Added hashing result to PoW struct
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7654f2722e
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c1ec5d2a68
1 changed files with 11 additions and 7 deletions
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@ -2,12 +2,13 @@ use serde::{Deserialize, Serialize};
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use sha2::{digest::FixedOutput, Digest, Sha256};
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use std::marker::PhantomData;
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const SALT: &str = "35af8f4890981391c191e6df45b5f780812ddf0213f29299576ac1c98e18173e";
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const SALT: &str = "79ziepia7vhjgviiwjhnend3ofjqocsi2winc4ptqhmkvcajihywxcizewvckg9h6gs4j83v9";
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/// Proof of work over concrete type T. T can be any type that implements serde::Serialize.
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#[derive(Serialize, Deserialize, PartialEq, Clone, Copy, Debug)]
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pub struct Pow<T> {
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proof: u128,
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nonce: u128,
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result: u128,
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_spook: PhantomData<T>,
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}
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@ -36,11 +37,14 @@ impl<T: Serialize> Pow<T> {
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pub fn prove_work_serialized(prefix: &[u8], difficulty: u128) -> Pow<T> {
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let prefix_sha = Sha256::new().chain(SALT).chain(prefix);
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let mut n = 0;
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while score(prefix_sha.clone(), n) < difficulty {
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let mut result = 0;
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while result < difficulty {
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n += 1;
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result = score(prefix_sha.clone(), n);
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}
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Pow {
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proof: n,
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nonce: n,
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result: result,
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_spook: PhantomData,
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}
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}
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@ -55,14 +59,14 @@ impl<T: Serialize> Pow<T> {
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/// Calculate the pow score of an already serialized T and self.
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/// The input is assumed to be serialized using network byte order.
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pub fn score_serialized(&self, target: &[u8]) -> u128 {
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score(Sha256::new().chain(SALT).chain(target), self.proof)
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score(Sha256::new().chain(SALT).chain(target), self.nonce)
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}
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}
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fn score(prefix_sha: Sha256, proof: u128) -> u128 {
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fn score(prefix_sha: Sha256, nonce: u128) -> u128 {
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first_bytes_as_u128(
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prefix_sha
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.chain(&proof.to_be_bytes()) // to_be_bytes() converts to network endian
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.chain(&nonce.to_be_bytes()) // to_be_bytes() converts to network endian
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.fixed_result()
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.as_slice(),
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)
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