(roleId -> {
diff --git a/admin/admin-service-impl/src/main/resources/mapper/AdminRoleMapper.xml b/admin/admin-service-impl/src/main/resources/mapper/AdminRoleMapper.xml
index f677b8a50..8faa8f3af 100644
--- a/admin/admin-service-impl/src/main/resources/mapper/AdminRoleMapper.xml
+++ b/admin/admin-service-impl/src/main/resources/mapper/AdminRoleMapper.xml
@@ -16,6 +16,7 @@
       FROM admin a, admin_role ar
       WHERE a.id = #{adminId}
       AND a.id = ar.admin_id
+      AND ar.deleted = 0
     </select>
 
     <update id="updateToDeletedByAdminId" parameterType="Integer">
diff --git a/admin/admin-service-impl/src/main/resources/mapper/RoleMapper.xml b/admin/admin-service-impl/src/main/resources/mapper/RoleMapper.xml
index 329c960bc..8b1b84b7f 100644
--- a/admin/admin-service-impl/src/main/resources/mapper/RoleMapper.xml
+++ b/admin/admin-service-impl/src/main/resources/mapper/RoleMapper.xml
@@ -63,7 +63,7 @@
     <select id="selectListByIds" resultType="RoleDO">
         SELECT
             <include refid="FIELDS"/>
-        FROM resource
+        FROM role
         WHERE id IN
         <foreach item="id" collection="ids" separator="," open="(" close=")" index="">
             #{id}
diff --git a/build_admin.sh b/build_admin.sh
deleted file mode 100644
index 0a5a3ea81..000000000
--- a/build_admin.sh
+++ /dev/null
@@ -1 +0,0 @@
-mvn clean package -am -DskipTests
\ No newline at end of file
diff --git a/build_order.sh b/build_order.sh
deleted file mode 100644
index dcefb1672..000000000
--- a/build_order.sh
+++ /dev/null
@@ -1 +0,0 @@
-mvn clean package -pl order/order-application -am -DskipTests
\ No newline at end of file
diff --git a/build_product.sh b/build_product.sh
deleted file mode 100644
index d8762854f..000000000
--- a/build_product.sh
+++ /dev/null
@@ -1 +0,0 @@
-mvn clean package -pl product/product-application -am -DskipTests
\ No newline at end of file
diff --git a/common/common-framework/src/main/java/cn/iocoder/common/framework/constant/CommonStatusEnum.java b/common/common-framework/src/main/java/cn/iocoder/common/framework/constant/CommonStatusEnum.java
new file mode 100644
index 000000000..6cea83c63
--- /dev/null
+++ b/common/common-framework/src/main/java/cn/iocoder/common/framework/constant/CommonStatusEnum.java
@@ -0,0 +1,43 @@
+package cn.iocoder.common.framework.constant;
+
+/**
+ * 通用状态枚举
+ */
+public enum CommonStatusEnum {
+
+    ENABLE(1, "开启"),
+    DISABLE(2, "关闭");
+
+    /**
+     * 状态值
+     */
+    private Integer value;
+    /**
+     * 状态名
+     */
+    private String name;
+
+    CommonStatusEnum(Integer value, String name) {
+        this.value = value;
+        this.name = name;
+    }
+
+    public Integer getValue() {
+        return value;
+    }
+
+    public CommonStatusEnum setValue(Integer value) {
+        this.value = value;
+        return this;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public CommonStatusEnum setName(String name) {
+        this.name = name;
+        return this;
+    }
+
+}
\ No newline at end of file
diff --git a/common/common-framework/src/main/java/cn/iocoder/common/framework/util/HttpUtil.java b/common/common-framework/src/main/java/cn/iocoder/common/framework/util/HttpUtil.java
index 4cd649b6e..418db24aa 100644
--- a/common/common-framework/src/main/java/cn/iocoder/common/framework/util/HttpUtil.java
+++ b/common/common-framework/src/main/java/cn/iocoder/common/framework/util/HttpUtil.java
@@ -18,4 +18,25 @@ public class HttpUtil {
         return authorization.substring(index + 7).trim();
     }
 
