askrene: expose some internal API of refine

Expose some internal API of refine so that we can have more control on
how to fix flow constraints.

Changelog-None

Signed-off-by: Lagrang3 <[email protected]>

Author: Lagrang3

plugins/askrene/refine.c

@@ -26,8 +26,8 @@ static void destroy_reservations(struct reserve_hop *rhops, struct askrene *askr
 		reserve_remove(askrene->reserved, &rhops[i]);
 }
 
-static struct reserve_hop *new_reservations(const tal_t *ctx,
-					    const struct route_query *rq)
+struct reserve_hop *new_reservations(const tal_t *ctx,
+				     const struct route_query *rq)
 {
 	struct reserve_hop *rhops = tal_arr(ctx, struct reserve_hop, 0);
 
@@ -99,9 +99,9 @@ static void subtract_reservation(struct reserve_hop **reservations,
 	reserve_add(askrene->reserved, prev, rq->cmd->id);
 }
 
-static void create_flow_reservations(const struct route_query *rq,
-				     struct reserve_hop **reservations,
-				     const struct flow *flow)
+void create_flow_reservations(const struct route_query *rq,
+			      struct reserve_hop **reservations,
+			      const struct flow *flow)
 {
 	struct amount_msat msat;
 

plugins/askrene/refine.h

@@ -23,4 +23,14 @@ refine_with_fees_and_limits(const tal_t *ctx,
 			    struct amount_msat deliver,
 			    struct flow ***flows,
 			    double *flowset_probability);
+
+/* Create a new set of temporary reservations.
+ * Reservations are removed on destruction. */
+struct reserve_hop *new_reservations(const tal_t *ctx,
+				     const struct route_query *rq);
+
+/* Add a flow to an existing reservation set. */
+void create_flow_reservations(const struct route_query *rq,
+			      struct reserve_hop **reservations,
+			      const struct flow *flow);
 #endif /* LIGHTNING_PLUGINS_ASKRENE_REFINE_H */