public void InvalidSignature()
{
// Arrange
IServiceProvider testServiceProvider = TestSystem.BuildTestServiceProvider();
BeaconState state = TestState.PrepareTestState(testServiceProvider);
TimeParameters timeParameters = testServiceProvider.GetService <IOptions <TimeParameters> >().Value;
BeaconStateAccessor beaconStateAccessor = testServiceProvider.GetService <BeaconStateAccessor>();
// move state forward PERSISTENT_COMMITTEE_PERIOD epochs to allow for exit
ulong move = timeParameters.SlotsPerEpoch * (ulong)timeParameters.PersistentCommitteePeriod;
ulong newSlot = state.Slot + move;
state.SetSlot((Slot)newSlot);
Epoch currentEpoch = beaconStateAccessor.GetCurrentEpoch(state);
ValidatorIndex validatorIndex = beaconStateAccessor.GetActiveValidatorIndices(state, currentEpoch)[0];
Validator validator = state.Validators[(int)(ulong)validatorIndex];
var privateKey = TestKeys.PublicKeyToPrivateKey(validator.PublicKey, timeParameters);
VoluntaryExit voluntaryExit = TestVoluntaryExit.BuildVoluntaryExit(testServiceProvider, state, currentEpoch, validatorIndex, privateKey, signed: false);
RunVoluntaryExitProcessing(testServiceProvider, state, voluntaryExit, expectValid: false);
}
public void BasicGetCommitteeAssignment(ulong index, ulong slot, ulong committeeIndex)
{
// Arrange
IServiceCollection testServiceCollection = TestSystem.BuildTestServiceCollection(useStore: true);
testServiceCollection.AddSingleton <IHostEnvironment>(Substitute.For <IHostEnvironment>());
ServiceProvider testServiceProvider = testServiceCollection.BuildServiceProvider();
BeaconState state = TestState.PrepareTestState(testServiceProvider);
// Act
ValidatorAssignments validatorAssignments = testServiceProvider.GetService <ValidatorAssignments>();
ValidatorIndex validatorIndex = new ValidatorIndex(index);
CommitteeAssignment committeeAssignment = validatorAssignments.GetCommitteeAssignment(state, Epoch.Zero, validatorIndex);
// Assert
Console.WriteLine("Validator [{0}] {1} in slot {2} committee {3}",
validatorIndex, state.Validators[(int)validatorIndex].PublicKey, committeeAssignment.Slot, committeeAssignment.CommitteeIndex);
Slot expectedSlot = new Slot(slot);
CommitteeIndex expectedCommitteeIndex = new CommitteeIndex(committeeIndex);
committeeAssignment.Slot.ShouldBe(expectedSlot);
committeeAssignment.CommitteeIndex.ShouldBe(expectedCommitteeIndex);
}
/// <summary>
/// Slash the validator with index ``slashed_index``.
/// </summary>
public void SlashValidator(BeaconState state, ValidatorIndex slashedIndex, ValidatorIndex whistleblowerIndex)
{
var rewardsAndPenalties = _rewardsAndPenaltiesOptions.CurrentValue;
var stateListLengths = _stateListLengthOptions.CurrentValue;
var epoch = _beaconStateAccessor.GetCurrentEpoch(state);
InitiateValidatorExit(state, slashedIndex);
var validator = state.Validators[(int)(ulong)slashedIndex];
validator.SetSlashed();
var slashedWithdrawableEpoch = epoch + stateListLengths.EpochsPerSlashingsVector;
var withdrawableEpoch = Epoch.Max(validator.WithdrawableEpoch, slashedWithdrawableEpoch);
validator.SetWithdrawableEpoch(withdrawableEpoch);
var slashingsIndex = epoch % stateListLengths.EpochsPerSlashingsVector;
state.SetSlashings(slashingsIndex, validator.EffectiveBalance);
var slashingPenalty = validator.EffectiveBalance / rewardsAndPenalties.MinimumSlashingPenaltyQuotient;
DecreaseBalance(state, slashedIndex, slashingPenalty);
// Apply proposer and whistleblower rewards
var proposerIndex = _beaconStateAccessor.GetBeaconProposerIndex(state);
if (whistleblowerIndex == ValidatorIndex.None)
{
whistleblowerIndex = proposerIndex;
}
var whistleblowerReward = validator.EffectiveBalance / rewardsAndPenalties.WhistleblowerRewardQuotient;
var proposerReward = whistleblowerReward / rewardsAndPenalties.ProposerRewardQuotient;
IncreaseBalance(state, proposerIndex, proposerReward);
IncreaseBalance(state, whistleblowerIndex, whistleblowerReward - proposerReward);
}
/// <summary>
/// Return from ``indices`` a random index sampled by effective balance.
