// ReSharper disable once InconsistentNaming
// ReSharper disable once IdentifierTypo
public async Task <IActionResult> GetAsync([FromQuery] byte[] validator_pubkey, [FromQuery] uint poc_bit,
[FromQuery] ulong slot, [FromQuery] ulong index,
CancellationToken cancellationToken)
{
if (_logger.IsDebug())
{
LogDebug.NewAttestationRequested(_logger, slot, index, Bytes.ToHexString(validator_pubkey), null);
}
BlsPublicKey validatorPublicKey = new BlsPublicKey(validator_pubkey);
bool proofOfCustodyBit = poc_bit > 0;
Slot targetSlot = new Slot(slot);
// NOTE: Spec 0.10.1 still has old Shard references in OAPI, although the spec has changed to Index;
// use Index as it is easier to understand (i.e. the spec OAPI in 0.10.1 is wrong)
CommitteeIndex targetIndex = new CommitteeIndex(index);
ApiResponse <Attestation> apiResponse =
await _beaconNode
.NewAttestationAsync(validatorPublicKey, proofOfCustodyBit, targetSlot, targetIndex,
cancellationToken).ConfigureAwait(false);
return(apiResponse.StatusCode switch
{
Core2.Api.StatusCode.Success => Ok(apiResponse.Content),
Core2.Api.StatusCode.InvalidRequest => Problem("Invalid request syntax.",
statusCode: (int)apiResponse.StatusCode),
Core2.Api.StatusCode.CurrentlySyncing => Problem("Beacon node is currently syncing, try again later.",
statusCode: (int)apiResponse.StatusCode),
_ => Problem("Beacon node internal error.", statusCode: (int)apiResponse.StatusCode)
});
private static CommitteeIndex DecodeCommitteeIndex(ReadOnlySpan <byte> span, ref int offset)
{
CommitteeIndex committeeIndex = new CommitteeIndex(BinaryPrimitives.ReadUInt64LittleEndian(span.Slice(offset, Ssz.CommitteeIndexLength))); BinaryPrimitives.ReadUInt64LittleEndian(span.Slice(offset, Ssz.CommitteeIndexLength));
offset += Ssz.CommitteeIndexLength;
return(committeeIndex);
}
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;
}
}
}
// def get_valid_attestation(spec, state, slot=None, index=None, signed=False):
public static Attestation GetValidAttestation(IServiceProvider testServiceProvider, BeaconState state, Slot slot, CommitteeIndex index, bool signed)
{
var beaconStateAccessor = testServiceProvider.GetService <BeaconStateAccessor>();
if (slot == Slot.None)
{
slot = state.Slot;
}
if (index == CommitteeIndex.None)
{
index = new CommitteeIndex(0);
}
var attestationData = BuildAttestationData(testServiceProvider, state, slot, index);
var beaconCommittee = beaconStateAccessor.GetBeaconCommittee(state, attestationData.Slot, attestationData.Index);
var committeeSize = beaconCommittee.Count;
var aggregationBits = new BitArray(committeeSize);
var custodyBits = new BitArray(committeeSize);
var attestation = new Attestation(aggregationBits, attestationData, custodyBits, BlsSignature.Empty);
FillAggregateAttestation(state, attestation, beaconStateAccessor);
if (signed)
{
SignAttestation(testServiceProvider, state, attestation);
}
return(attestation);
}
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);
committeeAssignment.ShouldNotBe(CommitteeAssignment.None);
committeeAssignment.Committee.Count.ShouldBeGreaterThan(0);
Slot expectedSlot = new Slot(slot);
CommitteeIndex expectedCommitteeIndex = new CommitteeIndex(committeeIndex);
committeeAssignment.Slot.ShouldBe(expectedSlot);
committeeAssignment.CommitteeIndex.ShouldBe(expectedCommitteeIndex);
}
// def get_valid_attestation(spec, state, slot=None, index=None, signed=False):
