Test that keys from inactive seeds are generated

test/functional/wallet_hd.py

@@ -170,5 +170,101 @@ class WalletHDTest(BitcoinTestFramework):
             assert_raises_rpc_error(-5, "Already have this key", self.nodes[1].sethdseed, False, new_seed)
             assert_raises_rpc_error(-5, "Already have this key", self.nodes[1].sethdseed, False, self.nodes[1].dumpprivkey(self.nodes[1].getnewaddress()))
 
+            self.log.info('Test sethdseed restoring with keys outside of the initial keypool')
+            self.nodes[0].generate(10)
+            # Restart node 1 with keypool of 3 and a different wallet
+            self.nodes[1].createwallet(wallet_name='origin', blank=True)
+            self.stop_node(1)
+            self.start_node(1, extra_args=['-keypool=3', '-wallet=origin'])
+            connect_nodes(self.nodes[0], 1)
+
+            # sethdseed restoring and seeing txs to addresses out of the keypool
+            origin_rpc = self.nodes[1].get_wallet_rpc('origin')
+            seed = self.nodes[0].dumpprivkey(self.nodes[0].getnewaddress())
+            origin_rpc.sethdseed(True, seed)
+
+            self.nodes[1].createwallet(wallet_name='restore', blank=True)
+            restore_rpc = self.nodes[1].get_wallet_rpc('restore')
+            restore_rpc.sethdseed(True, seed) # Set to be the same seed as origin_rpc
+            restore_rpc.sethdseed(True) # Rotate to a new seed, making original `seed` inactive
+
+            self.nodes[1].createwallet(wallet_name='restore2', blank=True)
+            restore2_rpc = self.nodes[1].get_wallet_rpc('restore2')
+            restore2_rpc.sethdseed(True, seed) # Set to be the same seed as origin_rpc
+            restore2_rpc.sethdseed(True) # Rotate to a new seed, making original `seed` inactive
+
+            # Check persistence of inactive seed by reloading restore. restore2 is still loaded to test the case where the wallet is not reloaded
+            restore_rpc.unloadwallet()
+            self.nodes[1].loadwallet('restore')
+            restore_rpc = self.nodes[1].get_wallet_rpc('restore')
+
+            # Empty origin keypool and get an address that is beyond the initial keypool
+            origin_rpc.getnewaddress()
+            origin_rpc.getnewaddress()
+            last_addr = origin_rpc.getnewaddress() # Last address of initial keypool
+            addr = origin_rpc.getnewaddress() # First address beyond initial keypool
+
+            # Check that the restored seed has last_addr but does not have addr
+            info = restore_rpc.getaddressinfo(last_addr)
+            assert_equal(info['ismine'], True)
+            info = restore_rpc.getaddressinfo(addr)
+            assert_equal(info['ismine'], False)
+            info = restore2_rpc.getaddressinfo(last_addr)
+            assert_equal(info['ismine'], True)
+            info = restore2_rpc.getaddressinfo(addr)
+            assert_equal(info['ismine'], False)
+            # Check that the origin seed has addr
+            info = origin_rpc.getaddressinfo(addr)
+            assert_equal(info['ismine'], True)
+
+            # Send a transaction to addr, which is out of the initial keypool.
+            # The wallet that has set a new seed (restore_rpc) should not detect this transaction.
+            txid = self.nodes[0].sendtoaddress(addr, 1)
+            origin_rpc.sendrawtransaction(self.nodes[0].gettransaction(txid)['hex'])
+            self.nodes[0].generate(1)
+            origin_rpc.gettransaction(txid)
+            assert_raises_rpc_error(-5, 'Invalid or non-wallet transaction id', restore_rpc.gettransaction, txid)
+            out_of_kp_txid = txid
+
+            # Send a transaction to last_addr, which is in the initial keypool.
+            # The wallet that has set a new seed (restore_rpc) should detect this transaction and generate 3 new keys from the initial seed.
+            # The previous transaction (out_of_kp_txid) should still not be detected as a rescan is required.
+            txid = self.nodes[0].sendtoaddress(last_addr, 1)
+            origin_rpc.sendrawtransaction(self.nodes[0].gettransaction(txid)['hex'])
+            self.nodes[0].generate(1)
+            origin_rpc.gettransaction(txid)
+            restore_rpc.gettransaction(txid)
+            assert_raises_rpc_error(-5, 'Invalid or non-wallet transaction id', restore_rpc.gettransaction, out_of_kp_txid)
+            restore2_rpc.gettransaction(txid)
+            assert_raises_rpc_error(-5, 'Invalid or non-wallet transaction id', restore2_rpc.gettransaction, out_of_kp_txid)
+
+            # After rescanning, restore_rpc should now see out_of_kp_txid and generate an additional key.
+            # addr should now be part of restore_rpc and be ismine
+            restore_rpc.rescanblockchain()
+            restore_rpc.gettransaction(out_of_kp_txid)
+            info = restore_rpc.getaddressinfo(addr)
+            assert_equal(info['ismine'], True)
+            restore2_rpc.rescanblockchain()
+            restore2_rpc.gettransaction(out_of_kp_txid)
+            info = restore2_rpc.getaddressinfo(addr)
+            assert_equal(info['ismine'], True)
+
+            # Check again that 3 keys were derived.
+            # Empty keypool and get an address that is beyond the initial keypool
+            origin_rpc.getnewaddress()
+            origin_rpc.getnewaddress()
+            last_addr = origin_rpc.getnewaddress()
+            addr = origin_rpc.getnewaddress()
+
+            # Check that the restored seed has last_addr but does not have addr
+            info = restore_rpc.getaddressinfo(last_addr)
+            assert_equal(info['ismine'], True)
+            info = restore_rpc.getaddressinfo(addr)
+            assert_equal(info['ismine'], False)
+            info = restore2_rpc.getaddressinfo(last_addr)
+            assert_equal(info['ismine'], True)
+            info = restore2_rpc.getaddressinfo(addr)
+            assert_equal(info['ismine'], False)
+
 if __name__ == '__main__':
     WalletHDTest().main ()