mirror of
https://github.com/status-im/nimbus-eth2.git
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01efa93cf6
Introduces a new library for syncing using libp2p based light client sync protocol, and adds a new `nimbus_light_client` executable that uses this library for syncing. The new executable emits log messages when new beacon block headers are received, and is integrated into testing.
100 lines
3.5 KiB
Nim
100 lines
3.5 KiB
Nim
# beacon_chain
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# Copyright (c) 2022 Status Research & Development GmbH
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# Licensed and distributed under either of
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# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
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# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
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# at your option. This file may not be copied, modified, or distributed except according to those terms.
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# This implements the pre-release proposal of the libp2p based light client sync
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# protocol. See https://github.com/ethereum/consensus-specs/pull/2802
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import
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std/os,
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chronicles, chronos,
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eth/keys,
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./spec/beaconstate,
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"."/[light_client, nimbus_binary_common, version]
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proc onFinalizedHeader(lightClient: LightClient) =
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notice "New LC finalized header",
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finalized_header = shortLog(lightClient.finalizedHeader.get)
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proc onOptimisticHeader(lightClient: LightClient) =
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notice "New LC optimistic header",
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optimistic_header = shortLog(lightClient.optimisticHeader.get)
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proc onSecond(
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lightClient: LightClient,
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config: LightClientConf,
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getBeaconTime: GetBeaconTimeFn) =
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## This procedure will be called once per second.
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let wallSlot = getBeaconTime().slotOrZero()
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checkIfShouldStopAtEpoch(wallSlot, config.stopAtEpoch)
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lightClient.updateGossipStatus(wallSlot + 1)
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proc runOnSecondLoop(
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lightClient: LightClient,
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config: LightClientConf,
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getBeaconTime: GetBeaconTimeFn) {.async.} =
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while true:
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onSecond(lightClient, config, getBeaconTime)
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await chronos.sleepAsync(chronos.seconds(1))
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programMain:
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var config = makeBannerAndConfig(
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"Nimbus light client " & fullVersionStr, LightClientConf)
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setupLogging(config.logLevel, config.logStdout, config.logFile)
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notice "Launching light client",
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version = fullVersionStr, cmdParams = commandLineParams(), config
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let metadata = loadEth2Network(config.eth2Network)
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for node in metadata.bootstrapNodes:
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config.bootstrapNodes.add node
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template cfg(): auto = metadata.cfg
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let
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genesisState =
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try:
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template genesisData(): auto = metadata.genesisData
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newClone(readSszForkedHashedBeaconState(
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cfg, genesisData.toOpenArrayByte(genesisData.low, genesisData.high)))
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except CatchableError as err:
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raiseAssert "Invalid baked-in state: " & err.msg
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beaconClock = BeaconClock.init(
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getStateField(genesisState[], genesis_time))
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getBeaconTime = beaconClock.getBeaconTimeFn()
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genesis_validators_root =
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getStateField(genesisState[], genesis_validators_root)
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forkDigests = newClone ForkDigests.init(cfg, genesis_validators_root)
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genesisBlockRoot = get_initial_beacon_block(genesisState[]).root
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rng = keys.newRng()
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netKeys = optimisticgetRandomNetKeys(rng[])
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network = createEth2Node(
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rng, config, netKeys, cfg,
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forkDigests, getBeaconTime, genesis_validators_root)
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lightClient = createLightClient(
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network, rng, config, cfg,
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forkDigests, getBeaconTime, genesis_validators_root)
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info "Listening to incoming network requests"
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network.initBeaconSync(cfg, forkDigests, genesisBlockRoot, getBeaconTime)
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lightClient.installMessageValidators()
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waitFor network.startListening()
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waitFor network.start()
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lightClient.onFinalizedHeader = onFinalizedHeader
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lightClient.onOptimisticHeader = onOptimisticHeader
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lightClient.trustedBlockRoot = some config.trustedBlockRoot
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lightClient.start()
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asyncSpawn runOnSecondLoop(lightClient, config, getBeaconTime)
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while true:
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poll()
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