def test_configure_duplicate_block_numbers_in_vm_configuration():
with pytest.raises(ValidationError):
Chain.configure('TestChain',
vm_configuration=[
(0, FrontierVM),
(0, HomesteadVM),
])
def test_vm_not_found_if_no_matching_block_number():
chain_class = Chain.configure('TestChain', vm_configuration=(
(10, FrontierVM),
))
chain = chain_class(get_db_backend(), BlockHeader(1, 0, 100))
with pytest.raises(VMNotFound):
chain.get_vm_class_for_block_number(9)
def chain_without_block_validation():
"""
Return a Chain object containing just the genesis block.
This Chain does not perform any validation when importing new blocks.
The Chain's state includes one funded account and a private key for it, which can be found in
the funded_address and private_keys variables in the chain itself.
"""
# Disable block validation so that we don't need to construct finalized blocks.
overrides = {
'ensure_blocks_are_equal': lambda self, b1, b2: None,
'validate_block': lambda self, block: None,
}
klass = Chain.configure(
name='TestChainWithoutBlockValidation',
vm_configuration=((constants.GENESIS_BLOCK_NUMBER, FrontierVM), ),
**overrides,
)
private_key = decode_hex(
'0x45a915e4d060149eb4365960e6a7a45f334393093061116b197e3240065ff2d8')
funded_addr = private_key_to_address(private_key)
initial_balance = 100000000
genesis_params = {
'block_number':
constants.GENESIS_BLOCK_NUMBER,
'difficulty':
constants.GENESIS_DIFFICULTY,
'gas_limit':
constants.GENESIS_GAS_LIMIT,
'parent_hash':
constants.GENESIS_PARENT_HASH,
'coinbase':
constants.GENESIS_COINBASE,
'nonce':
constants.GENESIS_NONCE,
'mix_hash':
constants.GENESIS_MIX_HASH,
'extra_data':
constants.GENESIS_EXTRA_DATA,
'timestamp':
1501851927,
'state_root':
decode_hex(
'0x9d354f9b5ba851a35eced279ef377111387197581429cfcc7f744ef89a30b5d4'
)
}
genesis_state = {
funded_addr: {
'balance': initial_balance,
'nonce': 0,
'code': b'',
'storage': {},
}
}
chain = klass.from_genesis(get_db_backend(), genesis_params, genesis_state)
chain.funded_address = funded_addr
chain.funded_address_initial_balance = initial_balance
chain.funded_address_private_key = private_key
return chain
def test_vm_not_found_if_no_matching_block_number():
chain_class = Chain.configure('TestChain', vm_configuration=(
(10, FrontierVM),
))
chain = chain_class(get_db_backend(), BlockHeader(1, 0, 100))
with pytest.raises(VMNotFound):
chain.get_vm_class_for_block_number(9)
def chain_without_pow(base_db: MemoryDB, vm: Type[BaseVM], genesis_params: Any,
genesis_state: Any) -> Chain:
vm_without_pow = vm.configure(validate_seal=lambda block: None)
klass = Chain.configure(__name__='TestChain',
vm_configuration=((constants.GENESIS_BLOCK_NUMBER,
vm_without_pow), ))
chain = klass.from_genesis(base_db, genesis_params, genesis_state)
return chain
def test_get_vm_class_for_block_number():
chain_class = Chain.configure(vm_configuration=(
(constants.GENESIS_BLOCK_NUMBER, FrontierVM),
(constants.HOMESTEAD_MAINNET_BLOCK, HomesteadVM),
), )
chain = chain_class(get_db_backend(), BlockHeader(1, 0, 100))
assert chain.get_vm_class_for_block_number(
constants.GENESIS_BLOCK_NUMBER, ) == FrontierVM
assert chain.get_vm_class_for_block_number(
constants.HOMESTEAD_MAINNET_BLOCK - 1) == FrontierVM
assert chain.get_vm_class_for_block_number(
constants.HOMESTEAD_MAINNET_BLOCK) == HomesteadVM
assert chain.get_vm_class_for_block_number(
constants.HOMESTEAD_MAINNET_BLOCK + 1) == HomesteadVM
def test_get_vm_class_for_block_number():
chain_class = Chain.configure(
name='TestChain',
vm_configuration=(
(constants.GENESIS_BLOCK_NUMBER, FrontierVM),
(HOMESTEAD_MAINNET_BLOCK, HomesteadVM),
),
)
chain = chain_class(get_db_backend(), BlockHeader(1, 0, 100))
assert chain.get_vm_class_for_block_number(
constants.GENESIS_BLOCK_NUMBER,) == FrontierVM
assert chain.get_vm_class_for_block_number(
HOMESTEAD_MAINNET_BLOCK - 1) == FrontierVM
assert chain.get_vm_class_for_block_number(
HOMESTEAD_MAINNET_BLOCK) == HomesteadVM
assert chain.get_vm_class_for_block_number(
HOMESTEAD_MAINNET_BLOCK + 1) == HomesteadVM
def chain_without_block_validation(base_db, funded_address,
funded_address_initial_balance):
"""
Return a Chain object containing just the genesis block.