/// </summary>
public ValidatorIndex ComputeProposerIndex(BeaconState state, IList <ValidatorIndex> indices, Hash32 seed)
{
if (!indices.Any())
{
throw new ArgumentException("Indices can not be empty", nameof(indices));
}
const ulong maxRandomByte = (1 << 8) - 1;
var indexCount = (ulong)indices.Count();
var index = (ulong)0;
while (true)
{
var initialValidatorIndex = new ValidatorIndex(index % indexCount);
var shuffledIndex = ComputeShuffledIndex(initialValidatorIndex, indexCount, seed);
var candidateIndex = indices[(int)(ulong)shuffledIndex];
var randomInputBytes = new Span <byte>(new byte[40]);
seed.AsSpan().CopyTo(randomInputBytes);
BitConverter.TryWriteBytes(randomInputBytes.Slice(32), index / 32);
if (!BitConverter.IsLittleEndian)
{
randomInputBytes.Slice(32).Reverse();
}
var randomHash = _cryptographyService.Hash(randomInputBytes);
var random = randomHash.AsSpan()[(int)(index % 32)];
var effectiveBalance = state.Validators[(int)(ulong)candidateIndex].EffectiveBalance;
if ((effectiveBalance * maxRandomByte) >=
(_gweiValueOptions.CurrentValue.MaximumEffectiveBalance * random))
{
return(candidateIndex);
}
index++;
}
}
public DutyDetails(BlsPublicKey validatorPublicKey, ValidatorIndex validatorIndex)
{
ValidatorPublicKey = validatorPublicKey;
ValidatorIndex = validatorIndex;
}
// Run ``process_attester_slashing``, yielding:
// - pre-state('pre')
// - attester_slashing('attester_slashing')
// - post-state('post').
//If ``valid == False``, run expecting ``AssertionError``
private void RunAttesterSlashingProcessing(IServiceProvider testServiceProvider, BeaconState state, AttesterSlashing attesterSlashing, bool expectValid)
{
ChainConstants chainConstants = testServiceProvider.GetService <ChainConstants>();
StateListLengths stateListLengths = testServiceProvider.GetService <IOptions <StateListLengths> >().Value;
RewardsAndPenalties rewardsAndPenalties = testServiceProvider.GetService <IOptions <RewardsAndPenalties> >().Value;
BeaconStateAccessor beaconStateAccessor = testServiceProvider.GetService <BeaconStateAccessor>();
BeaconStateTransition beaconStateTransition = testServiceProvider.GetService <BeaconStateTransition>();
if (!expectValid)
{
Should.Throw <Exception>(() =>
{
beaconStateTransition.ProcessAttesterSlashing(state, attesterSlashing);
});
return;
}
var slashedIndices = attesterSlashing.Attestation1.CustodyBit0Indices
.Union(attesterSlashing.Attestation1.CustodyBit1Indices)
.ToList();
ValidatorIndex proposerIndex = beaconStateAccessor.GetBeaconProposerIndex(state);
Gwei preProposerBalance = TestState.GetBalance(state, proposerIndex);
var preSlashings = slashedIndices.ToDictionary(x => x, x => TestState.GetBalance(state, x));
var preWithdrawableEpochs = slashedIndices.ToDictionary(x => x, x => state.Validators[(int)(ulong)x].WithdrawableEpoch);
Gwei totalProposerRewards = preSlashings.Values.Aggregate(Gwei.Zero, (sum, x) => sum + x / rewardsAndPenalties.WhistleblowerRewardQuotient);
// Process slashing
beaconStateTransition.ProcessAttesterSlashing(state, attesterSlashing);
foreach (ValidatorIndex slashedIndex in slashedIndices)
{
Console.WriteLine($"Checking index {slashedIndex}");
Epoch preWithdrawableEpoch = preWithdrawableEpochs[slashedIndex];
Validator slashedValidator = state.Validators[(int)(ulong)slashedIndex];
// Check Slashing
slashedValidator.IsSlashed.ShouldBeTrue();
slashedValidator.ExitEpoch.ShouldBeLessThan(chainConstants.FarFutureEpoch);
if (preWithdrawableEpoch < chainConstants.FarFutureEpoch)
{
ulong slashingsEpoch = beaconStateAccessor.GetCurrentEpoch(state) + stateListLengths.EpochsPerSlashingsVector;
Epoch expectedWithdrawableEpoch = Epoch.Max(preWithdrawableEpoch, (Epoch)slashingsEpoch);
slashedValidator.WithdrawableEpoch.ShouldBe(expectedWithdrawableEpoch);
}
else
{
slashedValidator.WithdrawableEpoch.ShouldBeLessThan(chainConstants.FarFutureEpoch);
}
Gwei preSlashing = preSlashings[slashedIndex];
Gwei slashedBalance = TestState.GetBalance(state, slashedIndex);
slashedBalance.ShouldBeLessThan(preSlashing);
}
if (!slashedIndices.Contains(proposerIndex))
{
// gained whistleblower reward
Gwei expectedProposerBalance = preProposerBalance + totalProposerRewards;
Gwei proposerBalance = TestState.GetBalance(state, proposerIndex);
proposerBalance.ShouldBe(expectedProposerBalance);
}
else
{
// gained rewards for all slashings, which may include others. And only lost that of themselves.
