Test: Introduce test for p2pk signet chains (reusable as param genera…

…tor)

test/functional/feature_signet.py

@@ -0,0 +1,84 @@
+#!/usr/bin/env python3
+# Copyright (c) 2018-2018 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+"""Test signet
+
+Test chains that use signed blocks instead of pow (signets).
+"""
+
+from binascii import hexlify
+import os
+
+from test_framework import key, script
+from test_framework.test_framework import BitcoinTestFramework
+from test_framework.util import (
+    assert_equal,
+    connect_nodes_bi,
+    hex_str_to_bytes,
+)
+
+class SignetTest(BitcoinTestFramework):
+
+    def add_options(self, parser):
+        parser.add_argument('--config_path', dest='config_path', default='',
+                            help='Path to write down the generated config for signet into files.')
+
+    def set_test_params(self):
+        self.setup_clean_chain = True
+        self.num_nodes = 3
+        self.extra_args = [[
+            '-fallbackfee=0.00001',
+            '-addresstype=legacy',
+            '-deprecatedrpc=validateaddress',
+            '-bech32_hrp=sb',
+            '-pchmessagestart=F0C7706A',
+            '-pubkeyprefix=125',
+            '-scriptprefix=87',
+            '-secretprefix=217',
+            '-extpubkeyprefix=043587CF',
+            '-extprvkeyprefix=04358394',
+        ]] * 3
+
+    def setup_network(self):
+
+        self.add_nodes(self.num_nodes, self.extra_args)
+
+        self.start_node(2)
+        addr = self.nodes[2].getnewaddress()
+        k = key.CECKey()
+        pub = self.nodes[2].validateaddress(addr)['pubkey']
+        k.set_pubkey(hex_str_to_bytes(pub))
+        pubkey = key.CPubKey(k.get_pubkey())
+        wif = self.nodes[2].dumpprivkey(addr)
+        bscript = script.CScript([pubkey, script.OP_CHECKSIG])
+        blockscript = hexlify(bscript).decode('ascii')
+
+        if self.options.config_path == '':
+            self.log.info('Generated wif %s' % wif)
+            self.log.info('Generated blockscript %s' % blockscript)
+        else:
+            with open(os.path.join(self.options.config_path, 'wif.txt'), 'w', encoding='utf8') as f:
+                f.write(wif + '\n')
+            with open(os.path.join(self.options.config_path, 'signet_blockscript.txt'), 'w', encoding='utf8') as f:
+                f.write(blockscript + '\n')
+
+        for i in range(2):
+            self.extra_args[i].append('-signet_blockscript=%s' % blockscript)
+            self.start_node(i)
+            self.nodes[i].importprivkey(wif)
+        for i in range(2):
+            connect_nodes_bi(self.nodes, i, i + 1)
+        self.sync_all([self.nodes[0:1]])
+
+    def run_test(self):
+
+        self.nodes[0].generate(100)
+        self.sync_all([self.nodes[0:1]])
+        self.nodes[1].generate(100)
+        self.sync_all([self.nodes[0:1]])
+
+        assert_equal(self.nodes[0].getblockcount(), self.nodes[1].getblockcount())
+
+if __name__ == '__main__':
+    SignetTest().main()

test/functional/test_runner.py

@@ -119,6 +119,7 @@
     'p2p_invalid_block.py',
     'p2p_invalid_tx.py',
     'rpc_createmultisig.py',
+    'feature_signet.py',
     'feature_versionbits_warning.py',
     'rpc_preciousblock.py',
     'wallet_importprunedfunds.py',