async def resetToGenesisFixture(self, chain_info: Any) -> BaseChain:
'''
This method is a special case. It returns a new chain object
which is then replaced inside :class:`~trinity.rpc.main.RPCServer`
for all future calls.
'''
return new_chain_from_fixture(chain_info, type(self._chain))
def test_blockchain_fixtures(fixture_data, fixture):
try:
chain = new_chain_from_fixture(fixture)
except ValueError as e:
raise AssertionError("could not load chain for {}".format(
(fixture_data, ))) from e
genesis_params = genesis_params_from_fixture(fixture)
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']
genesis_block = chain.get_canonical_block_by_number(0)
genesis_header = genesis_block.header
assert_imported_genesis_header_unchanged(expected_genesis_header,
genesis_header)
# 1 - mine the genesis block
# 2 - loop over blocks:
# - apply transactions
# - mine block
# 3 - diff resulting state with expected state
# 4 - check that all previous blocks were valid
for block_fixture in fixture['blocks']:
should_be_good_block = 'blockHeader' in block_fixture
if 'rlp_error' in block_fixture:
assert not should_be_good_block
continue
if should_be_good_block:
(block, mined_block, block_rlp) = apply_fixture_block_to_chain(
block_fixture,
chain,
perform_validation=False # we manually validate below
)
assert_mined_block_unchanged(block, mined_block)
chain.validate_block(block)
else:
try:
apply_fixture_block_to_chain(block_fixture, chain)
except (TypeError, rlp.DecodingError, rlp.DeserializationError,
ValidationError) as err:
# failure is expected on this bad block
pass
else:
raise AssertionError(
"Block should have caused a validation error")
latest_block_hash = chain.get_canonical_block_by_number(
chain.get_block().number - 1).hash
if latest_block_hash != fixture['lastblockhash']:
verify_account_db(fixture['postState'],
chain.get_vm().state.account_db)
async def resetToGenesisFixture(self, chain_info: Any) -> ChainAPI:
"""
This method is a special case. It returns a new chain object
which is then replaced inside :class:`~trinity.rpc.main.RPCServer`
for all future calls.
"""
chain = new_chain_from_fixture(chain_info, type(self.chain))
await self.event_bus.broadcast(ChainReplacementEvent(chain),
BroadcastConfig(internal=True))
return chain
def test_blockchain_fixtures(fixture_data, fixture):
try:
chain = new_chain_from_fixture(fixture)
except ValueError as e:
raise AssertionError(f"could not load chain for {fixture_data}") from e
genesis_fields = genesis_fields_from_fixture(fixture)
genesis_block = chain.get_canonical_block_by_number(0)
genesis_header = genesis_block.header
# Validate the genesis header RLP against the generated header
if 'genesisRLP' in fixture:
# Super hacky, but better than nothing: extract the header, then re-decode it
fixture_decoded_block = rlp.decode(fixture['genesisRLP'])
fixture_encoded_header = rlp.encode(fixture_decoded_block[0])
fixture_header = rlp.decode(fixture_encoded_header, sedes=HeaderSedes)
# Error message with pretty output if header doesn't match
assert_headers_eq(fixture_header, genesis_header)
# Last gut check that transactions & receipts are valid, too
assert rlp.encode(genesis_block) == fixture['genesisRLP']
assert_imported_genesis_header_unchanged(genesis_fields, genesis_header)
# 1 - mine the genesis block
# 2 - loop over blocks:
# - apply transactions
# - mine block
# 3 - diff resulting state with expected state
# 4 - check that all previous blocks were valid
for block_fixture in fixture['blocks']:
should_be_good_block = 'expectException' not in block_fixture
if 'rlp_error' in block_fixture:
assert not should_be_good_block
continue
if should_be_good_block:
(original_block, executed_block,
block_rlp) = apply_fixture_block_to_chain(
block_fixture,
chain,
perform_validation=False # we manually validate below
)
assert_mined_block_unchanged(original_block, executed_block)
chain.validate_block(original_block)
else:
try:
apply_fixture_block_to_chain(block_fixture, chain)
except EXPECTED_BAD_BLOCK_EXCEPTIONS:
# failure is expected on this bad block
pass
else:
raise AssertionError(
"Block should have caused a validation error")
latest_block_hash = chain.get_canonical_block_by_number(
chain.get_block().number - 1).hash
if latest_block_hash != fixture['lastblockhash']:
verify_state(fixture['postState'], chain.get_vm().state)