Gwei expectedProposerBalance = preProposerBalance + totalProposerRewards
- (preSlashings[proposerIndex] / rewardsAndPenalties.MinimumSlashingPenaltyQuotient);
Gwei proposerBalance = TestState.GetBalance(state, proposerIndex);
proposerBalance.ShouldBe(expectedProposerBalance);
}
}
public static void Ize(out UInt256 root, ValidatorIndex container)
{
Ize(out root, container.Number);
}
public VoluntaryExit(Epoch epoch, ValidatorIndex validatorIndex, BlsSignature signature)
{
Epoch = epoch;
ValidatorIndex = validatorIndex;
Signature = signature;
}
private async Task <Duty> CheckHistoricalSlotsAsync(IStore store, IReadOnlyList <Root> historicalBlockRoots,
Slot fromSlot, Slot startSlot, ValidatorIndex validatorIndex, Duty duty)
{
TimeParameters timeParameters = _timeParameterOptions.CurrentValue;
Slot previousSlot = fromSlot;
while (true)
{
previousSlot -= Slot.One;
int index = (int)(previousSlot % timeParameters.SlotsPerHistoricalRoot);
Root previousRoot = historicalBlockRoots[index];
BeaconState previousState = await store.GetBlockStateAsync(previousRoot).ConfigureAwait(false);
duty = CheckStateDuty(previousState, validatorIndex, duty);
if (previousSlot <= startSlot ||
(duty.AttestationSlot != Slot.None && duty.BlockProposalSlot != Slot.None))
{
break;
}
}
return(duty);
}
public static VoluntaryExit BuildVoluntaryExit(IServiceProvider testServiceProvider, Epoch epoch, ValidatorIndex validatorIndex)
{
var voluntaryExit = new VoluntaryExit(epoch, validatorIndex);
return(voluntaryExit);
}
private static void Encode(Span <byte> span, ValidatorIndex value, ref int offset)
{
BinaryPrimitives.WriteUInt64LittleEndian(span.Slice(offset), value.Number);
offset += Ssz.ValidatorIndexLength;
}
public static void SignBlock(IServiceProvider testServiceProvider, BeaconState state, BeaconBlock block, ValidatorIndex proposerIndex)
{
var miscellaneousParameters = testServiceProvider.GetService <IOptions <MiscellaneousParameters> >().Value;
var timeParameters = testServiceProvider.GetService <IOptions <TimeParameters> >().Value;
var maxOperationsPerBlock = testServiceProvider.GetService <IOptions <MaxOperationsPerBlock> >().Value;
var signatureDomains = testServiceProvider.GetService <IOptions <SignatureDomains> >().Value;
var beaconChainUtility = testServiceProvider.GetService <BeaconChainUtility>();
var beaconStateAccessor = testServiceProvider.GetService <BeaconStateAccessor>();
var beaconStateTransition = testServiceProvider.GetService <BeaconStateTransition>();
if (state.Slot > block.Slot)
{
throw new ArgumentOutOfRangeException("block.Slot", block.Slot, $"Slot of block must be equal or less that state slot {state.Slot}");
}
var blockEpoch = beaconChainUtility.ComputeEpochAtSlot(block.Slot);
if (proposerIndex == ValidatorIndex.None)
{
if (block.Slot == state.Slot)
{
proposerIndex = beaconStateAccessor.GetBeaconProposerIndex(state);
}
else
{
var stateEpoch = beaconChainUtility.ComputeEpochAtSlot(state.Slot);
if (stateEpoch + 1 > blockEpoch)
{
Console.WriteLine("WARNING: Block slot far away, and no proposer index manually given."
+ " Signing block is slow due to transition for proposer index calculation.");
}
// use stub state to get proposer index of future slot
var stubState = BeaconState.Clone(state);
beaconStateTransition.ProcessSlots(stubState, block.Slot);
proposerIndex = beaconStateAccessor.GetBeaconProposerIndex(stubState);
}
}
var privateKeys = TestKeys.PrivateKeys(timeParameters).ToArray();
var privateKey = privateKeys[(int)(ulong)proposerIndex];
var randaoDomain = beaconStateAccessor.GetDomain(state, signatureDomains.Randao, blockEpoch);
var randaoRevealHash = blockEpoch.HashTreeRoot();
var randaoReveal = TestSecurity.BlsSign(randaoRevealHash, privateKey, randaoDomain);
block.Body.SetRandaoReveal(randaoReveal);
var signatureDomain = beaconStateAccessor.GetDomain(state, signatureDomains.BeaconProposer, blockEpoch);
var signingRoot = block.SigningRoot(miscellaneousParameters, maxOperationsPerBlock);
var signature = TestSecurity.BlsSign(signingRoot, privateKey, signatureDomain);
block.SetSignature(signature);
}
public bool TryGetLatestMessage(ValidatorIndex validatorIndex, out LatestMessage latestMessage) => _latestMessages.TryGetValue(validatorIndex, out latestMessage);
public void SetLatestMessage(ValidatorIndex validatorIndex, LatestMessage latestMessage) => _latestMessages[validatorIndex] = latestMessage;
/// <summary>
/// Prepare the state for the deposit, and create a deposit for the given validator, depositing the given amount.