+    public static String getIp(HttpServletRequest request) {
+        // 基于 X-Forwarded-For 获得
+        String ip = request.getHeader("X-Forwarded-For");
+        if (!StringUtils.isEmpty(ip) && !"unKnown".equalsIgnoreCase(ip)) {
+            // 多次反向代理后会有多个ip值，第一个 ip 才是真实 ip
+            int index = ip.indexOf(",");
+            if (index != -1) {
+                return ip.substring(0, index);
+            } else {
+                return ip;
+            }
+        }
+        // 基于 X-Real-IP 获得
+        ip = request.getHeader("X-Real-IP");
+        if (!StringUtils.isEmpty(ip) && !"unKnown".equalsIgnoreCase(ip)) {
+            return ip;
+        }
+        // 默认方式
+        return request.getRemoteAddr();
+    }
+
 }
\ No newline at end of file
diff --git a/common/common-framework/target/classes/cn/iocoder/common/framework/util/HttpUtil.class b/common/common-framework/target/classes/cn/iocoder/common/framework/util/HttpUtil.class
index b9d62df2b..e9841d099 100644
Binary files a/common/common-framework/target/classes/cn/iocoder/common/framework/util/HttpUtil.class and b/common/common-framework/target/classes/cn/iocoder/common/framework/util/HttpUtil.class differ
diff --git a/pay/pay-application/src/main/java/cn/iocoder/mall/pay/application/controller/PayController.java b/pay/pay-application/src/main/java/cn/iocoder/mall/pay/application/controller/PayController.java
deleted file mode 100644
index d8e45ca55..000000000
--- a/pay/pay-application/src/main/java/cn/iocoder/mall/pay/application/controller/PayController.java
+++ /dev/null
@@ -1,15 +0,0 @@
-package cn.iocoder.mall.pay.application.controller;
-
-import cn.iocoder.mall.pay.api.PayService;
-import com.alibaba.dubbo.config.annotation.Reference;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RestController;
-
-@RestController
-@RequestMapping("/pay")
-public class PayController {
-
-    @Reference(validation = "true")
-    private PayService payService;
-
-}
diff --git a/pay/pay-application/src/main/java/cn/iocoder/mall/pay/application/controller/users/PayDemoController.java b/pay/pay-application/src/main/java/cn/iocoder/mall/pay/application/controller/users/PayDemoController.java
new file mode 100644
index 000000000..5af8b5736
--- /dev/null
+++ b/pay/pay-application/src/main/java/cn/iocoder/mall/pay/application/controller/users/PayDemoController.java
@@ -0,0 +1,46 @@
+package cn.iocoder.mall.pay.application.controller.users;
+
+import cn.iocoder.common.framework.util.HttpUtil;
+import cn.iocoder.common.framework.vo.CommonResult;
+import cn.iocoder.mall.pay.api.PayTransactionService;
+import cn.iocoder.mall.pay.api.bo.PayTransactionBO;
+import cn.iocoder.mall.pay.api.dto.PayTransactionCreateDTO;
+import com.alibaba.dubbo.config.annotation.Reference;
+import org.springframework.util.Assert;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import javax.servlet.http.HttpServletRequest;
+import java.util.Date;
+
+/**
+ * 示例 Controller
+ */
+@RestController
+@RequestMapping("users/demo")
+public class PayDemoController {
+
+    @Reference(validation = "true")
+    private PayTransactionService payTransactionService;
+
+    @PostMapping("/create_order")
+    public void createOrder(HttpServletRequest request) {
+        // 创建业务订单
+        // ...
+
+        // 调用【支付服务】，创建交易订单
+        PayTransactionCreateDTO payTransactionCreateDTO = new PayTransactionCreateDTO()
+                .setAppId("1024")
+                .setCreateIp(HttpUtil.getIp(request))
+                .setOrderId("1")
+                .setOrderSubject("商品名" )
+                .setOrderDescription("商品描述")
+                .setOrderMemo("商品备注")
+                .setPrice(10)
+                .setExpireTime(new Date());
+        CommonResult<PayTransactionBO> result = payTransactionService.createTransaction(payTransactionCreateDTO);
+        Assert.isTrue(result.isSuccess(), "一定会成功的");
+    }
+
+}
\ No newline at end of file
diff --git a/pay/pay-application/src/main/java/cn/iocoder/mall/pay/application/controller/users/PayTransactionController.java b/pay/pay-application/src/main/java/cn/iocoder/mall/pay/application/controller/users/PayTransactionController.java
new file mode 100644
index 000000000..e1285f418
--- /dev/null
+++ b/pay/pay-application/src/main/java/cn/iocoder/mall/pay/application/controller/users/PayTransactionController.java
@@ -0,0 +1,22 @@
+package cn.iocoder.mall.pay.application.controller.users;
+
+import cn.iocoder.common.framework.vo.CommonResult;
+import cn.iocoder.mall.pay.api.PayTransactionService;
+import com.alibaba.dubbo.config.annotation.Reference;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("users/transaction") // TODO 芋艿，理论来说，是用户无关的。这里先酱紫先~
+public class PayTransactionController {
+
+    @Reference(validation = "true")
+    private PayTransactionService payService;
+
+    @PostMapping("/submit") // TODO api 注释
+    public CommonResult submit() { // TODO 1. params 2. result
+        return null;
+    }
+
+}
\ No newline at end of file
diff --git a/pay/pay-service-api/pom.xml b/pay/pay-service-api/pom.xml
index 6e8532fa4..42799e634 100644
--- a/pay/pay-service-api/pom.xml
+++ b/pay/pay-service-api/pom.xml
@@ -10,6 +10,14 @@
     <modelVersion>4.0.0</modelVersion>
 
     <artifactId>pay-service-api</artifactId>
+    <dependencies>
+        <dependency>
+            <groupId>cn.iocoder.mall</groupId>
+            <artifactId>common-framework</artifactId>
+            <version>1.0-SNAPSHOT</version>
+            <scope>compile</scope>
+        </dependency>
+    </dependencies>
 
