465 lines
17 KiB
Nim
465 lines
17 KiB
Nim
# beacon_chain
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# Copyright (c) 2018-2020 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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{.used.}
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import
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std/unittest,
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chronicles, chronos,
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stew/byteutils,
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./testutil, ./testblockutil,
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../beacon_chain/spec/[crypto, datatypes, digest, validator, state_transition,
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helpers, beaconstate, presets, network],
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../beacon_chain/[
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beacon_node_types, attestation_pool, attestation_aggregation, extras, time],
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../beacon_chain/fork_choice/[fork_choice_types, fork_choice],
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../beacon_chain/block_pools/[chain_dag, clearance]
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func combine(tgt: var Attestation, src: Attestation, flags: UpdateFlags) =
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## Combine the signature and participation bitfield, with the assumption that
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## the same data is being signed - if the signatures overlap, they are not
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## combined.
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doAssert tgt.data == src.data
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# In a BLS aggregate signature, one needs to count how many times a
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# particular public key has been added - since we use a single bit per key, we
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# can only it once, thus we can never combine signatures that overlap already!
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if not tgt.aggregation_bits.overlaps(src.aggregation_bits):
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tgt.aggregation_bits.combine(src.aggregation_bits)
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if skipBlsValidation notin flags:
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var agg {.noInit.}: AggregateSignature
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agg.init(tgt.signature)
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agg.aggregate(src.signature)
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tgt.signature = agg.finish()
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template wrappedTimedTest(name: string, body: untyped) =
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# `check` macro takes a copy of whatever it's checking, on the stack!
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# This leads to stack overflow
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# We can mitigate that by wrapping checks in proc
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block: # Symbol namespacing
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proc wrappedTest() =
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timedTest name:
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body
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wrappedTest()
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suiteReport "Attestation pool processing" & preset():
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## For now just test that we can compile and execute block processing with
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## mock data.
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setup:
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# Genesis state that results in 3 members per committee
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var
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chainDag = init(ChainDAGRef, defaultRuntimePreset, makeTestDB(SLOTS_PER_EPOCH * 3))
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quarantine = QuarantineRef()
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pool = newClone(AttestationPool.init(chainDag, quarantine))
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state = newClone(chainDag.headState)
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cache = StateCache()
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# Slot 0 is a finalized slot - won't be making attestations for it..
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check:
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process_slots(state.data, state.data.data.slot + 1, cache)
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wrappedTimedTest "Can add and retrieve simple attestation" & preset():
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let
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# Create an attestation for slot 1!
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beacon_committee = get_beacon_committee(
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state.data.data, state.data.data.slot, 0.CommitteeIndex, cache)
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attestation = makeAttestation(
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state.data.data, state.blck.root, beacon_committee[0], cache)
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pool[].addAttestation(
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attestation, [beacon_committee[0]].toHashSet(), attestation.data.slot)
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check:
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process_slots(state.data, MIN_ATTESTATION_INCLUSION_DELAY.Slot + 1, cache)
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let attestations = pool[].getAttestationsForBlock(state.data.data, cache)
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check:
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attestations.len == 1
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wrappedTimedTest "Attestations may arrive in any order" & preset():
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var cache = StateCache()
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let
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# Create an attestation for slot 1!
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bc0 = get_beacon_committee(
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state.data.data, state.data.data.slot, 0.CommitteeIndex, cache)
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attestation0 = makeAttestation(
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state.data.data, state.blck.root, bc0[0], cache)
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check:
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process_slots(state.data, state.data.data.slot + 1, cache)
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let
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bc1 = get_beacon_committee(state.data.data,
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state.data.data.slot, 0.CommitteeIndex, cache)
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attestation1 = makeAttestation(
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state.data.data, state.blck.root, bc1[0], cache)
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# test reverse order
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pool[].addAttestation(
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attestation1, [bc1[0]].toHashSet, attestation1.data.slot)
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pool[].addAttestation(
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attestation0, [bc0[0]].toHashSet, attestation1.data.slot)
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discard process_slots(
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state.data, MIN_ATTESTATION_INCLUSION_DELAY.Slot + 1, cache)
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let attestations = pool[].getAttestationsForBlock(state.data.data, cache)
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check:
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attestations.len == 1
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wrappedTimedTest "Attestations should be combined" & preset():
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var cache = StateCache()
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let
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# Create an attestation for slot 1!
