Merge #18774: test: added test for upgradewallet RPC

66fe7b1a98c03f690dcf60d359baac124658aeae test: added test for upgradewallet RPC (Harris)

Pull request description:

  This PR adds tests for the newly merged *upgradewallet* RPC.

  Additionally, it expands `test_framework/util.py` by adding the function `adjust_bitcoin_conf_for_pre_17` to support nodes that don't parse configuration sections.

  This test uses two older node versions, v0.15.2 and v0.16.3, to create older wallet versions to be used by `upgradewallet`.

  Fixes https://github.com/bitcoin/bitcoin/issues/18767

Top commit has no ACKs.

Tree-SHA512: bb72ff1e829e2c3954386cc308842820ef0828a4fbb754202b225a8748f92d4dcc5ec77fb146bfd5484a5c2f29ce95adf9f3fb4483437088ff3ea4a8d2c442c1

3 files changed, 164 insertions, 0 deletions

diff --git a/test/functional/test_framework/util.py b/test/functional/test_framework/util.py
index 64e1aa3bbc..eb9f6528b3 100644
--- a/test/functional/test_framework/util.py
+++ b/test/functional/test_framework/util.py
@@ -326,6 +326,13 @@ def initialize_datadir(dirname, n, chain):
         os.makedirs(os.path.join(datadir, 'stdout'), exist_ok=True)
     return datadir
 
+def adjust_bitcoin_conf_for_pre_17(conf_file):
+    with open(conf_file,'r', encoding='utf8') as conf:
+        conf_data = conf.read()
+    with open(conf_file, 'w', encoding='utf8') as conf:
+        conf_data_changed = conf_data.replace('[regtest]', '')
+        conf.write(conf_data_changed)
+
 def get_datadir_path(dirname, n):
     return os.path.join(dirname, "node" + str(n))
 
