def test_maybe_spent_txs(self): add_new_block(self.manager, advance_clock=15) blocks = add_blocks_unlock_reward(self.manager) w = self.manager.wallet new_address = w.get_unused_address() out = WalletOutputInfo(decode_address(new_address), 1, timelock=None) tx1 = w.prepare_transaction_compute_inputs(Transaction, outputs=[out]) self.assertEqual(len(tx1.inputs), 1) _input = tx1.inputs[0] key = (_input.tx_id, _input.index) self.assertNotIn(key, w.unspent_txs[settings.HATHOR_TOKEN_UID]) self.assertIn(key, w.maybe_spent_txs[settings.HATHOR_TOKEN_UID]) self.run_to_completion() self.assertIn(key, w.unspent_txs[settings.HATHOR_TOKEN_UID]) self.assertEqual(0, len(w.maybe_spent_txs[settings.HATHOR_TOKEN_UID])) # when we receive the new tx it will remove from maybe_spent tx2 = w.prepare_transaction_compute_inputs(Transaction, outputs=[out]) tx2.storage = self.manager.tx_storage tx2.timestamp = max( tx2.get_spent_tx(txin).timestamp for txin in tx2.inputs) + 1 tx2.parents = self.manager.get_new_tx_parents(tx2.timestamp) tx2.weight = 1 tx2.timestamp = blocks[-1].timestamp + 1 tx2.resolve() self.assertTrue(self.manager.on_new_tx(tx2, fails_silently=False)) self.clock.advance(2) self.assertEqual(0, len(w.maybe_spent_txs[settings.HATHOR_TOKEN_UID]))
def test_dont_revert_block_high_weight_transaction_verify_other(self): """ A conflict transaction will be propagated and voided. But this transaction verifies its conflicting transaction. So, its accumulated weight will always be smaller than the others and it will never be executed. """ self.assertEqual(len(self.genesis_blocks), 1) manager = self.create_peer('testnet', tx_storage=self.tx_storage) # Mine a few blocks in a row with no transaction but the genesis blocks = add_new_blocks(manager, 3, advance_clock=15) add_blocks_unlock_reward(manager) # Add some transactions between blocks add_new_transactions(manager, 5, advance_clock=15) # Create a double spending transaction. conflicting_tx = add_new_double_spending(manager) meta = conflicting_tx.get_metadata() self.assertEqual(len(meta.conflict_with), 1) self.assertIn(list(meta.conflict_with)[0], conflicting_tx.parents) # Add a few transactions. add_new_transactions(manager, 10, advance_clock=15) meta = conflicting_tx.get_metadata() self.assertEqual(meta.voided_by, {conflicting_tx.hash}) # These blocks will be voided later. blocks2 = add_new_blocks(manager, 2, advance_clock=15) # This block verifies the conflicting transaction and has a high weight. b0 = manager.generate_mining_block() b0.parents = [ blocks[-1].hash, conflicting_tx.hash, conflicting_tx.parents[0] ] # b0.parents = [b0.parents[0], conflicting_tx.hash, conflicting_tx.parents[0]] b0.weight = 10 b0.resolve() b0.verify() manager.propagate_tx(b0, fails_silently=False) b1 = add_new_block(manager, advance_clock=15) b2 = add_new_block(manager, advance_clock=15) # dot = GraphvizVisualizer(manager.tx_storage, include_verifications=True, include_funds=True).dot() # dot.render('dot2') self.assertNotEqual(b1.parents[0], b0.hash) self.assertEqual(b2.parents[0], b1.hash) meta = conflicting_tx.get_metadata() self.assertEqual(meta.voided_by, {conflicting_tx.hash}) for block in blocks2: meta = block.get_metadata() self.assertIsNone(meta.voided_by) self.assertConsensusValid(manager)
