Function send_payment_core

lightningd/pay.c:1073–1180

destination/route_channels/route_nodes are NULL (and path_secrets may be NULL) * if we're sending a raw onion. */

/* destination/route_channels/route_nodes are NULL (and path_secrets may be NULL)
 * if we're sending a raw onion. */
static struct command_result *
send_payment_core(struct lightningd *ld,
		  struct command *cmd,
		  const struct sha256 *rhash,
		  u64 partid,
		  u64 group,
		  const struct route_hop *first_hop,
		  struct amount_msat msat,
		  struct amount_msat total_msat,
		  const char *label TAKES,
		  const char *invstring TAKES,
		  const char *description TAKES,
		  const struct onionpacket *packet,
		  const struct node_id *destination,
		  struct node_id *route_nodes TAKES,
		  struct short_channel_id *route_channels TAKES,
		  struct secret *path_secrets,
		  const struct sha256 *local_invreq_id)
{
	struct channel *channel;
	const u8 *failmsg;
	struct htlc_out *hout;
	struct routing_failure *fail;
	struct command_result *ret;
	const struct wallet_payment *payment;

	/* Reconcile this with previous attempts */
	ret = check_progress(ld, cmd, rhash, msat, total_msat, partid, group,
			     destination, &payment);
	if (ret)
		return ret;

	/* Previous payment success is defined to be idempotent */
	if (payment)
		return sendpay_success(cmd, payment, NULL);

	ret = check_invoice_request_usage(cmd, local_invreq_id);
	if (ret)
		return ret;

	channel = find_channel_for_htlc_add(ld, cmd, &first_hop->node_id,
					    first_hop->scid, &msat);
	if (!channel) {
		struct json_stream *data
			= json_stream_fail(cmd, PAY_TRY_OTHER_ROUTE,
					   "No connection to first "
					   "peer found");

		json_add_routefail_info(data, 0, WIRE_UNKNOWN_NEXT_PEER,
					&ld->our_nodeid, NULL,
					node_id_idx(&ld->our_nodeid,
						    &first_hop->node_id),
					NULL);
		json_object_end(data);
		return command_failed(cmd, data);
	}

	if (route_channels)