575 lines
21 KiB
Nim
575 lines
21 KiB
Nim
# beacon_chain
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# Copyright (c) 2018-2021 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/sequtils,
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# Status lib
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unittest2,
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chronicles, chronos,
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stew/byteutils,
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eth/keys,
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# Internal
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../beacon_chain/[beacon_node_types],
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../beacon_chain/gossip_processing/[gossip_validation],
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../beacon_chain/fork_choice/[fork_choice_types, fork_choice],
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../beacon_chain/consensus_object_pools/[
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block_quarantine, blockchain_dag, block_clearance, attestation_pool],
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../beacon_chain/spec/datatypes/phase0,
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../beacon_chain/spec/[forks, state_transition, helpers],
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# Test utilities
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./testutil, ./testdbutil, ./testblockutil
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func combine(tgt: var Attestation, src: Attestation) =
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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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doAssert not tgt.aggregation_bits.overlaps(src.aggregation_bits)
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tgt.aggregation_bits.incl(src.aggregation_bits)
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var agg {.noInit.}: AggregateSignature
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agg.init(tgt.signature.load().get())
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agg.aggregate(src.signature.load.get())
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tgt.signature = agg.finish().toValidatorSig()
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func loadSig(a: Attestation): CookedSig =
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a.signature.load.get()
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proc pruneAtFinalization(dag: ChainDAGRef, attPool: AttestationPool) =
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if dag.needStateCachesAndForkChoicePruning():
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dag.pruneStateCachesDAG()
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# pool[].prune() # We test logic without attestation pool / fork choice pruning
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suite "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 6 members per committee
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var
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dag = init(ChainDAGRef, defaultRuntimeConfig, makeTestDB(SLOTS_PER_EPOCH * 6), {})
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quarantine = QuarantineRef.init(keys.newRng())
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pool = newClone(AttestationPool.init(dag, quarantine))
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state = newClone(dag.headState)
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cache = StateCache()
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rewards: RewardInfo
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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(
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dag.cfg, state.data, getStateField(state.data, slot) + 1, cache, rewards,
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{})
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test "Can add and retrieve simple attestations" & preset():
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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, getStateField(state.data, slot), 0.CommitteeIndex, cache)
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attestation = makeAttestation(state[].data, state.blck.root, bc0[0], cache)
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pool[].addAttestation(
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attestation, @[bc0[0]], attestation.loadSig,
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attestation.data.slot)
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check:
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# Added attestation, should get it back
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toSeq(pool[].attestations(none(Slot), none(CommitteeIndex))) ==
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@[attestation]
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toSeq(pool[].attestations(
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some(attestation.data.slot), none(CommitteeIndex))) == @[attestation]
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toSeq(pool[].attestations(
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some(attestation.data.slot), some(attestation.data.index.CommitteeIndex))) ==
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@[attestation]
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toSeq(pool[].attestations(none(Slot), some(attestation.data.index.CommitteeIndex))) ==
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@[attestation]
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toSeq(pool[].attestations(some(
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attestation.data.slot + 1), none(CommitteeIndex))) == []
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toSeq(pool[].attestations(
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none(Slot), some(CommitteeIndex(attestation.data.index + 1)))) == []
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process_slots(
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defaultRuntimeConfig, state.data,
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getStateField(state.data, slot) + MIN_ATTESTATION_INCLUSION_DELAY, cache,
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rewards, {})
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let attestations = pool[].getAttestationsForTestBlock(state[], cache)
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check:
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attestations.len == 1
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pool[].getAggregatedAttestation(1.Slot, 0.CommitteeIndex).isSome()
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let
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root1 = addTestBlock(
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state.data, state.blck.root,
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cache, attestations = attestations, nextSlot = false).root
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bc1 = get_beacon_committee(
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state[].data, getStateField(state.data, slot), 0.CommitteeIndex, cache)
