def mine_forever():
while True:
my_address = init_wallet()[2]
block = assemble_and_solve_block(my_address)
if block:
connect_block(block)
save_to_disk()
def handle(self):
data = read_all_from_socket(self.request)
peer_hostname = self.request.getpeername()[0]
peer_hostnames.add(peer_hostname)
if hasattr(data, 'handle') and isinstance(data.handle, Callable):
data.handle(self.request, peer_hostname)
elif isinstance(data, Transaction):
logger.info(f'received txn {data.id} for peer {peer_hostname}')
mempool.add_txn_to_mempool(data)
elif isinstance(data, block.Block):
logger.info(f'received block {data.id} from peer {peer_hostname}')
connect_block(data)
def test_dependent_txns_in_single_block(): set_active_chain([]) mempool.clear() assert connect_block(chain1[0]) == ACTIVE_CHAIN_IDX assert connect_block(chain1[1]) == ACTIVE_CHAIN_IDX assert len(get_active_chain()) == 2 assert len(utxo_set) == 2 utxo1 = utxo_set[list(utxo_set.keys())[0]] txout1 = TxOut(value=901, pubkey=utxo1.pubkey) txin1 = make_txin(signing_key, utxo1.outpoint, txout1) txn1 = Transaction(txins=[txin1], txouts=[txout1], locktime=0) # Create a transaction that is depend on the yet-unconfirmed transaction above txout2 = TxOut(value=9001, pubkey=txout1.pubkey) txin2 = make_txin(signing_key, OutPoint(txn1.id, 0), txout2) txn2 = Transaction(txins=[txin2], txouts=[txout2], locktime=0) # assert that we don't accept this txn -- too early to spend the coinbase with pytest.raises(TxnValidationError) as excinfo: validate_txn(txn2) assert 'Spend value is more than available' in str(excinfo) connect_block(chain1[2]) add_txn_to_mempool(txn1) assert txn1.id in mempool # In txn2, we're attemping to spend more than is available (9001 vs. 901). assert not add_txn_to_mempool(txn2) with pytest.raises(TxnValidationError) as excinfo: validate_txn(txn2) assert 'Spend value is more than available' in str(excinfo.value) # Recreate the transaction with an acceptable value txout2 = TxOut(value=901, pubkey=txout1.pubkey) txin2 = make_txin(signing_key, OutPoint(txn1.id, 0), txout2) txn2 = Transaction(txins=[txin2], txouts=[txout2], locktime=0) add_txn_to_mempool(txn2) assert txn2.id in mempool
def handle(self, sock, peer_hostname):
logger.info(f'[p2p] recv inv from {peer_hostname}')
new_blocks = [b for b in self.blocks if not locate_block(b.id)[0]]
if not new_blocks:
logger.info('[p2p] initial block download complete')
ibd_done.set()
return
for block in new_blocks:
connect_block(block)
new_tip_id = get_active_chain()[-1].id
logger.info(f'[p2p] continuing initial block download at {new_tip_id}')
with chain_lock:
# Recursive call to continue the initial block sync
send_to_peer(GetBlocksMsg(new_tip_id))
def test_reorg():
set_active_chain([])
for block in chain1:
assert connect_block(block) == ACTIVE_CHAIN_IDX
set_side_branches([])
mempool.clear()
utxo_set.clear()
_add_to_utxo_for_chain(get_active_chain())
def assert_no_change():
assert get_active_chain() == chain1
assert mempool == {}
assert [k.txid[:6] for k in utxo_set] == ['804da2', 'd961d7', '54b38d']
assert len(utxo_set) == 3
# No reorg necessary when side branches are empty
assert not reorg_if_necessary()
print(f'{[b.id for b in chain1]}')
from mini_core.merkle_trees import get_merkle_root_of_txns
print(f'{[get_merkle_root_of_txns(b.txns).value for b in chain2]}')
# No reorg necessary when side branch is shorter than the main chain
for block in chain2[1:2]:
assert connect_block(block) == 1
assert not reorg_if_necessary()
assert get_side_branches() == [chain2[1:2]]
assert_no_change()
# No reorg necessary when side branch is as long as the main chain.
assert connect_block(chain2[2]) == 1
assert not reorg_if_necessary()
assert get_side_branches() == [chain2[1:3]]
assert_no_change()
# No reorg necessary when side branch is a longer but invalid chain
# Block doesn't connect to anything because it's invalid
assert connect_block(chain3_faulty[3]) is None
assert not reorg_if_necessary()
# No change in side branches for an invalid block.
assert get_side_branches() == [chain2[1:3]]
assert_no_change()
# Reorg necessary when a side branch is longer than the main chain
assert connect_block(chain2[3]) == 1
assert connect_block(chain2[4]) == 1
# Chain1 was reorged into get_side_branches().
assert [len(c) for c in get_side_branches()] == [2]
assert [b.id for b in get_side_branches()[0]] == [b.id for b in chain1[1:]]
assert get_side_branches() == [chain1[1:]]
assert mempool == {}
print(f'{[tx.txid[:6] for tx in utxo_set]}')
assert [k.txid[:6] for k in utxo_set] == ['804da2', 'd961d7', '54b38d', '48f7f5', 'ac4700']