def test_choose_tips(self): genesis = self.manager.tx_storage.get_all_genesis() genesis_txs_hashes = [tx.hash for tx in genesis if not tx.is_block] b = add_new_block(self.manager, advance_clock=1) # The txs parents are the genesis self.assertCountEqual(set(b.parents[1:]), set(genesis_txs_hashes)) reward_blocks = add_blocks_unlock_reward(self.manager) # No tips self.assertEqual( len(self.manager.tx_storage.indexes.mempool_tips.get()), 0) tx1 = add_new_transactions(self.manager, 1, advance_clock=1)[0] # The tx parents will be the genesis txs still self.assertCountEqual(set(tx1.parents), set(genesis_txs_hashes)) # The new tx will be a tip self.assertCountEqual( self.manager.tx_storage.indexes.mempool_tips.get(), set([tx1.hash])) tx2 = add_new_transactions(self.manager, 1, advance_clock=1)[0] # The tx2 parents will be the tx1 and one of the genesis self.assertTrue(tx1.hash in tx2.parents) # The other parent will be one of tx1 parents self.assertTrue( set(tx2.parents).issubset(set([tx1.hash] + tx1.parents))) self.assertCountEqual( self.manager.tx_storage.indexes.mempool_tips.get(), set([tx2.hash])) tx3 = add_new_transactions(self.manager, 1, advance_clock=1)[0] # tx3 parents will be tx2 and one of tx2 parents self.assertTrue(tx2.hash in tx3.parents) self.assertTrue( set(tx3.parents).issubset(set([tx2.hash] + tx2.parents))) self.assertCountEqual( self.manager.tx_storage.indexes.mempool_tips.get(), set([tx3.hash])) b2 = add_new_block(self.manager, advance_clock=1) # With new block there are no tips and block parents # will be tx3 and one of tx3 parents self.assertEqual( len(self.manager.tx_storage.indexes.mempool_tips.get()), 0) self.assertTrue(tx3.hash in b2.parents) self.assertTrue(reward_blocks[-1].hash in b2.parents) self.assertTrue( set(b2.parents).issubset( set([tx3.hash] + [reward_blocks[-1].hash] + tx3.parents))) tx4 = add_new_transactions(self.manager, 1, advance_clock=1)[0] # tx4 had no tip, so the parents will be the last block parents self.assertCountEqual(set(tx4.parents), set(b2.parents[1:])) # Then tx4 will become a tip self.assertCountEqual( self.manager.tx_storage.indexes.mempool_tips.get(), set([tx4.hash]))
def test_dont_revert_block_low_weight(self): """ A conflict transaction will be propagated and voided. A new block with low weight will verify it, which won't be enough to flip to executed. So, it will remain voided. """ self.assertEqual(len(self.genesis_blocks), 1) manager = self.create_peer('testnet', tx_storage=self.tx_storage) # Mine a few blocks in a row with no transaction but the genesis blocks = add_new_blocks(manager, 3, advance_clock=15) add_blocks_unlock_reward(manager) # Add some transactions between blocks add_new_transactions(manager, 5, advance_clock=15) # Create a double spending transaction. conflicting_tx = add_new_double_spending(manager, use_same_parents=True) # Add a few transactions. add_new_transactions(manager, 10, advance_clock=15) meta = conflicting_tx.get_metadata() self.assertEqual(meta.voided_by, {conflicting_tx.hash}) for parent_hash in conflicting_tx.parents: self.assertNotIn(parent_hash, meta.conflict_with) # These blocks will be voided later. add_new_blocks(manager, 2, advance_clock=15) # This block verifies the conflicting transaction and has a low weight. # So, it is not enough to revert and this block will be voided as well. b0 = manager.generate_mining_block() b0.parents = [ blocks[-1].hash, conflicting_tx.hash, conflicting_tx.parents[0] ] b0.resolve() b0.verify() manager.propagate_tx(b0, fails_silently=False) b1 = add_new_block(manager, advance_clock=15) b2 = add_new_block(manager, advance_clock=15) # dot = GraphvizVisualizer(manager.tx_storage, include_verifications=True, include_funds=True).dot() # dot.render('dot1') self.assertNotEqual(b1.parents[0], b0.hash) self.assertEqual(b2.parents[0], b1.hash) meta = conflicting_tx.get_metadata() self.assertEqual(meta.voided_by, {conflicting_tx.hash}) b0_meta = b0.get_metadata() self.assertEqual(b0_meta.voided_by, {b0.hash, conflicting_tx.hash}) self.assertConsensusValid(manager)
