coins: Add PIVX

No CSV or segwit.
sethdseed requires a fully synced chain, manual intervention required to set a key derived from the master mnemonic.
Requires a pivxd version with a backported scantxoutset command.

tests/basicswap/common.py

@@ -14,6 +14,7 @@ from urllib.request import urlopen
 
 from basicswap.rpc import callrpc
 from basicswap.contrib.rpcauth import generate_salt, password_to_hmac
+from bin.basicswap_prepare import downloadPIVXParams
 
 
 TEST_HTTP_HOST = os.getenv('TEST_HTTP_HOST', '127.0.0.1')  # Set to 0.0.0.0 when used in docker
@@ -33,6 +34,10 @@ LTC_BASE_PORT = 34792
 LTC_BASE_RPC_PORT = 35792
 LTC_BASE_ZMQ_PORT = 36792
 
+PIVX_BASE_PORT = 34892
+PIVX_BASE_RPC_PORT = 35892
+PIVX_BASE_ZMQ_PORT = 36892
+
 PREFIX_SECRET_KEY_REGTEST = 0x2e
 
 
@@ -73,6 +78,11 @@ def prepareDataDir(datadir, node_id, conf_file, dir_prefix, base_p2p_port=BASE_P
             fp.write('stakethreadconddelayms=1000\n')
             fp.write('smsgsregtestadjust=0\n')
 
+        if conf_file == 'pivx.conf':
+            params_dir = os.path.join(datadir, 'pivx-params')
+            downloadPIVXParams(params_dir)
+            fp.write(f'paramsdir={params_dir}\n')
+
         for i in range(0, num_nodes):
             if node_id == i:
                 continue