 
 </project>
\ No newline at end of file
diff --git a/pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/PayService.java b/pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/PayService.java
deleted file mode 100644
index 4556d0495..000000000
--- a/pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/PayService.java
+++ /dev/null
@@ -1,4 +0,0 @@
-package cn.iocoder.mall.pay.api;
-
-public interface PayService {
-}
diff --git a/pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/PayTransactionService.java b/pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/PayTransactionService.java
new file mode 100644
index 000000000..046b26a28
--- /dev/null
+++ b/pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/PayTransactionService.java
@@ -0,0 +1,15 @@
+package cn.iocoder.mall.pay.api;
+
+import cn.iocoder.common.framework.vo.CommonResult;
+import cn.iocoder.mall.pay.api.bo.PayTransactionBO;
+import cn.iocoder.mall.pay.api.dto.PayTransactionCreateDTO;
+
+public interface PayTransactionService {
+
+    CommonResult<PayTransactionBO> createTransaction(PayTransactionCreateDTO payTransactionCreateDTO);
+
+    CommonResult submitTransaction(); // TODO 1. params 2. result
+
+    CommonResult cancelTransaction(); // TODO 1. params 2. result
+
+}
\ No newline at end of file
diff --git a/pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/bo/PayTransactionBO.java b/pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/bo/PayTransactionBO.java
new file mode 100644
index 000000000..1ef08264a
--- /dev/null
+++ b/pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/bo/PayTransactionBO.java
@@ -0,0 +1,242 @@
+package cn.iocoder.mall.pay.api.bo;
+
+import java.util.Date;
+
+/**
+ * 支付交易 BO
+ */
+public class PayTransactionBO {
+
+    /**
+     * 编号，自增
+     */
+    private Integer id;
+    /**
+     * 应用编号
+     */
+    private String appId;
+    /**
+     * 发起交易的 IP
+     */
+    private String createIp;
+    /**
+     * 业务线的订单编号
+     *
+     * 1. 使用 String 的原因是，业务线可能使用 String 做为编号
+     * 2. 每个 appId 下，orderId 唯一
+     */
+    private String orderId;
+    /**
+     * 订单商品名
+     */
+    private String orderSubject;
+    /**
+     * 订单商品描述
+     */
+    private String orderDescription;
+    /**
+     * 订单备注
+     */
+    private String orderMemo;
+    /**
+     * 支付金额，单位：分。
+     */
+    private Integer price;
+    /**
+     * 订单状态
+     *
+     * @see cn.iocoder.mall.pay.api.constant.PayTransactionStatusEnum
+     */
+    private Integer status;
+    /**
+     * 交易过期时间
+     */
+    private Date expireTime;
+    /**
+     * 回调业务线完成时间
+     */
+    private Date finishTime;
+
+    /**
+     * 成功支付的交易拓展编号
+     */
+    private Integer extensionId;
+    /**
+     * 支付成功的支付渠道
+     *
+     * @see cn.iocoder.mall.pay.api.constant.PayChannelEnum
+     */
+    private Integer payChannel;
+    /**
+     * 第三方支付成功的时间
+     */
+    private Date paymentTime;
+    /**
+     * 收到第三方系统通知的时间
+     *
+     * 一般情况下，即第三方系统的异步通知
+     */
+    private Date notifyTime;
+    /**
+     * 第三方的流水号
+     */
+    private String tradeNo;
+    /**
+     * 创建时间
+     */
+    private Date createTime;
+
+    public Integer getId() {
+        return id;
+    }
+
+    public PayTransactionBO setId(Integer id) {
+        this.id = id;
+        return this;
+    }
+
+    public String getAppId() {
+        return appId;
+    }
+
+    public PayTransactionBO setAppId(String appId) {
+        this.appId = appId;
+        return this;
+    }
+
+    public String getCreateIp() {
+        return createIp;
+    }
+
+    public PayTransactionBO setCreateIp(String createIp) {
+        this.createIp = createIp;
+        return this;
+    }
+
+    public String getOrderId() {
+        return orderId;
+    }
+
+    public PayTransactionBO setOrderId(String orderId) {
+        this.orderId = orderId;
+        return this;
+    }
+
+    public String getOrderSubject() {
+        return orderSubject;
+    }
+
+    public PayTransactionBO setOrderSubject(String orderSubject) {
+        this.orderSubject = orderSubject;
+        return this;
+    }
+
+    public String getOrderDescription() {
+        return orderDescription;
+    }
+
+    public PayTransactionBO setOrderDescription(String orderDescription) {
+        this.orderDescription = orderDescription;
+        return this;
+    }
+
+    public String getOrderMemo() {
+        return orderMemo;
+    }
+
+    public PayTransactionBO setOrderMemo(String orderMemo) {
+        this.orderMemo = orderMemo;
+        return this;
+    }
+
+    public Integer getPrice() {
+        return price;
+    }
+
+    public PayTransactionBO setPrice(Integer price) {
+        this.price = price;
+        return this;
+    }
+
+    public Integer getStatus() {
+        return status;
+    }
+
+    public PayTransactionBO setStatus(Integer status) {
+        this.status = status;
+        return this;
+    }
+
+    public Date getExpireTime() {
+        return expireTime;
+    }
+
+    public PayTransactionBO setExpireTime(Date expireTime) {
+        this.expireTime = expireTime;
+        return this;
+    }
+
+    public Date getFinishTime() {
+        return finishTime;
+    }
+
+    public PayTransactionBO setFinishTime(Date finishTime) {
+        this.finishTime = finishTime;
+        return this;
+    }
+
+    public Integer getExtensionId() {
+        return extensionId;
+    }
+
+    public PayTransactionBO setExtensionId(Integer extensionId) {
+        this.extensionId = extensionId;
+        return this;
+    }
+
+    public Integer getPayChannel() {
+        return payChannel;
+    }
+
+    public PayTransactionBO setPayChannel(Integer payChannel) {
+        this.payChannel = payChannel;
+        return this;
+    }
+
+    public Date getPaymentTime() {
+        return paymentTime;
+    }
+
+    public PayTransactionBO setPaymentTime(Date paymentTime) {
+        this.paymentTime = paymentTime;
+        return this;
+    }
+
+    public Date getNotifyTime() {
+        return notifyTime;
+    }
+
+    public PayTransactionBO setNotifyTime(Date notifyTime) {
+        this.notifyTime = notifyTime;
+        return this;
+    }
+
+    public String getTradeNo() {
+        return tradeNo;
+    }
+
+    public PayTransactionBO setTradeNo(String tradeNo) {
+        this.tradeNo = tradeNo;
+        return this;
+    }
+
+    public Date getCreateTime() {
+        return createTime;
+    }
+
+    public PayTransactionBO setCreateTime(Date createTime) {
+        this.createTime = createTime;
+        return this;
+    }
+
+}
\ No newline at end of file
diff --git a/pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/constant/PayChannel.java b/pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/constant/PayChannelEnum.java
similarity index 87%
rename from pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/constant/PayChannel.java
rename to pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/constant/PayChannelEnum.java
index 0939b203c..0325e6bb7 100644
--- a/pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/constant/PayChannel.java
+++ b/pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/constant/PayChannelEnum.java
@@ -3,7 +3,7 @@ package cn.iocoder.mall.pay.api.constant;
 /**
  * 支付通道
  */
-public enum PayChannel {
+public enum PayChannelEnum {
 
