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openchannel2: add channel_max_msat to openchannel2 hook payload

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Changelog-Added: Plugins: add a `channel_max_msat` value to the `openchannel2` hook. Tells you the total max funding this channel is allowed to have.
This commit is contained in:
niftynei 2021-04-20 16:56:07 -05:00 committed by Rusty Russell
parent 382264e207
commit 7c76363e20
3 changed files with 13 additions and 0 deletions
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1
doc/PLUGINS.md
View File

@ -1034,6 +1034,7 @@ the v2 protocol, and it has passed basic sanity checks:
"max_accepted_htlcs": 483,
"channel_flags": 1
"locktime": 2453,
"channel_max_msat": "16777215000msat"
}
}
```

11
lightningd/dual_open_control.c
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@ -241,6 +241,9 @@ struct openchannel2_payload {
u8 channel_flags;
u32 locktime;
u8 *shutdown_scriptpubkey;
/* What's the maximum amount of funding
* this channel can hold */
struct amount_sat channel_max;
struct amount_sat accepter_funding;
struct wally_psbt *psbt;
@ -278,6 +281,8 @@ openchannel2_hook_serialize(struct openchannel2_payload *payload,
if (tal_bytelen(payload->shutdown_scriptpubkey) != 0)
json_add_hex_talarr(stream, "shutdown_scriptpubkey",
payload->shutdown_scriptpubkey);
json_add_amount_sat_only(stream, "channel_max_msat",
payload->channel_max);
json_object_end(stream);
}
@ -1695,6 +1700,12 @@ static void accepter_got_offer(struct subd *dualopend,
payload->feerate_our_min = feerate_min(dualopend->ld, NULL);
payload->feerate_our_max = feerate_max(dualopend->ld, NULL);
payload->channel_max = chainparams->max_funding;
if (feature_negotiated(dualopend->ld->our_features,
channel->peer->their_features,
OPT_LARGE_CHANNELS))
payload->channel_max = AMOUNT_SAT(UINT64_MAX);
tal_add_destructor2(dualopend, openchannel2_remove_dualopend, payload);
plugin_hook_call_openchannel2(dualopend->ld, payload);
}

1
tests/test_plugin.py
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@ -606,6 +606,7 @@ def test_openchannel_hook(node_factory, bitcoind):
'feerate_our_min': '1875',
'locktime': '.*',
'their_funding': '100000000msat',
'channel_max_msat': '16777215000msat',
})
else:
expected.update({