[bug]: Incorrect Asset Channel Capacity Display

[shuishihang]

I opened an asset channel and set the channel capacity (AssetAmount field) to 10000000000, but upon checking the channel information, I found it was incorrect. Here is the corresponding channel information.This problem has occurred repeatedly.

{
    "channels": [
        {
            "active": true,
            "remote_pubkey": "021fdf0ff70ade6f3dad7389adfd8675959cf97afc8a49c8e0cc6e6afd31d503ec",
            "channel_point": "17683a4f55eb9ae0fb550ad8fd62e5158037f691602456d1be232925974694ea:0",
            "chan_id": "1021872912818110464",
            "capacity": "20000",
            "local_balance": "2000",
            "remote_balance": "17080",
            "commit_fee": "260",
            "commit_weight": "958",
            "fee_per_kw": "269",
            "unsettled_balance": "0",
            "total_satoshis_sent": "108678",
            "total_satoshis_received": "108678",
            "num_updates": "1274",
            "pending_htlcs": [],
            "csv_delay": 144,
            "private": true,
            "initiator": false,
            "chan_status_flags": "ChanStatusDefault",
            "local_chan_reserve_sat": "1062",
            "remote_chan_reserve_sat": "354",
            "static_remote_key": false,
            "commitment_type": "SIMPLE_TAPROOT_OVERLAY",
            "lifetime": "823",
            "uptime": "100",
            "close_address": "",
            "push_amount_sat": "2000",
            "thaw_height": 0,
            "local_constraints": {
                "csv_delay": 144,
                "chan_reserve_sat": "1062",
                "dust_limit_sat": "354",
                "max_pending_amt_msat": "19800000",
                "min_htlc_msat": "1",
                "max_accepted_htlcs": 83
            },
            "remote_constraints": {
                "csv_delay": 144,
                "chan_reserve_sat": "354",
                "dust_limit_sat": "354",
                "max_pending_amt_msat": "19800000",
                "min_htlc_msat": "1",
                "max_accepted_htlcs": 83
            },
            "alias_scids": [
                "17592186044416000005"
            ],
            "zero_conf": false,
            "zero_conf_confirmed_scid": "0",
            "peer_alias": "LNT.chengdu2",
            "peer_scid_alias": "17592186044416000422",
            "memo": "",
            "custom_channel_data": {
                "funding_assets": [
                    {
                        "version": 1,
                        "asset_genesis": {
                            "genesis_point": "6163c6dd64dc8394a14a752b6de480c8da8991cc7f367a467135c1a2bb38c2c9:5",
                            "name": "LNT",
                            "meta_hash": "83acf6a925f04714026da39016d568c47c53aff1cb0f6d67f7c3f5bb6cf05be4",
                            "asset_id": "97b98f3c45f926057d430ef71f20a6d3e25d7a00fbd1d7b72b306a49d48c9d8c"
                        },
                        "amount": 10000000000,
                        "script_key": "0250aaeb166f4234650d84a2d8a130987aeaf6950206e0905401ee74ff3f8d18e6",
                        "decimal_display": 6
                    },
                    {
                        "version": 0,
                        "asset_genesis": {
                            "genesis_point": "6163c6dd64dc8394a14a752b6de480c8da8991cc7f367a467135c1a2bb38c2c9:5",
                            "name": "LNT",
                            "meta_hash": "83acf6a925f04714026da39016d568c47c53aff1cb0f6d67f7c3f5bb6cf05be4",
                            "asset_id": "97b98f3c45f926057d430ef71f20a6d3e25d7a00fbd1d7b72b306a49d48c9d8c"
                        },
                        "amount": 5339063468,
                        "script_key": "02c96e9928ef0d2e737c08f465f518afdae42dc2fbe7bcdd53b863989ce3e69c9b",
                        "decimal_display": 6
                    },
                    {