/// </summary>
public static Deposit PrepareStateAndDeposit(IServiceProvider testServiceProvider, BeaconState state, ValidatorIndex validatorIndex, Gwei amount, Bytes32 withdrawalCredentials, bool signed)
{
ChainConstants chainConstants = testServiceProvider.GetService <ChainConstants>();
InitialValues initialValues = testServiceProvider.GetService <IOptions <InitialValues> >().Value;
TimeParameters timeParameters = testServiceProvider.GetService <IOptions <TimeParameters> >().Value;
IBeaconChainUtility beaconChainUtility = testServiceProvider.GetService <IBeaconChainUtility>();
BeaconStateAccessor beaconStateAccessor = testServiceProvider.GetService <BeaconStateAccessor>();
IDepositStore depositStore = testServiceProvider.GetService <IDepositStore>();
byte[][] privateKeys = TestKeys.PrivateKeys(timeParameters).ToArray();
BlsPublicKey[] publicKeys = TestKeys.PublicKeys(timeParameters).ToArray();
byte[] privateKey = privateKeys[(int)(ulong)validatorIndex];
BlsPublicKey publicKey = publicKeys[(int)(ulong)validatorIndex];
if (withdrawalCredentials == Bytes32.Zero)
{
// insecurely use pubkey as withdrawal key if no credentials provided
byte[] withdrawalCredentialBytes = TestSecurity.Hash(publicKey.AsSpan());
withdrawalCredentialBytes[0] = initialValues.BlsWithdrawalPrefix;
withdrawalCredentials = new Bytes32(withdrawalCredentialBytes);
}
DepositData depositData = BuildDeposit(testServiceProvider, state, publicKey, privateKey, amount, withdrawalCredentials, signed);
Deposit deposit = depositStore.Place(depositData);
state.SetEth1DepositIndex(0);
state.Eth1Data.SetDepositRoot(depositStore.DepositData.Root);
state.Eth1Data.SetDepositCount((ulong)depositStore.Deposits.Count);
return(deposit);
}
public void EffectiveBalanceHysteresis()
{
// Arrange
var testServiceProvider = TestSystem.BuildTestServiceProvider();
var state = TestState.PrepareTestState(testServiceProvider);
//# Prepare state up to the final-updates.
//# Then overwrite the balances, we only want to focus to be on the hysteresis based changes.
TestProcessUtility.RunEpochProcessingTo(testServiceProvider, state, TestProcessStep.ProcessFinalUpdates);
var gweiValues = testServiceProvider.GetService <IOptions <GweiValues> >().Value;
var beaconChainUtility = testServiceProvider.GetService <BeaconChainUtility>();
var beaconStateAccessor = testServiceProvider.GetService <BeaconStateAccessor>();
var beaconStateTransition = testServiceProvider.GetService <BeaconStateTransition>();
// Set some edge cases for balances
var maximum = gweiValues.MaximumEffectiveBalance;
var minimum = gweiValues.EjectionBalance;
var increment = gweiValues.EffectiveBalanceIncrement;
var halfIncrement = increment / 2;
var testCases = new[] {
new EffectiveBalanceCase(maximum, maximum, maximum, "as-is"),
new EffectiveBalanceCase(maximum, (Gwei)(maximum - 1), maximum - increment, "round down, step lower"),
new EffectiveBalanceCase(maximum, (Gwei)(maximum + 1), maximum, "round down"),
new EffectiveBalanceCase(maximum, (Gwei)(maximum - increment), maximum - increment, "exactly 1 step lower"),
new EffectiveBalanceCase(maximum, (Gwei)(maximum - increment - 1), maximum - (increment * 2), "just 1 over 1 step lower"),
new EffectiveBalanceCase(maximum, (Gwei)(maximum - increment + 1), maximum - increment, "close to 1 step lower"),
new EffectiveBalanceCase(minimum, (Gwei)(minimum + (halfIncrement * 3)), minimum, "bigger balance, but not high enough"),
new EffectiveBalanceCase(minimum, (Gwei)(minimum + (halfIncrement * 3) + 1), minimum + increment, "bigger balance, high enough, but small step"),
new EffectiveBalanceCase(minimum, (Gwei)(minimum + (halfIncrement * 4) - 1), minimum + increment, "bigger balance, high enough, close to double step"),
new EffectiveBalanceCase(minimum, (Gwei)(minimum + (halfIncrement * 4)), minimum + (increment * 2), "exact two step balance increment"),
new EffectiveBalanceCase(minimum, (Gwei)(minimum + (halfIncrement * 4) + 1), minimum + (increment * 2), "over two steps, round down"),
};
var currentEpoch = beaconStateAccessor.GetCurrentEpoch(state);
for (var index = 0; index < testCases.Length; index++)
{
var validator = state.Validators[index];
var isActive = beaconChainUtility.IsActiveValidator(validator, currentEpoch);
isActive.ShouldBeTrue();
var testCase = testCases[index];
validator.SetEffectiveBalance(testCase.PreEffective);
var validatorIndex = new ValidatorIndex((ulong)index);
state.SetBalance(validatorIndex, testCase.Balance);
}
// Act
beaconStateTransition.ProcessFinalUpdates(state);
// Assert
for (var index = 0; index < testCases.Length; index++)
{
var testCase = testCases[index];
var validator = state.Validators[index];
validator.EffectiveBalance.ShouldBe(testCase.PostEffective, testCase.Name);
}
}
/// <summary>
/// Prepare the state for the deposit, and create a deposit for the given validator, depositing the given amount.