public static Attestation GetValidAttestation(IServiceProvider testServiceProvider, BeaconState state, Slot slot, CommitteeIndex index, bool signed)
{
BeaconStateAccessor beaconStateAccessor = testServiceProvider.GetService <BeaconStateAccessor>();
if (slot == Slot.None)
{
slot = state.Slot;
}
if (index == CommitteeIndex.None)
{
index = new CommitteeIndex(0);
}
AttestationData attestationData = BuildAttestationData(testServiceProvider, state, slot, index);
IReadOnlyList <ValidatorIndex> beaconCommittee = beaconStateAccessor.GetBeaconCommittee(state, attestationData.Slot, attestationData.Index);
int committeeSize = beaconCommittee.Count;
BitArray aggregationBits = new BitArray(committeeSize);
Attestation attestation = new Attestation(aggregationBits, attestationData, BlsSignature.Zero);
FillAggregateAttestation(state, attestation, beaconStateAccessor);
if (signed)
{
SignAttestation(testServiceProvider, state, attestation);
}
return(attestation);
}
private void UpdateDutyDetailsForState(IList <DutyDetails> dutyDetailsList, BeaconState state)
{
// check attestation
ulong committeeCount = _beaconStateAccessor.GetCommitteeCountAtSlot(state, state.Slot);
for (CommitteeIndex index = CommitteeIndex.Zero;
index < new CommitteeIndex(committeeCount);
index += CommitteeIndex.One)
{
IReadOnlyList <ValidatorIndex> committee =
_beaconStateAccessor.GetBeaconCommittee(state, state.Slot, index);
foreach (DutyDetails dutyDetails in dutyDetailsList)
{
if (!dutyDetails.AttestationSlot.HasValue && committee.Contains(dutyDetails.ValidatorIndex))
{
dutyDetails.AttestationSlot = state.Slot;
dutyDetails.AttestationCommitteeIndex = index;
}
}
}
// check proposer
foreach (DutyDetails dutyDetails in dutyDetailsList)
{
if (!dutyDetails.BlockProposalSlot.HasValue)
{
bool isProposer = IsProposer(state, dutyDetails.ValidatorIndex);
if (isProposer)
{
dutyDetails.BlockProposalSlot = state.Slot;
}
}
}
}
private Duty CheckStateDuty(BeaconState state, ValidatorIndex validatorIndex, Duty duty)
{
// check attestation
if (duty.AttestationSlot == Slot.None)
{
ulong committeeCount = _beaconStateAccessor.GetCommitteeCountAtSlot(state, state.Slot);
for (CommitteeIndex index = CommitteeIndex.Zero;
index < new CommitteeIndex(committeeCount);
index += CommitteeIndex.One)
{
IReadOnlyList <ValidatorIndex> committee =
_beaconStateAccessor.GetBeaconCommittee(state, state.Slot, index);
if (committee.Contains(validatorIndex))
{
duty.AttestationSlot = state.Slot;
duty.AttestationCommitteeIndex = index;
}
}
}
// check proposer
if (duty.BlockProposalSlot == Slot.None)
{
bool isProposer = IsProposer(state, validatorIndex);
if (isProposer)
{
duty.BlockProposalSlot = state.Slot;
}
}
return(duty);
}
/// <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 static AttestationData DecodeAttestationData(ReadOnlySpan <byte> span, ref int offset)
{
Slot slot = DecodeSlot(span, ref offset);
CommitteeIndex index = DecodeCommitteeIndex(span, ref offset);
Root beaconBlockRoot = DecodeRoot(span, ref offset);
Checkpoint source = DecodeCheckpoint(span, ref offset);
Checkpoint target = DecodeCheckpoint(span, ref offset);
AttestationData container = new AttestationData(slot, index, beaconBlockRoot, source, target);
return(container);
}
private void CheckFutureSlots(BeaconState state, Slot endSlot, ValidatorIndex validatorIndex,
