refactor(proof_upgrader): Log error on failure; don't panic

If upgrading fails (whether in the course of transaction initaition
or third-party transaction proof upgrading), do not crash the
application; but log an error message instead.

Cf. #310.

Co-authored-by: Alan Szepieniec <[email protected]>

src/main_loop/proof_upgrader.rs

@@ -310,7 +310,15 @@ impl UpgradeJob {
                     (upgraded_tx, expected_utxos)
                 }
                 Err(e) => {
-                    panic!("UpgradeProof job failed. error: {}", e);
+                    error!("UpgradeProof job failed. error: {e}");
+                    error!("upgrading of witness or proof in {tx_origin} transaction failed.");
+                    error!(
+                        "Consider lowering your proving capability to {}, in case it is set higher.\nCurrent proving \
+                        capability is set to: {}.",
+                        TxProvingCapability::ProofCollection,
+                        global_state_lock.cli().proving_capability()
+                    );
+                    return;
                 }
             };
 

src/models/state/mempool.rs

@@ -101,6 +101,17 @@ impl TransactionOrigin {
     }
 }
 
+impl std::fmt::Display for TransactionOrigin {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        let output = match self {
+            TransactionOrigin::Foreign => "third-party",
+            TransactionOrigin::Own => "own",
+        };
+
+        write!(f, "{output}")
+    }
+}
+
 #[derive(Debug, GetSize, Clone, Serialize, Deserialize)]
 pub(crate) struct MempoolTransaction {
     pub(crate) transaction: Transaction,