rpc: make address field optional

test/functional/wallet_listtransactions.py

@@ -109,6 +109,7 @@ class ListTransactionsTest(BitcoinTestFramework):
         self.run_rbf_opt_in_test()
         self.run_externally_generated_address_test()
         self.run_invalid_parameters_test()
+        self.test_op_return()
 
     def run_rbf_opt_in_test(self):
         """Test the opt-in-rbf flag for sent and received transactions."""
@@ -284,6 +285,17 @@ class ListTransactionsTest(BitcoinTestFramework):
         assert_raises_rpc_error(-8, "Negative count", self.nodes[0].listtransactions, count=-1)
         assert_raises_rpc_error(-8, "Negative from", self.nodes[0].listtransactions, skip=-1)
 
+    def test_op_return(self):
+        """Test if OP_RETURN outputs will be displayed correctly."""
+        raw_tx = self.nodes[0].createrawtransaction([], [{'data': 'aa'}])
+        funded_tx = self.nodes[0].fundrawtransaction(raw_tx)
+        signed_tx = self.nodes[0].signrawtransactionwithwallet(funded_tx['hex'])
+        tx_id = self.nodes[0].sendrawtransaction(signed_tx['hex'])
+
+        op_ret_tx = [tx for tx in self.nodes[0].listtransactions() if tx['txid'] == tx_id][0]
+
+        assert 'address' not in op_ret_tx
+
 
 if __name__ == '__main__':
     ListTransactionsTest().main()