|
|
|
|
#ifndef LIGHTNING_COMMON_FEATURES_H
|
|
|
|
|
#define LIGHTNING_COMMON_FEATURES_H
|
|
|
|
|
#include "config.h"
|
|
|
|
|
#include <ccan/short_types/short_types.h>
|
|
|
|
|
#include <ccan/tal/tal.h>
|
|
|
|
|
|
|
|
|
|
/* Returns true if we're OK with all these offered features. */
|
|
|
|
|
bool features_supported(const u8 *globalfeatures, const u8 *localfeatures);
|
|
|
|
|
|
|
|
|
|
/* For sending our features: tal_count() returns length. */
|
|
|
|
|
u8 *get_offered_globalfeatures(const tal_t *ctx);
|
|
|
|
|
u8 *get_offered_localfeatures(const tal_t *ctx);
|
|
|
|
|
|
|
|
|
|
/* Is this feature bit requested? (Either compulsory or optional) */
|
|
|
|
|
bool feature_offered(const u8 *features, size_t f);
|
|
|
|
|
|
|
|
|
|
/* Was this feature bit offered by them and us? */
|
|
|
|
|
bool local_feature_negotiated(const u8 *lfeatures, size_t f);
|
|
|
|
|
bool global_feature_negotiated(const u8 *gfeatures, size_t f);
|
|
|
|
|
|
|
|
|
|
/* Return a list of what features we advertize. */
|
|
|
|
|
const char **list_supported_features(const tal_t *ctx);
|
|
|
|
|
|
|
|
|
|
/* Low-level helpers to deal with big-endian bitfields. */
|
|
|
|
|
bool feature_is_set(const u8 *features, size_t bit);
|
|
|
|
|
void set_feature_bit(u8 **ptr, u32 bit);
|
|
|
|
|
|
|
|
|
|
/* BOLT #9:
|
|
|
|
|
*
|
|
|
|
|
* Flags are numbered from the least-significant bit, at bit 0 (i.e. 0x1,
|
|
|
|
|
* an _even_ bit). They are generally assigned in pairs so that features
|
|
|
|
|
* can be introduced as optional (_odd_ bits) and later upgraded to be compulsory
|
|
|
|
|
* (_even_ bits), which will be refused by outdated nodes:
|
|
|
|
|
* see [BOLT #1: The `init` Message](01-messaging.md#the-init-message).
|
|
|
|
|
*/
|
|
|
|
|
#define COMPULSORY_FEATURE(x) ((x) & 0xFFFFFFFE)
|
|
|
|
|
#define OPTIONAL_FEATURE(x) ((x) | 1)
|
|
|
|
|
|
|
|
|
|
/* BOLT #9:
|
|
|
|
|
*
|
|
|
|
|
* ## Assigned `localfeatures` flags
|
|
|
|
|
*...
|
|
|
|
|
* | Bits | Name |...
|
|
|
|
|
* | 0/1 | `option_data_loss_protect` |...
|
|
|
|
|
* | 3 | `initial_routing_sync` |...
|
|
|
|
|
* | 4/5 | `option_upfront_shutdown_script` |...
|
|
|
|
|
* | 6/7 | `gossip_queries` |...
|
|
|
|
|
* | 10/11 | `gossip_queries_ex` |...
|
|
|
|
|
*/
|
|
|
|
|
#define LOCAL_DATA_LOSS_PROTECT 0
|
|
|
|
|
#define LOCAL_INITIAL_ROUTING_SYNC 2
|
|
|
|
|
#define LOCAL_UPFRONT_SHUTDOWN_SCRIPT 4
|
|
|
|
|
#define LOCAL_GOSSIP_QUERIES 6
|
|
|
|
|
#define LOCAL_GOSSIP_QUERIES_EX 10
|
|
|
|
|
|
|
|
|
|
/* BOLT-531c8d7d9b01ab610b8a73a0deba1b9e9c83e1ed #9:
|
|
|
|
|
* | Bits | Name |...
|
|
|
|
|
* | 12/13| `option_static_remotekey` |...
|
|
|
|
|
*/
|
|
|
|
|
#define LOCAL_STATIC_REMOTEKEY 12
|
|
|
|
|
|
|
|
|
|
/* BOLT #9:
|
|
|
|
|
*
|
|
|
|
|
* ## Assigned `globalfeatures` flags
|
|
|
|
|
*...
|
|
|
|
|
* | Bits | Name | ...
|
|
|
|
|
* | 8/9 | `var_onion_optin` | ...
|
|
|
|
|
*/
|
|
|
|
|
#define GLOBAL_VAR_ONION 8
|
|
|
|
|
|
|
|
|
|
#endif /* LIGHTNING_COMMON_FEATURES_H */
|
