1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
use keccak::Keccak256;
use super::{KeyPair, Generator, Secret};
use parity_wordlist;
pub struct Brain(String);
impl Brain {
pub fn new(s: String) -> Self {
Brain(s)
}
pub fn validate_phrase(phrase: &str, expected_words: usize) -> Result<(), ::WordlistError> {
parity_wordlist::validate_phrase(phrase, expected_words)
}
}
impl Generator for Brain {
type Error = ::Void;
fn generate(&mut self) -> Result<KeyPair, Self::Error> {
let seed = self.0.clone();
let mut secret = seed.into_bytes().keccak256();
let mut i = 0;
loop {
secret = secret.keccak256();
match i > 16384 {
false => i += 1,
true => {
if let Ok(pair) = Secret::from_unsafe_slice(&secret)
.and_then(KeyPair::from_secret)
{
if pair.address()[0] == 0 {
trace!("Testing: {}, got: {:?}", self.0, pair.address());
return Ok(pair)
}
}
},
}
}
}
}
#[cfg(test)]
mod tests {
use {Brain, Generator};
#[test]
fn test_brain() {
let words = "this is sparta!".to_owned();
let first_keypair = Brain::new(words.clone()).generate().unwrap();
let second_keypair = Brain::new(words.clone()).generate().unwrap();
assert_eq!(first_keypair.secret(), second_keypair.secret());
}
}