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63 lines
2.2 KiB
C
63 lines
2.2 KiB
C
#ifndef LIGHTNING_PLUGINS_CHANNEL_HINT_H
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#define LIGHTNING_PLUGINS_CHANNEL_HINT_H
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#include "config.h"
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#include <bitcoin/short_channel_id.h>
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#include <ccan/short_types/short_types.h>
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#include <ccan/time/time.h>
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#include <common/amount.h>
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#include <common/json_stream.h>
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#include <plugins/libplugin-pay.h>
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#include <plugins/libplugin.h>
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/* Information about channels we inferred from a) looking at our channels, and
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* b) from failures encountered during attempts to perform a payment. These
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* are attached to the root payment, since that information is
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* global. Attempts update the estimated channel capacities when starting, and
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* get remove on failure. Success keeps the capacities, since the capacities
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* changed due to the successful HTLCs. */
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struct channel_hint {
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/* The timestamp this observation was made. Used to let the
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* constraint expressed by this hint decay over time, until it
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* is fully relaxed, at which point we can forget about it
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* (the structural information is the best we can do in that
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* case).
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*/
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u32 timestamp;
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/* The short_channel_id we're going to use when referring to
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* this channel. This can either be the real scid, or the
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* local alias. The `pay` algorithm doesn't really care which
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* one it is, but we'll prefer the scid as that's likely more
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* readable than the alias. */
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struct short_channel_id_dir scid;
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/* Upper bound on remove channels inferred from payment failures. */
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struct amount_msat estimated_capacity;
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/* Is the channel enabled? */
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bool enabled;
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/* Non-null if we are one endpoint of this channel */
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struct local_hint *local;
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/* The total `amount_msat` that were used to fund the
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* channel. This is always smaller gte the
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* estimated_capacity */
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struct amount_msat capacity;
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};
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/* A collection of channel_hint instances, allowing us to handle and
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* update them more easily. */
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struct channel_hint_set {
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/* tal_arr of channel_hints. */
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struct channel_hint *hints;
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};
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bool channel_hint_update(const struct timeabs now,
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struct channel_hint *hint);
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void channel_hint_to_json(const char *name, const struct channel_hint *hint,
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struct json_stream *dest);
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#endif /* LIGHTNING_PLUGINS_CHANNEL_HINT_H */
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