     WEIXIN_APP(100, "wx", "微信 App 支付"),
     WEIXIN_PUB(100, "wx", "微信 JS API 支付"),
@@ -23,7 +23,7 @@ public enum PayChannel {
      */
     private String name;
 
-    PayChannel(Integer id, String code, String name) {
+    PayChannelEnum(Integer id, String code, String name) {
         this.id = id;
         this.code = code;
         this.name = name;
@@ -40,4 +40,5 @@ public enum PayChannel {
     public String getName() {
         return name;
     }
+
 }
\ No newline at end of file
diff --git a/pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/constant/PayErrorCodeEnum.java b/pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/constant/PayErrorCodeEnum.java
index b51cd16f3..827a35eb3 100644
--- a/pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/constant/PayErrorCodeEnum.java
+++ b/pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/constant/PayErrorCodeEnum.java
@@ -7,7 +7,13 @@ package cn.iocoder.mall.pay.api.constant;
  */
 public enum PayErrorCodeEnum {
 
-    // ========== PAY 模块 ==========
+    // ========== APP 模块 ==========
+    PAY_APP_NOT_FOUND(1004000000, "App 不存在"),
+    PAY_APP_IS_DISABLE(1004000001, "App 已经被禁用"),
+
+    // ========== TRANSACTION 模块 ==========
+
+
     ;
 
     private final int code;
diff --git a/pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/constant/PayTransactionNotifyStatusEnum.java b/pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/constant/PayTransactionNotifyStatusEnum.java
new file mode 100644
index 000000000..0d85e7efa
--- /dev/null
+++ b/pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/constant/PayTransactionNotifyStatusEnum.java
@@ -0,0 +1,38 @@
+package cn.iocoder.mall.pay.api.constant;
+
+/**
+ * 支付交易通知状态枚举
+ */
+public enum PayTransactionNotifyStatusEnum {
+
+    WAITING(1, "等待通知"),
+    SUCCESS(2, "通知成功"),
+    FAILURE(3, "通知失败"), // 多次尝试，彻底失败
+    REQUEST_SUCCESS(4, "请求成功，但是结果失败"),
+    REQUEST_FAILURE(5, "请求失败"),
+
+    ;
+
+    /**
+     * 状态
+     */
+    private Integer value;
+    /**
+     * 名字
+     */
+    private String name;
+
+    PayTransactionNotifyStatusEnum(Integer value, String name) {
+        this.value = value;
+        this.name = name;
+    }
+
+    public Integer getValue() {
+        return value;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+}
\ No newline at end of file
diff --git a/pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/constant/PayTransactionStatusEnum.java b/pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/constant/PayTransactionStatusEnum.java
new file mode 100644
index 000000000..9047b1fde
--- /dev/null
+++ b/pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/constant/PayTransactionStatusEnum.java
@@ -0,0 +1,45 @@
+package cn.iocoder.mall.pay.api.constant;
+
+/**
+ * 支付交易状态枚举
+ */
+public enum PayTransactionStatusEnum {
+
+    WAITTING(1, "等待支付"),
+    SUCCESS(2, "支付成功"),
+    CANCEL(3, "取消支付"), // 例如说，支付单超时
+    ;
+
+    /**
+     * 状态
+     */
+    private Integer value;
+    /**
+     * 名字
+     */
+    private String name;
+
+    PayTransactionStatusEnum(Integer value, String name) {
+        this.value = value;
+        this.name = name;
+    }
+
+    public Integer getValue() {
+        return value;
+    }
+
+    public PayTransactionStatusEnum setValue(Integer value) {
+        this.value = value;
+        return this;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public PayTransactionStatusEnum setName(String name) {
+        this.name = name;
+        return this;
+    }
+
+}
\ No newline at end of file
diff --git a/pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/dto/PayTransactionCreateDTO.java b/pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/dto/PayTransactionCreateDTO.java
new file mode 100644
index 000000000..b95d87139
--- /dev/null
+++ b/pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/dto/PayTransactionCreateDTO.java
@@ -0,0 +1,130 @@
+package cn.iocoder.mall.pay.api.dto;
+
+import javax.validation.constraints.DecimalMin;
+import javax.validation.constraints.NotEmpty;
+import javax.validation.constraints.NotNull;
+import javax.validation.constraints.Size;
+import java.util.Date;
+
+/**
+ * 支付交易创建 DTO
+ */
+public class PayTransactionCreateDTO {
+
+    /**
+     * 应用编号
+     */
+    @NotEmpty(message = "应用编号不能为空")
+    private String appId;
+    /**
+     * 发起交易的 IP
+     */
+    @NotEmpty(message = "IP 不能为空")
+    private String createIp;
+    /**
+     * 业务线的订单编号
+     */
+    @NotEmpty(message = "订单号不能为空")
+    private String orderId;
+    /**
+     * 订单商品名
+     */
+    @NotEmpty(message = "商品名不能为空")
+    @Size(max = 32, message = "商品名不能超过32")
+    private String orderSubject;
+    /**
+     * 订单商品描述
+     */
+    @NotEmpty(message = "商品描述不能为空")
+    @Size(max = 128, message = "商品描述长度不能超过128")
+    private String orderDescription;
+    /**
+     * 订单备注
+     */
+    @Size(max = 256, message = "商品描述长度不能超过256")
+    private String orderMemo;
+    /**
+     * 支付金额，单位：分。
+     */
+    @NotNull(message = "金额不能为空")
+    @DecimalMin(value = "0", inclusive = false, message = "金额必须大于零")
+    private Integer price;
+    /**
+     * 交易过期时间
+     */
+    @NotNull(message = "交易过期时间不能为空")
+    private Date expireTime;
+
+    public String getAppId() {
+        return appId;
+    }
+
+    public PayTransactionCreateDTO setAppId(String appId) {
+        this.appId = appId;
+        return this;
+    }
+
+    public String getCreateIp() {
+        return createIp;
+    }
+
+    public PayTransactionCreateDTO setCreateIp(String createIp) {
+        this.createIp = createIp;
+        return this;
+    }
+
+    public String getOrderId() {
+        return orderId;
+    }
+
+    public PayTransactionCreateDTO setOrderId(String orderId) {
+        this.orderId = orderId;
+        return this;
+    }
+
+    public String getOrderSubject() {
+        return orderSubject;
+    }
+
+    public PayTransactionCreateDTO setOrderSubject(String orderSubject) {
+        this.orderSubject = orderSubject;
+        return this;
+    }
+
+    public String getOrderDescription() {
+        return orderDescription;
+    }
+
+    public PayTransactionCreateDTO setOrderDescription(String orderDescription) {
+        this.orderDescription = orderDescription;
+        return this;
+    }
+
+    public String getOrderMemo() {
+        return orderMemo;
+    }
+
+    public PayTransactionCreateDTO setOrderMemo(String orderMemo) {
+        this.orderMemo = orderMemo;
+        return this;
+    }
+
+    public Integer getPrice() {
+        return price;
+    }
+
+    public PayTransactionCreateDTO setPrice(Integer price) {
+        this.price = price;
+        return this;
+    }
+
+    public Date getExpireTime() {
+        return expireTime;
+    }
+
+    public PayTransactionCreateDTO setExpireTime(Date expireTime) {
+        this.expireTime = expireTime;
+        return this;
+    }
+
+}
\ No newline at end of file
diff --git a/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/convert/PayTransactionConvert.java b/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/convert/PayTransactionConvert.java
new file mode 100644
index 000000000..27b6b0fe6
--- /dev/null
+++ b/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/convert/PayTransactionConvert.java
@@ -0,0 +1,21 @@
+package cn.iocoder.mall.pay.convert;
+
+import cn.iocoder.mall.pay.api.bo.PayTransactionBO;
+import cn.iocoder.mall.pay.api.dto.PayTransactionCreateDTO;
+import cn.iocoder.mall.pay.dataobject.PayTransactionDO;
+import org.mapstruct.Mapper;
+import org.mapstruct.Mappings;
+import org.mapstruct.factory.Mappers;
+
+@Mapper
+public interface PayTransactionConvert {
+
+    PayTransactionConvert INSTANCE = Mappers.getMapper(PayTransactionConvert.class);
+
+    @Mappings({})
+    PayTransactionDO convert(PayTransactionCreateDTO payTransactionCreateDTO);
+
+    @Mappings({})
+    PayTransactionBO convert(PayTransactionDO payTransactionDO);
+
+}
\ No newline at end of file
diff --git a/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/dao/PayAppMapper.java b/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/dao/PayAppMapper.java
new file mode 100644
index 000000000..c8138b027
--- /dev/null
+++ b/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/dao/PayAppMapper.java
@@ -0,0 +1,12 @@
+package cn.iocoder.mall.pay.dao;
+
+import cn.iocoder.mall.pay.dataobject.PayAppDO;
+import org.apache.ibatis.annotations.Param;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface PayAppMapper {
+
+    PayAppDO selectById(@Param("id") String id);
+
+}
\ No newline at end of file
diff --git a/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/dao/PayTransactionMapper.java b/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/dao/PayTransactionMapper.java
new file mode 100644
index 000000000..a1ba6e4d2
--- /dev/null
+++ b/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/dao/PayTransactionMapper.java
@@ -0,0 +1,11 @@
+package cn.iocoder.mall.pay.dao;
+
+import cn.iocoder.mall.pay.dataobject.PayTransactionDO;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface PayTransactionMapper {
+
+    void insert(PayTransactionDO entity);
+
+}
\ No newline at end of file
diff --git a/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/dataobject/PayAppDO.java b/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/dataobject/PayAppDO.java
index 8604cb2e9..3150d82c9 100644
--- a/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/dataobject/PayAppDO.java
+++ b/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/dataobject/PayAppDO.java
@@ -3,7 +3,7 @@ package cn.iocoder.mall.pay.dataobject;
 import cn.iocoder.common.framework.dataobject.BaseDO;
 
