// Copyright (c) 2014-2017, The Monero Project
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/*!
* \file electrum-words.h
*
* \brief Mnemonic seed generation and wallet restoration from them.
*
* This file and its cpp file are for translating Electrum-style word lists
* into their equivalent byte representations for cross-compatibility with
* that method of "backing up" one's wallet keys.
*/
#ifndef ELECTRUM_WORDS_H
#define ELECTRUM_WORDS_H
#include <string>
#include <cstdint>
#include <map>
#include "crypto/crypto.h" // for declaration of crypto::secret_key
/*!
* \namespace crypto
*
* \brief crypto namespace.
*/
namespace crypto
{
/*!
* \namespace crypto::ElectrumWords
*
* \brief Mnemonic seed word generation and wallet restoration helper functions.
*/
namespace ElectrumWords
{
const int seed_length = 24;
const std::string old_language_name = "OldEnglish";
/*!
* \brief Converts seed words to bytes (secret key).
* \param words String containing the words separated by spaces.
* \param dst To put the secret key restored from the words.
* \param language_name Language of the seed as found gets written here.
* \return false if not a multiple of 3 words, or if word is not in the words list
*/
bool words_to_bytes(std::string words, crypto::secret_key& dst,
std::string &language_name);
/*!
* \brief Converts bytes (secret key) to seed words.
* \param src Secret key
* \param words Space delimited concatenated words get written here.
* \param language_name Seed language name
* \return true if successful false if not. Unsuccessful if wrong key size.
*/
bool bytes_to_words(const crypto::secret_key& src, std::string& words,
const std::string &language_name);
/*!
* \brief Gets a list of seed languages that are supported.
* \param languages A vector is set to the list of languages.
*/
void get_language_list(std::vector<std::string> &languages);
/*!
* \brief Tells if the seed passed is an old style seed or not.
* \param seed The seed to check (a space delimited concatenated word list)
* \return true if the seed passed is a old style seed false if not.
*/
bool get_is_old_style_seed(const std::string &seed);
}
}
#endif