def test_dont_revert_block_high_weight_verify_both(self): """ A conflicting transaction will be propagated and voided. But the block with high weight verifies both the conflicting transactions, so this block will always be voided. """ self.assertEqual(len(self.genesis_blocks), 1) manager = self.create_peer('testnet', tx_storage=self.tx_storage) # Mine a few blocks in a row with no transaction but the genesis add_new_blocks(manager, 3, advance_clock=15) add_blocks_unlock_reward(manager) # Add some transactions between blocks add_new_transactions(manager, 5, advance_clock=15) # Create a double spending transaction. conflicting_tx = add_new_double_spending(manager, use_same_parents=True) # Add a few transactions. add_new_transactions(manager, 10, advance_clock=15) meta = conflicting_tx.get_metadata() self.assertEqual(meta.voided_by, {conflicting_tx.hash}) for parent_hash in conflicting_tx.parents: self.assertNotIn(parent_hash, meta.conflict_with) # Add two blocks. blocks2 = add_new_blocks(manager, 2, advance_clock=15) # This block verifies the conflicting transaction and has a high weight. b0 = manager.generate_mining_block() b0.parents = [ b0.parents[0], conflicting_tx.hash, conflicting_tx.parents[0] ] b0.weight = 10 b0.resolve() b0.verify() manager.propagate_tx(b0, fails_silently=False) b1 = add_new_block(manager, advance_clock=15) b2 = add_new_block(manager, advance_clock=15) # dot = GraphvizVisualizer(manager.tx_storage, include_verifications=True, include_funds=True).dot() # dot.render('dot3') self.assertNotEqual(b1.parents[0], b0.hash) self.assertEqual(b2.parents[0], b1.hash) meta = conflicting_tx.get_metadata() self.assertEqual(meta.voided_by, {conflicting_tx.hash}) for block in blocks2: meta = block.get_metadata() self.assertIsNone(meta.voided_by) self.assertConsensusValid(manager)
def test_tips_winner(self): add_new_block(self.manager, advance_clock=1) add_blocks_unlock_reward(self.manager) self.assertEqual( len(self.manager.tx_storage.indexes.mempool_tips.get()), 0) tx1 = add_new_transactions(self.manager, 1, advance_clock=1)[0] # tx1 will be the tip self.assertCountEqual( self.manager.tx_storage.indexes.mempool_tips.get(), set([tx1.hash])) tx2 = add_new_transactions(self.manager, 1, advance_clock=1)[0] # tx2 will be the tip now self.assertCountEqual( self.manager.tx_storage.indexes.mempool_tips.get(), set([tx2.hash])) tx3 = Transaction.create_from_struct(tx2.get_struct()) tx3.parents = [tx2.parents[1], tx2.parents[0]] tx3.resolve() # Propagate a conflicting twin transaction with tx2 self.manager.propagate_tx(tx3) meta1 = tx2.get_metadata(force_reload=True) self.assertEqual(meta1.conflict_with, [tx3.hash]) self.assertEqual(meta1.voided_by, {tx2.hash}) self.assertEqual(meta1.twins, [tx3.hash]) self.assertCountEqual( self.manager.tx_storage.indexes.mempool_tips.get(), set([tx1.hash])) self.manager.reactor.advance(10) # Creating a new block that confirms tx3, then is will become valid and voiding tx2 new_block = add_new_block(self.manager, propagate=False) new_block.parents = [new_block.parents[0], tx1.hash, tx3.hash] new_block.resolve() new_block.verify() self.manager.propagate_tx(new_block, fails_silently=False) self.manager.reactor.advance(10) self.assertIsNone( self.manager.tx_storage.get_metadata(tx3.hash).voided_by) self.assertIsNotNone( self.manager.tx_storage.get_metadata(tx2.hash).voided_by) # The block confirms tx3, so it's not a tip self.assertCountEqual( self.manager.tx_storage.indexes.mempool_tips.get(), set())
def setUp(self): super().setUp() self.tx_storage = ModifiedTransactionMemoryStorage() self.network = 'testnet' self.manager = self.create_peer(self.network, tx_storage=self.tx_storage) self.all_hashes = set() for tx in self.manager.tx_storage.get_all_transactions(): self.all_hashes.add(tx.hash) # generate blocks and transactions where blk1 is spent by tx1 self.blk1 = add_new_block(self.manager, advance_clock=15) self.block_list = add_blocks_unlock_reward(self.manager) self.tx_list = add_new_transactions(self.manager, 5, advance_clock=15) self.tx1 = self.tx_list[0] self.assertTrue(self.tx1.inputs[0].tx_id == self.blk1.hash) self.block_list2 = add_new_blocks(self.manager, 8, advance_clock=15) # collect all hashes self.all_hashes.add(self.blk1.hash) self.all_hashes.update(x.hash for x in self.block_list) self.all_hashes.update(x.hash for x in self.tx_list) self.all_hashes.update(x.hash for x in self.block_list2)
