Add basic key management to the processor

processor/src/wallet.rs

@@ -0,0 +1,30 @@
+use frost::{Curve, MultisigKeys};
+
+use crate::Coin;
+
+struct Wallet<C: Coin> {
+  keys: MultisigKeys<C::Curve>,
+  outputs: Vec<C::Output>
+}
+
+impl<C: Coin> Wallet<C> {
+  fn new(keys: &MultisigKeys<C::Curve>) -> Wallet<C> {
+    Wallet {
+      keys: keys.offset(
+        C::Curve::hash_to_F(
+          // Use distinct keys on each network by applying an additive offset
+          // While it would be fine to just C::id(), including the group key creates distinct
+          // offsets instead of static offsets. Under a statically offset system, a BTC key could
+          // have X subtracted to find the potential group key, and then have Y added to find the
+          // potential BCH group key. While this shouldn't be an issue, as this isn't a private
+          // system, there are potentially other benefits to binding this to a specific group key
+          &[b"Serai Processor Wallet", C::id(), &C::Curve::G_to_bytes(&keys.group_key())].concat()
+        )
+      ),
+
+      outputs: vec![]
+    }
+  }
+
+  async fn poll() { todo!() }
+}