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plugin: make sure multifundchannel / fundchannel unreserve correctly on failure.

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We were marking our inputs very late, which means any early failure
would not know to unreserve them.

This becomes particularly bad when we start enforcing emergency reserves.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2023-06-29 09:44:09 +09:30
parent 7894d7136f
commit d882a38619
1 changed files with 4 additions and 5 deletions
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9
plugins/spender/multifundchannel.c
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@ -1203,11 +1203,6 @@ mfc_psbt_acquired(struct multifundchannel_command *mfc)
* for the life of the tx */
psbt_add_serials(mfc->psbt, TX_INITIATOR);
/* We also mark all of our inputs as *ours*, so we
* can easily identify them for `signpsbt`, later */
for (size_t i = 0; i < mfc->psbt->num_inputs; i++)
psbt_input_mark_ours(mfc->psbt, &mfc->psbt->inputs[i]);
return perform_channel_start(mfc);
}
@ -1372,6 +1367,10 @@ after_fundpsbt(struct command *cmd,
if (!psbt_set_version(mfc->psbt, 2))
goto fail;
/* Mark our inputs now, so we unreserve correctly on failure! */
for (size_t i = 0; i < mfc->psbt->num_inputs; i++)
psbt_input_mark_ours(mfc->psbt, &mfc->psbt->inputs[i]);
field = json_get_member(buf, result, "feerate_per_kw");
if (!field || !json_to_u32(buf, field, &mfc->feerate_per_kw))
goto fail;