def test_create_token_transaction(self): add_new_block(self.manager, advance_clock=5) add_blocks_unlock_reward(self.manager) tx = create_tokens(self.manager) tokens_created = tx.outputs[0].value token_uid = tx.tokens[0] address_b58 = self.manager.wallet.get_unused_address() address = decode_address(address_b58) _, hathor_balance = self.manager.wallet.balance[ settings.HATHOR_TOKEN_UID] # prepare tx with hathors and another token # hathor tx hathor_out = WalletOutputInfo(address, hathor_balance, None) # token tx token_out = WalletOutputInfo(address, tokens_created - 20, None, token_uid.hex()) tx2 = self.manager.wallet.prepare_transaction_compute_inputs( Transaction, [hathor_out, token_out]) tx2.storage = self.manager.tx_storage tx2.timestamp = tx.timestamp + 1 tx2.parents = self.manager.get_new_tx_parents() tx2.resolve() tx2.verify() self.assertNotEqual(len(tx2.inputs), 0) token_dict = defaultdict(int) for _input in tx2.inputs: output_tx = self.manager.tx_storage.get_transaction(_input.tx_id) output = output_tx.outputs[_input.index] token_uid = output_tx.get_token_uid(output.get_token_index()) token_dict[token_uid] += output.value # make sure balance is the same and we've checked both balances did_enter = 0 for token_uid, value in token_dict.items(): if token_uid == settings.HATHOR_TOKEN_UID: self.assertEqual(value, hathor_balance) did_enter += 1 elif token_uid == token_uid: self.assertEqual(value, tokens_created) did_enter += 1 self.assertEqual(did_enter, 2)
def test_prepare_transaction(self): block = add_new_block(self.manager, advance_clock=5) w = self.manager.wallet new_address = w.get_unused_address() out = WalletOutputInfo(decode_address(new_address), 1, timelock=None) with self.assertRaises(InsufficientFunds): w.prepare_transaction_compute_inputs(Transaction, outputs=[out], timestamp=block.timestamp)
def test_tips_back(self): add_new_block(self.manager, advance_clock=1) add_blocks_unlock_reward(self.manager) self.assertEqual( len(self.manager.tx_storage.indexes.mempool_tips.get()), 0) tx = add_new_transactions(self.manager, 1, advance_clock=1)[0] # tx will be the tip self.assertCountEqual( self.manager.tx_storage.indexes.mempool_tips.get(), set([tx.hash])) tx2 = add_new_transactions(self.manager, 1, advance_clock=1)[0] # tx2 will be the tip now self.assertCountEqual( self.manager.tx_storage.indexes.mempool_tips.get(), set([tx2.hash])) # with a double spending tx2 must continue being the tip add_new_double_spending(self.manager) self.assertCountEqual( self.manager.tx_storage.indexes.mempool_tips.get(), set([tx2.hash]))
def test_separate_inputs(self): block = add_new_block(self.manager, advance_clock=5) my_input = TxInput(block.hash, 0, b'') genesis_blocks = [ tx for tx in get_genesis_transactions(None) if tx.is_block ] genesis_block = genesis_blocks[0] other_input = TxInput(genesis_block.hash, 0, b'') my_inputs, other_inputs = self.manager.wallet.separate_inputs( [my_input, other_input], self.manager.tx_storage) self.assertEqual(len(my_inputs), 1) self.assertEqual(my_inputs[0], my_input) self.assertEqual(len(other_inputs), 1) self.assertEqual(other_inputs[0], other_input)