/// </summary>
public static Deposit PrepareStateAndDeposit(IServiceProvider testServiceProvider, BeaconState state, ValidatorIndex validatorIndex, Gwei amount, Hash32 withdrawalCredentials, bool signed)
{
var chainConstants = testServiceProvider.GetService <ChainConstants>();
var initialValues = testServiceProvider.GetService <IOptions <InitialValues> >().Value;
var timeParameters = testServiceProvider.GetService <IOptions <TimeParameters> >().Value;
var beaconChainUtility = testServiceProvider.GetService <BeaconChainUtility>();
var beaconStateAccessor = testServiceProvider.GetService <BeaconStateAccessor>();
var privateKeys = TestKeys.PrivateKeys(timeParameters).ToArray();
var publicKeys = TestKeys.PublicKeys(timeParameters).ToArray();
var privateKey = privateKeys[(int)(ulong)validatorIndex];
var publicKey = publicKeys[(int)(ulong)validatorIndex];
if (withdrawalCredentials == Hash32.Zero)
{
// insecurely use pubkey as withdrawal key if no credentials provided
var withdrawalCredentialBytes = TestSecurity.Hash(publicKey.AsSpan());
withdrawalCredentialBytes[0] = initialValues.BlsWithdrawalPrefix;
withdrawalCredentials = new Hash32(withdrawalCredentialBytes);
}
var depositDataList = new List <DepositData>();
(var deposit, var depositRoot) = BuildDeposit(testServiceProvider, state, depositDataList, publicKey, privateKey, amount, withdrawalCredentials, signed);
state.SetEth1DepositIndex(0);
state.Eth1Data.SetDepositRoot(depositRoot);
state.Eth1Data.SetDepositCount((ulong)depositDataList.Count);
return(deposit);
}
public static void Encode(Span <byte> span, ValidatorIndex value)
{
Encode(span, value.Number);
}
public async Task <ValidatorDuty> GetValidatorDutyAsync(BlsPublicKey validatorPublicKey, Epoch epoch)
{
Root head = await _forkChoice.GetHeadAsync(_store).ConfigureAwait(false);
BeaconState headState = await _store.GetBlockStateAsync(head).ConfigureAwait(false);
Epoch currentEpoch = _beaconStateAccessor.GetCurrentEpoch(headState);
Epoch nextEpoch = currentEpoch + Epoch.One;
if (epoch == Epoch.None)
{
epoch = currentEpoch;
}
else if (epoch > nextEpoch)
{
throw new ArgumentOutOfRangeException(nameof(epoch), epoch,
$"Duties cannot look ahead more than the next epoch {nextEpoch}.");
}
TimeParameters timeParameters = _timeParameterOptions.CurrentValue;
Slot startSlot = _beaconChainUtility.ComputeStartSlotOfEpoch(epoch);
Slot endSlot = startSlot + new Slot(timeParameters.SlotsPerEpoch);
Duty duty = new Duty()
{
AttestationSlot = Slot.None,
AttestationCommitteeIndex = CommitteeIndex.None,
BlockProposalSlot = Slot.None
};
if (epoch == nextEpoch)
{
// Clone for next or current, so that it can be safely mutated (transitioned forward)
BeaconState state = BeaconState.Clone(headState);
_beaconStateTransition.ProcessSlots(state, startSlot);
// Check base state
ValidatorIndex validatorIndex = CheckValidatorIndex(state, validatorPublicKey);
duty = CheckStateDuty(state, validatorIndex, duty);
// Check future states
duty = CheckFutureSlots(state, endSlot, validatorIndex, duty);
}
else if (epoch == currentEpoch)
{
// Take block slot and roots before cloning (for historical checks)
IReadOnlyList <Root> historicalBlockRoots = headState.BlockRoots;
Slot fromSlot = headState.Slot;
BeaconState state = BeaconState.Clone(headState);
// Check base state
ValidatorIndex validatorIndex = CheckValidatorIndex(state, validatorPublicKey);
duty = CheckStateDuty(state, validatorIndex, duty);
// Check future states
duty = CheckFutureSlots(state, endSlot, validatorIndex, duty);
// Check historical states
if (startSlot < fromSlot && (duty.AttestationSlot == Slot.None || duty.BlockProposalSlot == Slot.None))
{
duty = await CheckHistoricalSlotsAsync(_store, historicalBlockRoots, fromSlot, startSlot,
validatorIndex, duty).ConfigureAwait(false);
}
}
else
{
Root endRoot = await _forkChoice.GetAncestorAsync(_store, head, endSlot - Slot.One);
BeaconState state = await _store.GetBlockStateAsync(endRoot).ConfigureAwait(false);
// Check base state
ValidatorIndex validatorIndex = CheckValidatorIndex(state, validatorPublicKey);
duty = CheckStateDuty(state, validatorIndex, duty);
// Check historical states
IReadOnlyList <Root> historicalBlockRoots = state.BlockRoots;
if (duty.AttestationSlot == Slot.None || duty.BlockProposalSlot == Slot.None)
{
Slot fromSlot = state.Slot;
duty = await CheckHistoricalSlotsAsync(_store, historicalBlockRoots, fromSlot, startSlot,
validatorIndex, duty).ConfigureAwait(false);
}
}
// HACK: Shards were removed from Phase 0, but analogy is committee index, so use for initial testing.
