def validate_seal(cls, header: BlockHeader) -> None:
"""
Validate the seal on the given header.
"""
check_pow(
header.block_number, header.mining_hash,
header.mix_hash, header.nonce, header.difficulty)
def check():
header = random.choice(ropsten_epoch_headers)
check_pow(
header.block_number,
header.mining_hash,
header.mix_hash,
header.nonce,
header.difficulty,
)
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_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,
)
async def _handle_new_block(self, sender: SessionAPI,
block: NewBlockPayload) -> None:
header = block.block.header
sender_peer_str = str(
ETHProxyPeer.from_session(sender, self._event_bus,
TO_NETWORKING_BROADCAST_CONFIG))
# Add peer to tracker if we've seen this block before
if header.hash in self._peer_block_tracker:
if sender_peer_str not in self._peer_block_tracker[header.hash]:
self._peer_block_tracker[header.hash].append(sender_peer_str)
else:
# Verify the validity of block, add to tracker and broadcast to eligible peers
try:
check_pow(header.block_number, header.mining_hash,
header.mix_hash, header.nonce, header.difficulty)
except ValidationError:
self.logger.info("Received invalid block from peer: %s",
sender_peer_str)
else:
self._peer_block_tracker[header.hash] = [sender_peer_str]
await self._broadcast_newly_seen_block(header)
def validate_seal(cls, header: BlockHeaderAPI) -> None:
check_pow(header.block_number, header.mining_hash, header.mix_hash,
header.nonce, header.difficulty)
