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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,
./testutil,
../beacon_chain/spec/[beaconstate, crypto, datatypes, digest, helpers],
../beacon_chain/[extras, state_transition, ssz]
suite "Block processing":
## 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_initial_beacon_state(
makeInitialDeposits(), 0, Eth1Data(), {})
genesisBlock = makeGenesisBlock(genesisState)
test "Passes from genesis state, no block":
var
state = genesisState
proposer_index = getNextBeaconProposerIndex(state)
previous_block_root = hash_tree_root_final(genesisBlock)
let block_ok =
updateState(state, previous_block_root, none(BeaconBlock), {})
check:
block_ok
state.slot == genesisState.slot + 1
# When proposer skips their proposal, randao layer is still peeled!
state.validator_registry[proposer_index].randao_layers ==
genesisState.validator_registry[proposer_index].randao_layers + 1
test "Passes from genesis state, empty block":
var
state = genesisState
proposer_index = getNextBeaconProposerIndex(state)
previous_block_root = hash_tree_root_final(genesisBlock)
new_block = makeBlock(state, previous_block_root, BeaconBlockBody())
let block_ok = updateState(
state, previous_block_root, some(new_block), {})
check:
block_ok
state.slot == genesisState.slot + 1
# Proposer proposed, no need for additional peeling
state.validator_registry[proposer_index].randao_layers ==
genesisState.validator_registry[proposer_index].randao_layers
test "Passes through epoch update, no block":
var
state = genesisState
previous_block_root = hash_tree_root_final(genesisBlock)
for i in 1..EPOCH_LENGTH.int:
let block_ok = updateState(
state, previous_block_root, none(BeaconBlock), {})
check:
block_ok
check:
state.slot == genesisState.slot + EPOCH_LENGTH
test "Passes through epoch update, empty block":
var
state = genesisState
previous_block_root = hash_tree_root_final(genesisBlock)
for i in 1..EPOCH_LENGTH.int:
var new_block = makeBlock(state, previous_block_root, BeaconBlockBody())
let block_ok = updateState(
state, previous_block_root, some(new_block), {})
check:
block_ok
previous_block_root = hash_tree_root_final(new_block)
check:
state.slot == genesisState.slot + EPOCH_LENGTH
test "Attestation gets processed at epoch":
var
state = genesisState
previous_block_root = hash_tree_root_final(genesisBlock)
# Slot 0 is a finalized slot - won't be making attestations for it..
discard updateState(
state, previous_block_root, none(BeaconBlock), {})
let
# Create an attestation for slot 1 signed by the only attester we have!
attestation = makeAttestation(
state, previous_block_root,
state.shard_committees_at_slots[state.slot][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 < MIN_ATTESTATION_INCLUSION_DELAY + 1:
discard updateState(
state, previous_block_root, none(BeaconBlock), {})
let
new_block = makeBlock(state, previous_block_root, BeaconBlockBody(
attestations: @[attestation]
))
discard updateState(state, previous_block_root, some(new_block), {})
check:
state.latest_attestations.len == 1
# TODO Can't run more than 127 for now:
# https://github.com/ethereum/eth2.0-specs/issues/352
while state.slot < 127:
discard updateState(
state, previous_block_root, none(BeaconBlock), {})
# Would need to process more epochs for the attestation to be removed from
# the state! (per above bug)
#
# check:
# state.latest_attestations.len == 0