wallet2: do not commit transactions more than once

Fixes #8793

src/wallet/wallet2.cpp

@@ -6745,6 +6745,24 @@ void wallet2::commit_tx(pending_tx& ptx)
   crypto::hash txid;
 
   txid = get_transaction_hash(ptx.tx);
+
+  // if it's already processed, bail
+  if (std::find_if(m_transfers.begin(), m_transfers.end(), [&txid](const transfer_details &td) { return td.m_txid == txid; }) != m_transfers.end())
+  {
+    MDEBUG("Transaction " << txid << " already processed");
+    return;
+  }
+  if (m_unconfirmed_txs.find(txid) != m_unconfirmed_txs.end())
+  {
+    MDEBUG("Transaction " << txid << " already processed");
+    return;
+  }
+  if (m_confirmed_txs.find(txid) != m_confirmed_txs.end())
+  {
+    MDEBUG("Transaction " << txid << " already processed");
+    return;
+  }
+
   crypto::hash payment_id = crypto::null_hash;
   std::vector<cryptonote::tx_destination_entry> dests;
   uint64_t amount_in = 0;

tests/functional_tests/transfer.py

@@ -52,6 +52,7 @@ class TransferTest():
         self.check_tx_notes()
         self.check_rescan()
         self.check_is_key_image_spent()
+        self.check_multiple_submissions()
 
     def reset(self):
         print('Resetting blockchain')
@@ -829,6 +830,39 @@ class TransferTest():
         res = daemon.is_key_image_spent(ki)
         assert res.spent_status == expected
 
+    def check_multiple_submissions(self):
+        daemon = Daemon()
+
+        print('Testing multiple submissions')
+
+        dst = {'address': '42ey1afDFnn4886T7196doS9GPMzexD9gXpsZJDwVjeRVdFCSoHnv7KPbBeGpzJBzHRCAs9UxqeoyFQMYbqSWYTfJJQAWDm', 'amount': 1000000000000}
+
+        self.wallet[0].refresh()
+        res = self.wallet[0].get_balance()
+        balance = res.balance
+
+        res = self.wallet[0].transfer([dst], ring_size = 16, get_tx_key = False, get_tx_hex = False, get_tx_metadata = True)
+        tx_hex = res.tx_metadata
+        tx_fee = res.fee
+        res = self.wallet[0].relay_tx(tx_hex)
+
+        # submit again before mined
+        res = self.wallet[0].relay_tx(tx_hex)
+        daemon.generateblocks('44Kbx4sJ7JDRDV5aAhLJzQCjDz2ViLRduE3ijDZu3osWKBjMGkV1XPk4pfDUMqt1Aiezvephdqm6YD19GKFD9ZcXVUTp6BW', 1)
+
+        self.wallet[0].refresh()
+        res = self.wallet[0].get_balance()
+        assert res.balance == balance - tx_fee
+
+        balance = res.balance
+
+        # submit again after mined
+        res = self.wallet[0].relay_tx(tx_hex)
+        daemon.generateblocks('44Kbx4sJ7JDRDV5aAhLJzQCjDz2ViLRduE3ijDZu3osWKBjMGkV1XPk4pfDUMqt1Aiezvephdqm6YD19GKFD9ZcXVUTp6BW', 1)
+
+        self.wallet[0].refresh()
+        res = self.wallet[0].get_balance()
+        assert res.balance == balance
 
 if __name__ == '__main__':
     TransferTest().run_test()