Test validator set's voting on a key

Needed for the in-instructions pallet to verify in-instructions are
appropriately signed and continue developing that.

Fixes a bug in the validator-sets pallet, moves several items from the pallet
to primitives.

substrate/validator-sets/primitives/src/lib.rs

@@ -9,7 +9,12 @@ use scale_info::TypeInfo;
 #[cfg(feature = "std")]
 use serde::{Serialize, Deserialize};
 
-use serai_primitives::NetworkId;
+use sp_core::{ConstU32, sr25519, bounded::BoundedVec};
+
+use serai_primitives::{NetworkId, Network, Amount};
+
+// Support keys up to 96 bytes (BLS12-381 G2).
+const MAX_KEY_LEN: u32 = 96;
 
 /// The type used to identify a specific session of validators.
 #[derive(Clone, Copy, PartialEq, Eq, Hash, Debug, Encode, Decode, TypeInfo, MaxEncodedLen)]
@@ -23,3 +28,22 @@ pub struct ValidatorSet {
   pub session: Session,
   pub network: NetworkId,
 }
+
+/// The data for a validator set.
+#[derive(Clone, PartialEq, Eq, Debug, Encode, Decode, TypeInfo, MaxEncodedLen)]
+pub struct ValidatorSetData {
+  pub bond: Amount,
+  pub network: Network,
+
+  // Participant and their amount bonded to this set
+  // Limit each set to 100 participants for now
+  pub participants: BoundedVec<(sr25519::Public, Amount), ConstU32<100>>,
+}
+
+type MaxKeyLen = ConstU32<MAX_KEY_LEN>;
+/// The type representing a Key from an external network.
+pub type ExternalKey = BoundedVec<u8, MaxKeyLen>;
+
+/// A Validator Set's Ristretto key, used for signing InInstructions, and their key on the external
+/// network.
+pub type KeyPair = (sr25519::Public, ExternalKey);