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bb68e65b7a
- add more checks - add more error messages - compute probabilities without fees during MCF - compute probabilities with fees during get_routes Signed-off-by: Lagrang3 <lagrang3@protonmail.com>
95 lines
3.2 KiB
C
95 lines
3.2 KiB
C
#ifndef LIGHTNING_PLUGINS_RENEPAY_FLOW_H
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#define LIGHTNING_PLUGINS_RENEPAY_FLOW_H
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#include "config.h"
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#include <bitcoin/short_channel_id.h>
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#include <ccan/htable/htable_type.h>
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#include <common/amount.h>
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#include <common/gossmap.h>
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#include <plugins/renepay/chan_extra.h>
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#include <plugins/renepay/errorcodes.h>
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/* An actual partial flow. */
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struct flow {
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const struct gossmap_chan **path;
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/* The directions to traverse. */
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int *dirs;
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/* Amounts for this flow (fees mean this shrinks across path). */
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double success_prob;
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struct amount_msat amount;
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};
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const char *fmt_flows(const tal_t *ctx, const struct gossmap *gossmap,
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struct chan_extra_map *chan_extra_map,
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struct flow **flows);
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/* Helper to access the half chan at flow index idx */
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const struct half_chan *flow_edge(const struct flow *flow, size_t idx);
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/* A big number, meaning "don't bother" (not infinite, since you may add) */
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#define FLOW_INF_COST 100000000.0
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/* Cost function to send @f msat through @c in direction @dir,
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* given we already have a flow of prev_flow. */
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double flow_edge_cost(const struct gossmap *gossmap,
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const struct gossmap_chan *c, int dir,
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const struct amount_msat known_min,
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const struct amount_msat known_max,
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struct amount_msat prev_flow,
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struct amount_msat f,
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double mu,
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double basefee_penalty,
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double delay_riskfactor);
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/* Compute the prob. of success of a set of concurrent set of flows. */
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double flowset_probability(const tal_t *ctx, struct flow **flows,
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const struct gossmap *const gossmap,
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struct chan_extra_map *chan_extra_map,
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bool compute_fees, char **fail);
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/* How much do we need to send to make this flow arrive. */
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bool flow_spend(struct amount_msat *ret, struct flow *flow);
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/* How much do we pay in fees to make this flow arrive. */
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bool flow_fee(struct amount_msat *ret, struct flow *flow);
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bool flowset_fee(struct amount_msat *fee, struct flow **flows);
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bool flowset_delivers(struct amount_msat *delivers, struct flow **flows);
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/* how many channels are being used */
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size_t flowset_size(struct flow **flows);
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static inline struct amount_msat flow_delivers(const struct flow *flow)
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{
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return flow->amount;
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}
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struct amount_msat *tal_flow_amounts(const tal_t *ctx, const struct flow *flow,
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bool compute_fees);
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enum renepay_errorcode
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flow_maximum_deliverable(struct amount_msat *max_deliverable,
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const struct flow *flow,
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const struct gossmap *gossmap,
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struct chan_extra_map *chan_extra_map,
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const struct gossmap_chan **bad_channel);
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/* Assign the delivered amount to the flow if it fits
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the path maximum capacity. */
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bool flow_assign_delivery(struct flow *flow, const struct gossmap *gossmap,
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struct chan_extra_map *chan_extra_map,
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struct amount_msat requested_amount);
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double flow_probability(struct flow *flow, const struct gossmap *gossmap,
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struct chan_extra_map *chan_extra_map,
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bool compute_fees);
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u64 flow_delay(const struct flow *flow);
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u64 flows_worst_delay(struct flow **flows);
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struct flow **
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flows_ensure_liquidity_constraints(const tal_t *ctx, struct flow **flows TAKES,
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const struct gossmap *gossmap,
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struct chan_extra_map *chan_extra_map);
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#endif /* LIGHTNING_PLUGINS_RENEPAY_FLOW_H */
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