mmgen-wallet/test/test_py_d/ts_xmrwallet.py

#!/usr/bin/env python3
#
# mmgen = Multi-Mode GENerator, command-line Bitcoin cold storage solution
# Copyright (C)2013-2023 The MMGen Project <mmgen@tuta.io>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

"""
test.test_py_d.ts_xmrwallet: xmrwallet tests for the test.py test suite
"""

import sys,os,atexit,asyncio,shutil
from subprocess import run,PIPE

from mmgen.cfg import gc
from mmgen.obj import MMGenRange
from mmgen.amt import XMRAmt
from mmgen.addrlist import KeyAddrList,AddrIdxList
from ..include.common import *
from .common import *

from .ts_base import *

class TestSuiteXMRWallet(TestSuiteBase):
	"""
	Monero wallet operations
	"""

	networks = ('xmr',)
	passthru_opts = ()
	tmpdir_nums = [29]
	dfl_random_txs = 3
	color = True
	socks_port = 49237
	user_data = (
		('miner', '98831F3A', 130, '1-2', []),
		('bob',   '1378FC64', 140, None,  ['--restricted-rpc']),
		('alice', 'FE3C6545', 150, '1-4', []),
	)

	cmd_group = (
		('daemon_version',            'checking daemon version'),
		('gen_kafiles',               'generating key-address files'),
		('create_wallets_miner',      'creating Monero wallets (Miner)'),
		('set_label_miner',           'setting an address label (Miner, primary account)'),
		('mine_initial_coins',        'mining initial coins'),
		('create_wallets_alice',      'creating Monero wallets (Alice)'),
		('fund_alice',                'sending funds'),

		('sync_wallets_all',          'syncing all wallets'),
		('new_account_alice',         'creating a new account (Alice)'),
		('new_account_alice_label',   'creating a new account (Alice, with label)'),
		('new_address_alice',         'creating a new address (Alice)'),
		('new_address_alice_label',   'creating a new address (Alice, with label)'),
		('remove_label_alice',        'removing an address label (Alice, subaddress)'),
		('set_label_alice',           'setting an address label (Alice, subaddress)'),
		('sync_wallets_selected',     'syncing selected wallets'),

		('sweep_to_address_proxy',    'sweeping to new address (via TX relay + proxy)'),
		('sweep_to_account',          'sweeping to new account'),
		('sweep_to_address_noproxy',  'sweeping to new address (via TX relay, no proxy)'),
		('transfer_to_miner_proxy',   'transferring funds to Miner (via TX relay + proxy)'),
		('transfer_to_miner_noproxy', 'transferring funds to Miner (via TX relay, no proxy)'),

		('transfer_to_miner_create1', 'transferring funds to Miner (create TX)'),
		('transfer_to_miner_send1',   'transferring funds to Miner (send TX via proxy)'),
		('transfer_to_miner_create2', 'transferring funds to Miner (create TX)'),
		('transfer_to_miner_send2',   'transferring funds to Miner (send TX, no proxy)'),

		('sweep_create_and_send',     'sweeping to new account (create TX + send TX, in stages)'),
		('list_wallets_all',          'listing wallets'),
	)

	def __init__(self,trunner,cfgs,spawn):
		TestSuiteBase.__init__(self,trunner,cfgs,spawn)
		if trunner == None:
			return

		from mmgen.protocol import init_proto
		self.proto = init_proto( cfg, 'XMR', network='mainnet' )
		self.datadir_base  = os.path.join('test','daemons','xmrtest')
		self.extra_opts = ['--wallet-rpc-password=passw0rd']
		self.init_users()
		self.init_daemon_args()

		for v in self.users.values():
			run(['mkdir','-p',v.udir])

		self.init_proxy()

		self.tx_relay_daemon_parm = 'localhost:{}'.format( self.users['bob'].md.rpc_port )
		self.tx_relay_daemon_proxy_parm = (
			self.tx_relay_daemon_parm + f':127.0.0.1:{self.socks_port}' ) # must be IP, not 'localhost'

