mirrors/core-lightning
1
0
Fork 0
mirror of https://github.com/ElementsProject/lightning.git synced 2025-02-22 14:42:40 +01:00
Code Issues Projects Releases Wiki Activity

wallet: Added helper to rewire HTLCs after loading from DB

Browse source 
This is a necessary evil since at the time we load `struct htlc_out`
associated with a channel we might not have loaded the `struct
htlc_in` that it depends on, so we defer the rewiring until we have
loaded all HTLCs for all channels. At that point rewiring MUST work,
otherwise we report a failure.

Signed-off-by: Christian Decker <decker.christian@gmail.com>
This commit is contained in:
Christian Decker 2017-09-26 14:40:41 +02:00 • committed by Rusty Russell
parent c6f210a46c
commit df9b8e22b4
2 changed files with 52 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

41
wallet/wallet.c
View file

@ -1064,3 +1064,44 @@ bool wallet_htlcs_load_for_channel(struct wallet *wallet,
return ok;
}
bool wallet_htlcs_reconnect(struct wallet *wallet,
struct htlc_in_map *htlcs_in,
struct htlc_out_map *htlcs_out)
{
struct htlc_in_map_iter ini;
struct htlc_out_map_iter outi;
struct htlc_in *hin;
struct htlc_out *hout;
for (hout = htlc_out_map_first(htlcs_out, &outi); hout;
hout = htlc_out_map_next(htlcs_out, &outi)) {
if (hout->origin_htlc_id == 0) {
continue;
}
for (hin = htlc_in_map_first(htlcs_in, &ini); hin;
hin = htlc_in_map_next(htlcs_in, &ini)) {
if (hout->origin_htlc_id == hin->dbid) {
log_debug(wallet->log,
"Found corresponding htlc_in %" PRIu64
" for htlc_out %" PRIu64,
hin->dbid, hout->dbid);
hout->in = hin;
break;
}
}
if (!hout->in) {
log_broken(
wallet->log,
"Unable to find corresponding htlc_in %" PRIu64
" for htlc_out %" PRIu64,
hout->origin_htlc_id, hout->dbid);
return false;
}
}
return true;
}

11
wallet/wallet.h
View file

@ -289,4 +289,15 @@ bool wallet_htlcs_load_for_channel(struct wallet *wallet,
struct htlc_in_map *htlcs_in,
struct htlc_out_map *htlcs_out);
/**
* wallet_htlcs_reconnect -- Link outgoing HTLCs to their origins
*
* For each outgoing HTLC find the incoming HTLC that triggered it. If
* we are the origin of the transfer then we cannot resolve the
* incoming HTLC in which case we just leave it `NULL`.
*/
bool wallet_htlcs_reconnect(struct wallet *wallet,
struct htlc_in_map *htlcs_in,
struct htlc_out_map *htlcs_out);
#endif /* WALLET_WALLET_H */