diff --git a/test/functional/test_runner.py b/test/functional/test_runner.py
index f50118005a..344df368a8 100755
--- a/test/functional/test_runner.py
+++ b/test/functional/test_runner.py
@@ -190,6 +190,7 @@ BASE_SCRIPTS = [
     'wallet_import_rescan.py',
     'wallet_import_with_label.py',
     'wallet_importdescriptors.py',
+    'wallet_upgradewallet.py',
     'rpc_bind.py --ipv4',
     'rpc_bind.py --ipv6',
     'rpc_bind.py --nonloopback',
diff --git a/test/functional/wallet_upgradewallet.py b/test/functional/wallet_upgradewallet.py
new file mode 100755
index 0000000000..d04bc4ce44
--- /dev/null
+++ b/test/functional/wallet_upgradewallet.py
@@ -0,0 +1,156 @@
+#!/usr/bin/env python3
+# Copyright (c) 2018-2020 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+"""upgradewallet RPC functional test
+
+Test upgradewallet RPC. Download v0.15.2 v0.16.3 node binaries:
+
+contrib/devtools/previous_release.sh -b v0.15.2 v0.16.3
+"""
+
+import os
+import shutil
+
+from test_framework.test_framework import BitcoinTestFramework, SkipTest
+from test_framework.util import (
+    adjust_bitcoin_conf_for_pre_17,
+    assert_equal,
+    assert_greater_than,
+    assert_is_hex_string
+)
+
+class UpgradeWalletTest(BitcoinTestFramework):
+    def set_test_params(self):
+        self.setup_clean_chain = True
+        self.num_nodes = 3
+        self.extra_args = [
+            ["-addresstype=bech32"], # current wallet version
+            ["-usehd=1"],            # v0.16.3 wallet
+            ["-usehd=0"]             # v0.15.2 wallet
+        ]
+
+    def skip_test_if_missing_module(self):
+        self.skip_if_no_wallet()
+
+    def setup_network(self):
+        self.setup_nodes()
+
+    def setup_nodes(self):
+        if os.getenv("TEST_PREVIOUS_RELEASES") == "false":
+            raise SkipTest("upgradewallet RPC tests")
+
+        releases_path = os.getenv("PREVIOUS_RELEASES_DIR") or os.getcwd() + "/releases"
+        if not os.path.isdir(releases_path):
+            if os.getenv("TEST_PREVIOUS_RELEASES") == "true":
+                raise AssertionError("TEST_PREVIOUS_RELEASES=1 but releases missing: " + releases_path)
+            raise SkipTest("This test requires binaries for previous releases")
+
+        self.add_nodes(self.num_nodes, extra_args=self.extra_args, versions=[
+            None,
+            160300,
+            150200
+        ], binary=[
+            self.options.bitcoind,
+            releases_path + "/v0.16.3/bin/bitcoind",
+            releases_path + "/v0.15.2/bin/bitcoind",
+        ], binary_cli=[
+            self.options.bitcoincli,
+            releases_path + "/v0.16.3/bin/bitcoin-cli",
+            releases_path + "/v0.15.2/bin/bitcoin-cli",
+        ])
+        # adapt bitcoin.conf, because older bitcoind's don't recognize config sections
+        adjust_bitcoin_conf_for_pre_17(self.nodes[1].bitcoinconf)
+        adjust_bitcoin_conf_for_pre_17(self.nodes[2].bitcoinconf)
+        self.start_nodes()
+
+    def dumb_sync_blocks(self):
+        """
+        Little helper to sync older wallets.
+        Notice that v0.15.2's regtest is hardforked, so there is
+        no sync for it.
+        v0.15.2 is only being used to test for version upgrade
+        and master hash key presence.
+        v0.16.3 is being used to test for version upgrade and balances.
+        Further info: https://github.com/bitcoin/bitcoin/pull/18774#discussion_r416967844
+        """
+        node_from = self.nodes[0]
+        v16_3_node = self.nodes[1]
+        to_height = node_from.getblockcount()
+        height = self.nodes[1].getblockcount()
+        for i in range(height, to_height+1):
+            b = node_from.getblock(blockhash=node_from.getblockhash(i), verbose=0)
+            v16_3_node.submitblock(b)
+        assert_equal(v16_3_node.getblockcount(), to_height)
+
+    def run_test(self):
+        self.nodes[0].generatetoaddress(101, self.nodes[0].getnewaddress())
+        self.dumb_sync_blocks()
+        # # Sanity check the test framework:
+        res = self.nodes[0].getblockchaininfo()
+        assert_equal(res['blocks'], 101)
+        node_master = self.nodes[0]
+        v16_3_node  = self.nodes[1]
+        v15_2_node  = self.nodes[2]
+
+        # Send coins to old wallets for later conversion checks.
+        v16_3_wallet  = v16_3_node.get_wallet_rpc('wallet.dat')
+        v16_3_address = v16_3_wallet.getnewaddress()
+        node_master.generatetoaddress(101, v16_3_address)
+        self.dumb_sync_blocks()
+        v16_3_balance = v16_3_wallet.getbalance()
+
+        self.log.info("Test upgradewallet RPC...")
+        # Prepare for copying of the older wallet
+        node_master_wallet_dir = os.path.join(node_master.datadir, "regtest/wallets")
+        v16_3_wallet       = os.path.join(v16_3_node.datadir, "regtest/wallets/wallet.dat")
+        v15_2_wallet       = os.path.join(v15_2_node.datadir, "regtest/wallet.dat")
+        self.stop_nodes()
+
+        # Copy the 0.16.3 wallet to the last Bitcoin Core version and open it:
+        shutil.rmtree(node_master_wallet_dir)
+        os.mkdir(node_master_wallet_dir)
+        shutil.copy(
+            v16_3_wallet,
+            node_master_wallet_dir
+        )
+        self.restart_node(0, ['-nowallet'])
+        node_master.loadwallet('')
+
+        wallet = node_master.get_wallet_rpc('')
+        old_version = wallet.getwalletinfo()["walletversion"]
+
+        # calling upgradewallet without version arguments
+        # should return nothing if successful
+        assert_equal(wallet.upgradewallet(), "")
+        new_version = wallet.getwalletinfo()["walletversion"]
+        # upgraded wallet version should be greater than older one
+        assert_greater_than(new_version, old_version)
+        # wallet should still contain the same balance
+        assert_equal(wallet.getbalance(), v16_3_balance)
+
+        self.stop_node(0)
+        # Copy the 0.15.2 wallet to the last Bitcoin Core version and open it:
+        shutil.rmtree(node_master_wallet_dir)
+        os.mkdir(node_master_wallet_dir)
+        shutil.copy(
+            v15_2_wallet,
+            node_master_wallet_dir
+        )
+        self.restart_node(0, ['-nowallet'])
+        node_master.loadwallet('')
+
+        wallet = node_master.get_wallet_rpc('')
+        # should have no master key hash before conversion
+        assert_equal('hdseedid' in wallet.getwalletinfo(), False)
+        # calling upgradewallet with explicit version number
+        # should return nothing if successful
+        assert_equal(wallet.upgradewallet(169900), "")
+        new_version = wallet.getwalletinfo()["walletversion"]
+        # upgraded wallet should have version 169900
+        assert_equal(new_version, 169900)
+        # after conversion master key hash should be present
+        assert_is_hex_string(wallet.getwalletinfo()['hdseedid'])
+
+if __name__ == '__main__':
+    UpgradeWalletTest().main()