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bc0 = get_beacon_committee(
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state.data.data, state.data.data.slot, 0.CommitteeIndex, cache)
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attestation0 = makeAttestation(
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state.data.data, state.blck.root, bc0[0], cache)
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attestation1 = makeAttestation(
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state.data.data, state.blck.root, bc0[1], cache)
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pool[].addAttestation(
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attestation0, [bc0[0]].toHashSet, attestation0.data.slot)
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pool[].addAttestation(
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attestation1, [bc0[1]].toHashSet, attestation1.data.slot)
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check:
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process_slots(state.data, MIN_ATTESTATION_INCLUSION_DELAY.Slot + 1, cache)
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let attestations = pool[].getAttestationsForBlock(state.data.data, cache)
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check:
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attestations.len == 1
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wrappedTimedTest "Attestations may overlap, bigger first" & preset():
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var cache = StateCache()
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var
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# Create an attestation for slot 1!
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bc0 = get_beacon_committee(
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state.data.data, state.data.data.slot, 0.CommitteeIndex, cache)
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attestation0 = makeAttestation(
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state.data.data, state.blck.root, bc0[0], cache)
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attestation1 = makeAttestation(
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state.data.data, state.blck.root, bc0[1], cache)
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attestation0.combine(attestation1, {})
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pool[].addAttestation(
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attestation0, [bc0[0]].toHashSet, attestation0.data.slot)
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pool[].addAttestation(
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attestation1, [bc0[1]].toHashSet, attestation1.data.slot)
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check:
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process_slots(state.data, MIN_ATTESTATION_INCLUSION_DELAY.Slot + 1, cache)
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let attestations = pool[].getAttestationsForBlock(state.data.data, cache)
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check:
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attestations.len == 1
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wrappedTimedTest "Attestations may overlap, smaller first" & preset():
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var cache = StateCache()
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var
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# Create an attestation for slot 1!
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bc0 = get_beacon_committee(state.data.data,
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state.data.data.slot, 0.CommitteeIndex, cache)
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attestation0 = makeAttestation(
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state.data.data, state.blck.root, bc0[0], cache)
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attestation1 = makeAttestation(
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state.data.data, state.blck.root, bc0[1], cache)
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attestation0.combine(attestation1, {})
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pool[].addAttestation(
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attestation1, [bc0[1]].toHashSet, attestation1.data.slot)
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pool[].addAttestation(
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attestation0, [bc0[0]].toHashSet, attestation0.data.slot)
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check:
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process_slots(state.data, MIN_ATTESTATION_INCLUSION_DELAY.Slot + 1, cache)
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let attestations = pool[].getAttestationsForBlock(state.data.data, cache)
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check:
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attestations.len == 1
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wrappedTimedTest "Fork choice returns latest block with no attestations":
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var cache = StateCache()
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let
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b1 = addTestBlock(state.data, chainDag.tail.root, cache)
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b1Add = chainDag.addRawBlock(quarantine, b1) do (
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blckRef: BlockRef, signedBlock: SignedBeaconBlock,
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epochRef: EpochRef, state: HashedBeaconState):
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# Callback add to fork choice if valid
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pool[].addForkChoice(epochRef, blckRef, signedBlock.message, blckRef.slot)
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let head = pool[].selectHead(b1Add[].slot)
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check:
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head == b1Add[]
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let
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b2 = addTestBlock(state.data, b1.root, cache)
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b2Add = chainDag.addRawBlock(quarantine, b2) do (
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blckRef: BlockRef, signedBlock: SignedBeaconBlock,
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epochRef: EpochRef, state: HashedBeaconState):
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# Callback add to fork choice if valid
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pool[].addForkChoice(epochRef, blckRef, signedBlock.message, blckRef.slot)
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let head2 = pool[].selectHead(b2Add[].slot)
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check:
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head2 == b2Add[]
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wrappedTimedTest "Fork choice returns block with attestation":
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var cache = StateCache()
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let
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b10 = makeTestBlock(state.data, chainDag.tail.root, cache)
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b10Add = chainDag.addRawBlock(quarantine, b10) do (
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blckRef: BlockRef, signedBlock: SignedBeaconBlock,
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epochRef: EpochRef, state: HashedBeaconState):
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# Callback add to fork choice if valid
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pool[].addForkChoice(epochRef, blckRef, signedBlock.message, blckRef.slot)
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let head = pool[].selectHead(b10Add[].slot)
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check:
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head == b10Add[]
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let
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b11 = makeTestBlock(state.data, chainDag.tail.root, cache,
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graffiti = GraffitiBytes [1'u8, 0, 0, 0 ,0 ,0 ,0 ,0 ,0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
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)
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b11Add = chainDag.addRawBlock(quarantine, b11) do (
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blckRef: BlockRef, signedBlock: SignedBeaconBlock,
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epochRef: EpochRef, state: HashedBeaconState):
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# Callback add to fork choice if valid
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pool[].addForkChoice(epochRef, blckRef, signedBlock.message, blckRef.slot)
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bc1 = get_beacon_committee(
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state.data.data, state.data.data.slot - 1, 1.CommitteeIndex, cache)
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attestation0 = makeAttestation(state.data.data, b10.root, bc1[0], cache)
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pool[].addAttestation(
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attestation0, [bc1[0]].toHashSet, attestation0.data.slot)
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let head2 = pool[].selectHead(b10Add[].slot)
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check:
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# Single vote for b10 and no votes for b11
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head2 == b10Add[]
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let
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attestation1 = makeAttestation(state.data.data, b11.root, bc1[1], cache)
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attestation2 = makeAttestation(state.data.data, b11.root, bc1[2], cache)
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pool[].addAttestation(
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attestation1, [bc1[1]].toHashSet, attestation1.data.slot)
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let head3 = pool[].selectHead(b10Add[].slot)
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let bigger = if b11.root.data < b10.root.data: b10Add else: b11Add
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check:
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# Ties broken lexicographically in spec -> ?