ref Slot attestationSlot, ref CommitteeIndex attestationCommitteeIndex, ref Slot blockProposalSlot)
{
Slot nextSlot = state.Slot + Slot.One;
while (nextSlot < endSlot && (attestationSlot == Slot.None || blockProposalSlot == Slot.None))
{
_beaconStateTransition.ProcessSlots(state, nextSlot);
CheckStateDuty(state, validatorIndex, ref attestationSlot, ref attestationCommitteeIndex, ref blockProposalSlot);
nextSlot += Slot.One;
}
}
public AttestationData(
Slot slot,
CommitteeIndex index,
Hash32 beaconBlockRoot,
Checkpoint source,
Checkpoint target)
{
BeaconBlockRoot = beaconBlockRoot;
Source = source;
Target = target;
Slot = slot;
Index = index;
}
public async Task <Attestation> NewAttestationAsync(BlsPublicKey validatorPublicKey,
bool proofOfCustodyBit, Slot slot, CommitteeIndex index,
CancellationToken cancellationToken)
{
Root head = await _store.GetHeadAsync().ConfigureAwait(false);
BeaconBlock headBlock = (await _store.GetSignedBlockAsync(head).ConfigureAwait(false)).Message;
BeaconState parentState = await _store.GetBlockStateAsync(head).ConfigureAwait(false);
// Clone state (will mutate) and process outstanding slots
BeaconState headState = BeaconState.Clone(parentState);
_beaconStateTransition.ProcessSlots(headState, slot);
// Set attestation_data.index = index where index is the index associated with the validator's committee.
ValidatorIndex?validatorIndex = FindValidatorIndexByPublicKey(headState, validatorPublicKey);
if (validatorIndex == null)
{
throw new Exception($"Can not find validator index for public key {validatorPublicKey}");
}
// TODO: May need a more efficient way to try and find the committee and position within the committee.
// Some of this may already be cached in Validator Assignments (generally stable for an epoch),
// but not with the index within the committee. Easy enough to extend and use the same cache.
IReadOnlyList <ValidatorIndex> committee =
_beaconStateAccessor.GetBeaconCommittee(headState, headState.Slot, index);
int committeeSize = committee.Count;
int?committeeMemberIndexOfValidator = null;
for (int committeeMemberIndex = 0; committeeMemberIndex < committee.Count; committeeMemberIndex++)
{
if (committee[committeeMemberIndex] == validatorIndex)
{
committeeMemberIndexOfValidator = committeeMemberIndex;
break;
}
}
if (committeeMemberIndexOfValidator == null)
{
throw new Exception($"Validator index {validatorIndex} is not a member of committee {index}");
}
Root beaconBlockRoot = _cryptographyService.HashTreeRoot(headBlock);
Checkpoint source = headState.CurrentJustifiedCheckpoint;
Epoch currentEpoch = _beaconStateAccessor.GetCurrentEpoch(headState);
Slot startSlot = _beaconChainUtility.ComputeStartSlotOfEpoch(currentEpoch);
Root epochBoundaryBlockRoot;
if (startSlot == headState.Slot)
{
epochBoundaryBlockRoot = beaconBlockRoot;
}
else
{
epochBoundaryBlockRoot = _beaconStateAccessor.GetBlockRootAtSlot(headState, startSlot);
}
Checkpoint target = new Checkpoint(currentEpoch, epochBoundaryBlockRoot);
AttestationData attestationData = new AttestationData(slot, index, beaconBlockRoot, source, target);
var aggregationBits = new BitArray(committeeSize);
aggregationBits.Set(committeeMemberIndexOfValidator.Value, true);
var attestation = new Attestation(aggregationBits, attestationData, BlsSignature.Zero);
return(attestation);
}
/// <summary>
/// Return the beacon committee at ``slot`` for ``index``.
