syntax = "proto3";

package trading.v1;

option java_package = "com.example.trading.contracts.v1";
option java_multiple_files = true;
option java_outer_classname = "OrderContract";

service OrderService {
  rpc SubmitOrder(SubmitOrderRequest) returns (SubmitOrderResponse);
}

message SubmitOrderRequest {
  string client_order_id = 1;
  string symbol = 2;
  Side side = 3;
  // Decimal text avoids binary floating-point rounding for trading values.
  string quantity = 4;
  string limit_price = 5;
  string sender_comp_id = 6;
  string target_comp_id = 7;
  // ISO-8601 local date (yyyy-MM-dd), supplied explicitly by the caller.
  string trading_date = 8;
}

enum Side {
  SIDE_UNSPECIFIED = 0;
  SIDE_BUY = 1;
  SIDE_SELL = 2;
}

message SubmitOrderResponse {
  string order_id = 1;
  OrderDecision decision = 2;
  string reject_reason = 3;
}

enum OrderDecision {
  ORDER_DECISION_UNSPECIFIED = 0;
  ACCEPTED = 1;
  REJECTED = 2;
}