nimbus-eth2/tests/test_state_transition.nim

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# 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.
{.used.}
import
unittest, chronicles,
./testutil, ./testblockutil,
../beacon_chain/spec/[beaconstate, datatypes, digest, crypto,
validator, state_transition, presets],
../beacon_chain/ssz
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suiteReport "Block processing" & preset():
## For now just test that we can compile and execute block processing with
## mock data.
let
# Genesis state with minimal number of deposits
# TODO bls verification is a bit of a bottleneck here
genesisState = newClone(initialize_hashed_beacon_state_from_eth1(
defaultRuntimePreset, Eth2Digest(), 0, makeInitialDeposits(), {}))
genesisBlock = get_initial_beacon_block(genesisState.data)
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genesisRoot = hash_tree_root(genesisBlock.message)
setup:
var
state = newClone(genesisState[])
cache = StateCache()
timedTest "Passes from genesis state, no block" & preset():
check:
process_slots(state[], state.data.slot + 1, cache)
state.data.slot == genesisState.data.slot + 1
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timedTest "Passes from genesis state, empty block" & preset():
var
previous_block_root = genesisBlock.root
new_block = makeTestBlock(state[], previous_block_root, cache)
let block_ok = state_transition(defaultRuntimePreset, state[], new_block, {}, noRollback)
check:
block_ok
state.data.slot == genesisState.data.slot + 1
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timedTest "Passes through epoch update, no block" & preset():
check:
process_slots(state[], Slot(SLOTS_PER_EPOCH), cache)
state.data.slot == genesisState.data.slot + SLOTS_PER_EPOCH
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timedTest "Passes through epoch update, empty block" & preset():
var
previous_block_root = genesisRoot
cache = StateCache()
for i in 1..SLOTS_PER_EPOCH:
let new_block = makeTestBlock(state[], previous_block_root, cache)
let block_ok = state_transition(defaultRuntimePreset, state[], new_block, {}, noRollback)
check:
block_ok
previous_block_root = new_block.root
check:
state.data.slot == genesisState.data.slot + SLOTS_PER_EPOCH
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timedTest "Attestation gets processed at epoch" & preset():
var
previous_block_root = genesisRoot
cache = StateCache()
# Slot 0 is a finalized slot - won't be making attestations for it..
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check:
process_slots(state[], state.data.slot + 1, cache)
let
# Create an attestation for slot 1 signed by the only attester we have!
beacon_committee =
get_beacon_committee(state.data, state.data.slot, 0.CommitteeIndex, cache)
attestation = makeAttestation(
state.data, previous_block_root, beacon_committee[0], cache)
# Some time needs to pass before attestations are included - this is
# to let the attestation propagate properly to interested participants
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check:
process_slots(
state[], GENESIS_SLOT + MIN_ATTESTATION_INCLUSION_DELAY + 1, cache)
let
new_block = makeTestBlock(state[], previous_block_root, cache,
attestations = @[attestation]
)
check state_transition(defaultRuntimePreset, state[], new_block, {}, noRollback)
check:
# TODO epoch attestations can get multiplied now; clean up paths to
# enable exact 1-check again and keep finalization.
state.data.current_epoch_attestations.len >= 1
check:
process_slots(state[], Slot(191), cache)
# Would need to process more epochs for the attestation to be removed from
# the state! (per above bug)
#
# check:
# state.latest_attestations.len == 0