/// </summary>
public IReadOnlyList <ValidatorIndex> GetBeaconCommittee(BeaconState state, Slot slot, CommitteeIndex index)
{
Epoch epoch = _beaconChainUtility.ComputeEpochAtSlot(slot);
ulong committeesPerSlot = GetCommitteeCountAtSlot(state, slot);
IList <ValidatorIndex> indices = GetActiveValidatorIndices(state, epoch);
Bytes32 seed = GetSeed(state, epoch, _signatureDomainOptions.CurrentValue.BeaconAttester);
ulong committeeIndex = (slot % _timeParameterOptions.CurrentValue.SlotsPerEpoch) * committeesPerSlot + (ulong)index;
ulong committeeCount = committeesPerSlot * _timeParameterOptions.CurrentValue.SlotsPerEpoch;
IReadOnlyList <ValidatorIndex> committee = _beaconChainUtility.ComputeCommittee(indices, seed, committeeIndex, committeeCount);
return(committee);
}
public async Task <ApiResponse <Attestation> > NewAttestationAsync(BlsPublicKey validatorPublicKey,
bool proofOfCustodyBit, Slot slot, CommitteeIndex index,
CancellationToken cancellationToken)
{
try
{
Attestation unsignedAttestation = await _attestationProducer
.NewAttestationAsync(validatorPublicKey, proofOfCustodyBit, slot, index, cancellationToken)
.ConfigureAwait(false);
return(ApiResponse.Create(StatusCode.Success, unsignedAttestation));
}
catch (Exception ex)
{
if (_logger.IsWarn())
{
Log.ApiErrorNewAttestation(_logger, ex);
}
throw;
}
}
public CommitteeAssignment(IEnumerable <ValidatorIndex> committee, CommitteeIndex committeeIndex, Slot slot)
{
_committee = new List <ValidatorIndex>(committee);
CommitteeIndex = committeeIndex;
Slot = slot;
}
public static SszElement ToSszBasicElement(this CommitteeIndex item)
{
return(new SszBasicElement((ulong)item));
}
public static void Ize(out UInt256 root, CommitteeIndex container)
{
Ize(out root, container.Number);
}
/// <summary>
/// Return the beacon committee at ``slot`` for ``index``.
/// </summary>
public IReadOnlyList <ValidatorIndex> GetBeaconCommittee(BeaconState state, Slot slot, CommitteeIndex index)
{
var epoch = _beaconChainUtility.ComputeEpochAtSlot(slot);
var committeesPerSlot = GetCommitteeCountAtSlot(state, slot);
//var committeeCount = GetCommitteeCount(state, epoch);
var indices = GetActiveValidatorIndices(state, epoch);
var seed = GetSeed(state, epoch, _signatureDomainOptions.CurrentValue.BeaconAttester);
//var index = (shard + miscellaneousParameters.ShardCount - GetStartShard(state, epoch)) % miscellaneousParameters.ShardCount;
var committeeIndex = (ulong)(slot % _timeParameterOptions.CurrentValue.SlotsPerEpoch) * committeesPerSlot + (ulong)index;
var committeeCount = committeesPerSlot * (ulong)_timeParameterOptions.CurrentValue.SlotsPerEpoch;
var committee = _beaconChainUtility.ComputeCommittee(indices, seed, committeeIndex, committeeCount);
return(committee);
}
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);
}
private static AttestationData BuildAttestationData(IServiceProvider testServiceProvider, BeaconState state, Slot slot, CommitteeIndex index)
{
var beaconChainUtility = testServiceProvider.GetService <BeaconChainUtility>();
var beaconStateAccessor = testServiceProvider.GetService <BeaconStateAccessor>();
if (state.Slot > slot)
{
throw new ArgumentOutOfRangeException(nameof(slot), slot, $"Slot cannot be greater than state slot {state.Slot}.");
