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fix: skip using the field element containing the proof-of-work (#343)

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Al-Kindi-0 2024-11-18 09:16:27 +01:00 • committed by GitHub
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2 changed files with 5 additions and 2 deletions
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CHANGELOG.md
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@ -1,6 +1,7 @@
## 0.11.0 (2024-10-30) ## 0.11.0 (2024-10-30)
- [BREAKING] Updated Winterfell dependency to v0.10 (#338). - [BREAKING] Updated Winterfell dependency to v0.10 (#338).
- Fixed a bug in the implementation of `draw_integers` for `RpoRandomCoin` (#343).
## 0.11.0 (2024-10-17) ## 0.11.0 (2024-10-17)

6
src/rand/rpo.rs
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@ -145,8 +145,10 @@ impl RandomCoin for RpoRandomCoin {
self.state[RATE_START] += nonce; self.state[RATE_START] += nonce;
Rpo256::apply_permutation(&mut self.state); Rpo256::apply_permutation(&mut self.state);
// reset the buffer // reset the buffer and move the next random element pointer to the second rate element.
self.current = RATE_START; // this is done as the first rate element will be "biased" via the provided `nonce` to
// contain some number of leading zeros.
self.current = RATE_START + 1;
// determine how many bits are needed to represent valid values in the domain // determine how many bits are needed to represent valid values in the domain
let v_mask = (domain_size - 1) as u64; let v_mask = (domain_size - 1) as u64;