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att1 = makeAttestation(state[].data, root1, bc1[0], cache)
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check:
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process_slots(
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defaultRuntimeConfig, state.data,
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getStateField(state.data, slot) + MIN_ATTESTATION_INCLUSION_DELAY, cache,
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rewards, {})
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check:
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# shouldn't include already-included attestations
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pool[].getAttestationsForTestBlock(state[], cache) == []
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pool[].addAttestation(
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att1, @[bc1[0]], att1.loadSig, att1.data.slot)
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check:
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# but new ones should go in
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pool[].getAttestationsForTestBlock(state[], cache).len() == 1
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let
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att2 = makeAttestation(state[].data, root1, bc1[1], cache)
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pool[].addAttestation(
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att2, @[bc1[1]], att2.loadSig, att2.data.slot)
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let
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combined = pool[].getAttestationsForTestBlock(state[], cache)
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check:
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# New attestations should be combined with old attestations
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combined.len() == 1
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combined[0].aggregation_bits.countOnes() == 2
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pool[].addAttestation(
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combined[0], @[bc1[1], bc1[0]], combined[0].loadSig, combined[0].data.slot)
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check:
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# readding the combined attestation shouldn't have an effect
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pool[].getAttestationsForTestBlock(state[], cache).len() == 1
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let
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# Someone votes for a different root
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att3 = makeAttestation(state[].data, Eth2Digest(), bc1[2], cache)
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pool[].addAttestation(
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att3, @[bc1[2]], att3.loadSig, att3.data.slot)
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check:
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# We should now get both attestations for the block, but the aggregate
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# should be the one with the most votes
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pool[].getAttestationsForTestBlock(state[], cache).len() == 2
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pool[].getAggregatedAttestation(2.Slot, 0.CommitteeIndex).
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get().aggregation_bits.countOnes() == 2
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pool[].getAggregatedAttestation(2.Slot, hash_tree_root(att2.data)).
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get().aggregation_bits.countOnes() == 2
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let
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# Someone votes for a different root
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att4 = makeAttestation(state[].data, Eth2Digest(), bc1[2], cache)
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pool[].addAttestation(
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att4, @[bc1[2]], att3.loadSig, att3.data.slot)
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test "Working with aggregates" & preset():
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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, getStateField(state.data, slot), 0.CommitteeIndex, cache)
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var
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att0 = makeAttestation(state[].data, state.blck.root, bc0[0], cache)
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att0x = att0
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att1 = makeAttestation(state[].data, state.blck.root, bc0[1], cache)
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att2 = makeAttestation(state[].data, state.blck.root, bc0[2], cache)
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att3 = makeAttestation(state[].data, state.blck.root, bc0[3], cache)
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# Both attestations include member 2 but neither is a subset of the other
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att0.combine(att2)
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att1.combine(att2)
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pool[].addAttestation(att0, @[bc0[0], bc0[2]], att0.loadSig, att0.data.slot)
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pool[].addAttestation(att1, @[bc0[1], bc0[2]], att1.loadSig, att1.data.slot)
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check:
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process_slots(
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defaultRuntimeConfig, state.data,
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getStateField(state.data, slot) + MIN_ATTESTATION_INCLUSION_DELAY, cache,
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rewards, {})
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check:
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pool[].getAttestationsForTestBlock(state[], cache).len() == 2
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# Can get either aggregate here, random!
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pool[].getAggregatedAttestation(1.Slot, 0.CommitteeIndex).isSome()
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# Add in attestation 3 - both aggregates should now have it added
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pool[].addAttestation(att3, @[bc0[3]], att3.loadSig, att3.data.slot)
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block:
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let attestations = pool[].getAttestationsForTestBlock(state[], cache)
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check:
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attestations.len() == 2
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attestations[0].aggregation_bits.countOnes() == 3
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# Can get either aggregate here, random!