Shard attestationShard = new Shard((ulong)duty.AttestationCommitteeIndex);
ValidatorDuty validatorDuty =
new ValidatorDuty(validatorPublicKey, duty.AttestationSlot, attestationShard, duty.BlockProposalSlot);
return(validatorDuty);
}
public void SetBalance(ValidatorIndex validatorIndex, Gwei balance) => _balances[(int)validatorIndex] = balance;
public static Gwei GetBalance(BeaconState state, ValidatorIndex proposerIndex)
{
return(state.Balances[(int)(ulong)proposerIndex]);
}
public static VoluntaryExit BuildVoluntaryExit(IServiceProvider testServiceProvider, BeaconState state, Epoch epoch, ValidatorIndex validatorIndex, byte[] privateKey, bool signed)
{
var voluntaryExit = new VoluntaryExit(epoch, validatorIndex, BlsSignature.Empty);
if (signed)
{
SignVoluntaryExit(testServiceProvider, state, voluntaryExit, privateKey);
}
return(voluntaryExit);
}
public static SszElement ToSszBasicElement(this ValidatorIndex item)
{
return(new SszBasicElement((ulong)item));
}
public static SignedBeaconBlock SignBlock(IServiceProvider testServiceProvider, BeaconState state, BeaconBlock block, ValidatorIndex proposerIndex)
{
TimeParameters timeParameters = testServiceProvider.GetService <IOptions <TimeParameters> >().Value;
SignatureDomains signatureDomains = testServiceProvider.GetService <IOptions <SignatureDomains> >().Value;
ICryptographyService cryptographyService = testServiceProvider.GetService <ICryptographyService>();
BeaconChainUtility beaconChainUtility = testServiceProvider.GetService <BeaconChainUtility>();
BeaconStateAccessor beaconStateAccessor = testServiceProvider.GetService <BeaconStateAccessor>();
BeaconStateTransition beaconStateTransition = testServiceProvider.GetService <BeaconStateTransition>();
if (state.Slot > block.Slot)
{
throw new ArgumentOutOfRangeException("block.Slot", block.Slot, $"Slot of block must be equal or less that state slot {state.Slot}");
}
Epoch blockEpoch = beaconChainUtility.ComputeEpochAtSlot(block.Slot);
if (proposerIndex == ValidatorIndex.None)
{
if (block.Slot == state.Slot)
{
proposerIndex = beaconStateAccessor.GetBeaconProposerIndex(state);
}
else
{
Epoch stateEpoch = beaconChainUtility.ComputeEpochAtSlot(state.Slot);
if (stateEpoch + 1 > blockEpoch)
{
Console.WriteLine("WARNING: Block slot far away, and no proposer index manually given."
+ " Signing block is slow due to transition for proposer index calculation.");
}
// use stub state to get proposer index of future slot
BeaconState stubState = BeaconState.Clone(state);
beaconStateTransition.ProcessSlots(stubState, block.Slot);
proposerIndex = beaconStateAccessor.GetBeaconProposerIndex(stubState);
}
}
byte[][] privateKeys = TestKeys.PrivateKeys(timeParameters).ToArray();
byte[] privateKey = privateKeys[(int)(ulong)proposerIndex];
Root blockHashTreeRoot = cryptographyService.HashTreeRoot(block);
Domain proposerDomain = beaconStateAccessor.GetDomain(state, signatureDomains.BeaconProposer, blockEpoch);
Root signingRoot = beaconChainUtility.ComputeSigningRoot(blockHashTreeRoot, proposerDomain);
BlsSignature signature = TestSecurity.BlsSign(signingRoot, privateKey);
return(new SignedBeaconBlock(block, signature));
}
public Task SetLatestMessageAsync(ValidatorIndex validatorIndex, LatestMessage latestMessage)
{
_latestMessages[validatorIndex] = latestMessage;
return(Task.CompletedTask);
}
// Run ``process_deposit``, yielding:
// - pre-state('pre')
// - deposit('deposit')
// - post-state('post').
