syntax = "proto3";

package optionlookup;

service OptionLookupService { 
  // Returns options tickers for underlying ticker. 
  rpc GetOptionTickers (GetOptionTickersRequest) returns (GetOptionTickersResponse);
  // Returns options expiration dates for underlying ticker. 
  rpc GetOptionExpirations (GetOptionExpirationsRequest) returns (GetOptionExpirationsResponse);
}

message GetOptionTickersRequest {
   // Underlying ticker.
   string underlying_ticker = 1;
   // (optional) The type of the option contract.
   string option_type = 2;
   // (optional) The expiration date of the option contract.
   string expiration_date = 3;
}

message GetOptionTickersResponse {
   // Option tickers for the underlying ticker. 
   repeated Option options = 1;
   // Details of the error.
   string error = 2;
}

message GetOptionExpirationsRequest {
   // Underlying ticker.
   string underlying_ticker = 1;
}

message GetOptionExpirationsResponse {
   // Option Expiration dates for underlying ticker.
   repeated string expirations = 1;
   // Details of the error.
   string error = 2;
}

message Option {
	// The option ticker symbol.
    string ticker = 1;
	// Underlying ticker.
    string underlying_ticker = 2;
	// The expiration date of the option contract.
    string expiration_date = 3;
	// Type of the option contract.
    string option_type = 4;
	// Strike price of the option contract.
    double strike_price = 5;
}