From 4f85615734e782c9ff4ab1c95a96ae22d6d0aa12 Mon Sep 17 00:00:00 2001
From: Janus Troelsen <ysangkok@gmail.com>
Date: Fri, 22 Jun 2018 17:07:07 +0200
Subject: [PATCH] add simnet support (#4455)

---
 electrum             |  2 ++
 lib/commands.py      |  1 +
 lib/constants.py     | 11 +++++++++++
 lib/simple_config.py |  3 +++
 4 files changed, 17 insertions(+)

diff --git a/electrum b/electrum
index 6bef64b7b..150e4adab 100755
--- a/electrum
+++ b/electrum
@@ -401,6 +401,8 @@ if __name__ == '__main__':
         constants.set_testnet()
     elif config.get('regtest'):
         constants.set_regtest()
+    elif config.get('simnet'):
+        constants.set_simnet()
 
     # run non-RPC commands separately
     if cmdname in ['create', 'restore']:
diff --git a/lib/commands.py b/lib/commands.py
index f89ba62dd..71f7b2919 100644
--- a/lib/commands.py
+++ b/lib/commands.py
@@ -835,6 +835,7 @@ def add_global_options(parser):
     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")
+    group.add_argument("--simnet", action="store_true", dest="simnet", default=False, help="Use Simnet")
 
 def get_parser():
     # create main parser
diff --git a/lib/constants.py b/lib/constants.py
index 8642f0e16..939d738ce 100644
--- a/lib/constants.py
+++ b/lib/constants.py
@@ -101,9 +101,20 @@ class BitcoinRegtest(BitcoinTestnet):
     CHECKPOINTS = []
 
 
+class BitcoinSimnet(BitcoinTestnet):
+
+    SEGWIT_HRP = "sb"
+    GENESIS = "683e86bd5c6d110d91b94b97137ba6bfe02dbbdb8e3dff722a669b5d69d77af6"
+    DEFAULT_SERVERS = read_json('servers_regtest.json', {})
+    CHECKPOINTS = []
+
+
 # don't import net directly, import the module instead (so that net is singleton)
 net = BitcoinMainnet
 
+def set_simnet():
+    global net
+    net = BitcoinSimnet
 
 def set_mainnet():
     global net
diff --git a/lib/simple_config.py b/lib/simple_config.py
index 4f0168cc9..bc88f2667 100644
--- a/lib/simple_config.py
+++ b/lib/simple_config.py
@@ -113,6 +113,9 @@ class SimpleConfig(PrintError):
         elif self.get('regtest'):
             path = os.path.join(path, 'regtest')
             make_dir(path, allow_symlink=False)
+        elif self.get('simnet'):
+            path = os.path.join(path, 'simnet')
+            make_dir(path, allow_symlink=False)
 
         self.print_error("electrum directory", path)
         return path