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pay: Split the onion construction from sendpay

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This commit is contained in:
Christian Decker 2019-11-07 21:58:32 +01:00
parent 8daf9b2577
commit e13ee29544
1 changed files with 17 additions and 10 deletions
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27
lightningd/pay.c
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@ -630,6 +630,22 @@ static bool should_use_tlv(enum route_hop_style style)
abort();
}
static enum onion_type send_onion(struct lightningd *ld,
const struct onionpacket *packet,
const struct route_hop *first_hop,
const struct sha256 *payment_hash,
struct channel *channel,
struct htlc_out **hout)
{
const u8 *onion;
unsigned int base_expiry;
base_expiry = get_block_height(ld->topology) + 1;
onion = serialize_onionpacket(tmpctx, packet);
return send_htlc_out(channel, first_hop->amount,
base_expiry + first_hop->delay,
payment_hash, onion, NULL, hout);
}
/* Returns command_result if cmd was resolved, NULL if not yet called. */
static struct command_result *
send_payment(struct lightningd *ld,
@ -641,8 +657,6 @@ send_payment(struct lightningd *ld,
const char *b11str TAKES,
const struct secret *payment_secret)
{
const u8 *onion;
u8 sessionkey[32];
unsigned int base_expiry;
struct onionpacket *packet;
struct secret *path_secrets;
@ -751,19 +765,12 @@ send_payment(struct lightningd *ld,
return command_failed(cmd, data);
}
randombytes_buf(&sessionkey, sizeof(sessionkey));
/* Onion will carry us from first peer onwards. */
packet = create_onionpacket(tmpctx, path, &path_secrets);
onion = serialize_onionpacket(tmpctx, packet);
failcode = send_onion(ld, packet, &route[0], rhash, channel, &hout);
log_info(ld->log, "Sending %s over %zu hops to deliver %s",
type_to_string(tmpctx, struct amount_msat, &route[0].amount),
n_hops, type_to_string(tmpctx, struct amount_msat, &msat));
failcode = send_htlc_out(channel, route[0].amount,
base_expiry + route[0].delay,
rhash, onion, NULL, &hout);
if (failcode) {
fail = immediate_routing_failure(cmd, ld,
failcode,