This Chain does not perform any validation when importing new blocks.
The Chain's state includes one funded account and a private key for it,
which can be found in the funded_address and private_keys variables in the
chain itself.
"""
# Disable block validation so that we don't need to construct finalized blocks.
overrides = {
'import_block': import_block_without_validation,
'validate_block': lambda self, block: None,
}
SpuriousDragonVMForTesting = SpuriousDragonVM.configure(
validate_seal=lambda self, block: None)
klass = Chain.configure(
__name__='TestChainWithoutBlockValidation',
vm_configuration=((constants.GENESIS_BLOCK_NUMBER,
SpuriousDragonVMForTesting), ),
**overrides,
)
genesis_params = {
'block_number': constants.GENESIS_BLOCK_NUMBER,
'difficulty': constants.GENESIS_DIFFICULTY,
'gas_limit': constants.GENESIS_GAS_LIMIT,
'parent_hash': constants.GENESIS_PARENT_HASH,
'coinbase': constants.GENESIS_COINBASE,
'nonce': constants.GENESIS_NONCE,
'mix_hash': constants.GENESIS_MIX_HASH,
'extra_data': constants.GENESIS_EXTRA_DATA,
'timestamp': 1501851927,
}
genesis_state = {
funded_address: {
'balance': funded_address_initial_balance,
'nonce': 0,
'code': b'',
'storage': {},
}
}
chain = klass.from_genesis(base_db, genesis_params, genesis_state)
return chain
def chain_with_block_validation(base_db, funded_address, funded_address_initial_balance):
"""
Return a Chain object containing just the genesis block.
The Chain's state includes one funded account, which can be found in the
funded_address in the chain itself.
This Chain will perform all validations when importing new blocks, so only
valid and finalized blocks can be used with it. If you want to test
importing arbitrarily constructe, not finalized blocks, use the
chain_without_block_validation fixture instead.
"""
genesis_params = {
"bloom": 0,
"coinbase": to_canonical_address("8888f1f195afa192cfee860698584c030f4c9db1"),
"difficulty": 131072,
"extra_data": b"B",
"gas_limit": 3141592,
"gas_used": 0,
"mix_hash": decode_hex("56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421"), # noqa: E501
"nonce": decode_hex("0102030405060708"),
"block_number": 0,
"parent_hash": decode_hex("0000000000000000000000000000000000000000000000000000000000000000"), # noqa: E501
"receipt_root": decode_hex("56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421"), # noqa: E501
"timestamp": 1422494849,
"transaction_root": decode_hex("56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421"), # noqa: E501
"uncles_hash": decode_hex("1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347") # noqa: E501
}
genesis_state = {
funded_address: {
"balance": funded_address_initial_balance,
"nonce": 0,
"code": b"",
"storage": {}
}
}
klass = Chain.configure(
__name__='TestChain',
vm_configuration=(
(constants.GENESIS_BLOCK_NUMBER, SpuriousDragonVM),
),
network_id=1337,
)
chain = klass.from_genesis(base_db, genesis_params, genesis_state)
return chain
def test_configure_duplicate_block_numbers_in_vm_configuration():
with pytest.raises(ValidationError):
Chain.configure('TestChain', vm_configuration=[
(0, FrontierVM),
(0, HomesteadVM),
])
def test_header_chain_invalid_if_no_vm_configuration(base_db, genesis_header):
chain_class = Chain.configure('ChainNoEmptyConfiguration', vm_configuration=())
with pytest.raises(ValueError):
chain_class(base_db, genesis_header)
def chain():
"""
Return a Chain object containing just the genesis block.
