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wallet: delete peers with no channels.

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ON DELETE CASCADE goes the other way: we should clean up peers with no
channels from db.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2018-02-12 20:40:40 +10:30 committed by Christian Decker
parent 38a313af0d
commit 81ca1db347
3 changed files with 16 additions and 4 deletions
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2
lightningd/peer_control.c
View File

@ -181,7 +181,7 @@ static void free_peer(struct peer *peer, const char *why)
command_fail(peer->opening_cmd, "%s", why);
peer->opening_cmd = NULL;
}
wallet_channel_delete(peer->ld->wallet, peer->channel->id);
wallet_channel_delete(peer->ld->wallet, peer->channel->id, peer->dbid);
tal_free(peer);
}

14
wallet/wallet.c
View File

@ -866,12 +866,22 @@ void wallet_channel_save(struct wallet *w, struct wallet_channel *chan)
tal_free(tmpctx);
}
void wallet_channel_delete(struct wallet *w, u64 wallet_id)
void wallet_channel_delete(struct wallet *w, u64 wallet_id, u64 peer_dbid)
{
sqlite3_stmt *stmt;
stmt = db_prepare(w->db, "DELETE FROM channels WHERE id=?");
/* FIXME: The line to clean up if we're last channel for peer would
* be better as a trigger. */
stmt = db_prepare(w->db,
"DELETE FROM channels WHERE id=?");
sqlite3_bind_int64(stmt, 1, wallet_id);
db_exec_prepared(w->db, stmt);
stmt = db_prepare(w->db,
"DELETE FROM peers WHERE id = ? AND NOT EXISTS"
" (SELECT 1 FROM channels WHERE peer_id = ?)");
sqlite3_bind_int64(stmt, 1, peer_dbid);
sqlite3_bind_int64(stmt, 2, peer_dbid);
db_exec_prepared(w->db, stmt);
}
int wallet_extract_owned_outputs(struct wallet *w, const struct bitcoin_tx *tx,

4
wallet/wallet.h
View File

@ -225,8 +225,10 @@ void wallet_channel_save(struct wallet *w, struct wallet_channel *chan);
/**
* wallet_channel_delete -- After resolving a channel, forget about it
*
* Deletes peer too if no more channels.
*/
void wallet_channel_delete(struct wallet *w, u64 wallet_id);
void wallet_channel_delete(struct wallet *w, u64 wallet_id, u64 peer_dbid);
/**
* wallet_channel_config_save -- Upsert a channel_config into the database