nimbus-eth2/tests/test_state_transition.nim

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# beacon_chain
# Copyright (c) 2018 Status Research & Development GmbH
# Licensed and distributed under either of
# * MIT license (license terms in the root directory or at http://opensource.org/licenses/MIT).
# * Apache v2 license (license terms in the root directory or at http://www.apache.org/licenses/LICENSE-2.0).
# at your option. This file may not be copied, modified, or distributed except according to those terms.
import
options, sequtils, unittest, chronicles,
./testutil,
../beacon_chain/spec/[beaconstate, crypto, datatypes, digest, helpers, validator],
../beacon_chain/[extras, state_transition, ssz]
suite "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 = get_genesis_beacon_state(
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makeInitialDeposits(), 0, Eth1Data(), {})
genesisBlock = get_initial_beacon_block(genesisState)
genesisRoot = signing_root(genesisBlock)
test "Passes from genesis state, no block" & preset():
var
state = genesisState
advanceState(state)
check:
state.slot == genesisState.slot + 1
test "Passes from genesis state, empty block" & preset():
var
state = genesisState
previous_block_root = signing_root(genesisBlock)
new_block = makeBlock(state, previous_block_root, BeaconBlockBody())
let block_ok = updateState(state, new_block, {})
check:
block_ok
state.slot == genesisState.slot + 1
test "Passes through epoch update, no block" & preset():
var
state = genesisState
for i in 1..SLOTS_PER_EPOCH.int:
advanceState(state)
check:
state.slot == genesisState.slot + SLOTS_PER_EPOCH
test "Passes through epoch update, empty block" & preset():
var
state = genesisState
previous_block_root = genesisRoot
for i in 1..SLOTS_PER_EPOCH.int:
var new_block = makeBlock(state, previous_block_root, BeaconBlockBody())
let block_ok = updateState(state, new_block, {})
check:
block_ok
previous_block_root = signing_root(new_block)
check:
state.slot == genesisState.slot + SLOTS_PER_EPOCH
test "Attestation gets processed at epoch" & preset():
var
state = genesisState
previous_block_root = genesisRoot
# Slot 0 is a finalized slot - won't be making attestations for it..
advanceState(state)
let
# Create an attestation for slot 1 signed by the only attester we have!
crosslink_committees = get_crosslink_committees_at_slot(state, state.slot)
attestation = makeAttestation(
state, previous_block_root,
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crosslink_committees[0].committee[0])
# Some time needs to pass before attestations are included - this is
# to let the attestation propagate properly to interested participants
while state.slot < GENESIS_SLOT + MIN_ATTESTATION_INCLUSION_DELAY + 1:
advanceState(state)
let
new_block = makeBlock(state, previous_block_root, BeaconBlockBody(
attestations: @[attestation]
))
discard updateState(state, new_block, {})
check:
state.current_epoch_attestations.len == 1
while state.slot < 191:
advanceState(state)
# Would need to process more epochs for the attestation to be removed from
# the state! (per above bug)
#
# check:
# state.latest_attestations.len == 0