		if not cfg.no_daemon_stop:
			atexit.register(self.stop_daemons)
			atexit.register(self.stop_miner_wallet_daemon)

		if not cfg.no_daemon_autostart:
			self.stop_daemons()
			shutil.rmtree(self.datadir_base,ignore_errors=True)
			os.makedirs(self.datadir_base)
			self.start_daemons()

		self.balance = None

	# init methods

	@classmethod
	def init_proxy(cls,external_call=False):

		def port_in_use(port):
			import socket
			try: socket.create_connection(('localhost',port)).close()
			except: return False
			else: return True

		def start_proxy():
			if external_call or not cfg.no_daemon_autostart:
				run(a+b2)
				omsg(f'SSH SOCKS server started, listening at localhost:{cls.socks_port}')

		def kill_proxy():
			if gc.platform == 'linux':
				omsg(f'Killing SSH SOCKS server at localhost:{cls.socks_port}')
				cmd = [ 'pkill', '-f', ' '.join(a + b2) ]
				run(cmd)

		a = ['ssh','-x','-o','ExitOnForwardFailure=True','-D',f'localhost:{cls.socks_port}']
		b0 = ['-o','PasswordAuthentication=False']
		b1 = ['localhost','true']
		b2 = ['-fN','-E','txrelay-proxy.debug','localhost']

		if port_in_use(cls.socks_port):
			omsg(f'Port {cls.socks_port} already in use.  Assuming SSH SOCKS server is running')
		else:
			cp = run(a+b0+b1,stdout=PIPE,stderr=PIPE)
			err = cp.stderr.decode()
			if err:
				omsg(err)

			if cp.returncode == 0:
				start_proxy()
			elif 'onnection refused' in err:
				die(2,fmt("""
					The SSH daemon must be running and listening on localhost in order to test
					XMR TX relaying via SOCKS proxy.  If sshd is not running, please start it.
					Otherwise, add the line 'ListenAddress 127.0.0.1' to your sshd_config, and
					then restart the daemon.
				""",indent='    '))
			elif 'ermission denied' in err:
				msg(fmt(f"""
					In order to test XMR TX relaying via SOCKS proxy, it’s desirable to enable
					SSH to localhost without a password, which is not currently supported by
					your configuration.  Your possible courses of action:

					1. Continue by answering 'y' at this prompt, and enter your system password
					   at the following prompt;

					2. Exit the test here, add your user SSH public key to your user
					   'authorized_keys' file, and restart the test; or

					3. Exit the test here, start the SSH SOCKS proxy manually by entering the
					   following command, and restart the test:

					      {' '.join(a+b2)}
				""",indent='    ',strip_char='\t'))

				from mmgen.ui import keypress_confirm
				if keypress_confirm(cfg,'Continue?'):
					start_proxy()
				else:
					die(1,'Exiting at user request')
			else:
				die(2,fmt(f"""
					Please start the SSH SOCKS proxy by entering the following command:

						{' '.join(a+b2)}

					Then restart the test.
				""",indent='    '))

		if not (external_call or cfg.no_daemon_stop):
			atexit.register(kill_proxy)