}
Hash32 blockRoot;
if (slot == state.Slot)
{
var nextBlock = TestBlock.BuildEmptyBlockForNextSlot(testServiceProvider, state, false);
blockRoot = nextBlock.ParentRoot;
}
else
{
blockRoot = beaconStateAccessor.GetBlockRootAtSlot(state, slot);
}
Hash32 epochBoundaryRoot;
var currentEpoch = beaconStateAccessor.GetCurrentEpoch(state);
var currentEpochStartSlot = beaconChainUtility.ComputeStartSlotOfEpoch(currentEpoch);
if (slot < currentEpochStartSlot)
{
var previousEpoch = beaconStateAccessor.GetPreviousEpoch(state);
epochBoundaryRoot = beaconStateAccessor.GetBlockRoot(state, previousEpoch);
}
else if (slot == currentEpochStartSlot)
{
epochBoundaryRoot = blockRoot;
}
else
{
epochBoundaryRoot = beaconStateAccessor.GetBlockRoot(state, currentEpoch);
}
Epoch sourceEpoch;
Hash32 sourceRoot;
if (slot < currentEpochStartSlot)
{
sourceEpoch = state.PreviousJustifiedCheckpoint.Epoch;
sourceRoot = state.PreviousJustifiedCheckpoint.Root;
}
else
{
sourceEpoch = state.CurrentJustifiedCheckpoint.Epoch;
sourceRoot = state.CurrentJustifiedCheckpoint.Root;
}
//Crosslink parentCrosslink;
//if (epochOfSlot == currentEpoch)
//{
// parentCrosslink = state.CurrentCrosslinks[(int)(ulong)shard];
//}
//else
//{
// throw new NotImplementedException();
//}
var slotEpoch = beaconChainUtility.ComputeEpochAtSlot(slot);
var attestationData = new AttestationData(
slot,
index,
blockRoot,
new Checkpoint(sourceEpoch, sourceRoot),
new Checkpoint(slotEpoch, epochBoundaryRoot));
return(attestationData);
}
public static void Encode(Span <byte> span, CommitteeIndex value)
{
Encode(span, value.Number);
}
private static void Encode(Span <byte> span, CommitteeIndex value, ref int offset)
{
BinaryPrimitives.WriteUInt64LittleEndian(span.Slice(offset), value.Number);
offset += Ssz.CommitteeIndexLength;
}
public async Task <ApiResponse <Attestation> > NewAttestationAsync(BlsPublicKey validatorPublicKey,
bool proofOfCustodyBit, Slot slot, CommitteeIndex index,
CancellationToken cancellationToken)
{
string baseUri = "validator/attestation";
// NOTE: Spec 0.10.1 still has old Shard references in OAPI, although the spec has changed to Index;
// use Index as it is easier to understand (i.e. the spec OAPI in 0.10.1 is wrong)
Dictionary <string, string> queryParameters = new Dictionary <string, string>
{
["validator_pubkey"] = validatorPublicKey.ToString(),
["poc_bit"] = proofOfCustodyBit ? "1" : "0",
["slot"] = slot.ToString(),
["index"] = index.ToString()
};
string uri = QueryHelpers.AddQueryString(baseUri, queryParameters);
using HttpResponseMessage httpResponse =
await _httpClient.GetAsync(uri, HttpCompletionOption.ResponseHeadersRead, cancellationToken);
int statusCode = (int)httpResponse.StatusCode;
if (statusCode == (int)StatusCode.InvalidRequest ||
statusCode == (int)StatusCode.CurrentlySyncing)
{
return(ApiResponse.Create <Attestation>((StatusCode)statusCode));
}
httpResponse.EnsureSuccessStatusCode(); // throws if not 200-299
await using Stream contentStream = await httpResponse.Content.ReadAsStreamAsync();
Attestation content =
await JsonSerializer.DeserializeAsync <Attestation>(contentStream, _jsonSerializerOptions,
cancellationToken);
return(ApiResponse.Create((StatusCode)statusCode, content));
}
