def test_chain_builder_build_uncle_fork(mining_chain):
chain = build(
mining_chain,
mine_block(), # 1
mine_block(), # 2
)
fork_chain = build(
chain,
at_block_number(1),
mine_block(extra_data=b'fork-it!'), # 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
assert uncle != chain.get_canonical_head()
chain = build(
chain,
mine_block(uncles=[uncle]), # 3
)
header = chain.get_canonical_head()
block = chain.get_block_by_hash(header.hash)
assert len(block.uncles) == 1
assert block.uncles[0] == uncle
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 test_chain_builder_at_block_number(mining_chain):
pre_fork_chain = build(
mining_chain,
mine_block(), # 1
mine_block(), # 2
mine_block(), # 3
)
block_1 = pre_fork_chain.get_canonical_block_by_number(1)
block_2 = pre_fork_chain.get_canonical_block_by_number(2)
block_3 = pre_fork_chain.get_canonical_block_by_number(3)
chain = build(
pre_fork_chain,
at_block_number(2),
mine_block(extra_data=b'fork-it!'), # fork 3
mine_block(), # fork 4
mine_block(), # fork 5
)
# ensure that our chain is ahead of the pre_fork_chain
head = chain.get_canonical_head()
assert head.block_number == 5
pre_fork_head = pre_fork_chain.get_canonical_head()
assert pre_fork_head.block_number == 3
f_block_1 = chain.get_canonical_block_by_number(1)
f_block_2 = chain.get_canonical_block_by_number(2)
f_block_3 = chain.get_canonical_block_by_number(3)
# verify that the fork diverges from the pre_fork_chain
assert f_block_1 == block_1
assert f_block_2 == block_2
assert f_block_3 != block_3
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 _create(cls, model_class: Type[AsyncHeaderDB], *args: Any,
**kwargs: Any) -> AsyncHeaderDB:
headerdb = model_class(*args, **kwargs)
from eth.chains.base import Chain
from eth.tools.builder.chain import build, latest_mainnet_at, genesis
build(
Chain,
latest_mainnet_at(0),
genesis(db=headerdb.db),
)
return headerdb
def _create(cls, model_class: Type[AsyncHeaderDB], *args: Any,
**kwargs: Any) -> AsyncHeaderDB:
from eth.chains.base import Chain
from eth.tools.builder.chain import build, latest_mainnet_at, genesis
genesis_params = kwargs.pop('genesis_params', None)
headerdb = model_class(*args, **kwargs)
build(
Chain,
latest_mainnet_at(0),
genesis(db=headerdb.db, params=genesis_params),
)
return headerdb
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 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_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 bob_chain():
chain = build(
MiningChain,
latest_mainnet_at(0),
disable_pow_check(),
genesis(),
)
return chain
def test_chain_builder_mine_block_with_parameters(mining_chain):
chain = build(
mining_chain,
mine_block(extra_data=b'test-setting-extra-data'),
)
header = chain.get_canonical_head()
assert header.extra_data == b'test-setting-extra-data'
def test_chain_builder_construct_chain_name():
chain = build(
MiningChain,
name('ChainForTest'),
)
assert issubclass(chain, MiningChain)
assert chain.__name__ == 'ChainForTest'
def test_chain_builder_build_single_default_block(mining_chain):
chain = build(
mining_chain,
mine_block(),
)
header = chain.get_canonical_head()
assert header.block_number == 1
def test_chain_builder_build_mine_multiple_blocks(mining_chain):
chain = build(
mining_chain,
mine_blocks(5),
)
header = chain.get_canonical_head()
assert header.block_number == 5
def test_chain_builder_without_any_mining_config():
chain = build(
MiningChain,
frontier_at(0),
genesis(),
)
with pytest.raises(ValidationError, match='mix hash mismatch'):
chain.mine_block()
def _create(cls, model_class: Type[AsyncHeaderDB], *args: Any,
**kwargs: Any) -> AsyncHeaderDB:
from eth.chains.base import Chain
from eth.tools.builder.chain import build, latest_mainnet_at, genesis
genesis_params = kwargs.pop('genesis_params', None)
headerdb = model_class(*args, **kwargs)
