Minor work on the transaction signing task

processor/signers/src/lib.rs

@@ -0,0 +1,56 @@
+#![cfg_attr(docsrs, feature(doc_auto_cfg))]
+#![doc = include_str!("../README.md")]
+#![deny(missing_docs)]
+
+mod transaction;
+
+/*
+// The signers used by a Processor, key-scoped.
+struct KeySigners<D: Db, T: Clone + PreprocessMachine> {
+  transaction: AttemptManager<D, T>,
+  substrate: AttemptManager<D, AlgorithmMachine<Ristretto, Schnorrkel>>,
+  cosigner: AttemptManager<D, AlgorithmMachine<Ristretto, Schnorrkel>>,
+}
+
+/// The signers used by a protocol.
+pub struct Signers<D: Db, T: Clone + PreprocessMachine>(HashMap<Vec<u8>, KeySigners<D, T>>);
+
+impl<D: Db, T: Clone + PreprocessMachine> Signers<D, T> {
+  /// Create a new set of signers.
+  pub fn new(db: D) -> Self {
+    // TODO: Load the registered keys
+    // TODO: Load the transactions being signed
+    // TODO: Load the batches being signed
+    todo!("TODO")
+  }
+
+  /// Register a transaction to sign.
+  pub fn sign_transaction(&mut self) -> Vec<ProcessorMessage> {
+    todo!("TODO")
+  }
+  /// Mark a transaction as signed.
+  pub fn signed_transaction(&mut self) { todo!("TODO") }
+
+  /// Register a batch to sign.
+  pub fn sign_batch(&mut self, key: KeyFor<S>, batch: Batch) -> Vec<ProcessorMessage> {
+    todo!("TODO")
+  }
+  /// Mark a batch as signed.
+  pub fn signed_batch(&mut self, batch: u32) { todo!("TODO") }
+
+  /// Register a slash report to sign.
+  pub fn sign_slash_report(&mut self) -> Vec<ProcessorMessage> {
+    todo!("TODO")
+  }
+  /// Mark a slash report as signed.
+  pub fn signed_slash_report(&mut self) { todo!("TODO") }
+
+  /// Start a cosigning protocol.
+  pub fn cosign(&mut self) { todo!("TODO") }
+
+  /// Handle a message for a signing protocol.
+  pub fn handle(&mut self, msg: CoordinatorMessage) -> Vec<ProcessorMessage> {
+    todo!("TODO")
+  }
+}
+*/