def test_init_not_voided_tips(self): # add a bunch of blocks and transactions for i in range(30): add_new_block(self.manager, advance_clock=15) add_new_transactions(self.manager, 5, advance_clock=15) # add a bunch of conflicting transactions, these will all become voided for i in range(50): add_new_double_spending(self.manager) # finish up with another bunch of blocks and transactions for i in range(30): add_new_block(self.manager, advance_clock=15) add_new_transactions(self.manager, 5, advance_clock=15) # not the point of this test, but just a sanity check self.assertConsensusValid(self.manager) # make sure we have the right number of voided transactions self.assertEqual( 50, sum( bool(tx.get_metadata().voided_by) for tx in self.tx_storage.get_all_transactions())) # create a new manager (which will initialize in the self.create_peer call) self.tx_storage._reset_cache() self.manager.stop() manager = self.create_peer(self.network, tx_storage=self.tx_storage, full_verification=False) # make sure none of its tx tips are voided all_tips = manager.generate_parent_txs(None).get_all_tips() iter_tips_meta = map(manager.tx_storage.get_metadata, all_tips) self.assertFalse(any(tx_meta.voided_by for tx_meta in iter_tips_meta))
def test_transaction_and_balance(self): # generate a new block and check if we increase balance new_address = self.wallet.get_unused_address() out = WalletOutputInfo(decode_address(new_address), self.TOKENS, timelock=None) block = add_new_block(self.manager) block.verify() utxo = self.wallet.unspent_txs[settings.HATHOR_TOKEN_UID].get((block.hash, 0)) self.assertIsNotNone(utxo) self.assertEqual(self.wallet.balance[settings.HATHOR_TOKEN_UID], WalletBalance(0, self.BLOCK_TOKENS)) # create transaction spending this value, but sending to same wallet new_address2 = self.wallet.get_unused_address() out = WalletOutputInfo(decode_address(new_address2), self.TOKENS, timelock=None) tx1 = self.wallet.prepare_transaction_compute_inputs(Transaction, outputs=[out]) tx1.update_hash() tx1.verify_script(tx1.inputs[0], block) tx1.storage = self.tx_storage self.wallet.on_new_tx(tx1) self.tx_storage.save_transaction(tx1) self.assertEqual(len(self.wallet.spent_txs), 1) utxo = self.wallet.unspent_txs[settings.HATHOR_TOKEN_UID].get((tx1.hash, 0)) self.assertIsNotNone(utxo) self.assertEqual(self.wallet.balance[settings.HATHOR_TOKEN_UID], WalletBalance(0, self.TOKENS)) # pass inputs and outputs to prepare_transaction, but not the input keys # spend output last transaction input_info = WalletInputInfo(tx1.hash, 0, None) new_address3 = self.wallet.get_unused_address() out = WalletOutputInfo(decode_address(new_address3), self.TOKENS, timelock=None) tx2 = self.wallet.prepare_transaction_incomplete_inputs(Transaction, inputs=[input_info], outputs=[out], tx_storage=self.tx_storage) tx2.storage = self.tx_storage tx2.update_hash() tx2.storage = self.tx_storage tx2.verify_script(tx2.inputs[0], tx1) self.tx_storage.save_transaction(tx2) self.wallet.on_new_tx(tx2) self.assertEqual(len(self.wallet.spent_txs), 2) self.assertEqual(self.wallet.balance[settings.HATHOR_TOKEN_UID], WalletBalance(0, self.TOKENS)) # Test getting more unused addresses than the gap limit for i in range(3): kwargs = {'mark_as_used': True} if i == 2: # Last one we dont mark as used kwargs['mark_as_used'] = False self.wallet.get_unused_address(**kwargs)
def test_checkpoint_validation(self): from hathor.transaction.transaction_metadata import ValidationState # manually validate with sync_checkpoints=True block1 = add_new_block(self.manager, propagate=False) block1.validate_full(sync_checkpoints=True) self.assertTrue(block1.get_metadata().validation.is_checkpoint()) self.manager.propagate_tx(block1) del block1 # use on_new_tx with sync_checkpoints=True block2 = self.manager.generate_mining_block() block2.resolve() self.assertTrue( self.manager.on_new_tx(block2, sync_checkpoints=True, partial=True, fails_silently=False)) self.assertEqual(block2.get_metadata().validation, ValidationState.CHECKPOINT_FULL)
