diff --git a/domain-layer/payment/payment.proto b/domain-layer/payment/payment.proto
index 68161cc..079a907 100644
--- a/domain-layer/payment/payment.proto
+++ b/domain-layer/payment/payment.proto
@@ -3,7 +3,6 @@ syntax = "proto3";
 package topcoder.domain.payment;
 
 import "common/common.proto";
-import "domain-layer/payment/payment_detail.proto";
 
 message Payment {
   int64 payment_id = 1;
@@ -14,7 +13,6 @@ message Payment {
   optional string create_date = 6;  // DATETIME YEAR TO FRACTION (3)
   optional string modify_date = 7;  // DATETIME YEAR TO FRACTION (3)
   optional bool has_global_ad = 8;
-  optional topcoder.domain.payment.PaymentDetailList details = 9;
 }
 
 message PaymentList {
@@ -26,6 +24,8 @@ message Payee {
 }
 message Payable {
   float amount = 1;
+  optional float gross_amount = 2;
+  optional float total_amount = 3;
 }
 
 enum PaymentType {
@@ -33,6 +33,7 @@ enum PaymentType {
   PAYMENT_TYPE_WINNER = 1;
   PAYMENT_TYPE_COPILOT = 2;
   PAYMENT_TYPE_REVIEWER = 3;
+  PAYMENT_TYPE_CONTEST_PAYMENT = 4;
 }
 
 message TaskPayment {
@@ -52,6 +53,7 @@ message ChallengePayment {
   Payable payable = 5;
   optional int32 due_in_days = 6;
   string desc = 7;
+  sint32 installment_number = 8;
 }
 
 message CreatePaymentInput {
diff --git a/domain-layer/payment/payment_detail.proto b/domain-layer/payment/payment_detail.proto
index 9e0b010..2faa715 100644
--- a/domain-layer/payment/payment_detail.proto
+++ b/domain-layer/payment/payment_detail.proto
@@ -7,14 +7,14 @@ message PaymentDetail {
   float net_amount = 2;
   float gross_amount = 3;
   float total_amount = 4;
-  optional string date_paid = 5;
+  optional string date_paid = 5;  // DATETIME YEAR TO FRACTION (3)
   int32 payment_status_id = 6;
   optional int32 payment_address_id = 7;
   int32 modification_rationale_id = 8;
   string payment_desc = 9;
   int32 payment_type_id = 10;
-  string date_modified = 11;
-  string date_due = 12;
+  string date_modified = 11;  // DATETIME YEAR TO FRACTION (3)
+  string date_due = 12;       // DATETIME YEAR TO FRACTION (3)
   int32 payment_method_id = 13;
   optional string client = 14;
   optional int32 algorithm_round_id = 15;
@@ -26,12 +26,22 @@ message PaymentDetail {
   optional int32 digital_run_stage_id = 21;
   optional int32 digital_run_season_id = 22;
   optional int32 parent_payment_id = 23;
-  string create_date = 24;
+  string create_date = 24;  // DATETIME YEAR TO FRACTION (3)
   int32 charity_ind = 25;
   int32 installment_number = 26;
   int32 digital_run_track_id = 27;
   optional string jira_issue_id = 28;
-  int32 user_id = 29;
+  int32 create_user = 29;
+}
+
+message PaymentDetailXref {
+  int32 payment_id = 1;
+  int32 payment_detail_id = 2;
+}
+
+message PaymentDetailStatusReasonXref {
+  int32 payment_detail_id = 1;
+  int32 payment_status_reason_id = 2;
 }
 
 message PaymentDetailList {