wallet: Avoid dropping confirmed coins

test/functional/wallet_timelock.py

@@ -0,0 +1,50 @@
+#!/usr/bin/env python3
+# Copyright (c) 2022 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+from test_framework.test_framework import BitcoinTestFramework
+from test_framework.util import assert_equal
+
+
+class WalletLocktimeTest(BitcoinTestFramework):
+    def set_test_params(self):
+        self.num_nodes = 1
+
+    def skip_test_if_missing_module(self):
+        self.skip_if_no_wallet()
+
+    def run_test(self):
+        node = self.nodes[0]
+
+        mtp_tip = node.getblockheader(node.getbestblockhash())["mediantime"]
+
+        self.log.info("Get new address with label")
+        label = "timelock⌛🔓"
+        address = node.getnewaddress(label=label)
+
+        self.log.info("Send to new address with locktime")
+        node.send(
+            outputs={address: 5},
+            options={"locktime": mtp_tip - 1},
+        )
+        self.generate(node, 1)
+
+        self.log.info("Check that clock can not change finality of confirmed txs")
+        amount_before_ad = node.getreceivedbyaddress(address)
+        amount_before_lb = node.getreceivedbylabel(label)
+        list_before_ad = node.listreceivedbyaddress(address_filter=address)
+        list_before_lb = node.listreceivedbylabel(include_empty=False)
+        balance_before = node.getbalances()["mine"]["trusted"]
+        coin_before = node.listunspent(maxconf=1)
+        node.setmocktime(mtp_tip - 1)
+        assert_equal(node.getreceivedbyaddress(address), amount_before_ad)
+        assert_equal(node.getreceivedbylabel(label), amount_before_lb)
+        assert_equal(node.listreceivedbyaddress(address_filter=address), list_before_ad)
+        assert_equal(node.listreceivedbylabel(include_empty=False), list_before_lb)
+        assert_equal(node.getbalances()["mine"]["trusted"], balance_before)
+        assert_equal(node.listunspent(maxconf=1), coin_before)
+
+
+if __name__ == "__main__":
+    WalletLocktimeTest().main()