 /**
- * TODO 支付应用（业务线）DO
+ * 支付应用（业务线）DO
  */
 public class PayAppDO extends BaseDO {
 
@@ -11,5 +11,53 @@ public class PayAppDO extends BaseDO {
      * 应用编号
      */
     private String id;
+    /**
+     * 应用名
+     */
+    private String name;
+    /**
+     * 异步通知地址
+     */
+    private String notifyUrl;
+    /**
+     * 状态
+     */
+    private Integer status;
+
+    public String getId() {
+        return id;
+    }
+
+    public PayAppDO setId(String id) {
+        this.id = id;
+        return this;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public PayAppDO setName(String name) {
+        this.name = name;
+        return this;
+    }
+
+    public String getNotifyUrl() {
+        return notifyUrl;
+    }
+
+    public PayAppDO setNotifyUrl(String notifyUrl) {
+        this.notifyUrl = notifyUrl;
+        return this;
+    }
+
+    public Integer getStatus() {
+        return status;
+    }
+
+    public PayAppDO setStatus(Integer status) {
+        this.status = status;
+        return this;
+    }
 
 }
\ No newline at end of file
diff --git a/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/dataobject/PayNotifyAppLogDO.java b/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/dataobject/PayNotifyAppLogDO.java
deleted file mode 100644
index 7eb38d46a..000000000
--- a/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/dataobject/PayNotifyAppLogDO.java
+++ /dev/null
@@ -1,7 +0,0 @@
-package cn.iocoder.mall.pay.dataobject;
-
-/**
- *
- */
-public class PayNotifyAppLogDO {
-}
diff --git a/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/dataobject/PayRepeatTransactionDO.java b/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/dataobject/PayRepeatTransactionDO.java
index 04bb30132..23660a7d3 100644
--- a/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/dataobject/PayRepeatTransactionDO.java
+++ b/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/dataobject/PayRepeatTransactionDO.java
@@ -2,6 +2,8 @@ package cn.iocoder.mall.pay.dataobject;
 
