def test_chain_builder_initialize_chain_with_params(chain_class):
chain = pipe(chain_class, genesis(params={'difficulty': 12345}, ))
header = chain.get_canonical_head()
assert header == chain.get_canonical_block_by_number(0).header
assert header.difficulty == 12345
def test_chain_builder_initialize_chain_default(chain_class):
chain = pipe(
chain_class,
genesis(),
)
header = chain.get_canonical_head()
assert header == chain.get_canonical_block_by_number(0).header
assert header.parent_hash == constants.GENESIS_PARENT_HASH
assert header.uncles_hash == constants.EMPTY_UNCLE_HASH
assert header.coinbase == constants.GENESIS_COINBASE
assert header.state_root == constants.BLANK_ROOT_HASH
assert header.transaction_root == constants.BLANK_ROOT_HASH
assert header.receipt_root == constants.BLANK_ROOT_HASH
assert header.bloom == 0
assert header.difficulty == 1
assert header.block_number == constants.GENESIS_BLOCK_NUMBER
assert header.gas_limit == constants.GENESIS_GAS_LIMIT
assert header.gas_used == 0
# account for runtime. should run in less than few seconds and should be
# effectively "now"
assert abs(header.timestamp - time.time()) < 2
assert header.extra_data == constants.GENESIS_EXTRA_DATA
assert header.mix_hash == constants.GENESIS_MIX_HASH
assert header.nonce == constants.GENESIS_NONCE
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 test_chain_builder_initialize_chain_with_state_simple(chain_class):
chain = pipe(chain_class, genesis(state=((ADDRESS_A, 'balance', 1), ), ))
header = chain.get_canonical_head()
assert header == chain.get_canonical_block_by_number(0).header
assert header.state_root != constants.BLANK_ROOT_HASH
account_db = chain.get_vm().state.account_db
assert account_db.get_balance(ADDRESS_A) == 1
def test_rewards(vm_fn, miner_1_balance, miner_2_balance):
OTHER_MINER_ADDRESS = 20 * b'\x01'
TOTAL_BLOCKS_CANONICAL_CHAIN = 3
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
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
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 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()
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_initialize_chain_with_params_and_state(chain_class):
chain = pipe(
chain_class,
genesis(
params={'difficulty': 12345},
state=((ADDRESS_A, 'balance', 1), ),
))
header = chain.get_canonical_head()
assert header == chain.get_canonical_block_by_number(0).header
assert header.difficulty == 12345
assert header.state_root != constants.BLANK_ROOT_HASH
account_db = chain.get_vm().state.account_db
assert account_db.get_balance(ADDRESS_A) == 1
def test_mining_tools_proof_of_work_mining(base_vm_class):
vm_class = type(base_vm_class.__name__, (POWMiningMixin, base_vm_class),
{})
class ChainClass(MiningChain):
vm_configuration = ((0, vm_class), )
chain = genesis(ChainClass)
block = chain.mine_block()
check_pow(
block.number,
block.header.mining_hash,
block.header.mix_hash,
block.header.nonce,
block.header.difficulty,
)
chain_split,
copy,
disable_pow_check,
frontier_at,
genesis,
import_block,
import_blocks,
mine_block,
mine_blocks,
)
MINING_CHAIN_PARAMS = (
MiningChain,
frontier_at(0),
disable_pow_check,
genesis(),
)
@pytest.fixture
def mining_chain():
return build(*MINING_CHAIN_PARAMS)
REGULAR_CHAIN_PARAMS = (
Chain,
frontier_at(0),
genesis(),
)