nimbus-eth2/beacon_chain/beacon_node_common.nim

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# beacon_chain
# Copyright (c) 2018-2020 Status Research & Development GmbH
# Licensed and distributed under either of
# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
# at your option. This file may not be copied, modified, or distributed except according to those terms.
# Common routines for a BeaconNode and a BeaconValidator node
import
# Nimble packages
chronos, json_rpc/rpcserver, metrics,
# Local modules
spec/[datatypes, crypto],
conf, time, beacon_chain_db,
attestation_pool, block_pool, eth2_network,
beacon_node_types, mainchain_monitor, request_manager
type
RpcServer* = RpcHttpServer
BeaconNode* = ref object
nickname*: string
network*: Eth2Node
netKeys*: KeyPair
requestManager*: RequestManager
db*: BeaconChainDB
config*: BeaconNodeConf
attachedValidators*: ValidatorPool
blockPool*: BlockPool
attestationPool*: AttestationPool
mainchainMonitor*: MainchainMonitor
beaconClock*: BeaconClock
rpcServer*: RpcServer
forkDigest*: ForkDigest
topicBeaconBlocks*: string
topicAggregateAndProofs*: string
syncLoop*: Future[void]
const MaxEmptySlotCount* = uint64(10*60) div SECONDS_PER_SLOT
# Metrics
declareGauge beacon_head_root,
"Root of the head block of the beacon chain"
proc updateHead*(node: BeaconNode): BlockRef =
# Check pending attestations - maybe we found some blocks for them
node.attestationPool.resolve()
# Grab the new head according to our latest attestation data
let newHead = node.attestationPool.selectHead()
# Store the new head in the block pool - this may cause epochs to be
# justified and finalized
node.blockPool.updateHead(newHead)
beacon_head_root.set newHead.root.toGaugeValue
newHead