 /**
  * TODO 重复支付的交易
+ *
+ * 可能不靠这个表，而是差错处理。
  */
 public class PayRepeatTransactionDO {
 }
diff --git a/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/dataobject/PayTransactionDO.java b/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/dataobject/PayTransactionDO.java
index 8398b64fe..0556f0da4 100644
--- a/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/dataobject/PayTransactionDO.java
+++ b/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/dataobject/PayTransactionDO.java
@@ -33,15 +33,6 @@ public class PayTransactionDO extends BaseDO {
      * 2. 每个 appId 下，orderId 唯一
      */
     private String orderId;
-    /**
-     * 订单状态
-     *
-     * 0 ： 等待支付
-     * 1 ： 待付款完成
-     * 2 ： 该笔交易已关闭 TODO 交易关闭，是不是订单系统触发
-     * -1 ： 支付失败 TODO 怎么触发
-     */
-    private Integer orderStatus;
     /**
      * 订单商品名
      */
@@ -60,16 +51,38 @@ public class PayTransactionDO extends BaseDO {
      * TODO 暂时不考虑货币类型。
      */
     private Integer price;
+    /**
+     * 订单状态
+     *
+     * @see cn.iocoder.mall.pay.api.constant.PayTransactionStatusEnum
+     */
+    private Integer status;
     /**
      * 交易过期时间
      */
-    private Integer expireTime;
+    private Date expireTime;
+    /**
+     * 回调业务线完成时间
+     */
+    private Date finishTime;
+
 
     // TODO return url
-    // TODO notify url
+    /**
+     * 异步通知地址
+     */
+    private String notifyUrl;
 
+    /**
+     * 成功支付的交易拓展编号
+     *
+     * @see PayTransactionExtensionDO#getId()
+     */
+    private Integer extensionId;
     /**
      * 支付成功的支付渠道
+     *
+     * @see cn.iocoder.mall.pay.api.constant.PayChannelEnum
      */
     private Integer payChannel;
     /**
@@ -123,12 +136,12 @@ public class PayTransactionDO extends BaseDO {
         return this;
     }
 
-    public Integer getOrderStatus() {
-        return orderStatus;
+    public Integer getStatus() {
+        return status;
     }
 
-    public PayTransactionDO setOrderStatus(Integer orderStatus) {
-        this.orderStatus = orderStatus;
+    public PayTransactionDO setStatus(Integer status) {
+        this.status = status;
         return this;
     }
 
@@ -150,15 +163,6 @@ public class PayTransactionDO extends BaseDO {
         return this;
     }
 
-    public Integer getExpireTime() {
-        return expireTime;
-    }
-
-    public PayTransactionDO setExpireTime(Integer expireTime) {
-        this.expireTime = expireTime;
-        return this;
-    }
-
     public Date getPaymentTime() {
         return paymentTime;
     }
@@ -212,4 +216,40 @@ public class PayTransactionDO extends BaseDO {
         this.orderMemo = orderMemo;
         return this;
     }
+
+    public Date getExpireTime() {
+        return expireTime;
+    }
+
+    public PayTransactionDO setExpireTime(Date expireTime) {
+        this.expireTime = expireTime;
+        return this;
+    }
+
+    public Date getFinishTime() {
+        return finishTime;
+    }
+
+    public PayTransactionDO setFinishTime(Date finishTime) {
+        this.finishTime = finishTime;
+        return this;
+    }
+
+    public Integer getExtensionId() {
+        return extensionId;
+    }
+
+    public PayTransactionDO setExtensionId(Integer extensionId) {
+        this.extensionId = extensionId;
+        return this;
+    }
+
+    public String getNotifyUrl() {
+        return notifyUrl;
+    }
+
+    public PayTransactionDO setNotifyUrl(String notifyUrl) {
+        this.notifyUrl = notifyUrl;
+        return this;
+    }
 }
\ No newline at end of file
diff --git a/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/dataobject/PayTransactionExtensionDO.java b/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/dataobject/PayTransactionExtensionDO.java
index 43cc8f3c2..b396db16c 100644
--- a/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/dataobject/PayTransactionExtensionDO.java
+++ b/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/dataobject/PayTransactionExtensionDO.java
@@ -21,14 +21,10 @@ public class PayTransactionExtensionDO extends BaseDO {
     private Integer payChannel;
     /**
      * 生成传输给第三方的订单号
+     *
+     * 唯一索引
      */
     private String transactionCode;
-    /**
-     * 发起调用的次数
-     *
-     * TODO 芋艿，需要去请教下
-     */
-    private Integer callNum;
     /**
      * 扩展内容
      *
@@ -39,6 +35,13 @@ public class PayTransactionExtensionDO extends BaseDO {
      * 发起交易的 IP
      */
     private String createIp;
+    /**
+     * 状态
+     *
+     * @see cn.iocoder.mall.pay.api.constant.PayTransactionStatusEnum
+     * 注意，只包含上述枚举的 WAITTING 和 SUCCESS
+     */
+    private Integer status;
 
     public Integer getId() {
         return id;
@@ -76,15 +79,6 @@ public class PayTransactionExtensionDO extends BaseDO {
         return this;
     }
 
-    public Integer getCallNum() {
-        return callNum;
-    }
-
-    public PayTransactionExtensionDO setCallNum(Integer callNum) {
-        this.callNum = callNum;
-        return this;
-    }
-
     public String getExtensionData() {
         return extensionData;
     }
@@ -103,4 +97,13 @@ public class PayTransactionExtensionDO extends BaseDO {
         return this;
     }
 
