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core-lightning/plugins/renepay/test/run-mcf.c
Lagrang3 79486c1e3b renepay: fixups after comments 
- remove internal gheap checks
- add check for arc_t.chanidx overflow
- remove outdated comments
- check the delta flow bounds before augmenting along a path
- get_flow_paths uses a dynamic tal array instead of a list.
- fix a unit test that depended on the order of returned flows
- fix bug: lightnind doesn't like if I reuse the partid of a failed
  flow, therefore use a higher partid than any of the previous attempts.
- plugin_err instead of LOG_BROKEN if sendpay fails and we cannot get a
  an error code.
- fix wrong comments.
- remove the background timer.
- This is a bugfix. Previous to this the MCF network was built using the
knowledge of the min and max liquidity but it didn't take into account
pending HTLCs.
- Also remove the min_prob_success option but hardcode a 90% value.

Removing some options that are not relevant to the user, they're kept
for developer mode only:
- base_fee_penalty
- min_prob_success
- prob_cost_factor
- remove heap.h, not used

Signed-off-by: Lagrang3 <eduardo.quintana@pm.me>
2023-07-31 12:58:56 +09:30

486 lines
29 KiB
C
Raw Blame History

#include "config.h"
#define RENEPAY_UNITTEST // logs are written in /tmp/debug.txt
#include "../payment.c"
#include "../flow.c"
#include "../uncertainty_network.c"
#include "../mcf.c"
#include <ccan/array_size/array_size.h>
#include <ccan/read_write_all/read_write_all.h>
#include <common/bigsize.h>
#include <common/channel_id.h>
#include <common/node_id.h>
#include <common/setup.h>
#include <common/type_to_string.h>
#include <common/wireaddr.h>
#include <inttypes.h>
#include <stdio.h>
static void swap(int *a, int *b)
{
int temp = *a;
*a = *b;
*b = temp;
}
/* Canned gossmap, taken from tests/test_gossip.py's
* setup_gossip_store_test via od -v -Anone -tx1 < /tmp/ltests-kaf30pn0/test_gossip_store_compact_noappend_1/lightning-2/regtest/gossip_store
*/
static u8 canned_map[] = {
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, 0x8a, 0x01, 0x02, 0x7b, 0xd9, 0xa5, 0xe6, 0xfb, 0x26, 0xe2, 0xe1, 0xcb, 0x9a, 0x68, 0xdf, 0x50
, 0x6c, 0x14, 0xcb, 0x5a, 0x2d, 0x12, 0x40, 0x94, 0x5e, 0xa4, 0x2d, 0xe9, 0x2a, 0x29, 0x48, 0xd5
, 0xd0, 0x2e, 0xd9, 0x0c, 0xdc, 0xba, 0xe2, 0x74, 0x6e, 0xfb, 0xca, 0x77, 0xea, 0xe9, 0xa2, 0xce
, 0x9a, 0xa8, 0x42, 0x09, 0xa3, 0xa3, 0xae, 0x0e, 0x0f, 0xcc, 0xd3, 0x93, 0xd5, 0xcc, 0x38, 0x76
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, 0xeb, 0x5b, 0xbf, 0x28, 0xc3, 0x4f, 0x3a, 0x5e, 0x33, 0x2a, 0x1f, 0xc7, 0xb2, 0xb7, 0x3c, 0xf1
, 0x88, 0x91, 0x0f, 0x00, 0x00, 0x6e, 0x00, 0x00, 0x01, 0x00, 0x01, 0x60, 0x17, 0x53, 0x7f, 0x01
, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x14, 0x00
, 0x00, 0x03, 0xe8, 0x00, 0x00, 0x00, 0x00, 0x3b, 0x02, 0x33, 0x80
};
/* not_mcf sets NDEBUG, so assert() is useless */
#define ASSERT(x) do { if (!(x)) abort(); } while(0)
