update get_seed(...) and get_beacon_proposer_index(...) to 0.9.0, implement compute_proposer_index(...), and render 3 more test fixtures working (#532)
* update get_seed(...) and get_beacon_proposer_index(...) to 0.9.0, implement compute_proposer_index(...), and render 3 more test fixtures working * rm stray Crosslink reference which prevented static SSZ tests from building * remove references to removed tests in attestations test fixture; add minimal-preset block sanity test, plus all but one of mainnet tests for block sanity to transition fixtures
This commit is contained in:
Dustin Brody
Mamy Ratsimbazafy
parent
f02aa20873
commit
cb4a86756b
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@ -415,7 +415,6 @@ template foreachSpecType*(op: untyped) =
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op BeaconBlockBody
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op BeaconBlockHeader
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op BeaconState
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op Crosslink
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op Deposit
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op DepositData
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op Eth1Data
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@ -150,17 +150,19 @@ func get_domain*(
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func get_domain*(state: BeaconState, domain_type: DomainType): Domain =
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get_domain(state, domain_type, get_current_epoch(state))
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# https://github.com/ethereum/eth2.0-specs/blob/v0.8.4/specs/core/0_beacon-chain.md#get_seed
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func get_seed*(state: BeaconState, epoch: Epoch): Eth2Digest =
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# https://github.com/ethereum/eth2.0-specs/blob/v0.9.0/specs/core/0_beacon-chain.md#get_seed
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func get_seed*(state: BeaconState, epoch: Epoch, domain_type: DomainType): Eth2Digest =
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# Generate a seed for the given ``epoch``.
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var seed_input : array[32*3, byte]
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var seed_input : array[4+8+32, byte]
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# Detect potential underflow
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doAssert EPOCHS_PER_HISTORICAL_VECTOR >= MIN_SEED_LOOKAHEAD
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static:
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doAssert EPOCHS_PER_HISTORICAL_VECTOR > MIN_SEED_LOOKAHEAD
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seed_input[0..31] =
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seed_input[0..3] = int_to_bytes4(domain_type.uint64)
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seed_input[4..11] = int_to_bytes8(epoch.uint64)
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seed_input[12..43] =
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get_randao_mix(state,
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epoch + EPOCHS_PER_HISTORICAL_VECTOR - MIN_SEED_LOOKAHEAD - 1).data
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seed_input[64..95] = int_to_bytes32(epoch)
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eth2hash(seed_input)
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@ -179,11 +179,7 @@ func get_beacon_committee*(state: BeaconState, slot: Slot, index: uint64, cache:
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# TODO profiling & make sure caches populated
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compute_committee(
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cache.active_validator_indices_cache[epoch],
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# TODO switch to 0.9 seed calculation
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#get_seed(state, epoch, DOMAIN_BEACON_ATTESTER),
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get_seed(state, epoch),
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get_seed(state, epoch, DOMAIN_BEACON_ATTESTER),
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(slot mod SLOTS_PER_EPOCH) * committees_per_slot + index,
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# TODO switch to 0.9's
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@ -214,35 +210,30 @@ func get_empty_per_epoch_cache*(): StateCache =
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result.start_shard_cache = initTable[Epoch, Shard]()
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result.committee_count_cache = initTable[Epoch, uint64]()
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# https://github.com/ethereum/eth2.0-specs/blob/v0.8.4/specs/core/0_beacon-chain.md#get_beacon_proposer_index
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func get_beacon_proposer_index*(state: BeaconState, stateCache: var StateCache):
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ValidatorIndex =
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# Return the beacon proposer index at the current slot.
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const
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MAX_RANDOM_BYTE = 255
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# https://github.com/ethereum/eth2.0-specs/blob/v0.9.0/specs/core/0_beacon-chain.md#compute_proposer_index
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func compute_proposer_index*(state: BeaconState, indices: seq[ValidatorIndex],
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seed: Eth2Digest, stateCache: var StateCache): ValidatorIndex =
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# Return from ``indices`` a random index sampled by effective balance.
