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b/examples/simple_pow.rs @@ -0,0 +1,7 @@ + +use powlib::{self, gen::{POWRange, POWChallenge}}; + +fn main() { + let challenge = POWChallenge::make(POWRange::new(0, 20480)); + println!("{}", challenge.solve_singlethread()); +} \ No newline at end of file diff --git a/src/gen.rs b/src/gen.rs new file mode 100644 index 0000000..c9f4663 --- /dev/null +++ b/src/gen.rs @@ -0,0 +1,61 @@ + +use rand::random; + +use crate::{hash::hash_num, num::Num}; + +#[derive(Debug, Clone)] +pub struct POWRange { + min: u128, + max: u128 +} + +impl POWRange { + pub fn new(min: u128, max: u128) -> POWRange { + POWRange { min, max } + } +} + +#[derive(Debug)] +pub struct POWChallenge { + hash: [u8; 32], + range: POWRange +} + +impl POWChallenge { + pub fn new(hash: [u8; 32], range: POWRange) -> POWChallenge { + POWChallenge { hash, range } + } + + pub fn make(range: POWRange) -> POWChallenge { + let secret = (random::() % (range.max - range.min)) + range.min; + let secret = Num::new(secret); + POWChallenge { hash: hash_num(secret), range: range } + } + + pub fn make_from(num: Num, range: Option) -> POWChallenge { + POWChallenge { hash: hash_num(num), range: match range { + Some(v) => v, + None => POWRange { min: 0, max: num * 2 } + } } + } + + pub fn check(self: &POWChallenge, num: Num) -> bool { + hash_num(num) == self.hash + } + + pub fn chunk_solve(self: &POWChallenge, start: u128, end: u128) -> Option { + for i in start..end { + if self.check(Num::new(i)) { + return Some(i) + } + } + None + } + + pub fn solve_singlethread(self: &POWChallenge) -> u128 { + match self.chunk_solve(self.range.min, self.range.max) { + Some(v) => v, + None => panic!("Number not found in range") + } + } +} diff --git a/src/hash.rs b/src/hash.rs new file mode 100644 index 0000000..2723ab7 --- /dev/null +++ b/src/hash.rs @@ -0,0 +1,17 @@ +use scrypt::{scrypt, Params}; + +use crate::num::Num; + +const SALT: [u8; 0] = []; + +pub fn hash(data: &[u8], out: &mut [u8]) { + let params = Params::new(6, 6, 1, 32).unwrap(); + scrypt(data, &SALT.clone(), ¶ms, out).unwrap(); +} + +pub fn hash_num(num: Num) -> [u8; 32] { + let bnum = num.bytes(); + let mut out: [u8; 32] = [0; 32]; + hash(&bnum, &mut out); + out +} \ No newline at end of file diff --git a/src/lib.rs b/src/lib.rs new file mode 100644 index 0000000..59700e0 --- /dev/null +++ b/src/lib.rs @@ -0,0 +1,3 @@ +pub mod gen; +pub mod hash; +pub mod num; diff --git a/src/num.rs b/src/num.rs new file mode 100644 index 0000000..1997eac --- /dev/null +++ b/src/num.rs @@ -0,0 +1,25 @@ +#[derive(Clone, Copy)] +pub struct Num { + number: u128 +} + +impl Num { + pub fn new(num: u128) -> Num { + Num { number: num } + } + + pub fn bytes(self: &Num) -> [u8; 16] { + self.number.to_be_bytes() + } + + pub fn from_bytes(bytes: [u8; 16]) -> Num { + Num { number: u128::from_be_bytes(bytes) } + } +} + +impl std::ops::Mul for Num { + type Output = u128; + fn mul(self, rhs: u128) -> Self::Output { + self.number * rhs + } +} \ No newline at end of file