1 files changed, 69 insertions, 0 deletions
diff --git a/test/functional/wallet_keypool_topup.py b/test/functional/wallet_keypool_topup.py
new file mode 100755
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+++ b/test/functional/wallet_keypool_topup.py
@@ -0,0 +1,69 @@
+#!/usr/bin/env python3
+# Copyright (c) 2017 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 HD Wallet keypool restore function.
+
+Two nodes. Node1 is under test. Node0 is providing transactions and generating blocks.
+
+- Start node1, shutdown and backup wallet.
+- Generate 110 keys (enough to drain the keypool). Store key 90 (in the initial keypool) and key 110 (beyond the initial keypool). Send funds to key 90 and key 110.
+- Stop node1, clear the datadir, move wallet file back into the datadir and restart node1.
+- connect node1 to node0. Verify that they sync and node1 receives its funds."""
+import os
+import shutil
+
+from test_framework.test_framework import BitcoinTestFramework
+from test_framework.util import (
+    assert_equal,
+    connect_nodes_bi,
+    sync_blocks,
+)
+
+
+class KeypoolRestoreTest(BitcoinTestFramework):
+    def set_test_params(self):
+        self.setup_clean_chain = True
+        self.num_nodes = 2
+        self.extra_args = [[], ['-keypool=100', '-keypoolmin=20']]
+
+    def run_test(self):
+        wallet_path = os.path.join(self.nodes[1].datadir, "regtest", "wallets", "wallet.dat")
+        wallet_backup_path = os.path.join(self.nodes[1].datadir, "wallet.bak")
+        self.nodes[0].generate(101)
+
+        self.log.info("Make backup of wallet")
+        self.stop_node(1)
+        shutil.copyfile(wallet_path, wallet_backup_path)
+        self.start_node(1, self.extra_args[1])
+        connect_nodes_bi(self.nodes, 0, 1)
+
+        self.log.info("Generate keys for wallet")
+        for _ in range(90):
+            addr_oldpool = self.nodes[1].getnewaddress()
+        for _ in range(20):
+            addr_extpool = self.nodes[1].getnewaddress()
+
+        self.log.info("Send funds to wallet")
+        self.nodes[0].sendtoaddress(addr_oldpool, 10)
+        self.nodes[0].generate(1)
+        self.nodes[0].sendtoaddress(addr_extpool, 5)
+        self.nodes[0].generate(1)
+        sync_blocks(self.nodes)
+
+        self.log.info("Restart node with wallet backup")
+        self.stop_node(1)
+        shutil.copyfile(wallet_backup_path, wallet_path)
+        self.start_node(1, self.extra_args[1])
+        connect_nodes_bi(self.nodes, 0, 1)
+        self.sync_all()
+
+        self.log.info("Verify keypool is restored and balance is correct")
+        assert_equal(self.nodes[1].getbalance(), 15)
+        assert_equal(self.nodes[1].listtransactions()[0]['category'], "receive")
+        # Check that we have marked all keys up to the used keypool key as used
+        assert_equal(self.nodes[1].getaddressinfo(self.nodes[1].getnewaddress())['hdkeypath'], "m/0'/0'/110'")
+
+
+if __name__ == '__main__':
+    KeypoolRestoreTest().main()