monero/src/mnemonics/electrum-words.h

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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.
 */

#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
  {
    /*!
     * \brief Called to initialize it to work with a word list file.
     * \param language      Language of the word list file.
     * \param old_word_list Whether it is to use the old style word list file.
     */
    void init(const std::string &language, bool old_word_list=false);
    
    /*!
     * \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.
     * \return       false if not a multiple of 3 words, or if word is not in the words list
     */
    bool words_to_bytes(const std::string& words, crypto::secret_key& dst);

    /*!
     * \brief Converts bytes (secret key) to seed words.
     * \param  src   Secret key
     * \param  words Space delimited concatenated words get written here.
     * \return       true if successful false if not. Unsuccessful if wrong key size.
     */
    bool bytes_to_words(const crypto::secret_key& src, std::string& words);

    /*!
     * \brief Gets a list of seed languages that are supported.
     * \param languages The list of languages gets added to this vector.
     */
    void get_language_list(std::vector<std::string> &languages);

    /*!
     * \brief If the module is currenly using an old style word list.
     * \return true if it is currenly using an old style word list false if not.
     */
    bool get_is_old_style_word_list();

    /*!
     * \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);
  }
}