		return True

	def init_users(self):
		from mmgen.daemon import CoinDaemon
		from mmgen.proto.xmr.daemon import MoneroWalletDaemon
		from mmgen.proto.xmr.rpc import MoneroRPCClient,MoneroWalletRPCClient
		self.users = {}
		tmpdir_num = self.tmpdir_nums[0]
		ud = namedtuple('user_data',[
			'sid',
			'mmwords',
			'udir',
			'datadir',
			'kal_range',
			'kafile',
			'walletfile_fs',
			'addrfile_fs',
			'md',
			'md_rpc',
			'wd',
			'wd_rpc',
			'add_coind_args',
		])
		# kal_range must be None, a single digit, or a single hyphenated range
		for (   user,
				sid,
				shift,
				kal_range,
				add_coind_args ) in self.user_data:
			tmpdir = os.path.join('test','tmp',str(tmpdir_num))
			udir = os.path.join(tmpdir,user)
			datadir = os.path.join(self.datadir_base,user)
			md = CoinDaemon(
				cfg        = cfg,
				proto      = self.proto,
				test_suite = True,
				port_shift = shift,
				opts       = ['online'],
				datadir    = datadir
			)
			md_rpc = MoneroRPCClient(
				cfg    = cfg,
				proto  = self.proto,
				host   = md.host,
				port   = md.rpc_port,
				user   = None,
				passwd = None,
				test_connection = False,
				daemon = md,
			)
			wd = MoneroWalletDaemon(
				cfg        = cfg,
				proto      = self.proto,
				test_suite = True,
				wallet_dir = udir,
				user       = 'foo',
				passwd     = 'bar',
				port_shift = shift,
				datadir    = os.path.join('test','daemons'),
				daemon_addr = f'127.0.0.1:{md.rpc_port}',
			)
			wd_rpc = MoneroWalletRPCClient(
				cfg             = cfg,
				daemon          = wd,
				test_connection = False,
			)
			self.users[user] = ud(
				sid           = sid,
				mmwords       = f'test/ref/{sid}.mmwords',
				udir          = udir,
				datadir       = datadir,
				kal_range     = kal_range,
				kafile        = f'{udir}/{sid}-XMR-M[{kal_range}].akeys',
				walletfile_fs = f'{udir}/{sid}-{{}}-MoneroWallet',
				addrfile_fs   = f'{udir}/{sid}-{{}}-MoneroWallet.address.txt',
				md            = md,
				md_rpc        = md_rpc,
				wd            = wd,
				wd_rpc        = wd_rpc,
				add_coind_args = add_coind_args,
			)

	def init_daemon_args(self):
		common_args = ['--p2p-bind-ip=127.0.0.1','--fixed-difficulty=1','--regtest'] # ,'--rpc-ssl-allow-any-cert']
		for u in self.users:
			other_ports = [self.users[u2].md.p2p_port for u2 in self.users if u2 != u]
			node_args = [f'--add-exclusive-node=127.0.0.1:{p}' for p in other_ports]
			self.users[u].md.usr_coind_args = (
				common_args +
				node_args +
				self.users[u].add_coind_args )

	# cmd_group methods

	def daemon_version(self):
		rpc_port = self.users['miner'].md.rpc_port
		return self.spawn( 'mmgen-tool', ['--coin=xmr', f'--rpc-port={rpc_port}', 'daemon_version'] )

	def gen_kafiles(self):
		for user,data in self.users.items():
			if not data.kal_range:
				continue
			run(['mkdir','-p',data.udir])
			run(f'rm -f {data.kafile}',shell=True)
			t = self.spawn(
				'mmgen-keygen', [
					'-q', '--accept-defaults', '--coin=xmr',
					f'--outdir={data.udir}', data.mmwords, data.kal_range
				],
				extra_desc = f'({capfirst(user)})' )
			t.read()
			t.ok()
		t.skip_ok = True
		return t

	def create_wallets_miner(self): return self.create_wallets('miner')
	def create_wallets_alice(self): return self.create_wallets('alice')

	def create_wallets(self,user,wallet=None,add_opts=[]):
		assert wallet is None or is_int(wallet), 'wallet arg'
		data = self.users[user]
		stem_glob = data.walletfile_fs.format(wallet or '*')
		for glob in (
				stem_glob,
				stem_glob + '.keys',
				stem_glob + '.address.txt' ):
#			imsg(f'rm -f {glob}')
			run( f'rm -f {glob}', shell=True )
		t = self.spawn(
			'mmgen-xmrwallet',
			[f'--wallet-dir={data.udir}']
			+ self.extra_opts
			+ add_opts
			+ ['create']
			+ [data.kafile]
			+ [wallet or data.kal_range]
		)
		for i in MMGenRange(wallet or data.kal_range).items:
			write_data_to_file(
				cfg,
				self.users[user].addrfile_fs.format(i),
				t.expect_getend('Address: '),
				quiet = True
			)
		return t

