[bug]: Force Channel Closures Failing to Resolve

[racarr202]

Background

Have had two channels recently force closed.

Channel was force closed after LATES had a fatal node crash.
https://lightningnetwork.plus/posts/630

My nodes logs at the time of channel closure with LATES.

2025-06-01 06:14:24.521 [INF] SRVR: Finalizing connection to 03b4b86f2301fe2b9ca478ee5980d812de2071a21a9f8f5bb49b88e29a034e1a9b@45.84.107.182:61728, inbound=true
2025-06-01 06:14:25.540 [ERR] LNWL: ChannelPoint(d80502de8177188a7f5feeadcba6ee293fe343349b5d8f644c44e8bc01e6fa18:1): sync failed: remote believes our tail height is 0, while we have 25929!
2025-06-01 06:14:25.540 [ERR] HSWC: ChannelLink(d80502de8177188a7f5feeadcba6ee293fe343349b5d8f644c44e8bc01e6fa18:1): failing link: unable to synchronize channel states: possible remote commitment state data loss with error: sync error

Also had a force closure with WilliamWallets but logs do not give any indicator regarding cause of closure.

Output from lncli pendingchannels

"pending_force_closing_channels": [
        {
            "channel": {
                "remote_node_pub": "03b4b86f2301fe2b9ca478ee5980d812de2071a21a9f8f5bb49b88e29a034e1a9b",
                "channel_point": "d80502de8177188a7f5feeadcba6ee293fe343349b5d8f644c44e8bc01e6fa18:1",
                "capacity": "10000000",
                "local_balance": "8275621",
                "remote_balance": "1723434",
                "local_chan_reserve_sat": "0",
                "remote_chan_reserve_sat": "0",
                "initiator": "INITIATOR_REMOTE",
                "commitment_type": "ANCHORS",
                "num_forwarding_packages": "0",
                "chan_status_flags": "",
                "private": false,
                "memo": "",
                "custom_channel_data": ""
            },
            "closing_txid": "3cf84740a620085b04f49981fec865978f2d980498054afc27a129e0431d6097",
            "limbo_balance": "8275951",
            "maturity_height": 0,
            "blocks_til_maturity": 0,
            "recovered_balance": "0",
            "pending_htlcs": [],
            "anchor": "LIMBO"
        },
        {
            "channel": {
                "remote_node_pub": "031553e9308e9cffd3dfbd4069fa9d561ec4c0ae6bc658c696f1137d62ff77a619",
                "channel_point": "1f580672bc1c128b9f3db927e5938fd0e8f04a028e387c0bee326545f818e833:1",
                "capacity": "10000000",
                "local_balance": "7809934",
                "remote_balance": "1957040",
                "local_chan_reserve_sat": "0",
                "remote_chan_reserve_sat": "0",
                "initiator": "INITIATOR_LOCAL",
                "commitment_type": "ANCHORS",
                "num_forwarding_packages": "0",
                "chan_status_flags": "",
                "private": false,
                "memo": "",
                "custom_channel_data": ""
            },
            "closing_txid": "66c6754c8aeb2c917b728c27513324a7fe2eadcda9076c684eb209b219105603",
            "limbo_balance": "231479",
            "maturity_height": 900249,
            "blocks_til_maturity": -8,
            "recovered_balance": "7809934",
            "pending_htlcs": [
                {
                    "incoming": false,
                    "amount": "102481",
                    "outpoint": "56a7148d1bf7152eec3fc4645f8c8e5b868e029d86959bc454db3ad74c23da8e:0",
                    "maturity_height": 900775,
                    "blocks_til_maturity": 518,
                    "stage": 2
                },
                {
                    "incoming": false,
                    "amount": "128668",
                    "outpoint": "7285e016f2b410cc7393b36ec981df87bbd0432012fbca69fd3ffab55bee34d4:0",
                    "maturity_height": 899713,
                    "blocks_til_maturity": -544,
                    "stage": 1
                }
            ],
            "anchor": "LIMBO"
        }

