split cart and checkout and checkout vs payments

proto/checkout.proto

@@ -0,0 +1,106 @@
+syntax = "proto3";
+package checkout_messages;
+option go_package = "git.k6n.net/go-cart-actor/proto/checkout;checkout_messages";
+
+import "google/protobuf/any.proto";
+import "google/protobuf/timestamp.proto";
+
+message SetDelivery {
+  string provider = 1;
+  repeated uint32 items = 2;
+  optional PickupPoint pickupPoint = 3;
+  string country = 4;
+  string zip = 5;
+  optional string address = 6;
+  optional string city = 7;
+}
+
+message SetPickupPoint {
+  uint32 deliveryId = 1;
+  PickupPoint pickupPoint = 2;
+}
+
+message PickupPoint {
+    string id = 2;
+    optional string name = 3;
+    optional string address = 4;
+    optional string city = 5;
+    optional string zip = 6;
+    optional string country = 7;
+}
+
+message RemoveDelivery { uint32 id = 1; }
+
+message PaymentStarted {
+  string paymentId = 1;
+  int64 amount = 3;
+  string currency = 4;
+  string provider = 5;
+  optional string method = 6;
+  optional google.protobuf.Timestamp startedAt = 7;
+  repeated uint32 items = 2;
+}
+
+message PaymentCompleted {
+  string paymentId = 1;
+  string status = 2;
+  int64 amount = 3;
+  string currency = 4;
+  optional string processorReference = 5;
+  optional google.protobuf.Timestamp completedAt = 6;
+}
+
+message PaymentDeclined {
+  string paymentId = 1;
+  string message = 2;
+  optional string code = 3;
+}
+
+message PaymentEvent {
+    string paymentId = 1;
+    string name = 2;
+    bool success = 3;
+    google.protobuf.Any data = 4;
+}
+
+message ConfirmationViewed {
+ google.protobuf.Timestamp viewedAt = 1;
+}
+
+message OrderCreated {
+  string orderId = 1;
+  string status = 2;
+  google.protobuf.Timestamp createdAt = 3;
+}
+
+message InitializeCheckout {
+  string orderId = 1;
+  uint64 cartId = 2;
+  uint32 version = 3;
+  google.protobuf.Any cartState = 4;
+}
+
+message InventoryReserved  {
+    string id = 1;
+    string status = 2;
+    optional string message = 3;
+}
+
+message Mutation {
+  oneof type {
+    SetDelivery set_delivery = 1;
+    SetPickupPoint set_pickup_point = 2;
+    RemoveDelivery remove_delivery = 3;
+    PaymentDeclined payment_declined = 4;
+    ConfirmationViewed confirmation_viewed = 5;
+
+    OrderCreated order_created = 7;
+
+    InitializeCheckout initialize_checkout = 9;
+    InventoryReserved inventory_reserved = 10;
+    PaymentStarted payment_started = 11;
+    PaymentCompleted payment_completed = 12;
+    PaymentEvent payment_event = 13;
+
+  }
+}