	def new_addr_alice(self,spec,cfg,expect):
		data = self.users['alice']
		t = self.spawn(
			'mmgen-xmrwallet',
			self.extra_opts +
			[f'--wallet-dir={data.udir}'] +
			[f'--daemon=localhost:{data.md.rpc_port}'] +
			(['--no-start-wallet-daemon'] if cfg in ('continue','stop') else []) +
			(['--no-stop-wallet-daemon'] if cfg in ('start','continue') else []) +
			[ 'new', data.kafile, spec ] )
		res = strip_ansi_escapes(t.read()).replace('\r','')
		m = re.search(expect,res,re.DOTALL)
		assert m, f'no match found for {expect!r}'
		return t

	na_idx = 1

	def new_account_alice(self):
		return self.new_addr_alice(
			'4',
			'start',
			fr'Creating new account.*Index:\s+{self.na_idx}\s')

	def new_account_alice_label(self):
		return self.new_addr_alice(
			'4,Alice’s new account',
			'continue',
			fr'Creating new account.*Index:\s+{self.na_idx+1}\s.*Alice’s new account')

	def new_address_alice(self):
		return self.new_addr_alice(
			'4:2',
			'continue',
			fr'Account index:\s+2\s+Creating new address' )

	def new_address_alice_label(self):
		return self.new_addr_alice(
			'4:2,Alice’s new address',
			'stop',
			fr'Account index:\s+2\s+Creating new address.*Alice’s new address' )

	async def mine_initial_coins(self):
		await self.open_wallet_user('miner',1)
		return await self.mine_chk('miner',1,0,lambda x: x > 20,'unlocked balance > 20')

	async def fund_alice(self):
		await self.transfer(
			'miner',
			1234567891234,
			read_from_file(self.users['alice'].addrfile_fs.format(1)),
		)
		bal = '1.234567891234'
		return await self.mine_chk(
			'alice',1,0,
			lambda x: str(x) == bal,f'unlocked balance == {bal}',
			random_txs = self.dfl_random_txs
		)

	def set_label_miner(self):
		return self.set_label_user( 'miner', '1:0:0,"Miner’s new primary account label [1:0:0]"' )

	def remove_label_alice(self):
		return self.set_label_user( 'alice', '4:2:2,""' )

	def set_label_alice(self):
		return self.set_label_user( 'alice', '4:2:2,"Alice’s new subaddress label [4:2:2]"' )

	def set_label_user(self,user,label_spec):
		data = self.users[user]
		cmd_opts = [f'--wallet-dir={data.udir}', f'--daemon=localhost:{data.md.rpc_port}']
		t = self.spawn(
			'mmgen-xmrwallet',
			self.extra_opts + cmd_opts + ['label', data.kafile, label_spec]
		)
		t.expect('(y/N): ','y')
		t.expect(['successfully set','successfully removed'])
		return t

	def sync_wallets_all(self):
		return self.sync_wallets('alice',add_opts=['--rescan-blockchain'])

	def sync_wallets_selected(self):
		return self.sync_wallets('alice',wallets='1-2,4')

	def list_wallets_all(self):
		return self.sync_wallets('alice',op='list')

	def sync_wallets(self,user,op='sync',wallets=None,add_opts=[]):
		data = self.users[user]
		cmd_opts = list_gen(
			[f'--wallet-dir={data.udir}'],
			[f'--daemon=localhost:{data.md.rpc_port}'],
		)
		t = self.spawn(
			'mmgen-xmrwallet',
			self.extra_opts
			+ cmd_opts
			+ add_opts
			+ [op]
			+ [data.kafile]
			+ ([wallets] if wallets else [])
		)
		wlist = AddrIdxList(wallets) if wallets else MMGenRange(data.kal_range).items
		for n,wnum in enumerate(wlist):
			t.expect('Syncing wallet {}/{} ({})'.format(
				n+1,
				len(wlist),
				os.path.basename(data.walletfile_fs.format(wnum)),
			))
			t.expect('Chain height: ')
			t.expect('Wallet height: ')
			t.expect('Balance: ')
		return t

	def do_op(self, op, user, arg2,
			tx_relay_parm = None,
			no_relay      = False,
			return_amt    = False,
			reuse_acct    = False,
			add_desc      = None,
			do_ret        = False ):

