diff --git a/docs/ENVIRONMENT.rst b/docs/ENVIRONMENT.rst
index cd7872c..c489b9f 100644
--- a/docs/ENVIRONMENT.rst
+++ b/docs/ENVIRONMENT.rst
@@ -13,6 +13,11 @@ Required
 
 These environment variables are always required:
 
+* **COIN**
+
+  Must be a *NAME* from one of the **Coin** classes in
+  `lib/coins.py`_.
+
 * **DB_DIRECTORY**
 
   The path to the database directory.  Relative paths should be
@@ -53,11 +58,6 @@ Miscellaneous
 
 These environment variables are optional:
 
-* **COIN**
-
-  Must be a *NAME* from one of the **Coin** classes in
-  `lib/coins.py`_.  Defaults to `Bitcoin`.
-
 * **NET**
 
   Must be a *NET* from one of the **Coin** classes in `lib/coins.py`_.
diff --git a/lib/coins.py b/lib/coins.py
index 94344bb..4f9be0e 100644
--- a/lib/coins.py
+++ b/lib/coins.py
@@ -317,8 +317,7 @@ class AuxPowMixin(object):
         return deserializer.read_header(height, cls.BASIC_HEADER_SIZE)
 
 
-class Bitcoin(Coin):
-    NAME = "Bitcoin"
+class BitcoinMixin(object):
     SHORTNAME = "BTC"
     NET = "mainnet"
     XPUB_VERBYTES = bytes.fromhex("0488b21e")
@@ -332,6 +331,11 @@ class Bitcoin(Coin):
     TX_COUNT_HEIGHT = 464000
     TX_PER_BLOCK = 1800
     RPC_PORT = 8332
+
+
+class BitcoinCash(BitcoinMixin, Coin):
+    NAME = "BitcoinCash"
+    SHORTNAME = "BCC"
     PEERS = [
         'electroncash.bitcoinplug.com s t',
         'electrum-abc.criptolayer.net s50012',
@@ -344,10 +348,9 @@ class Bitcoin(Coin):
     ]
 
 
-class BitcoinSegwit(Bitcoin):
-    NET = "bitcoin-segwit"
+class BitcoinSegwit(BitcoinMixin, Coin):
+    NAME = "BitcoinSegwit"
     DESERIALIZER = DeserializerSegWit
-
     PEERS = [
         'btc.smsys.me s995',
         'electrum.be s t',
@@ -365,7 +368,8 @@ class BitcoinSegwit(Bitcoin):
         'ELEX01.blackpole.online s t',
     ]
 
-class BitcoinTestnet(Bitcoin):
+
+class BitcoinTestnetMixin(object):
     SHORTNAME = "XTN"
     NET = "testnet"
     XPUB_VERBYTES = bytes.fromhex("043587cf")
@@ -381,6 +385,11 @@ class BitcoinTestnet(Bitcoin):
     TX_PER_BLOCK = 21
     RPC_PORT = 18332
     PEER_DEFAULT_PORTS = {'t': '51001', 's': '51002'}
+
+
+class BitcoinCashTestnet(BitcoinTestnetMixin, Coin):
+    '''Bitcoin Testnet for Bitcoin Cash daemons.'''
+    NAME = "BitcoinCash"
     PEERS = [
         'electrum.akinbo.org s t',
         'he36kyperp3kbuxu.onion s t',
@@ -391,44 +400,34 @@ class BitcoinTestnet(Bitcoin):
     ]
 
 
-class BitcoinRegtest(BitcoinTestnet):
+class BitcoinSegwitTestnet(BitcoinTestnetMixin, Coin):
+    '''Bitcoin Testnet for Core bitcoind >= 0.13.1.'''
+    NAME = "BitcoinSegwit"
+    DESERIALIZER = DeserializerSegWit
+
+
+class BitcoinSegwitRegtest(BitcoinSegwitTestnet):
+    NAME = "BitcoinSegwit"
     NET = "regtest"
     GENESIS_HASH = ('0f9188f13cb7b2c71f2a335e3a4fc328'
                     'bf5beb436012afca590b1a11466e2206')
     PEERS= []
     TX_COUNT = 1
     TX_COUNT_HEIGHT = 1
-    DESERIALIZER = DeserializerSegWit
 
 
-class BitcoinTestnetSegWit(BitcoinTestnet):
-    '''Bitcoin Testnet for Core bitcoind >= 0.13.1.
-
-    Unfortunately 0.13.1 broke backwards compatibility of the RPC
-    interface's TX serialization, SegWit transactions serialize
-    differently than with earlier versions.  If you are using such a
-    bitcoind on testnet, you must use this class as your "COIN".
-    '''
-    NET = "testnet-segwit"
-    DESERIALIZER = DeserializerSegWit
-
-
-class BitcoinNolnet(Bitcoin):
+class BitcoinNolnet(BitcoinCash):
     '''Bitcoin Unlimited nolimit testnet.'''
-
     NET = "nolnet"
     GENESIS_HASH = ('0000000057e31bd2066c939a63b7b862'
                     '3bd0f10d8c001304bdfc1a7902ae6d35')
+    PEERS = []
     REORG_LIMIT = 8000
     TX_COUNT = 583589
     TX_COUNT_HEIGHT = 8617
     TX_PER_BLOCK = 50
-    IRC_PREFIX = "EN_"
     RPC_PORT = 28332
     PEER_DEFAULT_PORTS = {'t': '52001', 's': '52002'}
-    PEERS = [
-        '14.3.140.101 s t',
-    ]
 
 
 class Litecoin(Coin):
diff --git a/server/env.py b/server/env.py
index cd2d0e9..f5a6c3d 100644
--- a/server/env.py
+++ b/server/env.py
@@ -31,7 +31,7 @@ class Env(lib_util.LoggedClass):
         self.obsolete(['UTXO_MB', 'HIST_MB', 'NETWORK'])
         self.db_dir = self.required('DB_DIRECTORY')
         self.daemon_url = self.required('DAEMON_URL')
-        coin_name = self.default('COIN', 'Bitcoin')
+        coin_name = self.required('COIN')
         network = self.default('NET', 'mainnet')
         self.coin = Coin.lookup_coin_class(coin_name, network)
         self.cache_MB = self.integer('CACHE_MB', 1200)