                        "version": 0,
                        "asset_genesis": {
                            "genesis_point": "6163c6dd64dc8394a14a752b6de480c8da8991cc7f367a467135c1a2bb38c2c9:5",
                            "name": "LNT",
                            "meta_hash": "83acf6a925f04714026da39016d568c47c53aff1cb0f6d67f7c3f5bb6cf05be4",
                            "asset_id": "97b98f3c45f926057d430ef71f20a6d3e25d7a00fbd1d7b72b306a49d48c9d8c"
                        },
                        "amount": 4394529920,
                        "script_key": "02e59455c6aefe07bf365a7237270da185b12617e613549f8133cb451c5ad25ec1",
                        "decimal_display": 6
                    },
                    {
                        "version": 0,
                        "asset_genesis": {
                            "genesis_point": "6163c6dd64dc8394a14a752b6de480c8da8991cc7f367a467135c1a2bb38c2c9:5",
                            "name": "LNT",
                            "meta_hash": "83acf6a925f04714026da39016d568c47c53aff1cb0f6d67f7c3f5bb6cf05be4",
                            "asset_id": "97b98f3c45f926057d430ef71f20a6d3e25d7a00fbd1d7b72b306a49d48c9d8c"
                        },
                        "amount": 3282913114,
                        "script_key": "026b5cd075420f660a4bf6178e1b29ff18425c7c1908f0d5e16943599ce9429fb9",
                        "decimal_display": 6
                    },
                    {
                        "version": 0,
                        "asset_genesis": {
                            "genesis_point": "6163c6dd64dc8394a14a752b6de480c8da8991cc7f367a467135c1a2bb38c2c9:5",
                            "name": "LNT",
                            "meta_hash": "83acf6a925f04714026da39016d568c47c53aff1cb0f6d67f7c3f5bb6cf05be4",
                            "asset_id": "97b98f3c45f926057d430ef71f20a6d3e25d7a00fbd1d7b72b306a49d48c9d8c"
                        },
                        "amount": 3105326982,
                        "script_key": "02aa8c2818bc9998a43d56a760d117f57e02780325184b224baa275b5c228fc8ff",
                        "decimal_display": 6
                    }
                ],
                "local_assets": [],
                "remote_assets": [
                    {
                        "asset_id": "97b98f3c45f926057d430ef71f20a6d3e25d7a00fbd1d7b72b306a49d48c9d8c",
                        "amount": 26121833484
                    }
                ],
                "outgoing_htlcs": [],
                "incoming_htlcs": [],
                "capacity": 26121833484,
                "local_balance": 0,
                "remote_balance": 26121833484,
                "outgoing_htlc_balance": 0,
                "incoming_htlc_balance": 0
            }
        }

[jtobin]

Can you please provide a little more information about how you opened the channel? I see one of the funding assets is:

{
  "version": 1,
  "asset_genesis": {
      "genesis_point": "6163c6dd64dc8394a14a752b6de480c8da8991cc7f367a467135c1a2bb38c2c9:5",
      "name": "LNT",
      "meta_hash": "83acf6a925f04714026da39016d568c47c53aff1cb0f6d67f7c3f5bb6cf05be4",
      "asset_id": "97b98f3c45f926057d430ef71f20a6d3e25d7a00fbd1d7b72b306a49d48c9d8c"
  },
  "amount": 10000000000,
  "script_key": "0250aaeb166f4234650d84a2d8a130987aeaf6950206e0905401ee74ff3f8d18e6",
  "decimal_display": 6
}

whose amount matches the capacity you mentioned. But there are a bunch of other funding assets in there; the capacity listed is their sum. Did you specify these other assets in any way, or did they just sort of land in there unexpectedly?

[shuishihang]

The GroupKey parameter was the only one I didn't use—all other parameters were passed normally. It appeared unexpectedly. I've opened many asset channels, and this issue occurred accidentally a few times, with all parameters passed identically.

[jtobin]

Right, this one should be closed by the linked PR. Thanks for stumbling onto it!