Smash Ciphersuite definitions into their own crates

Uses dalek-ff-group for Ed25519 and Ristretto. Uses minimal-ed448 for Ed448.
Adds ciphersuite-kp256 for Secp256k1 and P-256.

coordinator/src/tributary/db.rs

@@ -3,7 +3,8 @@ use std::collections::HashMap;
 use scale::Encode;
 use borsh::{BorshSerialize, BorshDeserialize};
 
-use ciphersuite::{group::GroupEncoding, Ciphersuite, Ristretto};
+use dalek_ff_group::Ristretto;
+use ciphersuite::{group::GroupEncoding, Ciphersuite};
 use frost::Participant;
 
 use serai_client::validator_sets::primitives::{KeyPair, ExternalValidatorSet};

coordinator/src/tributary/handle.rs

@@ -4,7 +4,8 @@ use std::collections::HashMap;
 use zeroize::Zeroizing;
 use rand_core::OsRng;
 
-use ciphersuite::{group::GroupEncoding, Ciphersuite, Ristretto};
+use dalek_ff_group::Ristretto;
+use ciphersuite::{group::GroupEncoding, Ciphersuite};
 use frost::dkg::Participant;
 
 use scale::{Encode, Decode};

coordinator/src/tributary/mod.rs

@@ -1,4 +1,5 @@
-use ciphersuite::{group::GroupEncoding, Ciphersuite, Ristretto};
+use dalek_ff_group::Ristretto;
+use ciphersuite::{group::GroupEncoding, Ciphersuite};
 
 use serai_client::validator_sets::primitives::ExternalValidatorSet;
 

coordinator/src/tributary/scanner.rs

@@ -3,7 +3,8 @@ use std::{sync::Arc, collections::HashSet};
 
 use zeroize::Zeroizing;
 
-use ciphersuite::{group::GroupEncoding, Ciphersuite, Ristretto};
+use dalek_ff_group::Ristretto;
+use ciphersuite::{group::GroupEncoding, Ciphersuite};
 
 use tokio::sync::broadcast;
 

coordinator/src/tributary/signing_protocol.rs

@@ -63,9 +63,10 @@ use rand_core::OsRng;
 
 use blake2::{Digest, Blake2s256};
 
+use dalek_ff_group::Ristretto;
 use ciphersuite::{
   group::{ff::PrimeField, GroupEncoding},
-  Ciphersuite, Ristretto,
+  Ciphersuite,
 };
 use dkg_musig::musig;
 use frost::{FrostError, dkg::Participant, ThresholdKeys, sign::*};

coordinator/src/tributary/spec.rs

@@ -3,7 +3,8 @@ use std::{io, collections::HashMap};
 
 use transcript::{Transcript, RecommendedTranscript};
 
-use ciphersuite::{group::GroupEncoding, Ciphersuite, Ristretto};
+use dalek_ff_group::Ristretto;
+use ciphersuite::{group::GroupEncoding, Ciphersuite};
 use frost::Participant;
 
 use scale::Encode;

coordinator/src/tributary/transaction.rs

@@ -7,9 +7,10 @@ use rand_core::{RngCore, CryptoRng};
 use blake2::{Digest, Blake2s256};
 use transcript::{Transcript, RecommendedTranscript};
 
+use dalek_ff_group::Ristretto;
 use ciphersuite::{
   group::{ff::Field, GroupEncoding},
-  Ciphersuite, Ristretto,
+  Ciphersuite,
 };
 use schnorr::SchnorrSignature;
 use frost::Participant;