add request_force_close command to CLI

add regtest for channel backup

electrum/commands.py

@@ -1081,6 +1081,12 @@ class Commands:
         coro = wallet.lnworker.force_close_channel(chan_id) if force else wallet.lnworker.close_channel(chan_id)
         return await coro
 
+    @command('wn')
+    async def request_force_close(self, channel_point, wallet: Abstract_Wallet = None):
+        txid, index = channel_point.split(':')
+        chan_id, _ = channel_id_from_funding_tx(txid, int(index))
+        return await wallet.lnworker.request_force_close_from_backup(chan_id)
+
     @command('w')
     async def export_channel_backup(self, channel_point, wallet: Abstract_Wallet = None):
         txid, index = channel_point.split(':')

electrum/tests/regtest.py

@@ -36,6 +36,9 @@ class TestLightning(unittest.TestCase):
 class TestLightningAB(TestLightning):
     agents = ['alice', 'bob']
 
+    def test_backup(self):
+        self.run_shell(['backup'])
+
     def test_breach(self):
         self.run_shell(['breach'])
 

electrum/tests/regtest/regtest.sh

@@ -133,6 +133,30 @@ if [[ $1 == "breach" ]]; then
 fi
 
 
+if [[ $1 == "backup" ]]; then
+    wait_for_balance alice 1
+    echo "alice opens channel"
+    bob_node=$($bob nodeid)
+    channel=$($alice open_channel $bob_node 0.15)
+    echo "channel point: $channel"
+    new_blocks 3
+    wait_until_channel_open alice
+    backup=$($alice export_channel_backup $channel)
+    request=$($bob add_lightning_request 0.01 -m "blah" | jq -r ".invoice")
+    echo "alice pays"
+    $alice lnpay $request
+    seed=$($alice getseed)
+    $alice stop
+    sleep 2 # FIXME: we should not have to do that..
+    mv /tmp/alice/regtest/wallets/default_wallet /tmp/alice/regtest/wallets/default_wallet.old
+    $alice -o restore "$seed"
+    $alice daemon -d
+    $alice load_wallet
+    $alice import_channel_backup $backup
+    $alice request_force_close $channel
+fi
+
+
 if [[ $1 == "extract_preimage" ]]; then
     # instead of settling bob will broadcast
     $bob enable_htlc_settle false