		data = self.users[user]
		cmd_opts = list_gen(
			[f'--wallet-dir={data.udir}'],
			[f'--outdir={data.udir}'],
			[f'--daemon=localhost:{data.md.rpc_port}'],
			[f'--tx-relay-daemon={tx_relay_parm}', tx_relay_parm],
			['--no-relay', no_relay]
		)
		add_desc = (', ' + add_desc) if add_desc else ''

		t = self.spawn(
			'mmgen-xmrwallet',
			self.extra_opts
			+ cmd_opts
			+ [op]
			+ [data.kafile]
			+ [arg2],
			extra_desc = f'({capfirst(user)}{add_desc})' )

		if op == 'sweep':
			t.expect(
				r'Create new {} .* \(y/N\): '.format(('address','account')[',' in arg2]),
				('y','n')[reuse_acct],
				regex=True )
			if reuse_acct:
				t.expect( r'to last existing account .* \(y/N\): ','y', regex=True )

		if return_amt:
			amt = XMRAmt(strip_ansi_escapes(t.expect_getend('Amount: ')).replace('XMR','').strip())

		dtype = 'signed'
		t.expect(f'Save {dtype} transaction? (y/N): ','y')
		t.written_to_file(f'{dtype.capitalize()} transaction')

		if not no_relay:
			t.expect(f'Relay {op} transaction? (y/N): ','y')
			get_file_with_ext(self.users[user].udir,'sigtx',delete_all=True)

		t.read()

		return t if do_ret else amt if return_amt else t.ok()

	def sweep_to_address_proxy(self):
		self.do_op('sweep','alice','1:0',self.tx_relay_daemon_proxy_parm)
		return self.mine_chk('alice',1,0,lambda x: x > 1,'unlocked balance > 1')

	def sweep_to_account(self):
		self.do_op('sweep','alice','1:0,2')
		return self.mine_chk('alice',2,1,lambda x: x > 1,'unlocked balance > 1')

	def sweep_to_address_noproxy(self):
		self.do_op('sweep','alice','2:1',self.tx_relay_daemon_parm)
		return self.mine_chk('alice',2,1,lambda x: x > 0.9,'unlocked balance > 0.9')

	async def transfer_to_miner_proxy(self):
		addr = read_from_file(self.users['miner'].addrfile_fs.format(2))
		amt = '0.135'
		self.do_op('transfer','alice',f'2:1:{addr},{amt}',self.tx_relay_daemon_proxy_parm)
		await self.stop_wallet_user('miner')
		await self.open_wallet_user('miner',2)
		await self.mine_chk('miner',2,0,lambda x: str(x) == amt,f'unlocked balance == {amt}')
		ok()
		return await self.mine_chk('alice',2,1,lambda x: x > 0.9,'unlocked balance > 0.9')

	async def transfer_to_miner_noproxy(self):
		addr = read_from_file(self.users['miner'].addrfile_fs.format(2))
		self.do_op('transfer','alice',f'2:1:{addr},0.0995',self.tx_relay_daemon_parm)
		await self.mine_chk('miner',2,0,lambda x: str(x) == '0.2345','unlocked balance == 0.2345')
		ok()
		return await self.mine_chk('alice',2,1,lambda x: x > 0.9,'unlocked balance > 0.9')

	def transfer_to_miner_create(self,amt):
		get_file_with_ext(self.users['alice'].udir,'sigtx',delete_all=True)
		addr = read_from_file(self.users['miner'].addrfile_fs.format(2))
		return self.do_op('transfer','alice',f'2:1:{addr},{amt}',no_relay=True,do_ret=True)

	def transfer_to_miner_create1(self):
		return self.transfer_to_miner_create('0.0111')

	def transfer_to_miner_create2(self):
		return self.transfer_to_miner_create('0.0012')

	def relay_tx(self,relay_opt,add_desc=None):
		user = 'alice'
		data = self.users[user]
		add_desc = (', ' + add_desc) if add_desc else ''
		t = self.spawn(
			'mmgen-xmrwallet',
			self.extra_opts
			+ [ relay_opt, 'relay', get_file_with_ext(data.udir,'sigtx') ],
			extra_desc = f'(relaying TX, {capfirst(user)}{add_desc})' )
		t.expect('Relay transaction? ','y')
		t.read()
		t.ok()
		return t