static const char *print_flows(
const tal_t *ctx,
const char *desc,
const struct gossmap *gossmap,
struct flow **flows)
{
tal_t *this_ctx = tal(ctx,tal_t);
char *buff = tal_fmt(ctx,"%s: %zu subflows\n", desc, tal_count(flows));
for (size_t i = 0; i < tal_count(flows); i++) {
struct amount_msat fee, delivered;
tal_append_fmt(&buff," ");
for (size_t j = 0; j < tal_count(flows[i]->path); j++) {
struct short_channel_id scid
= gossmap_chan_scid(gossmap,
flows[i]->path[j]);
tal_append_fmt(&buff,"%s%s", j ? "->" : "",
type_to_string(this_ctx, struct short_channel_id, &scid));
}
delivered = flows[i]->amounts[tal_count(flows[i]->amounts)-1];
if (!amount_msat_sub(&fee, flows[i]->amounts[0], delivered))
abort();
tal_append_fmt(&buff," prob %.2f, %s delivered with fee %s\n",
flows[i]->success_prob,
type_to_string(this_ctx, struct amount_msat, &delivered),
type_to_string(this_ctx, struct amount_msat, &fee));
}
tal_free(this_ctx);
return buff;
}
int main(int argc, char *argv[])
{
int fd;
char *gossfile;
struct gossmap *gossmap;
struct node_id l1, l2, l3;
struct flow **flows;
struct short_channel_id scid12, scid23;
struct chan_extra_map *chan_extra_map;
common_setup(argv[0]);
fd = tmpdir_mkstemp(tmpctx, "run-not_mcf.XXXXXX", &gossfile);
assert(write_all(fd, canned_map, sizeof(canned_map)));
gossmap = gossmap_load(tmpctx, gossfile, NULL);
assert(gossmap);
remove(gossfile);
/* There is a public channel 2<->3 (103x1x0), and private
* 1<->2 (110x1x1). */
assert(node_id_from_hexstr("0266e4598d1d3c415f572a8488830b60f7e744ed9235eb0b1ba93283b315c03518", 66, &l1));
assert(node_id_from_hexstr("022d223620a359a47ff7f7ac447c85c46c923da53389221a0054c11c1e3ca31d59", 66, &l2));
assert(node_id_from_hexstr("035d2b1192dfba134e10e540875d366ebc8bc353d5aa766b80c090b39c3a5d885d", 66, &l3));
assert(short_channel_id_from_str("110x1x1", 7, &scid12));
assert(short_channel_id_from_str("103x1x0", 7, &scid23));
chan_extra_map = tal(tmpctx, struct chan_extra_map);
chan_extra_map_init(chan_extra_map);
uncertainty_network_update(gossmap,chan_extra_map);
flows = minflow(tmpctx, gossmap,
gossmap_find_node(gossmap, &l1),
gossmap_find_node(gossmap, &l3),
chan_extra_map, NULL,
/* Half the capacity */
AMOUNT_MSAT(500000000),
/* max_fee = */ AMOUNT_MSAT(1000000), // 1k sats
/* min probability = */ 0.1,
/* delay fee factor = */ 1,
/* base fee penalty */ 1,
/* prob cost factor = */ 10);
commit_flow_set(gossmap,chan_extra_map,flows);
debug_info("%s\n",
print_flows(tmpctx,"Flow via single path l1->l2->l3", gossmap, flows));
/* Should go 1->2->3 */
assert(tal_count(flows) == 1);
assert(tal_count(flows[0]->path) == 2);
assert(tal_count(flows[0]->dirs) == 2);
assert(tal_count(flows[0]->amounts) == 2);
assert(flows[0]->path[0] == gossmap_find_chan(gossmap, &scid12));
assert(flows[0]->path[1] == gossmap_find_chan(gossmap, &scid23));
assert(flows[0]->dirs[0] == 1);
assert(flows[0]->dirs[1] == 0);
