def test_uncle_block_inclusion_validity(vm_fn):
# This test ensures that a forked block which is behind by
# more than 6 layers cannot act as an ancestor to the current block
OTHER_MINER_ADDRESS = 20 * b'\x01'
chain = build(
MiningChain,
vm_fn(0),
disable_pow_check(),
genesis(),
mine_block(), # 1
mine_block(), # 2
)
fork_chain = build(
chain,
at_block_number(1),
mine_block(extra_data=b'fork-it!',
coinbase=OTHER_MINER_ADDRESS), # fork 2
)
# we don't use canonical head here because the fork chain is non-canonical.
uncle = fork_chain.get_block_header_by_hash(fork_chain.header.parent_hash)
assert uncle.block_number == 2
with pytest.raises(ValidationError):
chain = build(
chain,
# Mines blocks from 3 to 8 (both numbers inclusive)
mine_blocks(6),
# Mine block 9 with uncle
mine_block(uncles=[uncle]),
)
def get_chain(vm: Type[BaseVM], genesis_state: GenesisState) -> MiningChain:
chain = build(MiningChain, fork_at(vm, constants.GENESIS_BLOCK_NUMBER),
disable_pow_check(),
genesis(params=GENESIS_PARAMS, state=genesis_state))
return chain
def test_eip1559_txn_rewards(max_total_price, max_priority_price,
expected_miner_tips, funded_address,
funded_address_private_key):
chain = build(
MiningChain,
berlin_at(0),
london_at(1), # Start London at block one to get easy 1gwei base fee
disable_pow_check(),
genesis(
params=dict(gas_limit=10**7),
state={funded_address: dict(balance=10**20)},
),
)
vm = chain.get_vm()
txn = new_dynamic_fee_transaction(
vm,
from_=funded_address,
to=funded_address,
private_key=funded_address_private_key,
max_priority_fee_per_gas=max_priority_price,
max_fee_per_gas=max_total_price,
)
MINER = b'\x0f' * 20
original_balance = vm.state.get_balance(MINER)
chain.mine_all([txn], coinbase=MINER)
new_balance = chain.get_vm().state.get_balance(MINER)
BLOCK_REWARD = 2 * (10**18)
assert original_balance + BLOCK_REWARD + expected_miner_tips == new_balance
def bob_chain():
chain = build(
MiningChain,
latest_mainnet_at(0),
disable_pow_check(),
genesis(),
)
return chain
def alice_chain(bob_chain):
bob_genesis = bob_chain.headerdb.get_canonical_block_header_by_number(0)
chain = build(
MiningChain,
latest_mainnet_at(0),
disable_pow_check(),
genesis(params={"timestamp": bob_genesis.timestamp}),
)
return chain
def test_rewards_nephew_uncle_different_vm(vm_fn_uncle, vm_fn_nephew,
miner_1_balance, miner_2_balance):
OTHER_MINER_ADDRESS = 20 * b'\x01'
TOTAL_BLOCKS_CANONICAL_CHAIN = 10
VM_CHANGE_BLOCK_NUMBER = 4
chain = build(
MiningChain,
vm_fn_uncle(0),
vm_fn_nephew(VM_CHANGE_BLOCK_NUMBER),
disable_pow_check(),
genesis(),
mine_blocks(TOTAL_BLOCKS_CANONICAL_CHAIN - 1),
)
fork_chain = build(
chain,
at_block_number(3),
mine_block(extra_data=b'fork-it!',
coinbase=OTHER_MINER_ADDRESS), # fork 2
)
# we don't use canonical head here because the fork chain is non-canonical.
uncle = fork_chain.get_block_header_by_hash(fork_chain.header.parent_hash)
assert uncle.block_number == 4
chain = build(
chain,
mine_block(uncles=[uncle]),
)
header = chain.get_canonical_head()
block = chain.get_block_by_hash(header.hash)
assert len(block.uncles) == 1
assert block.uncles[0] == uncle
vm = chain.get_vm()
coinbase_balance = vm.state.get_balance(block.header.coinbase)
other_miner_balance = vm.state.get_balance(uncle.coinbase)
uncle_vm = chain.get_vm_class_for_block_number(0)
nephew_vm = chain.get_vm_class_for_block_number(VM_CHANGE_BLOCK_NUMBER)