	async def transfer_to_miner_send1(self):
		self.relay_tx(f'--tx-relay-daemon={self.tx_relay_daemon_proxy_parm}',add_desc='via proxy')
		await self.mine_chk('miner',2,0,lambda x: str(x) == '0.2456','unlocked balance == 0.2456')
		ok()
		return await self.mine_chk('alice',2,1,lambda x: x > 0.9,'unlocked balance > 0.9')

	async def transfer_to_miner_send2(self):
		self.relay_tx(f'--tx-relay-daemon={self.tx_relay_daemon_parm}',add_desc='no proxy')
		await self.mine_chk('miner',2,0,lambda x: str(x) == '0.2468','unlocked balance == 0.2468')
		ok()
		return await self.mine_chk('alice',2,1,lambda x: x > 0.9,'unlocked balance > 0.9')

	async def sweep_create_and_send(self):
		bal = XMRAmt('0')
		min_bal = XMRAmt('0.9')

		for i in range(4):
			if i: ok()
			get_file_with_ext(self.users['alice'].udir,'sigtx',delete_all=True)
			send_amt = self.do_op(
				'sweep','alice','2:1,3', # '2:1,3'
				no_relay     = True,
				reuse_acct   = True,
				add_desc     = f'TX #{i+1}',
				return_amt   = True )
			ok()
			self.relay_tx(f'--tx-relay-daemon={self.tx_relay_daemon_parm}',add_desc=f'send amt: {send_amt} XMR')
			await self.mine_chk('alice',2,1,lambda x: 'chk_bal_chg','balance has changed')
			ok()
			bal += await self.mine_chk('alice',3,0,lambda x,y=bal: x > y, f'bal > {bal}',return_amt=True)
			if bal >= min_bal:
				return 'ok'

		return False

	# wallet methods

	async def open_wallet_user(self,user,wnum):
		data = self.users[user]
		silence()
		kal = KeyAddrList(
			cfg      = cfg,
			proto    = self.proto,
			addrfile = data.kafile,
			key_address_validity_check = False )
		end_silence()
		self.users[user].wd.start(silent=not (cfg.exact_output or cfg.verbose))
		return data.wd_rpc.call(
			'open_wallet',
			filename = os.path.basename(data.walletfile_fs.format(wnum)),
			password = kal.entry(wnum).wallet_passwd )

	async def stop_wallet_user(self,user):
		await self.users[user].wd_rpc.stop_daemon(silent=not (cfg.exact_output or cfg.verbose))
		return 'ok'

	# mining methods

	async def mine5(self):
		return await self.mine(5)

	async def mine10(self):
		return await self.mine(10)

	async def mine60(self):
		return await self.mine(60)

	async def mine(self,nsecs):
		imsg_r(f'Mining for {nsecs} seconds...')
		await self.start_mining()
		await asyncio.sleep(nsecs)
		ret = await self.stop_mining()
		imsg('done')
		return ret

	async def start_mining(self):
		data = self.users['miner']
		addr = read_from_file(data.addrfile_fs.format(1)) # mine to wallet #1, account 0

		for i in range(20):
			ret = data.md_rpc.call_raw(
				'start_mining',
				do_background_mining = False, # run mining in background or foreground
				ignore_battery       = True,  # ignore battery state (on laptop)
				miner_address        = addr,  # account address to mine to
				threads_count        = 3 )    # number of mining threads to run
			status = self.get_status(ret)
			if status == 'OK':
				return True
			elif status == 'BUSY':
				await asyncio.sleep(5)
				omsg('Daemon busy.  Attempting to start mining...')
			else:
				die(2,f'Monerod returned status {status}')
		else:
			die(2,'Max retries exceeded')

	async def stop_mining(self):
		ret = self.users['miner'].md_rpc.call_raw('stop_mining')
		return self.get_status(ret)