The Chain's state includes one funded account, which can be found in the funded_address in the
chain itself.
This Chain will perform all validations when importing new blocks, so only valid and finalized
blocks can be used with it. If you want to test importing arbitrarily constructe, not
finalized blocks, use the chain_without_block_validation fixture instead.
"""
genesis_params = {
"bloom":
0,
"coinbase":
to_canonical_address("8888f1f195afa192cfee860698584c030f4c9db1"),
"difficulty":
131072,
"extra_data":
b"B",
"gas_limit":
3141592,
"gas_used":
0,
"mix_hash":
decode_hex(
"56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421"
),
"nonce":
decode_hex("0102030405060708"),
"block_number":
0,
"parent_hash":
decode_hex(
"0000000000000000000000000000000000000000000000000000000000000000"
),
"receipt_root":
decode_hex(
"56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421"
),
"state_root":
decode_hex(
"cafd881ab193703b83816c49ff6c2bf6ba6f464a1be560c42106128c8dbc35e7"
),
"timestamp":
1422494849,
"transaction_root":
decode_hex(
"56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421"
),
"uncles_hash":
decode_hex(
"1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347")
}
funded_addr = to_canonical_address(
"a94f5374fce5edbc8e2a8697c15331677e6ebf0b")
initial_balance = 10000000000
genesis_state = {
funded_addr: {
"balance": initial_balance,
"nonce": 0,
"code": b"",
"storage": {}
}
}
klass = Chain.configure(name='TestChain',
vm_configuration=((constants.GENESIS_BLOCK_NUMBER,
FrontierVM), ))
chain = klass.from_genesis(ChainDB(get_db_backend()), genesis_params,
genesis_state)
chain.funded_address = funded_addr
chain.funded_address_initial_balance = initial_balance
return chain
def test_blockchain_fixtures(fixture_name, fixture):
genesis_params = {
'parent_hash': fixture['genesisBlockHeader']['parentHash'],
'uncles_hash': fixture['genesisBlockHeader']['uncleHash'],
'coinbase': fixture['genesisBlockHeader']['coinbase'],
'state_root': fixture['genesisBlockHeader']['stateRoot'],
'transaction_root': fixture['genesisBlockHeader']['transactionsTrie'],
'receipt_root': fixture['genesisBlockHeader']['receiptTrie'],
'bloom': fixture['genesisBlockHeader']['bloom'],
'difficulty': fixture['genesisBlockHeader']['difficulty'],
'block_number': fixture['genesisBlockHeader']['number'],
'gas_limit': fixture['genesisBlockHeader']['gasLimit'],
'gas_used': fixture['genesisBlockHeader']['gasUsed'],
'timestamp': fixture['genesisBlockHeader']['timestamp'],
'extra_data': fixture['genesisBlockHeader']['extraData'],
'mix_hash': fixture['genesisBlockHeader']['mixHash'],
'nonce': fixture['genesisBlockHeader']['nonce'],
}
expected_genesis_header = BlockHeader(**genesis_params)
# TODO: find out if this is supposed to pass?
# if 'genesisRLP' in fixture:
# assert rlp.encode(genesis_header) == fixture['genesisRLP']
db = get_db_backend()
chain = MainnetChain
# TODO: It would be great if we can figure out an API for re-configuring
# start block numbers that was more elegant.
if fixture_name.startswith('Homestead'):
chain = Chain.configure('HomesteadChain',
vm_configuration=[(0, HomesteadVM)])
elif fixture_name.startswith('EIP150'):
chain = Chain.configure('EIP150VM', vm_configuration=[(0, EIP150VM)])
elif fixture_name.startswith('TestNetwork'):
homestead_vm = HomesteadVM.configure(dao_fork_block_number=8)
chain = Chain.configure('TestNetworkChain',
vm_configuration=[
(0, FrontierVM),
(5, homestead_vm),
(10, EIP150VM),
])
chain = chain.from_genesis(
db,
genesis_params=genesis_params,
genesis_state=fixture['pre'],
)
genesis_block = chain.get_canonical_block_by_number(0)
genesis_header = genesis_block.header
assert_rlp_equal(genesis_header, expected_genesis_header)
