public void Can_merkleize_attestion_data()
{
// arrange
AttestationData attestationData = new AttestationData(
Slot.One,
new CommitteeIndex(2),
new Root(Enumerable.Repeat((byte)0x12, 32).ToArray()),
new Checkpoint(
new Epoch(3),
new Root(Enumerable.Repeat((byte)0x34, 32).ToArray())
),
new Checkpoint(
new Epoch(4),
new Root(Enumerable.Repeat((byte)0x56, 32).ToArray())
)
);
// act
Merkleizer merklezier = new Merkleizer(0);
merklezier.Feed(attestationData);
UInt256 root = merklezier.CalculateRoot();
Span <byte> bytes = MemoryMarshal.Cast <UInt256, byte>(MemoryMarshal.CreateSpan(ref root, 1));
// assert
byte[] expected = HashUtility.Hash(
HashUtility.Hash(
HashUtility.Hash(
HashUtility.Chunk(new byte[] { 0x01 }), // slot
HashUtility.Chunk(new byte[] { 0x02 }) // committee
),
HashUtility.Hash(
Enumerable.Repeat((byte)0x12, 32).ToArray(), // beacon block root
HashUtility.Hash( // source
HashUtility.Chunk(new byte[] { 0x03 }),
Enumerable.Repeat((byte)0x34, 32).ToArray()
)
)
),
HashUtility.Merge(
HashUtility.Hash( // target
HashUtility.Chunk(new byte[] { 0x04 }),
Enumerable.Repeat((byte)0x56, 32).ToArray()
),
HashUtility.ZeroHashes(0, 2)
)
).ToArray();
bytes.ToArray().ShouldBe(expected);
}
public void Can_merkleize_epoch_1()
{
// arrange
Epoch epoch = Epoch.One;
// act
Merkleizer merklezier = new Merkleizer(0);
merklezier.Feed(epoch);
UInt256 root = merklezier.CalculateRoot();
Span <byte> bytes = MemoryMarshal.Cast <UInt256, byte>(MemoryMarshal.CreateSpan(ref root, 1));
// assert
byte[] expected = HashUtility.Chunk(new byte[] { 0x1 }).ToArray();
bytes.ToArray().ShouldBe(expected);
}