+    public Integer getStatus() {
+        return status;
+    }
+
+    public PayTransactionExtensionDO setStatus(Integer status) {
+        this.status = status;
+        return this;
+    }
+
 }
\ No newline at end of file
diff --git a/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/dataobject/PayTransactionNotifyLogDO.java b/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/dataobject/PayTransactionNotifyLogDO.java
new file mode 100644
index 000000000..3320eab8c
--- /dev/null
+++ b/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/dataobject/PayTransactionNotifyLogDO.java
@@ -0,0 +1,67 @@
+package cn.iocoder.mall.pay.dataobject;
+
+import cn.iocoder.common.framework.dataobject.BaseDO;
+
+/**
+ * 支付交易通知 App 的日志 DO
+ *
+ * 通过该表，记录通知 App 时，产生的日志
+ */
+public class PayTransactionNotifyLogDO extends BaseDO {
+
+    /**
+     * 日志编号，自增
+     */
+    private Integer id;
+    /**
+     * 请求参数
+     */
+    private String request;
+    /**
+     * 响应结果
+     */
+    private String response;
+    /**
+     * 状态
+     *
+     * @see cn.iocoder.mall.pay.api.constant.PayTransactionNotifyStatusEnum
+     */
+    private Integer status;
+
+    public Integer getId() {
+        return id;
+    }
+
+    public PayTransactionNotifyLogDO setId(Integer id) {
+        this.id = id;
+        return this;
+    }
+
+    public String getRequest() {
+        return request;
+    }
+
+    public PayTransactionNotifyLogDO setRequest(String request) {
+        this.request = request;
+        return this;
+    }
+
+    public String getResponse() {
+        return response;
+    }
+
+    public PayTransactionNotifyLogDO setResponse(String response) {
+        this.response = response;
+        return this;
+    }
+
+    public Integer getStatus() {
+        return status;
+    }
+
+    public PayTransactionNotifyLogDO setStatus(Integer status) {
+        this.status = status;
+        return this;
+    }
+
+}
\ No newline at end of file
diff --git a/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/dataobject/PayTransactionNotifyTaskDO.java b/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/dataobject/PayTransactionNotifyTaskDO.java
new file mode 100644
index 000000000..d4c4364eb
--- /dev/null
+++ b/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/dataobject/PayTransactionNotifyTaskDO.java
@@ -0,0 +1,139 @@
+package cn.iocoder.mall.pay.dataobject;
+
+import cn.iocoder.common.framework.dataobject.BaseDO;
+
+import java.util.Date;
+
+/**
+ * 支付交易通知 App 的任务 DO
+ */
+public class PayTransactionNotifyTaskDO extends BaseDO {
+
+    /**
+     * 编号，自增
+     */
+    private Integer id;
+    /**
+     * 交易编号
+     *
+     * {@link PayTransactionDO#getId()}
+     */
+    private Integer transactionId;
+    /**
+     * 交易拓展编号
+     *
+     * {@link PayTransactionExtensionDO#getId()}
+     */
+    private Integer transactionExtensionId;
+    /**
+     * 应用编号
+     */
+    private String appId;
+    /**
+     * 应用订单编号
+     */
+    private String orderId;
+    /**
+     * 通知状态
+     *
+     * @see cn.iocoder.mall.pay.api.constant.PayTransactionNotifyStatusEnum
+     */
+    private Integer status;
+    /**
+     * 最后一次通知时间
+     */
+    private Date lastNotifyTime;
+    /**
+     * 当前通知次数
+     */
+    private Integer notifyTimes;
+    /**
+     * 最大可通知次数
+     */
+    private Integer maxNotifyTimes;
+
+    // TODO notify url
+
+
+    public Integer getTransactionId() {
+        return transactionId;
+    }
+
+    public PayTransactionNotifyTaskDO setTransactionId(Integer transactionId) {
+        this.transactionId = transactionId;
+        return this;
+    }
+
+    public String getAppId() {
+        return appId;
+    }
+
+    public PayTransactionNotifyTaskDO setAppId(String appId) {
+        this.appId = appId;
+        return this;
+    }
+
+    public String getOrderId() {
+        return orderId;
+    }
+
+    public PayTransactionNotifyTaskDO setOrderId(String orderId) {
+        this.orderId = orderId;
+        return this;
+    }
+
+    public Integer getStatus() {
+        return status;
+    }
+
+    public PayTransactionNotifyTaskDO setStatus(Integer status) {
+        this.status = status;
+        return this;
+    }
+
+    public Date getLastNotifyTime() {
+        return lastNotifyTime;
+    }
+
+    public PayTransactionNotifyTaskDO setLastNotifyTime(Date lastNotifyTime) {
+        this.lastNotifyTime = lastNotifyTime;
+        return this;
+    }
+
+    public Integer getNotifyTimes() {
+        return notifyTimes;
+    }
+
+    public PayTransactionNotifyTaskDO setNotifyTimes(Integer notifyTimes) {
+        this.notifyTimes = notifyTimes;
+        return this;
+    }
+
+    public Integer getMaxNotifyTimes() {
+        return maxNotifyTimes;
+    }
+
+    public PayTransactionNotifyTaskDO setMaxNotifyTimes(Integer maxNotifyTimes) {
+        this.maxNotifyTimes = maxNotifyTimes;
+        return this;
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public PayTransactionNotifyTaskDO setId(Integer id) {
+        this.id = id;
+        return this;
+    }
+
+    public Integer getTransactionExtensionId() {
+        return transactionExtensionId;
+    }
+
+    public PayTransactionNotifyTaskDO setTransactionExtensionId(Integer transactionExtensionId) {
+        this.transactionExtensionId = transactionExtensionId;
+        return this;
+    }
+
+}
\ No newline at end of file
diff --git a/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/scheduler/PayNotifyAppJob.java b/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/scheduler/PayNotifyAppJob.java
new file mode 100644
index 000000000..91f6745cc
--- /dev/null
+++ b/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/scheduler/PayNotifyAppJob.java
@@ -0,0 +1,12 @@
+package cn.iocoder.mall.pay.scheduler;
+
+/**
+ * TODO
+ */
+public class PayNotifyAppJob {
+
+    // TODO 需要考虑下是基于 MQ 还是 Job
+    // TODO 通知频率
+    // TODO rpc 泛化回调
+
+}
\ No newline at end of file
diff --git a/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/service/PayAppServiceImpl.java b/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/service/PayAppServiceImpl.java
new file mode 100644
index 000000000..7bdee653f
--- /dev/null
+++ b/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/service/PayAppServiceImpl.java
@@ -0,0 +1,31 @@
+package cn.iocoder.mall.pay.service;
+
+import cn.iocoder.common.framework.constant.CommonStatusEnum;
+import cn.iocoder.common.framework.util.ServiceExceptionUtil;
+import cn.iocoder.common.framework.vo.CommonResult;
+import cn.iocoder.mall.pay.api.constant.PayErrorCodeEnum;
+import cn.iocoder.mall.pay.dao.PayAppMapper;
+import cn.iocoder.mall.pay.dataobject.PayAppDO;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class PayAppServiceImpl {
+
+    @Autowired
+    private PayAppMapper payAppMapper;
+
+    public CommonResult<PayAppDO> validPayApp(String appId) {
+        PayAppDO payAppDO = payAppMapper.selectById(appId);
+        // 校验是否存在
+        if (payAppDO == null) {
+            return ServiceExceptionUtil.error(PayErrorCodeEnum.PAY_APP_NOT_FOUND.getCode());
+        }
+        // 校验是否禁用
+        if (CommonStatusEnum.DISABLE.getValue().equals(payAppDO.getStatus())) {
+            return ServiceExceptionUtil.error(PayErrorCodeEnum.PAY_APP_IS_DISABLE.getCode());
+        }
+        return CommonResult.success(payAppDO);
+    }
+
+}
\ No newline at end of file
diff --git a/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/service/PayServiceImpl.java b/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/service/PayServiceImpl.java
index 8d4a9c82f..5ba872134 100644
--- a/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/service/PayServiceImpl.java
+++ b/pay/pay-service-impl/src/main/java/cn/iocoder/mall/pay/service/PayServiceImpl.java
@@ -1,9 +1,44 @@
 package cn.iocoder.mall.pay.service;
 