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pool[].getAggregatedAttestation(1.Slot, 0.CommitteeIndex).isSome()
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# Add in attestation 0 as single - attestation 1 is now a superset of the
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# aggregates in the pool, so everything else should be removed
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pool[].addAttestation(att0x, @[bc0[0]], att0x.loadSig, att0x.data.slot)
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block:
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let attestations = pool[].getAttestationsForTestBlock(state[], cache)
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check:
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attestations.len() == 1
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attestations[0].aggregation_bits.countOnes() == 4
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pool[].getAggregatedAttestation(1.Slot, 0.CommitteeIndex).isSome()
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test "Everyone voting for something different" & preset():
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var attestations: int
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for i in 0..<SLOTS_PER_EPOCH:
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var root: Eth2Digest
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root.data[0..<8] = toBytesBE(i.uint64)
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let
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bc0 = get_beacon_committee(
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state[].data, getStateField(state.data, slot), 0.CommitteeIndex, cache)
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for j in 0..<bc0.len():
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root.data[8..<16] = toBytesBE(j.uint64)
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var att = makeAttestation(state[].data, root, bc0[j], cache)
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pool[].addAttestation(att, @[bc0[j]], att.loadSig, att.data.slot)
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inc attestations
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check:
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process_slots(
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defaultRuntimeConfig, state.data,
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getStateField(state.data, slot) + 1, cache, rewards, {})
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doAssert attestations.uint64 > MAX_ATTESTATIONS,
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"6*SLOTS_PER_EPOCH validators > 128 mainnet MAX_ATTESTATIONS"
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check:
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# Fill block with attestations
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pool[].getAttestationsForTestBlock(state[], cache).lenu64() ==
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MAX_ATTESTATIONS
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pool[].getAggregatedAttestation(
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getStateField(state.data, slot) - 1, 0.CommitteeIndex).isSome()
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test "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, getStateField(state.data, slot), 0.CommitteeIndex, cache)
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attestation0 = makeAttestation(state[].data, state.blck.root, bc0[0], cache)
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check:
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process_slots(
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defaultRuntimeConfig, state.data, getStateField(state.data, slot) + 1,
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cache, rewards, {})
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let
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bc1 = get_beacon_committee(state[].data,
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getStateField(state.data, slot), 0.CommitteeIndex, cache)
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attestation1 = makeAttestation(state[].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]], attestation1.loadSig, attestation1.data.slot)
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pool[].addAttestation(
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attestation0, @[bc0[0]], attestation0.loadSig, attestation0.data.slot)
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discard process_slots(
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defaultRuntimeConfig, state.data,
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MIN_ATTESTATION_INCLUSION_DELAY.Slot + 1, cache, rewards, {})
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let attestations = pool[].getAttestationsForTestBlock(state[], cache)
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check:
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attestations.len == 1
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test "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, getStateField(state.data, slot), 0.CommitteeIndex, cache)
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attestation0 =
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makeAttestation(state[].data, state.blck.root, bc0[0], cache)
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attestation1 =
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makeAttestation(state[].data, state.blck.root, bc0[1], cache)
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pool[].addAttestation(
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attestation0, @[bc0[0]], attestation0.loadSig, attestation0.data.slot)
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pool[].addAttestation(
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attestation1, @[bc0[1]], attestation1.loadSig, attestation1.data.slot)
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check:
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process_slots(
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defaultRuntimeConfig, state.data,
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MIN_ATTESTATION_INCLUSION_DELAY.Slot + 1, cache, rewards, {})
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let attestations = pool[].getAttestationsForTestBlock(state[], cache)
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check:
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attestations.len == 1
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test "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, getStateField(state.data, slot), 0.CommitteeIndex, cache)
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attestation0 =
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makeAttestation(state[].data, state.blck.root, bc0[0], cache)
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attestation1 =
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makeAttestation(state[].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]], attestation0.loadSig, attestation0.data.slot)
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pool[].addAttestation(
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attestation1, @[bc0[1]], attestation1.loadSig, attestation1.data.slot)
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check:
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process_slots(
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defaultRuntimeConfig, state.data,
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MIN_ATTESTATION_INCLUSION_DELAY.Slot + 1, cache, rewards, {})
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let attestations = pool[].getAttestationsForTestBlock(state[], cache)
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check:
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attestations.len == 1
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test "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,