def test_double_spending_attempt_1(self): manager = self.manager1 add_new_blocks(manager, 5, advance_clock=15) add_blocks_unlock_reward(manager) from hathor.crypto.util import decode_address from hathor.graphviz import GraphvizVisualizer from hathor.transaction import Transaction from hathor.wallet.base_wallet import WalletInputInfo, WalletOutputInfo graphviz = GraphvizVisualizer(manager.tx_storage, include_verifications=True, include_funds=True) addr = manager.wallet.get_unused_address() outputs = [] outputs.append(WalletOutputInfo(decode_address(addr), 1, None)) outputs.append(WalletOutputInfo(decode_address(addr), 1000, None)) outputs.append( WalletOutputInfo(decode_address(addr), 6400 - 1001, None)) tx_fund0 = manager.wallet.prepare_transaction_compute_inputs( Transaction, outputs, manager.tx_storage) tx_fund0.weight = 1 tx_fund0.parents = manager.get_new_tx_parents() tx_fund0.timestamp = int(self.clock.seconds()) tx_fund0.resolve() self.assertTrue(manager.propagate_tx(tx_fund0)) def do_step(tx_fund): inputs = [ WalletInputInfo(tx_fund.hash, 0, manager.wallet.get_private_key(addr)) ] outputs = [WalletOutputInfo(decode_address(addr), 1, None)] tx1 = manager.wallet.prepare_transaction(Transaction, inputs, outputs, tx_fund.timestamp + 1) tx1.weight = 1 tx1.parents = manager.get_new_tx_parents(tx1.timestamp) tx1.resolve() self.assertTrue(manager.propagate_tx(tx1)) inputs = [] inputs.append( WalletInputInfo(tx1.hash, 0, manager.wallet.get_private_key(addr))) inputs.append( WalletInputInfo(tx_fund.hash, 1, manager.wallet.get_private_key(addr))) outputs = [ WalletOutputInfo(decode_address(addr), tx_fund.outputs[1].value + 1, None) ] tx2 = manager.wallet.prepare_transaction(Transaction, inputs, outputs, tx1.timestamp + 1) tx2.weight = 1 tx2.parents = manager.get_new_tx_parents(tx2.timestamp) tx2.resolve() self.assertTrue(manager.propagate_tx(tx2)) inputs = [ WalletInputInfo(tx_fund.hash, 0, manager.wallet.get_private_key(addr)) ] outputs = [WalletOutputInfo(decode_address(addr), 1, None)] tx3 = manager.wallet.prepare_transaction(Transaction, inputs, outputs, tx_fund.timestamp + 1) tx3.weight = tx1.weight + tx2.weight + 0.1 tx3.parents = manager.get_new_tx_parents(tx3.timestamp) tx3.resolve() self.assertTrue(manager.propagate_tx(tx3)) inputs = [ WalletInputInfo(tx_fund.hash, 1, manager.wallet.get_private_key(addr)) ] outputs = [ WalletOutputInfo(decode_address(addr), tx_fund.outputs[1].value, None) ] tx4 = manager.wallet.prepare_transaction(Transaction, inputs, outputs, tx_fund.timestamp + 1) tx4.weight = 1 tx4.parents = manager.get_new_tx_parents(tx4.timestamp) tx4.resolve() self.assertTrue(manager.propagate_tx(tx4)) inputs = [] inputs.append( WalletInputInfo(tx2.hash, 0, manager.wallet.get_private_key(addr))) inputs.append( WalletInputInfo(tx4.hash, 0, manager.wallet.get_private_key(addr))) outputs = [] outputs.append(WalletOutputInfo(decode_address(addr), 1, None)) outputs.append( WalletOutputInfo(decode_address(addr), 2 * tx_fund.outputs[1].value, None)) tx5 = manager.wallet.prepare_transaction(Transaction, inputs, outputs, tx2.timestamp + 1) tx5.weight = tx3.weight - tx1.weight + 0.1 tx5.parents = [tx2.hash, tx4.hash] tx5.resolve() self.assertTrue(manager.propagate_tx(tx5)) return tx5 tx = tx_fund0 N = 10 for _ in range(N): tx = do_step(tx) block = add_new_block(manager) self.assertIn(tx.hash, block.parents) dot = graphviz.dot() dot.render('dot0') meta = tx.get_metadata() self.assertIsNone(meta.conflict_with) self.assertIsNone(meta.voided_by) self.assertEqual(tx.outputs[1].value, 1000 * 2**N) self.assertConsensusValid(manager)
