Function encode_n

common/bolt11.c:1005–1009

}

static void encode_n(u5 **data, const struct node_id *id)
{
	assert(node_id_valid(id));
	push_field(data, 'n', id->k, sizeof(id->k) * CHAR_BIT);
}

static void encode_x(u5 **data, u64 expiry)
{