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pay: Tweak interface of remote_routing_failure.

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In preparation for a common interface to reporting routing failures
  to JSON-RPC interface.
This commit is contained in:
ZmnSCPxj 2018-02-03 10:44:31 +00:00 committed by Christian Decker
parent a1b9fa7538
commit 452925c05a
1 changed files with 30 additions and 23 deletions
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53
lightningd/pay.c
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@ -190,13 +190,16 @@ local_routing_failure(const tal_t *ctx,
* retrying is plausible. Fill *routing_failure with NULL if
* we cannot report the remote failure, or with the routing
* failure to report (allocated from ctx) otherwise. */
static bool remote_routing_failure(const tal_t *ctx,
struct routing_failure **routing_failure,
const struct wallet_payment *payment,
const struct onionreply *failure)
static struct routing_failure*
remote_routing_failure(const tal_t *ctx,
bool *p_retry_plausible,
bool *p_report_to_gossipd,
const struct wallet_payment *payment,
const struct onionreply *failure)
{
enum onion_type failcode = fromwire_peektype(failure->msg);
u8 *channel_update;
struct routing_failure *routing_failure;
const struct pubkey *route_nodes;
const struct pubkey *erring_node;
const struct short_channel_id *route_channels;
@ -206,12 +209,12 @@ static bool remote_routing_failure(const tal_t *ctx,
bool retry_plausible;
bool report_to_gossipd;
*routing_failure = tal(ctx, struct routing_failure);
routing_failure = tal(ctx, struct routing_failure);
route_nodes = payment->route_nodes;
route_channels = payment->route_channels;
origin_index = failure->origin_index;
channel_update
= channel_update_from_onion_error(*routing_failure,
= channel_update_from_onion_error(routing_failure,
failure->msg);
retry_plausible = true;
report_to_gossipd = true;
@ -220,6 +223,7 @@ static bool remote_routing_failure(const tal_t *ctx,
/* Check if at destination. */
if (origin_index == tal_count(route_nodes) - 1) {
erring_channel = &dummy_channel;
/* BOLT #4:
*
* - if the _final node_ is returning the error:
@ -233,10 +237,9 @@ static bool remote_routing_failure(const tal_t *ctx,
/* Only send message to gossipd if NODE error;
* there is no "next" channel to report as
* failing if this is the last node. */
if (failcode & NODE) {
erring_channel = &dummy_channel;
if (failcode & NODE)
report_to_gossipd = true;
} else
else
report_to_gossipd = false;
} else
/* Report the *next* channel as failing. */
@ -244,16 +247,16 @@ static bool remote_routing_failure(const tal_t *ctx,
erring_node = &route_nodes[origin_index];
if (report_to_gossipd) {
(*routing_failure)->origin_index = origin_index;
(*routing_failure)->failcode = failcode;
(*routing_failure)->erring_node = *erring_node;
(*routing_failure)->erring_channel = *erring_channel;
(*routing_failure)->channel_update = channel_update;
} else
*routing_failure = tal_free(*routing_failure);
routing_failure->origin_index = origin_index;
routing_failure->failcode = failcode;
routing_failure->erring_node = *erring_node;
routing_failure->erring_channel = *erring_channel;
routing_failure->channel_update = channel_update;
return retry_plausible;
*p_retry_plausible = retry_plausible;
*p_report_to_gossipd = report_to_gossipd;
return routing_failure;
}
static void report_routing_failure(struct log *log,
@ -294,6 +297,7 @@ void payment_failed(struct lightningd *ld, const struct htlc_out *hout,
struct routing_failure* fail = NULL;
const char *failmsg;
bool retry_plausible;
bool report_to_gossipd;
payment = wallet_payment_by_hash(tmpctx, ld->wallet,
&hout->payment_hash);
@ -304,6 +308,7 @@ void payment_failed(struct lightningd *ld, const struct htlc_out *hout,
failcode = fail->failcode;
failmsg = localfail;
retry_plausible = true;
report_to_gossipd = true;
} else {
/* Must be remote fail. */
assert(!hout->failcode);
@ -324,6 +329,7 @@ void payment_failed(struct lightningd *ld, const struct htlc_out *hout,
/* Not safe to retry, not know what failed. */
/* FIXME: some mitigation for this branch. */
retry_plausible = false;
report_to_gossipd = false;
} else {
failcode = fromwire_peektype(reply->msg);
log_info(hout->key.peer->log,
@ -333,9 +339,10 @@ void payment_failed(struct lightningd *ld, const struct htlc_out *hout,
hout->key.id,
reply->origin_index,
failcode, onion_type_name(failcode));
retry_plausible
= remote_routing_failure(tmpctx, &fail,
payment, reply);
fail = remote_routing_failure(tmpctx,
&retry_plausible,
&report_to_gossipd,
payment, reply);
}
}
@ -345,8 +352,8 @@ void payment_failed(struct lightningd *ld, const struct htlc_out *hout,
wallet_payment_set_status(ld->wallet, &hout->payment_hash,
PAYMENT_FAILED, NULL);
/* Report to gossipd if there is something we can report. */
if (fail)
/* Report to gossipd if we decided we should. */
if (report_to_gossipd)
report_routing_failure(ld->log, ld->gossip, fail);
/* FIXME(ZmnSCPxj): if retrying is plausible, and we are