def test_split_brain(self): debug_pdf = False manager1 = self.create_peer(self.network, unlock_wallet=True) manager1.avg_time_between_blocks = 3 manager2 = self.create_peer(self.network, unlock_wallet=True) manager2.avg_time_between_blocks = 3 for _ in range(10): add_new_block(manager1, advance_clock=1) add_blocks_unlock_reward(manager1) add_new_block(manager2, advance_clock=1) add_blocks_unlock_reward(manager2) self.clock.advance(10) for _ in range(random.randint(3, 10)): add_new_transactions(manager1, random.randint(2, 4)) add_new_transactions(manager2, random.randint(3, 7)) add_new_double_spending(manager1) add_new_double_spending(manager2) self.clock.advance(10) self.clock.advance(20) self.assertTipsNotEqual(manager1, manager2) self.assertConsensusValid(manager1) self.assertConsensusValid(manager2) if debug_pdf: dot1 = GraphvizVisualizer(manager1.tx_storage, include_verifications=True).dot() dot1.render('dot1-pre') conn = FakeConnection(manager1, manager2) conn.run_one_step() # HELLO conn.run_one_step() # PEER-ID empty_counter = 0 for i in range(1000): if conn.is_empty(): empty_counter += 1 if empty_counter > 10: break else: empty_counter = 0 conn.run_one_step() self.clock.advance(0.2) if debug_pdf: dot1 = GraphvizVisualizer(manager1.tx_storage, include_verifications=True).dot() dot1.render('dot1-post') dot2 = GraphvizVisualizer(manager2.tx_storage, include_verifications=True).dot() dot2.render('dot2-post') node_sync = conn.proto1.state.get_sync_plugin() self.assertEqual(node_sync.synced_timestamp, node_sync.peer_timestamp) self.assertTipsEqual(manager1, manager2) self.assertConsensusEqual(manager1, manager2) # self.assertConsensusValid(manager1) self.assertConsensusValid(manager2)
def test_revert_block_high_weight(self): """ A conflict transaction will be propagated. At first, it will be voided. But, a new block with high weight will verify it, which will flip it to executed. """ self.assertEqual(len(self.genesis_blocks), 1) manager = self.create_peer('testnet', tx_storage=self.tx_storage) # Mine a few blocks in a row with no transaction but the genesis blocks = add_new_blocks(manager, 3, advance_clock=15) add_blocks_unlock_reward(manager) # Add some transactions between blocks add_new_transactions(manager, 5, advance_clock=15) # Create a double spending transaction. conflicting_tx = add_new_double_spending(manager, use_same_parents=True) # Add a few transactions. add_new_transactions(manager, 10, advance_clock=15) meta = conflicting_tx.get_metadata() self.assertEqual(meta.voided_by, {conflicting_tx.hash}) for parent_hash in conflicting_tx.parents: self.assertNotIn(parent_hash, meta.conflict_with) # These blocks will be voided later. blocks2 = add_new_blocks(manager, 2, advance_clock=15) # This block verifies the conflicting transaction and has a high weight. # So, it will be executed and previous blocks and transactions will be voided. tb0 = manager.make_custom_block_template(blocks[-1].hash, [conflicting_tx.hash, conflicting_tx.parents[0]]) b0 = tb0.generate_mining_block(storage=manager.tx_storage) b0.weight = 10 b0.resolve() b0.verify() manager.propagate_tx(b0, fails_silently=False) b1 = add_new_block(manager, advance_clock=15) b2 = add_new_block(manager, advance_clock=15) # from hathor.graphviz import GraphvizVisualizer # dot = GraphvizVisualizer(manager.tx_storage, include_verifications=True, include_funds=True).dot() # dot.render('dot0') self.assertEqual(b1.parents[0], b0.hash) self.assertEqual(b2.parents[0], b1.hash) meta = conflicting_tx.get_metadata() self.assertIsNone(meta.voided_by) # Find the other transaction voiding the blocks. tmp_tx = manager.tx_storage.get_transaction(blocks2[0].parents[1]) tmp_tx_meta = tmp_tx.get_metadata() self.assertEqual(len(tmp_tx_meta.voided_by), 1) other_tx_hash = list(tmp_tx_meta.voided_by)[0] for block in blocks2: meta = block.get_metadata() self.assertEqual(meta.voided_by, {other_tx_hash, block.hash}) self.assertConsensusValid(manager)