Integrate Decred with wallet encryption.

dcrwallet requires the password to be entered at the first startup when encrypted.
basicswap-run with --startonlycoin=decred and the WALLET_ENCRYPTION_PWD environment var set can be used for the initial sync.

basicswap/basicswap.py

@@ -6861,6 +6861,12 @@ class BasicSwap(BaseApp):
                                 self.ci(coin).setAnonTxRingSize(new_anon_tx_ring_size)
                             break
 
+            if 'wallet_pwd' in data:
+                new_wallet_pwd = data['wallet_pwd']
+                if settings_cc.get('wallet_pwd', '') != new_wallet_pwd:
+                    settings_changed = True
+                    settings_cc['wallet_pwd'] = new_wallet_pwd
+
             if settings_changed:
                 settings_path = os.path.join(self.data_dir, cfg.CONFIG_FILENAME)
                 settings_path_new = settings_path + '.new'

basicswap/interface/btc.py

@@ -1379,7 +1379,7 @@ class BTCInterface(Secp256k1Interface):
             return True
         return False
 
-    def isWalletEncryptedLocked(self):
+    def isWalletEncryptedLocked(self) -> (bool, bool):
         wallet_info = self.rpc_wallet('getwalletinfo')
         encrypted = 'unlocked_until' in wallet_info
         locked = encrypted and wallet_info['unlocked_until'] <= 0

basicswap/interface/dcr/dcr.py

@@ -320,6 +320,44 @@ class DCRInterface(Secp256k1Interface):
         # Load with --create
         pass
 
+    def isWalletEncrypted(self) -> bool:
+        return True
+
+    def isWalletLocked(self) -> bool:
+        walletislocked = self.rpc_wallet('walletislocked')
+        return walletislocked
+
+    def isWalletEncryptedLocked(self) -> (bool, bool):
+        walletislocked = self.rpc_wallet('walletislocked')
+        return True, walletislocked
+
+    def changeWalletPassword(self, old_password: str, new_password: str):
+        self._log.info('changeWalletPassword - {}'.format(self.ticker()))
+        if old_password == '':
+            # Read initial pwd from settings
+            settings = self._sc.getChainClientSettings(self.coin_type())
+            old_password = settings['wallet_pwd']
+        self.rpc_wallet('walletpassphrasechange', [old_password, new_password])
+
+        # Lock wallet to match other coins
+        self.rpc_wallet('walletlock')
+
+        # Clear initial password
+        self._sc.editSettings(self.coin_name().lower(), {'wallet_pwd': ''})
+
+    def unlockWallet(self, password: str):
+        if password == '':
+            return
+        self._log.info('unlockWallet - {}'.format(self.ticker()))
+
+        # Max timeout value, ~3 years
+        self.rpc_wallet('walletpassphrase', [password, 100000000])
+        self._sc.checkWalletSeed(self.coin_type())
+
+    def lockWallet(self):
+        self._log.info('lockWallet - {}'.format(self.ticker()))
+        self.rpc_wallet('walletlock')
+
     def getWalletSeedID(self):
         masterpubkey = self.rpc_wallet('getmasterpubkey')
         masterpubkey_data = self.decode_address(masterpubkey)[4:]

bin/basicswap_prepare.py

@@ -1311,8 +1311,10 @@ def initialise_wallets(particl_wallet_mnemonic, with_coins, data_dir, settings,
                 if c == Coins.DCR:
                     if coin_settings['manage_wallet_daemon']:
                         from basicswap.interface.dcr.util import createDCRWallet
+
+                        dcr_password = coin_settings['wallet_pwd'] if WALLET_ENCRYPTION_PWD == '' else WALLET_ENCRYPTION_PWD
                         extra_opts = ['--appdata="{}"'.format(coin_settings['datadir']),
-                                      '--pass={}'.format(coin_settings['wallet_pwd']),
+                                      '--pass={}'.format(dcr_password),
                                       ]
 
                         filename = 'dcrwallet' + ('.exe' if os.name == 'nt' else '')
@@ -1381,6 +1383,9 @@ def initialise_wallets(particl_wallet_mnemonic, with_coins, data_dir, settings,
         else:
             print(f'WARNING - Failed to initialise wallet for {getCoinName(c)}: {e}')
 
+    if 'decred' in with_coins and WALLET_ENCRYPTION_PWD != '':
+        print('WARNING - dcrwallet requires the password to be entered at the first startup when encrypted.\nPlease use basicswap-run with --startonlycoin=decred and the WALLET_ENCRYPTION_PWD environment var set for the initial sync.')
+
     if particl_wallet_mnemonic is not None:
         if particl_wallet_mnemonic:
             # Print directly to stdout for tests
@@ -1693,7 +1698,7 @@ def main():
             'connection_type': 'rpc' if 'decred' in with_coins else 'none',
             'manage_daemon': True if ('decred' in with_coins and DCR_RPC_HOST == '127.0.0.1') else False,
             'manage_wallet_daemon': True if ('decred' in with_coins and DCR_WALLET_RPC_HOST == '127.0.0.1') else False,
-            'wallet_pwd': DCR_WALLET_PWD,
+            'wallet_pwd': DCR_WALLET_PWD if WALLET_ENCRYPTION_PWD == '' else '',
             'rpchost': DCR_RPC_HOST,
             'rpcport': DCR_RPC_PORT + port_offset,
             'walletrpchost': DCR_WALLET_RPC_HOST,

