nimbus-eth2/beacon_chain/spec/network.nim

85 lines
3.4 KiB
Nim

# beacon_chain
# Copyright (c) 2018-2021 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.
{.push raises: [Defect].}
import
"."/[datatypes, digest, helpers]
const
# https://github.com/ethereum/eth2.0-specs/blob/v1.0.1/specs/phase0/p2p-interface.md#topics-and-messages
topicBeaconBlocksSuffix* = "beacon_block/ssz"
topicVoluntaryExitsSuffix* = "voluntary_exit/ssz"
topicProposerSlashingsSuffix* = "proposer_slashing/ssz"
topicAttesterSlashingsSuffix* = "attester_slashing/ssz"
topicAggregateAndProofsSuffix* = "beacon_aggregate_and_proof/ssz"
# https://github.com/ethereum/eth2.0-specs/blob/v1.0.1/specs/phase0/p2p-interface.md#eth2-network-interaction-domains
MAX_CHUNK_SIZE* = 1 * 1024 * 1024 # bytes
GOSSIP_MAX_SIZE* = 1 * 1024 * 1024 # bytes
TTFB_TIMEOUT* = 5.seconds
RESP_TIMEOUT* = 10.seconds
defaultEth2TcpPort* = 9000
# This is not part of the spec yet! Keep in sync with BASE_RPC_PORT
defaultEth2RpcPort* = 9190
# This is not part of the spec! But its port which uses Lighthouse
DefaultEth2RestPort* = 5052
template eth2Prefix(forkDigest: ForkDigest): string =
"/eth2/" & $forkDigest & "/"
func getBeaconBlocksTopic*(forkDigest: ForkDigest): string =
eth2Prefix(forkDigest) & topicBeaconBlocksSuffix
func getVoluntaryExitsTopic*(forkDigest: ForkDigest): string =
eth2Prefix(forkDigest) & topicVoluntaryExitsSuffix
func getProposerSlashingsTopic*(forkDigest: ForkDigest): string =
eth2Prefix(forkDigest) & topicProposerSlashingsSuffix
func getAttesterSlashingsTopic*(forkDigest: ForkDigest): string =
eth2Prefix(forkDigest) & topicAttesterSlashingsSuffix
func getAggregateAndProofsTopic*(forkDigest: ForkDigest): string =
eth2Prefix(forkDigest) & topicAggregateAndProofsSuffix
# https://github.com/ethereum/eth2.0-specs/blob/v1.0.1/specs/phase0/validator.md#broadcast-attestation
func compute_subnet_for_attestation*(
committees_per_slot: uint64, slot: Slot, committee_index: CommitteeIndex):
SubnetId =
# Compute the correct subnet for an attestation for Phase 0.
# Note, this mimics expected Phase 1 behavior where attestations will be
# mapped to their shard subnet.
let
slots_since_epoch_start = slot mod SLOTS_PER_EPOCH
committees_since_epoch_start =
committees_per_slot * slots_since_epoch_start
SubnetId(
(committees_since_epoch_start + committee_index.uint64) mod
ATTESTATION_SUBNET_COUNT)
# https://github.com/ethereum/eth2.0-specs/blob/v1.0.1/specs/phase0/validator.md#broadcast-attestation
func getAttestationTopic*(forkDigest: ForkDigest, subnet_id: SubnetId):
string =
## For subscribing and unsubscribing to/from a subnet.
eth2Prefix(forkDigest) & "beacon_attestation_" & $uint64(subnet_id) & "/ssz"
func getENRForkID*(fork: Fork, genesis_validators_root: Eth2Digest): ENRForkID =
let
current_fork_version = fork.current_version
fork_digest = compute_fork_digest(
current_fork_version, genesis_validators_root)
ENRForkID(
fork_digest: fork_digest,
next_fork_version: current_fork_version,
next_fork_epoch: FAR_FUTURE_EPOCH)