//If ``valid == False``, run expecting ``AssertionError``
private void RunDepositProcessing(IServiceProvider testServiceProvider, BeaconState state, Deposit deposit, ValidatorIndex validatorIndex, bool expectValid, bool effective)
{
GweiValues gweiValues = testServiceProvider.GetService <IOptions <GweiValues> >().Value;
BeaconStateTransition beaconStateTransition = testServiceProvider.GetService <BeaconStateTransition>();
int preValidatorCount = state.Validators.Count;
Gwei preBalance = Gwei.Zero;
if ((int)(ulong)validatorIndex < preValidatorCount)
{
preBalance = TestState.GetBalance(state, validatorIndex);
}
if (!expectValid)
{
Should.Throw <Exception>(() =>
{
beaconStateTransition.ProcessDeposit(state, deposit);
});
return;
}
beaconStateTransition.ProcessDeposit(state, deposit);
if (!effective)
{
state.Validators.Count.ShouldBe(preValidatorCount);
state.Balances.Count.ShouldBe(preValidatorCount);
if ((int)(ulong)validatorIndex < preValidatorCount)
{
Gwei balance = TestState.GetBalance(state, validatorIndex);
balance.ShouldBe(preBalance);
}
}
else
{
if ((int)(ulong)validatorIndex < preValidatorCount)
{
// top up
state.Validators.Count.ShouldBe(preValidatorCount);
state.Balances.Count.ShouldBe(preValidatorCount);
}
else
{
// new validator
state.Validators.Count.ShouldBe(preValidatorCount + 1);
state.Balances.Count.ShouldBe(preValidatorCount + 1);
}
Gwei balance = TestState.GetBalance(state, validatorIndex);
Gwei expectedBalance = preBalance + deposit.Data.Item.Amount;
balance.ShouldBe(expectedBalance);
Gwei expectedEffectiveBalance = Gwei.Min(gweiValues.MaximumEffectiveBalance, expectedBalance);
expectedEffectiveBalance -= expectedEffectiveBalance % gweiValues.EffectiveBalanceIncrement;
state.Validators[(int)(ulong)validatorIndex].EffectiveBalance.ShouldBe(expectedEffectiveBalance);
}
state.Eth1DepositIndex.ShouldBe(state.Eth1Data.DepositCount);
}
public bool IsProposer(BeaconState state, ValidatorIndex validatorIndex)
{
ValidatorIndex stateProposerIndex = _beaconStateAccessor.GetBeaconProposerIndex(state);
return(stateProposerIndex.Equals(validatorIndex));
}
public async Task <ValidatorDuty> GetValidatorDutyAsync(BlsPublicKey validatorPublicKey, Epoch epoch)
{
if (!_storeProvider.TryGetStore(out IStore? retrievedStore))
{
throw new Exception("Beacon chain is currently syncing or waiting for genesis.");
}
IStore store = retrievedStore !;
Hash32 head = await _forkChoice.GetHeadAsync(store);
if (!store.TryGetBlockState(head, out BeaconState? headState))
{
throw new Exception($"Head state {head} not found.");
}
Epoch currentEpoch = _beaconStateAccessor.GetCurrentEpoch(headState !);
Epoch nextEpoch = currentEpoch + Epoch.One;
if (epoch == Epoch.None)
{
epoch = currentEpoch;
}
else if (epoch > nextEpoch)
{
throw new ArgumentOutOfRangeException(nameof(epoch), epoch,
$"Duties cannot look ahead more than the next epoch {nextEpoch}.");
}
TimeParameters timeParameters = _timeParameterOptions.CurrentValue;
Slot startSlot = _beaconChainUtility.ComputeStartSlotOfEpoch(epoch);
Slot endSlot = startSlot + new Slot(timeParameters.SlotsPerEpoch);
Slot attestationSlot = Slot.None;
CommitteeIndex attestationCommitteeIndex = CommitteeIndex.None;
Slot blockProposalSlot = Slot.None;
if (epoch == nextEpoch)
{
// Clone for next or current, so that it can be safely mutated (transitioned forward)
BeaconState state = BeaconState.Clone(headState !);
_beaconStateTransition.ProcessSlots(state, startSlot);
// Check base state
ValidatorIndex validatorIndex = CheckValidatorIndex(state, validatorPublicKey);
CheckStateDuty(state, validatorIndex, ref attestationSlot, ref attestationCommitteeIndex, ref blockProposalSlot);
// Check future states
CheckFutureSlots(state, endSlot, validatorIndex, ref attestationSlot, ref attestationCommitteeIndex, ref blockProposalSlot);
}
else if (epoch == currentEpoch)
{
// Take block slot and roots before cloning (for historical checks)
IReadOnlyList <Hash32> historicalBlockRoots = headState !.BlockRoots;
Slot fromSlot = headState !.Slot;
BeaconState state = BeaconState.Clone(headState !);
// Check base state
ValidatorIndex validatorIndex = CheckValidatorIndex(state, validatorPublicKey);
