test: ensure acceptstalefeeestimates is only supported on regtest c…

…hain

test/functional/feature_config_args.py

@@ -108,6 +108,29 @@ def test_config_file_parser(self):
         self.restart_node(0)
         self.nodes[0].stop_node(expected_stderr=f'Warning: {inc_conf_file_path}:1 Section [testnot] is not recognized.{os.linesep}{inc_conf_file2_path}:1 Section [testnet] is not recognized.')
 
+        with open(inc_conf_file_path, 'w', encoding='utf-8') as conf:
+            conf.write('')  # clear
+
+        self.log.info("test acceptstalefeeestimates option is not supported on mainnet chain.")
+        with open(inc_conf_file_path, 'w', encoding='utf-8') as conf:
+            conf.write('acceptstalefeeestimates=1\n')
+        self.nodes[0].assert_start_raises_init_error(extra_args=[f"-conf={main_conf_file_path}", "-allowignoredconf"], expected_msg='Error: acceptstalefeeestimates is not supported on main chain.')
+
+        self.log.info("test acceptstalefeeestimates option is not supported on testnet chain.")
+        with open(inc_conf_file_path, 'w', encoding='utf-8') as conf:
+            conf.write('testnet=1\n')
+            conf.write('acceptstalefeeestimates=1\n')
+        self.nodes[0].assert_start_raises_init_error(extra_args=[f"-conf={inc_conf_file_path}", "-allowignoredconf"], expected_msg='Error: acceptstalefeeestimates is not supported on test chain.')
+
+        with open(inc_conf_file_path, 'w', encoding='utf-8') as conf:
+            conf.write('')  # clear
+
+        self.log.info("test acceptstalefeeestimates option is not supported on signet chain.")
+        with open(inc_conf_file_path, 'w', encoding='utf-8') as conf:
+            conf.write('signet=1\n')
+            conf.write('acceptstalefeeestimates=1\n')
+        self.nodes[0].assert_start_raises_init_error(extra_args=[f"-conf={inc_conf_file_path}", "-allowignoredconf"], expected_msg='Error: acceptstalefeeestimates is not supported on signet chain.')
+
         with open(inc_conf_file_path, 'w', encoding='utf-8') as conf:
             conf.write('')  # clear
         with open(inc_conf_file2_path, 'w', encoding='utf-8') as conf:

test/functional/feature_fee_estimation.py

@@ -378,7 +378,7 @@ def test_acceptstalefeeestimates_option(self):
         os.utime(fee_dat, (last_modified_time, last_modified_time))
 
         # Restart node with -acceptstalefeeestimates option to ensure fee_estimate.dat file is read
-        self.start_node(0,extra_args=["-acceptstalefeeestimates"])
+        self.start_node(0, extra_args=["-acceptstalefeeestimates"])
         assert_equal(self.nodes[0].estimatesmartfee(1)["feerate"], fee_rate)