#pragma once

#include <optional>
#include <stdint.h>
#include <vector>

#include "expiring_signature.h"
#include "signing_key.h"
#include "time_helpers.h"

namespace BareMinimumCrypto {
	using namespace std;
	
	struct Sender {
		static optional <Sender> create (SigningKey k, ExpiringSignature c);
		
		// Signs data and attaches our cert from the CA
		optional <vector <uint8_t>> sign (const vector <uint8_t> & data) const;
		
	private:
		SigningKey sender_key;
		ExpiringSignature cert;
		
		vector <uint8_t> try_sign (const vector <uint8_t> & data, Instant now) const; 
		optional <vector <uint8_t>> sign (const vector <uint8_t> & data, Instant now) const;
	};
}