bin/basicswap_run.py

@@ -40,7 +40,7 @@ class Daemon:
 
 
 def is_known_coin(coin_name: str) -> bool:
-    for k, v in chainparams:
+    for k, v in chainparams.items():
         if coin_name == v['name']:
             return True
     return False
@@ -169,7 +169,11 @@ def runClient(fp, data_dir, chain, start_only_coins):
     pids_path = os.path.join(data_dir, '.pids')
 
     if os.getenv('WALLET_ENCRYPTION_PWD', '') != '':
-        raise ValueError('Please unset the WALLET_ENCRYPTION_PWD environment variable.')
+        if 'decred' in start_only_coins:
+            # Workaround for dcrwallet requiring password for initial startup
+            logger.warning('Allowing set WALLET_ENCRYPTION_PWD var with --startonlycoin=decred.')
+        else:
+            raise ValueError('Please unset the WALLET_ENCRYPTION_PWD environment variable.')
 
     if not os.path.exists(settings_path):
         raise ValueError('Settings file not found: ' + str(settings_path))
@@ -255,7 +259,11 @@ def runClient(fp, data_dir, chain, start_only_coins):
                     filename = 'dcrwallet' + ('.exe' if os.name == 'nt' else '')
 
                     wallet_pwd = v['wallet_pwd']
-                    extra_opts.append(f'--pass="{wallet_pwd}"')
+                    if wallet_pwd == '':
+                        # Only set when in startonlycoin mode
+                        wallet_pwd = os.getenv('WALLET_ENCRYPTION_PWD', '')
+                    if wallet_pwd != '':
+                        extra_opts.append(f'--pass="{wallet_pwd}"')
                     extra_config = {'add_datadir': False, 'stdout_to_file': True, 'stdout_filename': 'dcrwallet_stdout.log'}
                     daemons.append(startDaemon(appdata, v['bindir'], filename, opts=extra_opts, extra_config=extra_config))
                     pid = daemons[-1].handle.pid

tests/basicswap/extended/test_dcr.py

@@ -594,6 +594,7 @@ class Test(BaseTest):
             'rpcpassword': 'test_pass' + str(node_id),
             'datadir': os.path.join(datadir, 'dcr_' + str(node_id)),
             'bindir': DCR_BINDIR,
+            'wallet_pwd': 'test_pass',
             'use_csv': True,
             'use_segwit': True,
             'blocks_confirmed': 1,
@@ -942,8 +943,41 @@ class Test(BaseTest):
         amount_proved = ci0.verifyProofOfFunds(funds_proof[0], funds_proof[1], funds_proof[2], 'test'.encode('utf-8'))
         assert (amount_proved >= require_amount)
 
+    def test_009_wallet_encryption(self):
+        logging.info('---------- Test {} wallet encryption'.format(self.test_coin.name))
+
+        for coin in ('part', 'dcr', 'xmr'):
+            jsw = read_json_api(1800, f'wallets/{coin}')
+            assert (jsw['encrypted'] is (True if coin == 'dcr' else False))
+            assert (jsw['locked'] is False)
+
+        read_json_api(1800, 'setpassword', {'oldpassword': '', 'newpassword': 'notapassword123'})
+
+        # Entire system is locked with Particl wallet
+        jsw = read_json_api(1800, 'wallets/dcr')
+        assert ('Coin must be unlocked' in jsw['error'])
+
+        read_json_api(1800, 'unlock', {'coin': 'part', 'password': 'notapassword123'})
+
+        for coin in ('dcr', 'xmr'):
+            jsw = read_json_api(1800, f'wallets/{coin}')
+            assert (jsw['encrypted'] is True)
+            assert (jsw['locked'] is True)
+
+        read_json_api(1800, 'lock', {'coin': 'part'})
+        jsw = read_json_api(1800, 'wallets/part')
+        assert ('Coin must be unlocked' in jsw['error'])
+
+        read_json_api(1800, 'setpassword', {'oldpassword': 'notapassword123', 'newpassword': 'notapassword456'})
+        read_json_api(1800, 'unlock', {'password': 'notapassword456'})
+
+        for coin in ('part', 'dcr', 'xmr'):
+            jsw = read_json_api(1800, f'wallets/{coin}')
+            assert (jsw['encrypted'] is True)
+            assert (jsw['locked'] is False)
+
     def test_010_txn_size(self):
-        logging.info('---------- Test {} txn_size'.format(self.test_coin.name))
+        logging.info('---------- Test {} txn size'.format(self.test_coin.name))
 
         swap_clients = self.swap_clients
         ci = swap_clients[0].ci(self.test_coin)

tests/basicswap/extended/test_xmr_persistent.py

@@ -250,9 +250,10 @@ class Test(unittest.TestCase):
             self.update_thread_dcr = threading.Thread(target=updateThreadDCR, args=(self,))
             self.update_thread_dcr.start()
 
-        # Lower output split threshold for more stakeable outputs
+        if RESET_TEST:
-        for i in range(NUM_NODES):
+            # Lower output split threshold for more stakeable outputs
-            callpartrpc(i, 'walletsettings', ['stakingoptions', {'stakecombinethreshold': 100, 'stakesplitthreshold': 200}])
+            for i in range(NUM_NODES):
+                callpartrpc(i, 'walletsettings', ['stakingoptions', {'stakecombinethreshold': 100, 'stakesplitthreshold': 200}])
         self.update_thread = threading.Thread(target=updateThread, args=(self,))
         self.update_thread.start()