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#ifndef LIGHTNING_COMMON_GOSSIP_CONSTANTS_H
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#define LIGHTNING_COMMON_GOSSIP_CONSTANTS_H
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#include "config.h"
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#include <common/utils.h>
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/* BOLT #4:
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*
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* - a 1300-byte `hop_payloads` consisting of multiple, variable length,
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* `hop_payload` payloads or up to 20 fixed sized legacy `hop_data` payloads.
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*/
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#define ROUTING_MAX_HOPS 20
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/* BOLT #7:
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*
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* The `channel_flags` bitfield...individual bits:
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*...
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* | 0 | `direction` | Direction this update refers to. |
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* | 1 | `disable` | Disable the channel. |
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*/
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#define ROUTING_FLAGS_DIRECTION (1 << 0)
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#define ROUTING_FLAGS_DISABLED (1 << 1)
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/* BOLT #7:
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*
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* The `message_flags` bitfield is used to indicate the presence of optional
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* fields in the `channel_update` message:
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* | Bit Position | Name | Field |
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* | ------------- | ------------------------- | ----------------...- |
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* | 0 | `option_channel_htlc_max` | `htlc_maximum_msat` |
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*/
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#define ROUTING_OPT_HTLC_MAX_MSAT (1 << 0)
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/* BOLT #7:
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*
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* - MUST NOT send `announcement_signatures` messages until `funding_locked`
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* has been sent and received AND the funding transaction has at least six
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* confirmations.
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*/
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#define ANNOUNCE_MIN_DEPTH 6
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/* Gossip timing constants. These can be overridden in --enable-developer
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* configurations with --dev-fast-gossip, otherwise the argument is ignored */
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#define DEV_FAST_GOSSIP(dev_fast_gossip_flag, fast, normal) \
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IFDEV((dev_fast_gossip_flag) ? (fast) : (normal), (normal))
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/* How close we can generate gossip msgs (5 minutes) */
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#define GOSSIP_MIN_INTERVAL(dev_fast_gossip_flag) \
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DEV_FAST_GOSSIP(dev_fast_gossip_flag, 5, 300)
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/* BOLT #7:
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*
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* - SHOULD flush outgoing gossip messages once every 60 seconds,
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* independently of the arrival times of the messages.
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*/
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#define GOSSIP_FLUSH_INTERVAL(dev_fast_gossip_flag) \
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DEV_FAST_GOSSIP(dev_fast_gossip_flag, 1, 60)
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/* BOLT #7:
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*
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* A node:
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* - if a channel's latest `channel_update`s `timestamp` is older than two weeks
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* (1209600 seconds):
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* - MAY prune the channel.
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* - MAY ignore the channel.
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*/
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#define GOSSIP_PRUNE_INTERVAL(dev_fast_gossip_prune_flag) \
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DEV_FAST_GOSSIP(dev_fast_gossip_prune_flag, 60, 1209600)
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/* How long after seeing lockin until we announce the channel. */
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#define GOSSIP_ANNOUNCE_DELAY(dev_fast_gossip_flag) \
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DEV_FAST_GOSSIP(dev_fast_gossip_flag, 1, 60)
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/* How long before deadline should we send refresh update? 1 day normally */
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#define GOSSIP_BEFORE_DEADLINE(dev_fast_gossip_prune_flag) \
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DEV_FAST_GOSSIP(dev_fast_gossip_prune_flag, 30, 24*60*60)
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/* How many seconds per token? Normally 1 hour. */
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#define GOSSIP_TOKEN_TIME(dev_fast_gossip_flag) \
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DEV_FAST_GOSSIP(dev_fast_gossip_flag, 1, 3600)
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#endif /* LIGHTNING_COMMON_GOSSIP_CONSTANTS_H */
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