支付模块，发起交易，暂时是比较 demo 的代码。未完成~

pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/PayTransactionService.java

@@ -2,13 +2,15 @@ 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.bo.PayTransactionSubmitBO;
 import cn.iocoder.mall.pay.api.dto.PayTransactionCreateDTO;
+import cn.iocoder.mall.pay.api.dto.PayTransactionSubmitDTO;
 
 public interface PayTransactionService {
 
     CommonResult<PayTransactionBO> createTransaction(PayTransactionCreateDTO payTransactionCreateDTO);
 
-    CommonResult submitTransaction(); // TODO 1. params 2. result
+    CommonResult<PayTransactionSubmitBO> submitTransaction(PayTransactionSubmitDTO payTransactionSubmitDTO);
 
     CommonResult cancelTransaction(); // TODO 1. params 2. result
 

pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/bo/PayTransactionSubmitBO.java

@@ -0,0 +1,35 @@
+package cn.iocoder.mall.pay.api.bo;
+
+/**
+ * 支付交易提交结果 BO
+ */
+public class PayTransactionSubmitBO {
+
+    /**
+     * 支付交易拓展单编号
+     */
+    private Integer id;
+    /**
+     * 调用三方平台的响应结果
+     */
+    private String invokeResponse;
+
+    public Integer getId() {
+        return id;
+    }
+
+    public PayTransactionSubmitBO setId(Integer id) {
+        this.id = id;
+        return this;
+    }
+
+    public String getInvokeResponse() {
+        return invokeResponse;
+    }
+
+    public PayTransactionSubmitBO setInvokeResponse(String invokeResponse) {
+        this.invokeResponse = invokeResponse;
+        return this;
+    }
+
+}

pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/constant/PayChannelEnum.java

@@ -8,7 +8,10 @@ public enum PayChannelEnum {
     WEIXIN_APP(100, "wx", "微信 App 支付"),
     WEIXIN_PUB(100, "wx", "微信 JS API 支付"),
 
-    ALIPAY(200, "alipay", "微信支付");
+    ALIPAY(200, "alipay", "微信支付"),
+
+    PINGXX(9999, "ping++", "ping++ 支付"),
+    ;
 
     /**
      * 渠道编号

pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/constant/PayErrorCodeEnum.java

@@ -12,7 +12,8 @@ public enum PayErrorCodeEnum {
     PAY_APP_IS_DISABLE(1004000001, "App 已经被禁用"),
 
     // ========== TRANSACTION 模块 ==========
-
+    PAY_TRANSACTION_NOT_FOUND(100401000, "支付交易单不存在"),
+    PAY_TRANSACTION_STATUS_IS_NOT_WAITING(100401001, "支付交易单不处于待支付"),
 
     ;
 

pay/pay-service-api/src/main/java/cn/iocoder/mall/pay/api/dto/PayTransactionSubmitDTO.java

@@ -0,0 +1,68 @@
+package cn.iocoder.mall.pay.api.dto;
+
+import javax.validation.constraints.NotEmpty;
+import javax.validation.constraints.NotNull;
+
+/**
+ * 支付交易提交 DTO
+ */
+public class PayTransactionSubmitDTO {
+
+    /**
+     * 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;
+    /**
+     * 支付渠道
+     */
+    @NotNull(message = "支付渠道")
+    private Integer payChannel;
+
+    public String getAppId() {
+        return appId;
+    }
+
+    public PayTransactionSubmitDTO setAppId(String appId) {
+        this.appId = appId;
+        return this;
+    }
+
+    public String getCreateIp() {
+        return createIp;
+    }
+
+    public PayTransactionSubmitDTO setCreateIp(String createIp) {
+        this.createIp = createIp;
+        return this;
+    }
+
+    public String getOrderId() {
+        return orderId;
+    }
+
+    public PayTransactionSubmitDTO setOrderId(String orderId) {
+        this.orderId = orderId;
+        return this;
+    }
+
+    public Integer getPayChannel() {
+        return payChannel;
+    }
+
+    public PayTransactionSubmitDTO setPayChannel(Integer payChannel) {
+        this.payChannel = payChannel;
+        return this;
+    }
+
+}