fortuna/util.h

#ifndef FORTUNA_UTIL_H
#define FORTUNA_UTIL_H

#include <cryptopp/filters.h>
#include <cryptopp/hex.h>
#include <cryptopp/sha3.h>
#include <chrono>
#include <cstddef>

namespace fortuna {

class Util final {
public:
static constexpr const std::size_t gen_block_size{32}; // 256 bits

static auto do_sha(const std::string& str_to_hash) -> const std::string {
	// do sha256
	std::string digest;

	// no reason not to go for Keccak
	CryptoPP::SHA3_256 sha3_256;

	CryptoPP::StringSource str_src(str_to_hash, true,
		new CryptoPP::HashFilter (
			sha3_256, new CryptoPP::HexEncoder(
				new CryptoPP::StringSink(digest), false))
	);

	return digest;
}

static auto current_time() -> std::chrono::time_point<std::chrono::system_clock,
		std::chrono::duration<long, std::ratio<1, 1000000000>>> {
	return std::chrono::system_clock::now();
}

Util() = delete;
~Util() noexcept;

}; // class Util

} // namespace fortuna

#endif//FORTUNA_UTIL_H