core-lightning/plugins/bkpr/account_entry.h
niftynei 5f41d9247e bkpr: properly account for onchain fees for channel closes
onchain fees are weird at channel close because:

- you may be missing an trimmed htlc (which went to fees)
- the balance from close may have been rounded (msats cant land on
chain)
- the close might have been a past state and you've actually
  ended up with more money onchain than you had in the channel. wut

This commit accounts for all of this appropriately, with some tests.

channel_close.debit should equal onchain_fee.credit (for that txid)
plus sum(chain_event.credit [wallet/channel_acct]).

In the penalty case, channel_close.debit becomes channel_close.debit +
penalty_adj.debit, i.e.

	channel-close.debit + (penalty_adj.debit) =
		onchain_fee.credit
	      + sum(chain_event.credit [wallet/channel_acct])
2022-07-28 12:08:18 +09:30

17 lines
501 B
C

#ifndef LIGHTNING_PLUGINS_BKPR_ACCOUNT_ENTRY_H
#define LIGHTNING_PLUGINS_BKPR_ACCOUNT_ENTRY_H
#include "config.h"
#define NUM_ACCOUNT_ENTRY_TAGS (JOURNAL_ENTRY + 1)
enum account_entry_tag {
JOURNAL_ENTRY = 0,
PENALTY_ADJ = 1,
};
/* Convert an enum into a string */
const char *account_entry_tag_str(enum account_entry_tag tag);
/* True if entry tag found, false otherwise */
bool account_entry_tag_find(char *str, enum account_entry_tag *tag);
#endif /* LIGHTNING_PLUGINS_BKPR_ACCOUNT_ENTRY_H */