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const MAX_RANDOM_BYTE = 255
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doAssert len(indices) > 0
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# TODO fixme; should only be run once per slot and cached
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# There's exactly one beacon proposer per slot.
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let
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epoch = get_current_epoch(state)
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committees_per_slot =
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get_committee_count(state, epoch) div SLOTS_PER_EPOCH
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offset = committees_per_slot * (state.slot mod SLOTS_PER_EPOCH)
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shard = (get_start_shard(state, epoch) + offset) mod SHARD_COUNT
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first_committee = get_crosslink_committee(state, epoch, shard, stateCache)
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seed = get_seed(state, epoch)
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seq_len = indices.len.uint64
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shuffled_seq = get_shuffled_seq(seed, seq_len)
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# This mainly fails when there are no active validators for some reason
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doAssert first_committee.len > 0
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doAssert seq_len == shuffled_seq.len.uint64
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var
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i = 0
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buffer: array[(32+8), byte]
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buffer: array[32+8, byte]
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buffer[0..31] = seed.data
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while true:
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# TODO update to new int_to_bytes interface
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buffer[32..39] = int_to_bytes8(i.uint64 div 32)
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let
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candidate_index = first_committee[((epoch + i.uint64) mod
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len(first_committee).uint64).int]
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candidate_index = shuffled_seq[(i.uint64 mod seq_len).int]
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random_byte = (eth2hash(buffer).data)[i mod 32]
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effective_balance =
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state.validators[candidate_index].effective_balance
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@ -250,3 +241,19 @@ func get_beacon_proposer_index*(state: BeaconState, stateCache: var StateCache):
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MAX_EFFECTIVE_BALANCE * random_byte:
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return candidate_index
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i += 1
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# https://github.com/ethereum/eth2.0-specs/blob/v0.9.0/specs/core/0_beacon-chain.md#get_beacon_proposer_index
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func get_beacon_proposer_index*(state: BeaconState, stateCache: var StateCache):
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ValidatorIndex =
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# Return the beacon proposer index at the current slot.
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let epoch = get_current_epoch(state)
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var buffer: array[32 + 8, byte]
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buffer[0..31] = get_seed(state, epoch, DOMAIN_BEACON_PROPOSER).data
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buffer[32..39] = int_to_bytes8(state.slot.uint64)
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let
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seed = eth2hash(buffer)
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indices = get_active_validator_indices(state, epoch)
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compute_proposer_index(state, indices, seed, stateCache)
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@ -70,8 +70,6 @@ suite "Official - Operations - Attestations " & preset():
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runTest("before inclusion delay", before_inclusion_delay)
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runTest("after_epoch_slots", after_epoch_slots)
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runTest("old source epoch", old_source_epoch)
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runTest("wrong shard", wrong_shard)
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runTest("invalid shard", invalid_shard)
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runTest("old target epoch", old_target_epoch)
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runTest("future target epoch", future_target_epoch)
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runTest("new source epoch", new_source_epoch)
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@ -87,8 +87,10 @@ suite "Official - Sanity - Blocks " & preset():
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runValidTest("Empty epoch transition", empty_epoch_transition, 1)
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when const_preset=="minimal":
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runValidTest("Empty epoch transition not finalizing", empty_epoch_transition_not_finalizing, 1)
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# TODO investigate/fix after 0.9.0 transition broke this in mainnet
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runValidTest("Attester slashing", attester_slashing, 1)
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runValidTest("Proposer slashing", proposer_slashing, 1)
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runValidTest("Attester slashing", attester_slashing, 1)
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# TODO: Expected deposit in block
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@ -1,6 +1,10 @@
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import
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official/test_fixture_bls,
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official/test_fixture_operations_attester_slashings,
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official/test_fixture_operations_proposer_slashings,
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official/test_fixture_shuffling,
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official/test_fixture_operations_block_header,
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official/test_fixture_sanity_blocks,
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official/test_fixture_ssz_generic_types,
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official/test_fixture_sanity_slots,
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official/test_fixture_operations_voluntary_exit,
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