feat: stacks signer able to save multiple dkg shares and load it where appropriate

.github/workflows/bitcoin-tests.yml

@@ -84,6 +84,7 @@ jobs:
           - tests::nakamoto_integrations::forked_tenure_is_ignored
           - tests::signer::stackerdb_dkg
           - tests::signer::stackerdb_sign_request_rejected
+          - tests::signer::stackerdb_recover_old_dkg_key
           - tests::signer::stackerdb_block_proposal
           - tests::signer::stackerdb_filter_bad_transactions
           - tests::signer::stackerdb_mine_2_nakamoto_reward_cycles

stacks-signer/src/lib.rs

@@ -34,3 +34,5 @@ pub mod runloop;
 pub mod signer;
 /// The state module for the signer
 pub mod signerdb;
+/// Utilities for storing and loading signer data
+pub mod storage;

stacks-signer/src/runloop.rs

@@ -228,7 +228,7 @@ impl RunLoop {
     }
 
     /// Refresh signer configuration for a specific reward cycle
-    fn refresh_signer_config(&mut self, reward_cycle: u64) {
+    fn refresh_signer_config(&mut self, reward_cycle: u64) -> Result<(), ClientError> {
         let reward_index = reward_cycle % 2;
         if let Some(new_signer_config) = self.get_signer_config(reward_cycle) {
             let signer_id = new_signer_config.signer_id;
@@ -256,6 +256,8 @@ impl RunLoop {
         } else {
             warn!("Signer is not registered for reward cycle {reward_cycle}. Waiting for confirmed registration...");
         }
+
+        Ok(())
     }
 
     fn initialize_runloop(&mut self) -> Result<(), ClientError> {
@@ -266,11 +268,11 @@ impl RunLoop {
                 .map_err(backoff::Error::transient)
         })?;
         let current_reward_cycle = reward_cycle_info.reward_cycle;
-        self.refresh_signer_config(current_reward_cycle);
+        self.refresh_signer_config(current_reward_cycle)?;
         // We should only attempt to initialize the next reward cycle signer if we are in the prepare phase of the next reward cycle
         if reward_cycle_info.is_in_next_prepare_phase(reward_cycle_info.last_burnchain_block_height)
         {
-            self.refresh_signer_config(current_reward_cycle.saturating_add(1));
+            self.refresh_signer_config(current_reward_cycle.saturating_add(1))?;
         }
         self.current_reward_cycle_info = Some(reward_cycle_info);
         if self.stacks_signers.is_empty() {
@@ -322,7 +324,7 @@ impl RunLoop {
                 .unwrap_or(true)
             {
                 info!("Received a new burnchain block height ({current_burn_block_height}) in the prepare phase of the next reward cycle ({next_reward_cycle}). Checking for signer registration...");
-                self.refresh_signer_config(next_reward_cycle);
+                self.refresh_signer_config(next_reward_cycle)?;
             }
         }
         self.cleanup_stale_signers(current_reward_cycle);