# SIDE EFFECT!
# This uses the side effect of initializing a chain using the `builder`
# tool to populate the genesis state into the database.
build(
Chain,
latest_mainnet_at(0),
genesis(db=headerdb.db, params=genesis_params),
)
return headerdb
def test_chain_import_blocks_many(mining_chain):
temp_chain = build(
mining_chain,
copy(),
mine_blocks(3),
)
block_1, block_2, block_3 = (
temp_chain.get_canonical_block_by_number(1),
temp_chain.get_canonical_block_by_number(2),
temp_chain.get_canonical_block_by_number(3),
)
chain = build(
mining_chain,
import_blocks(block_1, block_2, block_3),
)
head = chain.get_canonical_head()
assert head == block_3.header
def test_chain_builder_enable_pow_mining():
chain = build(
MiningChain,
frontier_at(0),
enable_pow_mining(),
genesis(),
)
block = chain.mine_block()
check_eccpow(block.header.parent_hash, block.header.mining_hash, 24, 3, 6)
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
async def test_handshake_with_incompatible_fork_id(alice_chain, bob_chain):
alice_chain = build(alice_chain, mine_block())
pair_factory = ETHPeerPairFactory(alice_peer_context=ChainContextFactory(
headerdb=AsyncHeaderDB(alice_chain.headerdb.db),
vm_configuration=((1, PetersburgVM), (2, MuirGlacierVM))), )
with pytest.raises(WrongForkIDFailure):
async with pair_factory as (alice, bob):
pass
def test_chain_builder_construct_chain_vm_configuration_single_fork():
chain = build(
MiningChain,
fork_at(FrontierVM, 0),
)
assert issubclass(chain, MiningChain)
assert len(chain.vm_configuration) == 1
assert chain.vm_configuration[0][0] == 0
assert chain.vm_configuration[0][1] == FrontierVM
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_construct_chain_vm_configuration_multiple_forks():
chain = build(
MiningChain,
fork_at(FrontierVM, 0),
fork_at(HomesteadVM, 5),
)
assert issubclass(chain, MiningChain)
assert len(chain.vm_configuration) == 2
assert chain.vm_configuration[0][0] == 0
assert chain.vm_configuration[0][1] == FrontierVM
assert chain.vm_configuration[1][0] == 5
assert chain.vm_configuration[1][1] == HomesteadVM
async def test_eth_api_head_info_updates_with_announce(alice, bob,
common_base_chain,
LESAPI_class):
# bob mines two blocks on his chain
got_announce = asyncio.Event()
async def _handle_announce(connection, msg):
got_announce.set()
alice.connection.add_command_handler(Announce, _handle_announce)
bob_genesis = common_base_chain.headerdb.get_canonical_block_header_by_number(
0)
assert alice.connection.has_logic(LESAPI_class.name)
les_api = alice.connection.get_logic(LESAPI_class.name, LESAPI_class)
assert les_api.head_info.head_hash == bob_genesis.hash
assert les_api.head_info.head_td == bob_genesis.difficulty
assert les_api.head_info.head_number == 0
bob_chain = build(
common_base_chain,
mine_block(),
mine_block(),
)
head = bob_chain.get_canonical_head()
les_proto = bob.les_api.protocol
assert isinstance(les_proto, BaseLESProtocol)
assert head.block_number == 2
total_difficulty = bob_chain.headerdb.get_score(head.hash)
les_proto.send(
Announce(
AnnouncePayload(
head_hash=head.hash,
head_number=head.block_number,
head_td=total_difficulty,
reorg_depth=0,
params=(),
)))
await asyncio.wait_for(got_announce.wait(), timeout=1)
await asyncio.sleep(0.1)
assert les_api.head_info.head_hash == head.hash
assert les_api.head_info.head_td == total_difficulty
assert les_api.head_info.head_number == 2
def test_chain_builder_enable_pow_mining():
chain = build(
MiningChain,
frontier_at(0),
enable_pow_mining(),
genesis(),
)
block = chain.mine_block()
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_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_mine_block_with_transactions(
mining_chain, funded_address, funded_address_private_key):
tx = new_transaction(
mining_chain.get_vm(),
from_=funded_address,
to=ZERO_ADDRESS,
private_key=funded_address_private_key,
)
chain = build(
mining_chain,
mine_block(transactions=[tx]),
)
block = chain.get_canonical_block_by_number(1)
assert len(block.transactions) == 1
assert block.transactions[0] == tx
def test_chain_builder_construct_chain_fork_specific_helpers(
fork_fn, vm_class):
class DummyVM(FrontierVM):
pass
class ChainForTest(MiningChain):
vm_configuration = ((0, DummyVM), )
chain = build(
ChainForTest,
fork_fn(12),
)
assert issubclass(chain, MiningChain)
assert len(chain.vm_configuration) == 2
assert chain.vm_configuration[0][0] == 0
assert chain.vm_configuration[0][1] is DummyVM
assert chain.vm_configuration[1][0] == 12
assert chain.vm_configuration[1][1] is vm_class
def load_mining_chain(db):
GENESIS_PARAMS = {
'coinbase': constants.ZERO_ADDRESS,
'difficulty': 5,
'gas_limit': 3141592,
'timestamp': 1514764800,
}
GENESIS_STATE = {
FUNDED_ACCT.public_key.to_canonical_address(): {
"balance": 100000000000000000,
}
}
return build(
FakeAsyncChain,
byzantium_at(0),
enable_pow_mining(),
genesis(db=db, params=GENESIS_PARAMS, state=GENESIS_STATE),
)