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head3 == bigger[]
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pool[].addAttestation(
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attestation2, [bc1[2]].toHashSet, attestation2.data.slot)
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let head4 = pool[].selectHead(b11Add[].slot)
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check:
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# Two votes for b11
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head4 == b11Add[]
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wrappedTimedTest "Trying to add a block twice tags the second as an error":
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var cache = StateCache()
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let
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b10 = makeTestBlock(state.data, chainDag.tail.root, cache)
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b10Add = chainDag.addRawBlock(quarantine, b10) do (
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blckRef: BlockRef, signedBlock: SignedBeaconBlock,
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epochRef: EpochRef, state: HashedBeaconState):
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# Callback add to fork choice if valid
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pool[].addForkChoice(epochRef, blckRef, signedBlock.message, blckRef.slot)
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let head = pool[].selectHead(b10Add[].slot)
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check:
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head == b10Add[]
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# -------------------------------------------------------------
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# Add back the old block to ensure we have a duplicate error
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let b10_clone = b10 # Assumes deep copy
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let b10Add_clone = chainDag.addRawBlock(quarantine, b10_clone) do (
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blckRef: BlockRef, signedBlock: SignedBeaconBlock,
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epochRef: EpochRef, state: HashedBeaconState):
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# Callback add to fork choice if valid
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pool[].addForkChoice(epochRef, blckRef, signedBlock.message, blckRef.slot)
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doAssert: b10Add_clone.error == (ValidationResult.Ignore, Duplicate)
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wrappedTimedTest "Trying to add a duplicate block from an old pruned epoch is tagged as an error":
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# Note: very sensitive to stack usage
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chainDag.updateFlags.incl {skipBLSValidation}
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var cache = StateCache()
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let
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b10 = addTestBlock(state.data, chainDag.tail.root, cache)
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b10Add = chainDag.addRawBlock(quarantine, b10) do (
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blckRef: BlockRef, signedBlock: SignedBeaconBlock,
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epochRef: EpochRef, state: HashedBeaconState):
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# Callback add to fork choice if valid
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pool[].addForkChoice(epochRef, blckRef, signedBlock.message, blckRef.slot)
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let head = pool[].selectHead(b10Add[].slot)
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doAssert: head == b10Add[]
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# -------------------------------------------------------------
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let b10_clone = b10 # Assumes deep copy
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# -------------------------------------------------------------
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# Pass an epoch
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var block_root = b10.root
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var attestations: seq[Attestation]
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for epoch in 0 ..< 5:
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let start_slot = compute_start_slot_at_epoch(Epoch epoch)
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let committees_per_slot =
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get_committee_count_per_slot(state.data.data, Epoch epoch, cache)
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for slot in start_slot ..< start_slot + SLOTS_PER_EPOCH:
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let new_block = addTestBlock(
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state.data, block_root, cache, attestations = attestations)
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block_root = new_block.root
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let blockRef = chainDag.addRawBlock(quarantine, new_block) do (
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blckRef: BlockRef, signedBlock: SignedBeaconBlock,
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epochRef: EpochRef, state: HashedBeaconState):
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# Callback add to fork choice if valid
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pool[].addForkChoice(epochRef, blckRef, signedBlock.message, blckRef.slot)
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let head = pool[].selectHead(blockRef[].slot)
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doassert: head == blockRef[]
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chainDag.updateHead(head, quarantine)
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attestations.setlen(0)
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for index in 0'u64 ..< committees_per_slot:
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let committee = get_beacon_committee(
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state.data.data, state.data.data.slot, index.CommitteeIndex, cache)
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# Create a bitfield filled with the given count per attestation,
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# exactly on the right-most part of the committee field.