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getStateField(state.data, slot), 0.CommitteeIndex, cache)
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attestation0 =
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makeAttestation(state[].data, state.blck.root, bc0[0], cache)
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attestation1 =
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makeAttestation(state[].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]], attestation1.loadSig, attestation1.data.slot)
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pool[].addAttestation(
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attestation0, @[bc0[0]], attestation0.loadSig, attestation0.data.slot)
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check:
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process_slots(
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defaultRuntimeConfig, state.data,
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MIN_ATTESTATION_INCLUSION_DELAY.Slot + 1, cache, rewards, {})
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let attestations = pool[].getAttestationsForTestBlock(state[], cache)
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check:
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attestations.len == 1
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test "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, dag.tail.root, cache)
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b1Add = dag.addRawBlock(quarantine, b1) do (
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blckRef: BlockRef, signedBlock: phase0.TrustedSignedBeaconBlock,
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epochRef: EpochRef):
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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 = dag.addRawBlock(quarantine, b2) do (
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blckRef: BlockRef, signedBlock: phase0.TrustedSignedBeaconBlock,
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epochRef: EpochRef):
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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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test "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, dag.tail.root, cache)
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b10Add = dag.addRawBlock(quarantine, b10) do (
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blckRef: BlockRef, signedBlock: phase0.TrustedSignedBeaconBlock,
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epochRef: EpochRef):
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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, dag.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 = dag.addRawBlock(quarantine, b11) do (
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blckRef: BlockRef, signedBlock: phase0.TrustedSignedBeaconBlock,
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epochRef: EpochRef):
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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, getStateField(state.data, slot) - 1, 1.CommitteeIndex,
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cache)
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attestation0 = makeAttestation(state[].data, b10.root, bc1[0], cache)
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pool[].addAttestation(
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attestation0, @[bc1[0]], attestation0.loadSig, 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, b11.root, bc1[1], cache)
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attestation2 = makeAttestation(state[].data, b11.root, bc1[2], cache)
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pool[].addAttestation(
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attestation1, @[bc1[1]], attestation1.loadSig, 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]], attestation2.loadSig, 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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test "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, dag.tail.root, cache)
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b10Add = dag.addRawBlock(quarantine, b10) do (
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blckRef: BlockRef, signedBlock: phase0.TrustedSignedBeaconBlock,
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epochRef: EpochRef):
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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 = dag.addRawBlock(quarantine, b10_clone) do (
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blckRef: BlockRef, signedBlock: phase0.TrustedSignedBeaconBlock,
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epochRef: EpochRef):
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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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test "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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dag.updateFlags.incl {skipBLSValidation}
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var cache = StateCache()
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let
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b10 = addTestBlock(state.data, dag.tail.root, cache)
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b10Add = dag.addRawBlock(quarantine, b10) do (
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blckRef: BlockRef, signedBlock: phase0.TrustedSignedBeaconBlock,
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epochRef: EpochRef):
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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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# -------------------------------------------------------------
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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, 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 = dag.addRawBlock(quarantine, new_block) do (
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blckRef: BlockRef, signedBlock: phase0.TrustedSignedBeaconBlock,
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epochRef: EpochRef):
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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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|
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let head = pool[].selectHead(blockRef[].slot)
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doAssert: head == blockRef[]
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dag.updateHead(head, quarantine)
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|
pruneAtFinalization(dag, pool[])
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|
|
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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, getStateField(state.data, slot), index.CommitteeIndex,
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|
cache)
|
|
|
|
# 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:
|
|
aggregation_bits[v] = true
|
|
|
|
attestations.add Attestation(
|
|
aggregation_bits: aggregation_bits,
|
|
data: makeAttestationData(
|
|
state[].data, getStateField(state.data, slot),
|
|
index.CommitteeIndex, blockroot)
|
|
# signature: ValidatorSig()
|
|
)
|
|
|
|
cache = StateCache()
|
|
|
|
# -------------------------------------------------------------
|
|
# Prune
|
|
|
|
doAssert: dag.finalizedHead.slot != 0
|
|
|
|
pool[].prune()
|
|
doAssert: b10.root notin pool.forkChoice.backend
|
|
|
|
# Add back the old block to ensure we have a duplicate error
|
|
let b10Add_clone = dag.addRawBlock(quarantine, b10_clone) do (
|
|
blckRef: BlockRef, signedBlock: phase0.TrustedSignedBeaconBlock,
|
|
epochRef: EpochRef):
|
|
# Callback add to fork choice if valid
|
|
pool[].addForkChoice(epochRef, blckRef, signedBlock.message, blckRef.slot)
|
|
|
|
doAssert: b10Add_clone.error == (ValidationResult.Ignore, Duplicate)
|