Expose internal node to localhost only (#2455)

* Remove unused import

* Comparison to None, True should be 'if cond is None:'

* Expose internal node to localhost only

src/cryptoadvance/specter/process_controller/elementsd_controller.py

@@ -70,17 +70,14 @@ def construct_node_cmd(
         btcd_cmd += " -validatepegin=0 "
         btcd_cmd += " -txindex=1 "
         btcd_cmd += " -initialfreecoins=2100000000000000 "
-        btcd_cmd += " -port={} -rpcport={} -rpcbind=0.0.0.0".format(
-            rpcconn.rpcport + 1, rpcconn.rpcport
-        )
+        btcd_cmd += " -port={} -rpcport={}".format(rpcconn.rpcport + 1, rpcconn.rpcport)
         btcd_cmd += " -rpcuser={} -rpcpassword={} ".format(
             rpcconn.rpcuser, rpcconn.rpcpassword
         )
-        btcd_cmd += " -rpcallowip=0.0.0.0/0 -rpcallowip=172.17.0.0/16 "
         if not run_docker:
             if not log_stdout:
                 btcd_cmd += " -noprinttoconsole"
-            if datadir == None:
+            if datadir is None:
                 datadir = tempfile.mkdtemp(prefix="bitcoind_datadir")
             btcd_cmd += ' -datadir="{}" '.format(datadir)
         print(f"extra_args={extra_args})")

src/cryptoadvance/specter/process_controller/node_controller.py

@@ -1,11 +1,11 @@
 """ Stuff to control a bitcoind-instance.
 """
+
 import atexit
 import json
 import logging
 import os
 import platform
-import re
 import shutil
 import signal
 import subprocess
@@ -48,7 +48,7 @@ def __init__(
 
     @property
     def ipaddress(self):
-        if self._ipaddress == None:
+        if self._ipaddress is None:
             raise Exception("ipadress is none")
         else:
             return self._ipaddress
@@ -73,7 +73,7 @@ def get_rpc(self):
         return rpc
 
     def render_url(self, password_mask=False):
-        if password_mask == True:
+        if password_mask is True:
             password = "xxxxxx"
         else:
             password = self.rpcpassword
@@ -226,7 +226,7 @@ def stop_node(self):
 
     def mine(self, address=None, block_count=1):
         """Does mining to the attached address with as many as block_count blocks"""
-        if address == None:
+        if address is None:
             if self.node_impl == "bitcoin":
                 address = "mruae2834buqxk77oaVpephnA5ZAxNNJ1r"
             else:
@@ -358,17 +358,14 @@ def construct_node_cmd(
         if network != "mainnet" and network != "main":
             btcd_cmd += " -{} ".format(network)
         btcd_cmd += " -fallbackfee=0.0002 "
-        btcd_cmd += " -port={} -rpcport={} -rpcbind=0.0.0.0 -rpcbind=0.0.0.0".format(
-            rpcconn.rpcport - 1, rpcconn.rpcport
-        )
+        btcd_cmd += " -port={} -rpcport={}".format(rpcconn.rpcport - 1, rpcconn.rpcport)
         btcd_cmd += " -rpcuser={} -rpcpassword={} ".format(
             rpcconn.rpcuser, rpcconn.rpcpassword
         )
-        btcd_cmd += " -rpcallowip=0.0.0.0/0 -rpcallowip=172.17.0.0/16 "
         if not run_docker:
             if not log_stdout:
                 btcd_cmd += " -noprinttoconsole"
-            if datadir == None:
+            if datadir is None:
                 datadir = tempfile.mkdtemp(prefix="bitcoind_datadir")
             btcd_cmd += ' -datadir="{}" '.format(datadir)
         if extra_args:
@@ -412,7 +409,7 @@ def _start_node(
         log_stdout=False,
         extra_args=[],
     ):
-        if datadir == None:
+        if datadir is None:
             datadir = tempfile.mkdtemp(
                 prefix=f"specter_{self.node_impl}_regtest_plain_datadir_"
             )
@@ -484,7 +481,7 @@ def cleanup_node(self, cleanup_hard=None, datadir=None):
         if not hasattr(self, "datadir"):
             self.datadir = None
 
-        if cleanup_hard == None:
+        if cleanup_hard is None:
             cleanup_hard = self.cleanup_hard
         if not hasattr(self, "node_proc"):
             logger.info("node process was not running")