lightningd/runes: update last_used timestamp when a rune successfully…

… used

lightningd/runes.c

@@ -786,6 +786,12 @@ static const char *check_condition(const tal_t *ctx,
 				   ptok->end - ptok->start);
 }
 
+static void update_rune_usage_time(struct runes *runes,
+						 struct rune *rune)
+{
+	wallet_rune_update_last_used(runes->ld->wallet, rune, time_now());
+}
+
 static struct command_result *json_checkrune(struct command *cmd,
 						 const char *buffer,
 						 const jsmntok_t *obj UNNEEDED,
@@ -835,6 +841,7 @@ static struct command_result *json_checkrune(struct command *cmd,
 	/* If it succeeded, *now* we increment any associated usage counter. */
 	if (cinfo.usage)
 		cinfo.usage->counter++;
+	update_rune_usage_time(cmd->ld->runes, ras->rune);
 
 	js = json_stream_success(cmd);
 	json_add_bool(js, "valid", true);

wallet/wallet.c

@@ -5753,6 +5753,20 @@ void wallet_rune_insert(struct wallet *wallet, const struct rune *rune)
 	db_rune_insert(wallet->db, rune);
 }
 
+void wallet_rune_update_last_used(struct wallet *wallet, const struct rune *rune, struct timeabs last_used)
+{
+	struct db_stmt *stmt;
+	struct timerel t;
+
+	t.ts = last_used.ts;
+	stmt = db_prepare_v2(wallet->db,
+			     SQL("UPDATE runes SET last_used_nsec = ? WHERE id = ?;"));
+	db_bind_u64(stmt, time_to_nsec(t));
+	db_bind_u64(stmt, rune_unique_id(rune));
+	db_exec_prepared_v2(stmt);
+	tal_free(stmt);
+}
+
 static void db_insert_blacklist(struct db *db,
 				const struct rune_blacklist *entry)
 {
@@ -5852,7 +5866,8 @@ void migrate_datastore_commando_runes(struct lightningd *ld, struct db *db)
 void migrate_runes_idfix(struct lightningd *ld, struct db *db)
 {
 	/* ID fields were wrong.  Pull them all out and put them back */
-	const char **runes = db_get_runes(tmpctx, db, NULL);
+	struct timeabs *last_used;
+	const char **runes = db_get_runes(tmpctx, db, &last_used);
 	struct db_stmt *stmt;
 
 	stmt = db_prepare_v2(db, SQL("DELETE FROM runes;"));

wallet/wallet.h

@@ -1607,6 +1607,15 @@ const char **wallet_get_runes(const tal_t *ctx, struct wallet *wallet, struct ti
  */
 void wallet_rune_insert(struct wallet *wallet, const struct rune *rune);
 
+/**
+ * wallet_rune_update_last_used -- Update the timestamp on an existing rune
+ *
+ * @wallet: the wallet to save into
+ * @rune: the instance to store
+ * @last_used: now
+ */
+void wallet_rune_update_last_used(struct wallet *wallet, const struct rune *rune, struct timeabs last_used);
+
 /* Load the runes blacklist */
 struct rune_blacklist {
 	u64 start, end;