# 1 - mine the genesis block
# 2 - loop over blocks:
# - apply transactions
# - mine block
# 4 - profit!!
for block_data in fixture['blocks']:
should_be_good_block = 'blockHeader' in block_data
if 'rlp_error' in block_data:
assert not should_be_good_block
continue
# The block to import may be in a different block-class-range than the
# chain's current one, so we use the block number specified in the
# fixture to look up the correct block class.
if should_be_good_block:
block_number = block_data['blockHeader']['number']
block_class = chain.get_vm_class_for_block_number(
block_number).get_block_class()
else:
block_class = chain.get_vm().get_block_class()
try:
block = rlp.decode(block_data['rlp'], sedes=block_class, db=db)
except (TypeError, rlp.DecodingError, rlp.DeserializationError) as err:
assert not should_be_good_block, "Block should be good: {0}".format(
err)
continue
try:
mined_block = chain.import_block(block)
except ValidationError as err:
assert not should_be_good_block, "Block should be good: {0}".format(
err)
continue
else:
assert_rlp_equal(mined_block, block)
assert should_be_good_block, "Block should have caused a validation error"
latest_block_hash = chain.get_canonical_block_by_number(
chain.get_block().number - 1).hash
assert latest_block_hash == fixture['lastblockhash']
verify_state_db(fixture['postState'], chain.get_state_db())
from evm import constants
from evm import Chain
from evm.vm.flavors import (
EIP150VM,
FrontierVM,
HomesteadVM,
)
MainnetChain = Chain.configure(
'MainnetChain',
vm_configuration=((0, FrontierVM), (constants.HOMESTEAD_MAINNET_BLOCK,
HomesteadVM),
(constants.EIP150_MAINNET_BLOCK, EIP150VM)))
def test_vm_not_found_if_no_matching_block_number(genesis_header):
chain_class = Chain.configure('ChainStartsAtBlock10', vm_configuration=(
(10, VM_A),
))
with pytest.raises(VMNotFound):
chain_class.get_vm_class_for_block_number(9)
def test_configure_invalid_block_number_in_vm_configuration():
with pytest.raises(ValidationError):
Chain.configure('TestChain', vm_configuration=[(-1, FrontierVM)])
def test_invalid_if_no_vm_configuration():
chain_class = Chain.configure('TestChain', vm_configuration=())
with pytest.raises(ValueError):
chain_class(get_db_backend(), BlockHeader(1, 0, 100))
name='HomesteadVMForTesting',
apply_message=apply_create_message_for_testing,
apply_create_message=apply_create_message_for_testing,
get_ancestor_hash=get_block_hash_for_testing,
)
EIP150VMForTesting = EIP150VM.configure(
name='EIP150VMForTesting',
apply_message=apply_create_message_for_testing,
apply_create_message=apply_create_message_for_testing,
get_ancestor_hash=get_block_hash_for_testing,
)
ChainForTesting = Chain.configure(
name='ChainForTesting',
vm_configuration=(
(constants.GENESIS_BLOCK_NUMBER, FrontierVMForTesting),
(constants.HOMESTEAD_MAINNET_BLOCK, HomesteadVMForTesting),
(constants.EIP150_MAINNET_BLOCK, EIP150VMForTesting),
),
)
@pytest.mark.parametrize(
'fixture_name,fixture',
FIXTURES,
)
def test_vm_fixtures(fixture_name, fixture):
db = get_db_backend()
header = BlockHeader(
coinbase=fixture['env']['currentCoinbase'],
difficulty=fixture['env']['currentDifficulty'],
block_number=fixture['env']['currentNumber'],
def test_configure_invalid_block_number_in_vm_configuration():
with pytest.raises(ValidationError):
Chain.configure('TestChain', vm_configuration=[(-1, FrontierVM)])
def test_invalid_if_no_vm_configuration():
chain_class = Chain.configure('TestChain', vm_configuration=())
with pytest.raises(ValueError):
chain_class(get_db_backend(), BlockHeader(1, 0, 100))