private static AttestationData BuildAttestationData(IServiceProvider testServiceProvider, BeaconState state, Slot slot, CommitteeIndex index)
{
BeaconChainUtility beaconChainUtility = testServiceProvider.GetService <BeaconChainUtility>();
BeaconStateAccessor beaconStateAccessor = testServiceProvider.GetService <BeaconStateAccessor>();
if (state.Slot > slot)
{
throw new ArgumentOutOfRangeException(nameof(slot), slot, $"Slot cannot be greater than state slot {state.Slot}.");
}
Root blockRoot;
if (slot == state.Slot)
{
BeaconBlock nextBlock = TestBlock.BuildEmptyBlockForNextSlot(testServiceProvider, state, BlsSignature.Zero);
blockRoot = nextBlock.ParentRoot;
}
else
{
blockRoot = beaconStateAccessor.GetBlockRootAtSlot(state, slot);
}
Root epochBoundaryRoot;
Epoch currentEpoch = beaconStateAccessor.GetCurrentEpoch(state);
Slot currentEpochStartSlot = beaconChainUtility.ComputeStartSlotOfEpoch(currentEpoch);
if (slot < currentEpochStartSlot)
{
Epoch previousEpoch = beaconStateAccessor.GetPreviousEpoch(state);
epochBoundaryRoot = beaconStateAccessor.GetBlockRoot(state, previousEpoch);
}
else if (slot == currentEpochStartSlot)
{
epochBoundaryRoot = blockRoot;
}
else
{
epochBoundaryRoot = beaconStateAccessor.GetBlockRoot(state, currentEpoch);
}
Epoch sourceEpoch;
Root 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();
//}
Epoch slotEpoch = beaconChainUtility.ComputeEpochAtSlot(slot);
AttestationData attestationData = new AttestationData(
slot,
index,
blockRoot,
new Checkpoint(sourceEpoch, sourceRoot),
new Checkpoint(slotEpoch, epochBoundaryRoot));
return(attestationData);
}