コード例 #1
0
        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);
        }