	async def mine_chk(self,user,wnum,account,test,test_desc,random_txs=None,return_amt=False):
		"""
		- open destination wallet
		- optionally create and broadcast random TXs
		- start mining
		- mine until funds appear in wallet
		- stop mining
		- close wallet
		"""

		async def get_height():
			u = self.users['miner']
			for i in range(20):
				try:
					return u.md_rpc.call('get_last_block_header')['block_header']['height']
				except Exception as e:
					if 'onnection refused' in str(e):
						omsg(f'{e}\nMonerod appears to have crashed. Attempting to restart...')
						await asyncio.sleep(5)
						u.md.restart()
						await asyncio.sleep(5)
						await self.start_mining()
					else:
						raise
			else:
				die(2,'Restart attempt limit exceeded')

		async def send_random_txs():
			from mmgen.tool.api import tool_api
			t = tool_api(cfg)
			t.init_coin('XMR','mainnet')
			t.usr_randchars = 0
			imsg_r(f'Sending random transactions: ')
			for i in range(random_txs):
				await self.transfer(
					'miner',
					123456789,
					t.randpair()[1],
				)
				imsg_r(f'{i+1} ')
				oqmsg_r('+')
				await asyncio.sleep(0.5)
			imsg('')

		def print_balance(dest,ub):
			imsg('Total balance in {}’s wallet {}, account #{}: {}'.format(
				capfirst(dest.user),
				dest.wnum,
				dest.account,
				ub.hl()
			))

		async def get_balance(dest,count):
			data = self.users[dest.user]
			data.wd_rpc.call('refresh')
			if count and not count % 20:
				data.wd_rpc.call('rescan_blockchain')
			ret = data.wd_rpc.call('get_accounts')
			return XMRAmt(ret['subaddress_accounts'][dest.account]['unlocked_balance'],from_unit='atomic')

		# start execution:

		self.do_msg(extra_desc =
			(f'sending {random_txs} random TXs, ' if random_txs else '') +
			f'mining, checking wallet {user}:{wnum}:{account}' )

		dest = namedtuple(
			'dest_info',['user','wnum','account','test','test_desc'])(user,wnum,account,test,test_desc)

		if dest.user != 'miner':
			await self.open_wallet_user(dest.user,dest.wnum)

		ub_start = await get_balance(dest,0)
		chk_bal_chg = dest.test(ub_start) == 'chk_bal_chg'

		if random_txs:
			await send_random_txs()

		await self.start_mining()

		h = await get_height()
		imsg_r(f'Chain height: {h} ')

		for count in range(500):
			ub = await get_balance(dest,count)
			if h > 300 and (dest.test(ub) is True or ( chk_bal_chg and ub != ub_start )):
				imsg('')
				oqmsg_r('+')
				print_balance(dest,ub)
				break
			await asyncio.sleep(2)
			h = await get_height()
			imsg_r(f'{h} ')
			oqmsg_r('+')
		else:
			die(2,'Timeout exceeded, balance {ub!r}')

		await self.stop_mining()

		if user != 'miner':
			await self.stop_wallet_user(dest.user)

		return ub if return_amt else 'ok'

	# util methods

	def get_status(self,ret):
		if ret['status'] != 'OK':
			imsg( 'RPC status: {}'.format( ret['status'] ))
		return ret['status']

	def do_msg(self,extra_desc=None):
		self.spawn(
			'',
			msg_only = True,
			extra_desc = f'({extra_desc})' if extra_desc else None
		)

	async def transfer(self,user,amt,addr):
		return self.users[user].wd_rpc.call('transfer',destinations=[{'amount':amt,'address':addr}])

	# daemon start/stop methods

	def start_daemons(self):
		for v in self.users.values():
			run(['mkdir','-p',v.datadir])
			v.md.start()

	def stop_daemons(self):
		for v in self.users.values():
			if '--restricted-rpc' in v.md.start_cmd:
				v.md.stop()
			else:
				async_run(v.md_rpc.stop_daemon())

	def stop_miner_wallet_daemon(self):
		async_run(self.users['miner'].wd_rpc.stop_daemon())