-import cn.iocoder.mall.pay.api.PayService;
+import cn.iocoder.common.framework.vo.CommonResult;
+import cn.iocoder.mall.pay.api.PayTransactionService;
+import cn.iocoder.mall.pay.api.bo.PayTransactionBO;
+import cn.iocoder.mall.pay.api.dto.PayTransactionCreateDTO;
+import cn.iocoder.mall.pay.dao.PayTransactionMapper;
+import cn.iocoder.mall.pay.dataobject.PayAppDO;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
 @Service
 @com.alibaba.dubbo.config.annotation.Service(validation = "true")
-public class PayServiceImpl implements PayService {
-}
+public class PayServiceImpl implements PayTransactionService {
+
+    @Autowired
+    private PayTransactionMapper payTransactionMapper;
+    @Autowired
+    private PayAppServiceImpl payAppService;
+
+    @Override
+    public CommonResult<PayTransactionBO> createTransaction(PayTransactionCreateDTO payTransactionCreateDTO) {
+        // 校验 App
+        CommonResult<PayAppDO> appResult = payAppService.validPayApp(payTransactionCreateDTO.getAppId());
+        if (appResult.isError()) {
+            return CommonResult.error(appResult);
+        }
+        // 插入 PayTransactionDO
+        return null;
+    }
+
+    @Override
+    public CommonResult submitTransaction() {
+        return null;
+    }
+
+    @Override
+    public CommonResult cancelTransaction() {
+        return null;
+    }
+
+
+
+}
\ No newline at end of file
diff --git a/pay/pay-service-impl/src/main/resources/mapper/PayAppMapper.xml b/pay/pay-service-impl/src/main/resources/mapper/PayAppMapper.xml
new file mode 100644
index 000000000..b581aae1f
--- /dev/null
+++ b/pay/pay-service-impl/src/main/resources/mapper/PayAppMapper.xml
@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="cn.iocoder.mall.pay.dao.PayAppMapper">
+
+    <sql id="FIELDS">
+        id, name, status, create_time
+    </sql>
+
+    <!--<insert id="insert" parameterType="RoleDO" useGeneratedKeys="true" keyColumn="id" keyProperty="id">-->
+        <!--INSERT INTO role (-->
+          <!--name, create_time, deleted-->
+        <!--) VALUES (-->
+          <!--#{name}, #{createTime}, #{deleted}-->
+        <!--)-->
+    <!--</insert>-->
+
+    <!--<update id="update" parameterType="RoleDO">-->
+        <!--UPDATE role-->
+        <!--<set>-->
+            <!--<if test="name != null">-->
+                <!--, name = #{name}-->
+            <!--</if>-->
+            <!--<if test="deleted != null">-->
+                <!--, deleted = #{deleted}-->
+            <!--</if>-->
+        <!--</set>-->
+        <!--WHERE id = #{id}-->
+    <!--</update>-->
+
+    <select id="selectById" parameterType="Integer" resultType="PayAppDO">
+        SELECT
+            <include refid="FIELDS"/>
+        FROM app
+        WHERE id = #{id}
+    </select>
+
+</mapper>
\ No newline at end of file
diff --git a/publish_admin.sh b/publish_admin.sh
deleted file mode 100644
index a9a2ca64c..000000000
--- a/publish_admin.sh
+++ /dev/null
@@ -1,3 +0,0 @@
-#!/usr/bin/env bash
-sh build_admin.sh
-scp admin/admin-application/target/admin-application-1.0-SNAPSHOT.jar runner@192.168.88.10:/work2/project/admin
\ No newline at end of file