assert(amount_msat_eq(flows[0]->amounts[1], AMOUNT_MSAT(500000000)));
/* fee_base_msat == 20, fee_proportional_millionths == 1000 */
assert(amount_msat_eq(flows[0]->amounts[0], AMOUNT_MSAT(500000000 + 500000 + 20)));
/* Each one has probability ~ 0.5 */
assert(flows[0]->success_prob > 0.249);
assert(flows[0]->success_prob <= 0.250);
/* Should have filled in some extra data! */
struct chan_extra *ce = chan_extra_map_get(chan_extra_map, scid12);
assert(short_channel_id_eq(&ce->scid, &scid12));
/* l1->l2 dir is 1 */
assert(ce->half[1].num_htlcs == 1);
assert(amount_msat_eq(ce->half[1].htlc_total, AMOUNT_MSAT(500000000 + 500000 + 20)));
assert(amount_msat_eq(ce->half[1].known_min, AMOUNT_MSAT(0)));
assert(amount_msat_eq(ce->half[1].known_max, AMOUNT_MSAT(1000000000)));
assert(ce->half[0].num_htlcs == 0);
assert(amount_msat_eq(ce->half[0].htlc_total, AMOUNT_MSAT(0)));
assert(amount_msat_eq(ce->half[0].known_min, AMOUNT_MSAT(0)));
assert(amount_msat_eq(ce->half[0].known_max, AMOUNT_MSAT(1000000000)));
ce = chan_extra_map_get(chan_extra_map, scid23);
assert(short_channel_id_eq(&ce->scid, &scid23));
/* l2->l3 dir is 0 */
assert(ce->half[0].num_htlcs == 1);
assert(amount_msat_eq(ce->half[0].htlc_total, AMOUNT_MSAT(500000000)));
assert(amount_msat_eq(ce->half[0].known_min, AMOUNT_MSAT(0)));
assert(amount_msat_eq(ce->half[0].known_max, AMOUNT_MSAT(1000000000)));
assert(ce->half[1].num_htlcs == 0);
assert(amount_msat_eq(ce->half[1].htlc_total, AMOUNT_MSAT(0)));
assert(amount_msat_eq(ce->half[1].known_min, AMOUNT_MSAT(0)));
assert(amount_msat_eq(ce->half[1].known_max, AMOUNT_MSAT(1000000000)));
// /* Now try adding a local channel scid */
struct short_channel_id scid13;
struct gossmap_localmods *mods = gossmap_localmods_new(tmpctx);
assert(short_channel_id_from_str("111x1x1", 7, &scid13));
/* 400,000sat channel from 1->3, basefee 0, ppm 1000, delay 5 */
assert(gossmap_local_addchan(mods, &l1, &l3, &scid13, NULL));
assert(gossmap_local_updatechan(mods, &scid13,
AMOUNT_MSAT(0),
AMOUNT_MSAT(400000000),
0, 1000, 5,
true,
0));
/* Apply changes, check they work. */
gossmap_apply_localmods(gossmap, mods);
struct gossmap_chan *local_chan = gossmap_find_chan(gossmap, &scid13);
assert(local_chan);
/* Clear that */
remove_completed_flow_set(gossmap, chan_extra_map, flows);
/* The local chans have no "capacity", so set it manually. */
new_chan_extra(chan_extra_map, scid13,
AMOUNT_MSAT(400000000));
// flows = minflow(tmpctx, gossmap,
// gossmap_find_node(gossmap, &l1),
// gossmap_find_node(gossmap, &l3),
// chan_extra_map, NULL,
// /* This will go first via 1-2-3, then 1->3. */
// AMOUNT_MSAT(500000000),
// /* max_fee = */ AMOUNT_MSAT(1000000), // 1k sats
// /* min probability = */ 0.4,
// /* delay fee factor = */ 1,
// /* base fee penalty */ 1,
// /* prob cost factor = */ 10);
// print_flows("Flow via two paths, low mu", gossmap, flows);
// assert(tal_count(flows) == 2);
//
// if(tal_count(flows[0]->path)<tal_count(flows[1]->path))