CheckStateDuty(state, validatorIndex, ref attestationSlot, ref attestationCommitteeIndex, ref blockProposalSlot);
// Check future states
CheckFutureSlots(state, endSlot, validatorIndex, ref attestationSlot, ref attestationCommitteeIndex,
ref blockProposalSlot);
// Check historical states
if (startSlot < fromSlot && (attestationSlot == Slot.None || blockProposalSlot == Slot.None))
{
CheckHistoricalSlots(store, historicalBlockRoots, fromSlot, startSlot, validatorIndex,
ref attestationSlot, ref attestationCommitteeIndex, ref blockProposalSlot);
}
}
else
{
Hash32 endRoot = _forkChoice.GetAncestor(store, head, endSlot - Slot.One);
if (!store.TryGetBlockState(endRoot, out BeaconState? endState))
{
throw new Exception($"State {endRoot} for slot {endSlot} not found.");
}
BeaconState state = endState !;
// Check base state
ValidatorIndex validatorIndex = CheckValidatorIndex(state, validatorPublicKey);
CheckStateDuty(state, validatorIndex, ref attestationSlot, ref attestationCommitteeIndex, ref blockProposalSlot);
// Check historical states
IReadOnlyList <Hash32> historicalBlockRoots = state.BlockRoots;
Slot fromSlot = state.Slot;
if (attestationSlot == Slot.None || blockProposalSlot == Slot.None)
{
CheckHistoricalSlots(store, historicalBlockRoots, fromSlot, startSlot, validatorIndex,
ref attestationSlot, ref attestationCommitteeIndex, ref blockProposalSlot);
}
}
// HACK: Shards were removed from Phase 0, but analogy is committee index, so use for initial testing.
Shard attestationShard = new Shard((ulong)attestationCommitteeIndex);
ValidatorDuty validatorDuty =
new ValidatorDuty(validatorPublicKey, attestationSlot, attestationShard, blockProposalSlot);
return(validatorDuty);
}
/// <summary>
/// Return the committee assignment in the ``epoch`` for ``validator_index``.
/// ``assignment`` returned is a tuple of the following form:
/// * ``assignment[0]`` is the list of validators in the committee
/// * ``assignment[1]`` is the index to which the committee is assigned
/// * ``assignment[2]`` is the slot at which the committee is assigned
/// Return None if no assignment.
/// </summary>
public CommitteeAssignment GetCommitteeAssignment(BeaconState state, Epoch epoch, ValidatorIndex validatorIndex)
{
Epoch nextEpoch = _beaconStateAccessor.GetCurrentEpoch(state) + Epoch.One;
if (epoch > nextEpoch)
{
throw new ArgumentOutOfRangeException(nameof(epoch), epoch,
$"Committee epoch cannot be greater than next epoch {nextEpoch}.");
}
TimeParameters timeParameters = _timeParameterOptions.CurrentValue;
Slot startSlot = _beaconChainUtility.ComputeStartSlotOfEpoch(epoch);
ulong endSlot = startSlot + timeParameters.SlotsPerEpoch;
for (Slot slot = startSlot; slot < endSlot; slot += Slot.One)
{
ulong committeeCount = _beaconStateAccessor.GetCommitteeCountAtSlot(state, slot);
for (CommitteeIndex index = CommitteeIndex.Zero;
index < new CommitteeIndex(committeeCount);
index += CommitteeIndex.One)
{
IReadOnlyList <ValidatorIndex> committee =
_beaconStateAccessor.GetBeaconCommittee(state, slot, index);
if (committee.Contains(validatorIndex))
{
CommitteeAssignment committeeAssignment = new CommitteeAssignment(committee, index, slot);
return(committeeAssignment);
}
}
}
return(CommitteeAssignment.None);
}
private void CheckHistoricalSlots(IStore store, IReadOnlyList <Hash32> historicalBlockRoots, Slot fromSlot, Slot startSlot, ValidatorIndex validatorIndex,
ref Slot attestationSlot, ref CommitteeIndex attestationCommitteeIndex, ref Slot blockProposalSlot)
{
TimeParameters timeParameters = _timeParameterOptions.CurrentValue;
Slot previousSlot = fromSlot;
while (true)
{
previousSlot -= Slot.One;
int index = (int)(previousSlot % timeParameters.SlotsPerHistoricalRoot);
Hash32 previousRoot = historicalBlockRoots[index];
if (!store.TryGetBlockState(previousRoot, out BeaconState? previousState))
{
throw new Exception($"Historical state {previousRoot} for slot {previousSlot} not found.");
}
CheckStateDuty(previousState !, validatorIndex, ref attestationSlot, ref attestationCommitteeIndex,
ref blockProposalSlot);
if (previousSlot <= startSlot || (attestationSlot != Slot.None && blockProposalSlot != Slot.None))
{
break;
}
}
}
