Introducing new validate service version (v4) changing the validation…

… object to have the possibility to have multi-seat-selections for different segments

proto/cmp/services/book/v4/validate.proto

@@ -0,0 +1,59 @@
+syntax = "proto3";
+
+package cmp.services.book.v4;
+
+import "cmp/types/v1/common.proto";
+import "cmp/types/v1/uuid.proto";
+import "cmp/types/v2/price.proto";
+import "cmp/types/v2/search.proto";
+import "cmp/types/v3/seat_map.proto";
+
+message ValidationRequest {
+  // Message header
+  cmp.types.v1.RequestHeader header = 1;
+
+  // Validation object
+  cmp.services.book.v4.ValidationObject validation_object = 2;
+}
+
+message ValidationResponse {
+  // Message header
+  cmp.types.v1.ResponseHeader header = 1;
+
+  // Unique validation ID. This must be a UUID according to RFC 4122
+  cmp.types.v1.UUID validation_id = 2;
+
+  // Validation object
+  cmp.services.book.v4.ValidationObject validation_object = 3;
+
+  // Price details for the validated product
+  cmp.types.v2.PriceDetail price_detail = 4;
+}
+
+// Additional layer to allow for selecting seats in different segments.
+message SeatSelection {
+  // Segment ID for the seat selection (e.g. flight segment, concert segment - necessary as the seat map id may be the same for different segments)
+  string segment_id = 1;
+  // Seat selection based on the segment
+  cmp.types.v3.SeatMapInventory seat_map_inventory = 2;
+}
+
+// Validation message that represents a single `result_id` from the search results
+// message and also the optional `unit_identifier` for specific services that
+// requires it. For example a seat for a concert.
+message ValidationObject {
+  // Search result identifier with `search_id` & `result_id`
+  cmp.types.v2.SearchIdentifier search_identifier = 1;
+
+  // Optional seat selection for the validation
+  repeated SeatSelection seat_selections = 2;
+}
+
+// ![Diagram](https://storage.googleapis.com/docs-cmp-files/diagrams/proto/cmp/services/book/v3/validate.proto.dot.xs.svg)
+//
+// [Open Message Diagram](https://storage.googleapis.com/docs-cmp-files/diagrams/proto/cmp/services/book/v3/validate.proto.dot.svg)
+//
+/// @custom:cmp-service type:product routing:p2p on-chain:false
+service ValidationService {
+  rpc Validation(ValidationRequest) returns (ValidationResponse);
+}