Constant tox_packet::onion::ONION_RETURN_3_SIZE

pub const ONION_RETURN_3_SIZE: usize = secretbox::NONCEBYTES + SIZE_IPPORT + MACBYTES + ONION_RETURN_2_SIZE; // 0x0_000_000_000_000_0b1usize

Size of third OnionReturn struct with two inner OnionReturns.