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Smash the singular Ciphersuite trait into multiple

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This helps identify where the various functionalities are used, or rather, not
used. The `Ciphersuite` trait present in `patches/ciphersuite`, facilitating
the entire FCMP++ tree, only requires the markers _and_ canonical point
decoding. I've opened a PR to upstream such a trait into `group`
(https://github.com/zkcrypto/group/pull/68).

`WrappedGroup` is still justified for as long as `Group::generator` exists.
Moving `::generator()` to its own trait, on an independent structure (upstream)
would be massively appreciated. @tarcieri also wanted to update from
`fn generator()` to `const GENERATOR`, which would encourage further discussion
on https://github.com/zkcrypto/group/issues/32 and
https://github.com/zkcrypto/group/issues/45, which have been stagnant.

The `Id` trait is occasionally used yet really should be first off the chopping
block.

Finally, `WithPreferredHash` is only actually used around a third of the time,
which more than justifies it being a separate trait.

---

Updates `dalek_ff_group::Scalar` to directly re-export
`curve25519_dalek::Scalar`, as without issue. `dalek_ff_group::RistrettoPoint`
also could be replaced with an export of `curve25519_dalek::RistrettoPoint`,
yet the coordinator relies on how we implemented `Hash` on it for the hell of
it so it isn't worth it at this time. `dalek_ff_group::EdwardsPoint` can't be
replaced for an re-export of `curve25519_dalek::SubgroupPoint` as it doesn't
implement `zeroize`, `subtle` traits within a released, non-yanked version.
Relevance to https://github.com/serai-dex/serai/issues/201 and
https://github.com/dalek-cryptography/curve25519-dalek/issues/811#issuecomment-3247732746.

Also updates the `Ristretto` ciphersuite to prefer `Blake2b-512` over
`SHA2-512`. In order to maintain compliance with FROST's IETF standard,
`modular-frost` defines its own ciphersuite for Ristretto which still uses
`SHA2-512`.
This commit is contained in:
Luke Parker
2025-09-03 12:25:37 -04:00
parent 215e41fdb6
commit a141deaf36
124 changed files with 1003 additions and 1211 deletions
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10
coordinator/tributary-sdk/src/mempool.rs
View File

@@ -1,7 +1,7 @@
use std::collections::HashMap;
use dalek_ff_group::Ristretto;
use ciphersuite::Ciphersuite;
use ciphersuite::*;
use serai_db::{DbTxn, Db};
@@ -21,9 +21,9 @@ pub(crate) struct Mempool<D: Db, T: TransactionTrait> {
db: D,
genesis: [u8; 32],
last_nonce_in_mempool: HashMap<(<Ristretto as Ciphersuite>::G, Vec<u8>), u32>,
last_nonce_in_mempool: HashMap<(<Ristretto as WrappedGroup>::G, Vec<u8>), u32>,
txs: HashMap<[u8; 32], Transaction<T>>,
txs_per_signer: HashMap<<Ristretto as Ciphersuite>::G, u32>,
txs_per_signer: HashMap<<Ristretto as WrappedGroup>::G, u32>,
}
impl<D: Db, T: TransactionTrait> Mempool<D, T> {
@@ -107,7 +107,7 @@ impl<D: Db, T: TransactionTrait> Mempool<D, T> {
// Returns Ok(true) if new, Ok(false) if an already present unsigned, or the error.
pub(crate) fn add<
N: Network,
F: FnOnce(<Ristretto as Ciphersuite>::G, Vec<u8>) -> Option<u32>,
F: FnOnce(<Ristretto as WrappedGroup>::G, Vec<u8>) -> Option<u32>,
>(
&mut self,
blockchain_next_nonce: F,
@@ -179,7 +179,7 @@ impl<D: Db, T: TransactionTrait> Mempool<D, T> {
// Returns None if the mempool doesn't have a nonce tracked.
pub(crate) fn next_nonce_in_mempool(
&self,
signer: &<Ristretto as Ciphersuite>::G,
signer: &<Ristretto as WrappedGroup>::G,
order: Vec<u8>,
) -> Option<u32> {
self.last_nonce_in_mempool.get(&(*signer, order)).copied().map(|nonce| nonce + 1)