#!/usr/bin/env python3
# Copyright (c) 2014-2015 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.

# Exercise the wallet keypool, and interaction with wallet encryption/locking

# Add python-bitcoinrpc to module search path:

import time

from test_framework.authproxy import JSONRPCException
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import assert_equal, assert_raises_rpc_error

class KeyPoolTest(BitcoinTestFramework):

    def set_test_params(self):
        self.setup_clean_chain = True
        self.num_nodes = 1
        self.extra_args = [['-usehd=1']]

    def skip_test_if_missing_module(self):
        self.skip_if_no_wallet()

    def run_test(self):
        nodes = self.nodes
        addr_before_encrypting = nodes[0].getnewaddress()
        addr_before_encrypting_data = nodes[0].getaddressinfo(addr_before_encrypting)
        wallet_info_old = nodes[0].getwalletinfo()
        assert addr_before_encrypting_data['hdchainid'] == wallet_info_old['hdchainid']

        # Encrypt wallet and wait to terminate
        nodes[0].encryptwallet('test')
        # Keep creating keys
        addr = nodes[0].getnewaddress()
        addr_data = nodes[0].getaddressinfo(addr)
        wallet_info = nodes[0].getwalletinfo()
        assert addr_before_encrypting_data['hdchainid'] == wallet_info['hdchainid']
        assert addr_data['hdchainid'] == wallet_info['hdchainid']

        try:
            addr = nodes[0].getnewaddress()
            raise AssertionError('Keypool should be exhausted after one address')
        except JSONRPCException as e:
            assert e.error['code']==-12

        # put six (plus 2) new keys in the keypool (100% external-, +100% internal-keys, 1 in min)
        nodes[0].walletpassphrase('test', 12000)
        nodes[0].keypoolrefill(6)
        nodes[0].walletlock()
        wi = nodes[0].getwalletinfo()
        assert_equal(wi['keypoolsize_hd_internal'], 6)
        assert_equal(wi['keypoolsize'], 6)

        # drain the internal keys
        nodes[0].getrawchangeaddress()
        nodes[0].getrawchangeaddress()
        nodes[0].getrawchangeaddress()
        nodes[0].getrawchangeaddress()
        nodes[0].getrawchangeaddress()
        nodes[0].getrawchangeaddress()
        # the next one should fail
        try:
            nodes[0].getrawchangeaddress()
            raise AssertionError('Keypool should be exhausted after six addresses')
        except JSONRPCException as e:
            assert e.error['code']==-12

        addr = set()
        # drain the external keys
        addr.add(nodes[0].getnewaddress())
        addr.add(nodes[0].getnewaddress())
        addr.add(nodes[0].getnewaddress())
        addr.add(nodes[0].getnewaddress())
        addr.add(nodes[0].getnewaddress())
        addr.add(nodes[0].getnewaddress())
        assert len(addr) == 6
        # the next one should fail
        try:
            addr = nodes[0].getnewaddress()
            raise AssertionError('Keypool should be exhausted after six addresses')
        except JSONRPCException as e:
            assert e.error['code']==-12

        # refill keypool with three new addresses
        nodes[0].walletpassphrase('test', 1)
        nodes[0].keypoolrefill(3)
        # test walletpassphrase timeout
        time.sleep(1.1)
        assert_equal(nodes[0].getwalletinfo()["unlocked_until"], 0)

        # drain the keypool
        for _ in range(3):
            nodes[0].getnewaddress()
        assert_raises_rpc_error(-12, "Keypool ran out", nodes[0].getnewaddress)

        nodes[0].walletpassphrase('test', 100)
        nodes[0].keypoolrefill(100)
        wi = nodes[0].getwalletinfo()
        assert_equal(wi['keypoolsize_hd_internal'], 100)
        assert_equal(wi['keypoolsize'], 100)

if __name__ == '__main__':
    KeyPoolTest().main()