public void Checkpoint_there_and_back()
{
Checkpoint container = new Checkpoint(new Epoch(1), Sha256.OfAnEmptyString);
Span <byte> encoded = new byte[Checkpoint.SszLength];
Ssz.Encode(encoded, container);
Checkpoint decoded = Ssz.DecodeCheckpoint(encoded);
Assert.AreEqual(container, decoded);
Merkle.Ize(out UInt256 root, container);
}