# We first test if the balance matches what we would determine
# if we made all the API calls involved ourselves.
assert coinbase_balance == (uncle_vm.get_block_reward() * 3 +
nephew_vm.get_block_reward() *
(TOTAL_BLOCKS_CANONICAL_CHAIN - 3) +
vm.get_nephew_reward())
assert other_miner_balance == vm.get_uncle_reward(block.number, uncle)
# But we also ensure the balance matches the numbers that we calculated on paper
assert coinbase_balance == to_wei(miner_1_balance, 'ether')
assert other_miner_balance == to_wei(miner_2_balance, 'ether')
def get_chain(vm: Type[VirtualMachineAPI],
genesis_state: GenesisState) -> Iterable[MiningChain]:
with tempfile.TemporaryDirectory() as temp_dir:
level_db_obj = LevelDB(Path(temp_dir))
level_db_chain = build(
MiningChain, fork_at(vm, constants.GENESIS_BLOCK_NUMBER),
disable_pow_check(),
genesis(db=level_db_obj,
params=GENESIS_PARAMS,
state=genesis_state))
yield level_db_chain
def test_chain_builder_disable_pow_check():
chain = build(
MiningChain,
frontier_at(0),
disable_pow_check(),
genesis(),
)
block = chain.mine_block()
with pytest.raises(ValidationError, match='mix hash mismatch'):
check_pow(
block.number,
block.header.mining_hash,
block.header.mix_hash,
block.header.nonce,
block.header.difficulty,
)
def test_chain_builder_disable_pow_check():
chain = build(
MiningChain,
frontier_at(0),
disable_pow_check(),
genesis(),
)
block = chain.mine_block()
# check_eccpow(
# block.header.parent_hash,
# block.header.mining_hash,
# 24, 3, 6)
with pytest.raises(ValidationError, match='mix hash mismatch'):
# ToDo: Have to change difficulty
check_eccpow(block.header.parent_hash, block.header.mining_hash, 24, 3,
6)
def test_rewards_uncle_created_at_different_generations(
vm_fn, fork_at_block_number, miner_1_balance, miner_2_balance):
OTHER_MINER_ADDRESS = 20 * b'\x01'
TOTAL_BLOCKS_CANONICAL_CHAIN = 10
chain = build(
MiningChain,
vm_fn(0),
disable_pow_check(),
genesis(),
mine_blocks(TOTAL_BLOCKS_CANONICAL_CHAIN - 1),
)
fork_chain = build(
chain,
at_block_number(fork_at_block_number),
mine_block(extra_data=b'fork-it!',
coinbase=OTHER_MINER_ADDRESS), # fork 2
)
# we don't use canonical head here because the fork chain is non-canonical.
uncle = fork_chain.get_block_header_by_hash(fork_chain.header.parent_hash)
assert uncle.block_number == fork_at_block_number + 1
chain = build(
chain,
mine_block(uncles=[uncle]),
)
header = chain.get_canonical_head()
block = chain.get_block_by_hash(header.hash)
vm = chain.get_vm()
coinbase_balance = vm.state.account_db.get_balance(block.header.coinbase)
other_miner_balance = vm.state.account_db.get_balance(uncle.coinbase)
# We first test if the balance matches what we would determine
# if we made all the API calls involved ourselves.
assert coinbase_balance == (
vm.get_block_reward() * TOTAL_BLOCKS_CANONICAL_CHAIN +
vm.get_nephew_reward())
assert other_miner_balance == vm.get_uncle_reward(block.number, uncle)
# But we also ensure the balance matches the numbers that we calculated on paper
assert coinbase_balance == to_wei(miner_1_balance, 'ether')
assert other_miner_balance == to_wei(miner_2_balance, 'ether')
def new_chain_from_fixture(fixture, chain_cls=MainnetChain):
base_db = AtomicDB()
vm_config = chain_vm_configuration(fixture)
ChainFromFixture = chain_cls.configure(
'ChainFromFixture',
vm_configuration=vm_config,
)
if 'sealEngine' in fixture and fixture['sealEngine'] == 'NoProof':
ChainFromFixture = disable_pow_check(ChainFromFixture)
return ChainFromFixture.from_genesis(
base_db,
genesis_params=genesis_params_from_fixture(fixture),
genesis_state=fixture['pre'],
)
def test_disabling_pow_for_already_pow_disabled_chain(chain):
pow_disabled_chain = disable_pow_check(chain)
assert issubclass(pow_disabled_chain, NoChainSealValidationMixin)
again_pow_disabled_chain = disable_pow_check(pow_disabled_chain)
assert issubclass(again_pow_disabled_chain, NoChainSealValidationMixin)