Output from lncli wallet pendingsweeps

{

{
    "pending_sweeps": [
        {
            "outpoint": "3cf84740a620085b04f49981fec865978f2d980498054afc27a129e0431d6097:1",
            "witness_type": "COMMITMENT_ANCHOR",
            "amount_sat": 330,
            "sat_per_vbyte": 1,
            "broadcast_attempts": 2,
            "requested_sat_per_vbyte": 0,
            "immediate": false,
            "budget": 330,
            "deadline_height": 900825,
            "next_broadcast_height": 0,
            "requested_conf_target": 0,
            "force": false
        },
        {
            "outpoint": "66c6754c8aeb2c917b728c27513324a7fe2eadcda9076c684eb209b219105603:1",
            "witness_type": "COMMITMENT_ANCHOR",
            "amount_sat": 330,
            "sat_per_vbyte": 1,
            "broadcast_attempts": 2,
            "requested_sat_per_vbyte": 0,
            "immediate": false,
            "budget": 330,
            "deadline_height": 900825,
            "next_broadcast_height": 0,
            "requested_conf_target": 0,
            "force": false
        }
    ]
}

I have another bug report which may or may not be related.
#9919

Your environment

lnd v0.18.4-beta integrated into LiT v0.14.0-alpha
Ubuntu 24.04.1 LTS (Noble Numbat)
neutrino

Expected behaviour

Funds should be available within on-chain wallet.

Actual behaviour

Funds remain unavailable.

[yyforyongyu]

Could you upgrade your node to v0.19.1, and restart it with SWPR=debug, then share some logs?

[racarr202]

I run lnd integrated with LiT so I have upgraded to LiT 0.15.0 which has lnd 0.19.1.

Here is what the sweeper has to say.

2025-06-09 11:00:10.597 [DBG] SWPR: Input 32236105caed6d30ceb6ca8967488f05db970f4dc6f656d4c76f2f2da6302ebb:0 (HtlcOfferedTimeoutSecondLevel) has CSV expiry=900776, current height is 900402, skipped sweeping
2025-06-09 11:00:10.597 [DBG] SWPR: Input 5a3859b6d3331668d29d0298831d32220bbdba7354fc8b35ff074e79eaef6eb2:0 (HtlcOfferedTimeoutSecondLevel) has CSV expiry=900919, current height is 900402, skipped sweeping
2025-06-09 11:00:10.597 [DBG] SWPR: Input 3cf84740a620085b04f49981fec865978f2d980498054afc27a129e0431d6097:3 (CommitmentTimeLock) has CSV expiry=900474, current height is 900402, skipped sweeping
2025-06-09 11:00:10.597 [DBG] SWPR: Received new block: height=900402, attempt sweeping 0 inputs:
2025-06-09 11:00:10.597 [DBG] SWPR: Sweeping 0 inputs
2025-06-09 11:00:10.597 [DBG] SWPR: Input 32236105caed6d30ceb6ca8967488f05db970f4dc6f656d4c76f2f2da6302ebb:0 (HtlcOfferedTimeoutSecondLevel) has CSV expiry=900776, current height is 900402, skipped sweeping
2025-06-09 11:00:10.597 [DBG] SWPR: Input 5a3859b6d3331668d29d0298831d32220bbdba7354fc8b35ff074e79eaef6eb2:0 (HtlcOfferedTimeoutSecondLevel) has CSV expiry=900919, current height is 900402, skipped sweeping
2025-06-09 11:00:10.597 [DBG] SWPR: Input 3cf84740a620085b04f49981fec865978f2d980498054afc27a129e0431d6097:3 (CommitmentTimeLock) has CSV expiry=900474, current height is 900402, skipped sweeping
2025-06-09 11:00:10.597 [DBG] SWPR: TxPublisher received new block: 900402

[yyforyongyu]

What about lncli wallet pendingsweeps?

[racarr202]