// {
// struct flow* tmp = flows[0];
// flows[0] = flows[1];
// flows[1]=tmp;
// }
//
// assert(tal_count(flows[0]->path) == 2);
// assert(tal_count(flows[0]->dirs) == 2);
// assert(tal_count(flows[0]->amounts) == 2);
// assert(flows[0]->path[0] == gossmap_find_chan(gossmap, &scid12));
// assert(flows[0]->path[1] == gossmap_find_chan(gossmap, &scid23));
// assert(flows[0]->dirs[0] == 1);
// assert(flows[0]->dirs[1] == 0);
// /* First one has probability ~ 50% */
// assert(flows[0]->success_prob < 0.55);
// assert(flows[0]->success_prob > 0.45);
// assert(tal_count(flows[1]->path) == 1);
// assert(tal_count(flows[1]->dirs) == 1);
// assert(tal_count(flows[1]->amounts) == 1);
// /* We will try cheaper path first, but not to fill it! */
// assert(flows[1]->path[0] == gossmap_find_chan(gossmap, &scid13));
// assert(flows[1]->dirs[0] == 0);
// assert(amount_msat_less(flows[1]->amounts[0], AMOUNT_MSAT(400000000)));
// /* Second one has probability ~ 50% */
// assert(flows[1]->success_prob < 0.55);
// assert(flows[1]->success_prob > 0.45);
// /* Delivered amount must be the total! */
// assert(flows[0]->amounts[1].millisatoshis
// + flows[1]->amounts[0].millisatoshis == 500000000);
// /* Clear them. */
// remove_completed_flow(gossmap, chan_extra_map, flows[0]);
// remove_completed_flow(gossmap, chan_extra_map, flows[1]);
/* Higher mu values mean we pay more for certainty! */
struct flow **flows2 = minflow(tmpctx, gossmap,
gossmap_find_node(gossmap, &l1),
gossmap_find_node(gossmap, &l3),
chan_extra_map, NULL,
/* This will go 400000000 via 1->3, rest via 1-2-3. */
/* amount = */ AMOUNT_MSAT(500000000), //500k sats
/* max_fee = */ AMOUNT_MSAT(1000000), // 1k sats
/* min probability = */ 0.1, // 10%
/* delay fee factor = */ 1,
/* base fee penalty */ 1,
/* prob cost factor = */ 10);
debug_info("%s\n",
print_flows(tmpctx,"Flow via two paths, high mu", gossmap, flows2));
assert(tal_count(flows2) == 2);
/* The solution is composed by two paths, one with lenght 1 and the
* other with lenght 2. There is no guaranteed order of the solutions
* returning from minflow, hence we need to test them. */
int ID1 = 0, ID2 = 1;
if(tal_count(flows2[ID1]->path)==2)
{
swap(&ID1,&ID2);
}
assert(tal_count(flows2[ID1]->path) == 1);
assert(tal_count(flows2[ID2]->path) == 2);
// /* Sends more via 1->3, since it's more expensive (but lower prob) */
assert(amount_msat_greater(flows2[ID1]->amounts[0], flows2[ID2]->amounts[0]));
assert(flows2[ID1]->success_prob < flows2[ID2]->success_prob);
/* Delivered amount must be the total! */
assert(flows2[ID1]->amounts[0].millisatoshis
+ flows2[ID2]->amounts[1].millisatoshis == 500000000);
// /* But in total it's more expensive! */
assert(flows2[ID1]->amounts[0].millisatoshis + flows2[ID2]->amounts[0].millisatoshis
> flows2[ID1]->amounts[0].millisatoshis - flows2[ID2]->amounts[0].millisatoshis);
common_shutdown();
}
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