114 lines
4.4 KiB
Nim
114 lines
4.4 KiB
Nim
# 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.
|
|
|
|
{.push raises: [Defect].}
|
|
|
|
import
|
|
strformat,
|
|
datatypes
|
|
|
|
const
|
|
# https://github.com/ethereum/eth2.0-specs/blob/v0.12.1/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/v0.11.3/specs/phase0/p2p-interface.md#topics-and-messages
|
|
topicMainnetAttestationsSuffix* = "_beacon_attestation/ssz"
|
|
|
|
# https://github.com/ethereum/eth2.0-specs/blob/v0.12.1/specs/phase0/validator.md#misc
|
|
ATTESTATION_SUBNET_COUNT* = 64
|
|
|
|
defaultEth2TcpPort* = 9000
|
|
|
|
# This is not part of the spec yet!
|
|
defaultEth2RpcPort* = 9090
|
|
|
|
when ETH2_SPEC == "v0.11.3":
|
|
const topicInteropAttestationSuffix* = "beacon_attestation/ssz"
|
|
|
|
func getBeaconBlocksTopic*(forkDigest: ForkDigest): string =
|
|
try:
|
|
&"/eth2/{$forkDigest}/{topicBeaconBlocksSuffix}"
|
|
except ValueError as e:
|
|
raiseAssert e.msg
|
|
|
|
func getVoluntaryExitsTopic*(forkDigest: ForkDigest): string =
|
|
try:
|
|
&"/eth2/{$forkDigest}/{topicVoluntaryExitsSuffix}"
|
|
except ValueError as e:
|
|
raiseAssert e.msg
|
|
|
|
func getProposerSlashingsTopic*(forkDigest: ForkDigest): string =
|
|
try:
|
|
&"/eth2/{$forkDigest}/{topicProposerSlashingsSuffix}"
|
|
except ValueError as e:
|
|
raiseAssert e.msg
|
|
|
|
func getAttesterSlashingsTopic*(forkDigest: ForkDigest): string =
|
|
try:
|
|
&"/eth2/{$forkDigest}/{topicAttesterSlashingsSuffix}"
|
|
except ValueError as e:
|
|
raiseAssert e.msg
|
|
|
|
func getAggregateAndProofsTopic*(forkDigest: ForkDigest): string =
|
|
try:
|
|
&"/eth2/{$forkDigest}/{topicAggregateAndProofsSuffix}"
|
|
except ValueError as e:
|
|
raiseAssert e.msg
|
|
|
|
when ETH2_SPEC == "v0.11.3":
|
|
func getInteropAttestationTopic*(forkDigest: ForkDigest): string =
|
|
try:
|
|
&"/eth2/{$forkDigest}/{topicInteropAttestationSuffix}"
|
|
except ValueError as e:
|
|
raiseAssert e.msg
|
|
|
|
# https://github.com/ethereum/eth2.0-specs/blob/v0.11.3/specs/phase0/p2p-interface.md#mainnet-3
|
|
func getMainnetAttestationTopic*(forkDigest: ForkDigest, committeeIndex: uint64): string =
|
|
let topicIndex = committeeIndex mod ATTESTATION_SUBNET_COUNT
|
|
try:
|
|
&"/eth2/{$forkDigest}/committee_index{topicIndex}{topicMainnetAttestationsSuffix}"
|
|
except ValueError as e:
|
|
raiseAssert e.msg
|
|
|
|
when ETH2_SPEC == "v0.12.1":
|
|
import helpers
|
|
|
|
# https://github.com/ethereum/eth2.0-specs/blob/v0.12.1/specs/phase0/validator.md#broadcast-attestation
|
|
func compute_subnet_for_attestation*(
|
|
num_active_validators: uint64, attestation: Attestation): uint64 =
|
|
# Compute the correct subnet for an attestation for Phase 0.
|
|
# Note, this mimics expected Phase 1 behavior where attestations will be
|
|
# mapped to their shard subnet.
|
|
#
|
|
# The spec version has params (state: BeaconState, attestation: Attestation),
|
|
# but it's only to call get_committee_count_at_slot(), which needs only epoch
|
|
# and the number of active validators.
|
|
let
|
|
slots_since_epoch_start = attestation.data.slot mod SLOTS_PER_EPOCH
|
|
committees_since_epoch_start =
|
|
get_committee_count_at_slot(num_active_validators) * slots_since_epoch_start
|
|
|
|
(committees_since_epoch_start + attestation.data.index) mod ATTESTATION_SUBNET_COUNT
|
|
|
|
# https://github.com/ethereum/eth2.0-specs/blob/v0.12.1/specs/phase0/validator.md#broadcast-attestation
|
|
func getAttestationTopic*(forkDigest: ForkDigest, subnetIndex: uint64):
|
|
string =
|
|
# This is for subscribing or broadcasting manually to a known index.
|
|
try:
|
|
&"/eth2/{$forkDigest}/beacon_attestation_{subnetIndex}/ssz"
|
|
except ValueError as e:
|
|
raiseAssert e.msg
|
|
|
|
func getAttestationTopic*(forkDigest: ForkDigest, attestation: Attestation, num_active_validators: uint64): string =
|
|
getAttestationTopic(
|
|
forkDigest,
|
|
compute_subnet_for_attestation(num_active_validators, attestation))
|