public void BasicAttestationEncode()
{
// Arrange
Attestation attestation = new Attestation(
new BitArray(new[] {
true, false, false, false, false, true, false, false,
true, true, false
}),
new AttestationData(
new Slot(2 * 8 + 5),
new CommitteeIndex(2),
new Root(Enumerable.Repeat((byte)0x12, 32).ToArray()),
new Checkpoint(
new Epoch(1),
new Root(Enumerable.Repeat((byte)0x34, 32).ToArray())
),
new Checkpoint(
new Epoch(2),
new Root(Enumerable.Repeat((byte)0x56, 32).ToArray())
)
),
new BlsSignature(Enumerable.Repeat((byte)0xef, 96).ToArray()));
// Act
Span <byte> encoded = new byte[Ssz.AttestationLength(attestation)];
Ssz.Encode(encoded, attestation);
// Assert
// Bitlist is little endian
// true, false, false, false, false, true, false, false, = 0b 0010 0001 = 0x 21
// true, true, false}), = 0b 0000 0011, add sentinel bit (so we know only 3 bits used) -> 0b 0000 1011 = 0x 0b
string expectedHex =
// static
"e4000000" + // aggregation dynamic offset 4 + 8+8+32+(8+32)+(8+32) + 96 = 228 = 0xe4
"1500000000000000" +
"0200000000000000" +
"1212121212121212121212121212121212121212121212121212121212121212" +
"0100000000000000" +
"3434343434343434343434343434343434343434343434343434343434343434" +
"0200000000000000" +
"5656565656565656565656565656565656565656565656565656565656565656" +
"efefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefef" +
// dynamic part
"210b";
encoded.ToHexString().ShouldBe(expectedHex);
}
public void Attestation_there_and_back()
{
AttestationData data = new AttestationData(
new Slot(1),
new CommitteeIndex(2),
Sha256.RootOfAnEmptyString,
new Checkpoint(new Epoch(1), Sha256.RootOfAnEmptyString),
new Checkpoint(new Epoch(2), Sha256.RootOfAnEmptyString));
Attestation container = new Attestation(
new BitArray(new byte[] { 1, 2, 3 }),
data,
TestSig1);
Span <byte> encoded = new byte[Ssz.AttestationLength(container)];
Ssz.Encode(encoded, container);
Attestation decoded = Ssz.DecodeAttestation(encoded);
Assert.AreEqual(container, decoded);
Merkle.Ize(out UInt256 root, container);
}