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var aggregation_bits = init(CommitteeValidatorsBits, committee.len)
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for v in 0 ..< committee.len * 2 div 3 + 1:
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aggregation_bits[v] = true
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attestations.add Attestation(
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aggregation_bits: aggregation_bits,
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data: makeAttestationData(
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state.data.data, state.data.data.slot,
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index.CommitteeIndex, blockroot)
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# signature: ValidatorSig()
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)
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cache = StateCache()
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# -------------------------------------------------------------
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# Prune
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doAssert: chainDag.finalizedHead.slot != 0
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pool[].prune()
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doAssert: b10.root notin pool.forkChoice.backend
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# Add back the old block to ensure we have a duplicate error
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let b10Add_clone = chainDag.addRawBlock(quarantine, b10_clone) do (
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blckRef: BlockRef, signedBlock: SignedBeaconBlock,
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epochRef: EpochRef, state: HashedBeaconState):
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# Callback add to fork choice if valid
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pool[].addForkChoice(epochRef, blckRef, signedBlock.message, blckRef.slot)
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doAssert: b10Add_clone.error == (ValidationResult.Ignore, Duplicate)
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suiteReport "Attestation validation " & preset():
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setup:
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# Genesis state that results in 3 members per committee
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var
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chainDag = init(ChainDAGRef, defaultRuntimePreset, makeTestDB(SLOTS_PER_EPOCH * 3))
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quarantine = QuarantineRef()
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pool = newClone(AttestationPool.init(chainDag, quarantine))
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state = newClone(chainDag.headState)
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cache = StateCache()
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# Slot 0 is a finalized slot - won't be making attestations for it..
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check:
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process_slots(state.data, state.data.data.slot + 1, cache)
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wrappedTimedTest "Validation sanity":
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chainDag.updateFlags.incl {skipBLSValidation}
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var
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cache: StateCache
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for blck in makeTestBlocks(
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chainDag.headState.data, chainDag.head.root, cache,
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int(SLOTS_PER_EPOCH * 5), false):
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let added = chainDag.addRawBlock(quarantine, blck) do (
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blckRef: BlockRef, signedBlock: SignedBeaconBlock,
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epochRef: EpochRef, state: HashedBeaconState):
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# Callback add to fork choice if valid
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pool[].addForkChoice(epochRef, blckRef, signedBlock.message, blckRef.slot)
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check: added.isOk()
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chainDag.updateHead(added[], quarantine)
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var
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# Create an attestation for slot 1!
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beacon_committee = get_beacon_committee(
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chainDag.headState.data.data, chainDag.head.slot, 0.CommitteeIndex, cache)
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attestation = makeAttestation(
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chainDag.headState.data.data, chainDag.head.root, beacon_committee[0], cache)
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committees_per_slot =
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get_committee_count_per_slot(chainDag.headState.data.data,
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attestation.data.slot.epoch, cache)
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subnet = compute_subnet_for_attestation(
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committees_per_slot,
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attestation.data.slot, attestation.data.index.CommitteeIndex)
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beaconTime = attestation.data.slot.toBeaconTime()
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check:
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validateAttestation(pool[], attestation, beaconTime, subnet).isOk
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# Same validator again
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validateAttestation(pool[], attestation, beaconTime, subnet).error()[0] ==
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ValidationResult.Ignore
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pool[].nextAttestationEpoch.setLen(0) # reset for test
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check:
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# Wrong subnet
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validateAttestation(pool[], attestation, beaconTime, subnet + 1).isErr
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pool[].nextAttestationEpoch.setLen(0) # reset for test
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check:
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# Too far in the future
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validateAttestation(
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pool[], attestation, beaconTime - 1.seconds, subnet + 1).isErr
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pool[].nextAttestationEpoch.setLen(0) # reset for test
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check:
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# Too far in the past
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validateAttestation(
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pool[], attestation,
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beaconTime - (SECONDS_PER_SLOT * SLOTS_PER_EPOCH - 1).int.seconds,
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subnet + 1).isErr
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