124 lines
No EOL
4.2 KiB
Rust
124 lines
No EOL
4.2 KiB
Rust
// Copyright 2023 The Grim Developers
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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use grin_keychain::mnemonic::{from_entropy, search, to_entropy};
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use rand::{Rng, thread_rng};
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use crate::wallet::types::{PhraseMode, PhraseSize};
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/// Mnemonic phrase container.
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pub struct Mnemonic {
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/// Phrase setup mode.
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pub(crate) mode: PhraseMode,
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/// Size of phrase based on words count.
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pub(crate) size: PhraseSize,
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/// Generated words.
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pub(crate) words: Vec<String>,
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/// Words to confirm the phrase.
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pub(crate) confirm_words: Vec<String>
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}
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impl Default for Mnemonic {
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fn default() -> Self {
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let size = PhraseSize::Words24;
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let mode = PhraseMode::Generate;
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let words = Self::generate_words(&mode, &size);
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let confirm_words = Self::empty_words(&size);
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Self { mode, size, words, confirm_words }
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}
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}
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impl Mnemonic {
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/// Change mnemonic phrase setup [`PhraseMode`].
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pub fn set_mode(&mut self, mode: PhraseMode) {
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self.mode = mode;
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self.words = Self::generate_words(&self.mode, &self.size);
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self.confirm_words = Self::empty_words(&self.size);
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}
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/// Change mnemonic phrase words [`PhraseSize`].
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pub fn set_size(&mut self, size: PhraseSize) {
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self.size = size;
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self.words = Self::generate_words(&self.mode, &self.size);
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self.confirm_words = Self::empty_words(&self.size);
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}
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/// Check if provided word is in BIP39 format and equal to non-empty generated word at index.
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pub fn is_valid_word(&self, word: &String, index: usize) -> bool {
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let valid = search(word).is_ok();
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let equal = if let Some(gen_word) = self.words.get(index) {
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gen_word.is_empty() || gen_word == word
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} else {
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false
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};
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valid && equal
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}
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/// Check if current phrase is valid.
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pub fn is_valid_phrase(&self) -> bool {
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to_entropy(self.get_phrase().as_str()).is_ok()
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}
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/// Get phrase from words.
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pub fn get_phrase(&self) -> String {
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self.words.iter().map(|x| x.to_string() + " ").collect::<String>()
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}
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/// Generate list of words based on provided [`PhraseMode`] and [`PhraseSize`].
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fn generate_words(mode: &PhraseMode, size: &PhraseSize) -> Vec<String> {
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match mode {
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PhraseMode::Generate => {
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let mut rng = thread_rng();
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let mut entropy: Vec<u8> = Vec::with_capacity(size.entropy_size());
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for _ in 0..size.entropy_size() {
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entropy.push(rng.gen());
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}
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from_entropy(&entropy).unwrap()
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.split(" ")
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.map(|s| String::from(s))
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.collect::<Vec<String>>()
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},
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PhraseMode::Import => {
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Self::empty_words(size)
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}
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}
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}
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/// Generate empty list of words based on provided [`PhraseSize`].
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fn empty_words(size: &PhraseSize) -> Vec<String> {
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let mut words = Vec::with_capacity(size.value());
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for _ in 0..size.value() {
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words.push(String::from(""))
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}
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words
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}
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/// Set words from provided text if possible.
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pub fn import_text(&mut self, text: String) {
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if self.mode != PhraseMode::Import {
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return;
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}
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let words_split = text.trim().split(" ");
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let count = words_split.clone().count();
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if PhraseSize::is_correct_count(count) {
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if self.size == PhraseSize::type_for_value(count).unwrap() {
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let mut words = vec![];
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words_split.enumerate().for_each(|(i, word)| {
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words.insert(i, word.to_string())
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});
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self.words = words;
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}
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}
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}
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} |