add regtest support (#4242)

* add regtest support

* set default regtest ssl and tcp ports to 51002 and 51002

* regtest inherits parameters from testnet

electrum

@@ -401,6 +401,8 @@ if __name__ == '__main__':
 
     if config.get('testnet'):
         constants.set_testnet()
+    elif config.get('regtest'):
+        constants.set_regtest()
 
     # run non-RPC commands separately
     if cmdname in ['create', 'restore']:

lib/commands.py

@@ -817,6 +817,7 @@ def add_global_options(parser):
     group.add_argument("-P", "--portable", action="store_true", dest="portable", default=False, help="Use local 'electrum_data' directory")
     group.add_argument("-w", "--wallet", dest="wallet_path", help="wallet path")
     group.add_argument("--testnet", action="store_true", dest="testnet", default=False, help="Use Testnet")
+    group.add_argument("--regtest", action="store_true", dest="regtest", default=False, help="Use Regtest")
 
 def get_parser():
     # create main parser

lib/constants.py

@@ -93,6 +93,14 @@ class BitcoinTestnet:
     }
 
 
+class BitcoinRegtest(BitcoinTestnet):
+
+    SEGWIT_HRP = "bcrt"
+    GENESIS = "0f9188f13cb7b2c71f2a335e3a4fc328bf5beb436012afca590b1a11466e2206"
+    DEFAULT_SERVERS = read_json('servers_regtest.json', {})
+    CHECKPOINTS = []
+
+
 # don't import net directly, import the module instead (so that net is singleton)
 net = BitcoinMainnet
 
@@ -105,3 +113,8 @@ def set_mainnet():
 def set_testnet():
     global net
     net = BitcoinTestnet
+
+
+def set_regtest():
+    global net
+    net = BitcoinRegtest

lib/servers_regtest.json

@@ -0,0 +1,8 @@
+{
+    "127.0.0.1": {
+        "pruning": "-",
+        "s": "51002",
+        "t": "51001",
+        "version": "1.2"
+    }
+}

lib/simple_config.py

@@ -115,6 +115,9 @@ class SimpleConfig(PrintError):
         if self.get('testnet'):
             path = os.path.join(path, 'testnet')
             make_dir(path)
+        elif self.get('regtest'):
+            path = os.path.join(path, 'regtest')
+            make_dir(path)
 
         self.print_error("electrum directory", path)
         return path

setup.py

@@ -74,6 +74,7 @@ setup(
         'electrum': [
             'servers.json',
             'servers_testnet.json',
+            'servers_regtest.json',
             'currencies.json',
             'checkpoints.json',
             'checkpoints_testnet.json',