{
    "pending_sweeps": [
        {
            "outpoint": "32236105caed6d30ceb6ca8967488f05db970f4dc6f656d4c76f2f2da6302ebb:0",
            "witness_type": "HTLC_OFFERED_TIMEOUT_SECOND_LEVEL",
            "amount_sat": 102481,
            "sat_per_vbyte": 0,
            "broadcast_attempts": 0,
            "requested_sat_per_vbyte": 0,
            "immediate": false,
            "budget": 51241,
            "deadline_height": 901784,
            "maturity_height": 900776,
            "next_broadcast_height": 0,
            "requested_conf_target": 0,
            "force": false
        },
        {
            "outpoint": "5a3859b6d3331668d29d0298831d32220bbdba7354fc8b35ff074e79eaef6eb2:0",
            "witness_type": "HTLC_OFFERED_TIMEOUT_SECOND_LEVEL",
            "amount_sat": 128668,
            "sat_per_vbyte": 0,
            "broadcast_attempts": 0,
            "requested_sat_per_vbyte": 0,
            "immediate": false,
            "budget": 64334,
            "deadline_height": 901927,
            "maturity_height": 900919,
            "next_broadcast_height": 0,
            "requested_conf_target": 0,
            "force": false
        },
        {
            "outpoint": "3cf84740a620085b04f49981fec865978f2d980498054afc27a129e0431d6097:3",
            "witness_type": "COMMITMENT_TIME_LOCK",
            "amount_sat": 8275621,
            "sat_per_vbyte": 0,
            "broadcast_attempts": 0,
            "requested_sat_per_vbyte": 0,
            "immediate": false,
            "budget": 4137811,
            "deadline_height": 901482,
            "maturity_height": 900474,
            "next_broadcast_height": 0,
            "requested_conf_target": 0,
            "force": false
        }
    ]
}

[racarr202]

Update

After running lit with lnd.--reset-wallet-transactions argument, the maturity dates from lncli pendingchannels have also updated.

If you don't object I'll leave this issue open until they reach maturity but at this stage everything looks healthy.

"pending_force_closing_channels": [
        {
            "channel": {
                "remote_node_pub": "03b4b86f2301fe2b9ca478ee5980d812de2071a21a9f8f5bb49b88e29a034e1a9b",
                "channel_point": "d80502de8177188a7f5feeadcba6ee293fe343349b5d8f644c44e8bc01e6fa18:1",
                "capacity": "10000000",
                "local_balance": "8275621",
                "remote_balance": "1723434",
                "local_chan_reserve_sat": "0",
                "remote_chan_reserve_sat": "0",
                "initiator": "INITIATOR_REMOTE",
                "commitment_type": "ANCHORS",
                "num_forwarding_packages": "0",
                "chan_status_flags": "",
                "private": false,
                "memo": "",
                "custom_channel_data": ""
            },
            "closing_txid": "3cf84740a620085b04f49981fec865978f2d980498054afc27a129e0431d6097",
            "limbo_balance": "8275621",
            "maturity_height": 900474,
            "blocks_til_maturity": 58,
            "recovered_balance": "0",
            "pending_htlcs": [],
            "anchor": "LOST"
        },
        {
            "channel": {
                "remote_node_pub": "031553e9308e9cffd3dfbd4069fa9d561ec4c0ae6bc658c696f1137d62ff77a619",
                "channel_point": "1f580672bc1c128b9f3db927e5938fd0e8f04a028e387c0bee326545f818e833:1",
                "capacity": "10000000",
                "local_balance": "7809934",
                "remote_balance": "1957040",
                "local_chan_reserve_sat": "0",
                "remote_chan_reserve_sat": "0",
                "initiator": "INITIATOR_LOCAL",
                "commitment_type": "ANCHORS",
                "num_forwarding_packages": "0",
                "chan_status_flags": "",
                "private": false,
                "memo": "",
                "custom_channel_data": ""
            },
            "closing_txid": "66c6754c8aeb2c917b728c27513324a7fe2eadcda9076c684eb209b219105603",
            "limbo_balance": "231149",
            "maturity_height": 0,
            "blocks_til_maturity": 0,
            "recovered_balance": "330",
            "pending_htlcs": [
                {
                    "incoming": false,
                    "amount": "102481",
                    "outpoint": "56a7148d1bf7152eec3fc4645f8c8e5b868e029d86959bc454db3ad74c23da8e:0",
                    "maturity_height": 900775,
                    "blocks_til_maturity": 359,
                    "stage": 2
                },
                {
                    "incoming": false,
                    "amount": "128668",
                    "outpoint": "7285e016f2b410cc7393b36ec981df87bbd0432012fbca69fd3ffab55bee34d4:0",
                    "maturity_height": 900918,
                    "blocks_til_maturity": 502,
                    "stage": 2
                }
            ],
            "anchor": "RECOVERED"
        }

[saubyk]

Your seems to be addressed. Converting this thread into a discussion, in case more input is needed here.