private async Task HandlePeerStatus(string peerId, PeeringStatus peerPeeringStatus, Root headRoot,
BeaconState beaconState)
{
// if not valid, "immediately disconnect from one another following the handshake"
bool isValidPeer = await IsValidPeerStatus(peerId, peerPeeringStatus, headRoot, beaconState)
.ConfigureAwait(false);
if (!isValidPeer)
{
await _networkPeering.DisconnectPeerAsync(peerId).ConfigureAwait(false);
return;
}
// check if we should request blocks
var isPeerAhead = IsPeerAhead(peerPeeringStatus, beaconState);
if (isPeerAhead)
{
// In theory, our chain since finalized checkpoint could be wrong
// However it may be more efficient to check if our head is correct and sync from there,
// or use the step option to sample blocks and find where we diverge.
Slot finalizedSlot = _beaconChainUtility.ComputeStartSlotOfEpoch(beaconState.FinalizedCheckpoint.Epoch);
if (_logger.IsInfo())
{
Log.RequestingBlocksFromAheadPeer(_logger, peerId, finalizedSlot, peerPeeringStatus.HeadRoot,
peerPeeringStatus.HeadSlot, null);
}
// TODO: Need more sophistication, like Eth1; as peers are discovered, just put into a pool,
// then, when need for sync determined, select the best peer(s) to use.
await _networkPeering.RequestBlocksAsync(peerId, peerPeeringStatus.HeadRoot, finalizedSlot,
peerPeeringStatus.HeadSlot);
}
else
{
if (_logger.IsDebug())
{
LogDebug.PeerBehind(_logger, peerId, peerPeeringStatus.FinalizedEpoch, peerPeeringStatus.HeadRoot,
peerPeeringStatus.HeadSlot, null);
}
}
}
