def test_apply_transaction_with_previous_tx_not_exist_should_fail(
self, child_chain):
DUMMY_TX_KEY = b'8b76243a95f959bf101248474e6bdacdedc8ad995d287c24616a41bd51642965'
# token with uid 3 doesn't exist
tx = Transaction(prev_block=1,
uid=3,
amount=10,
new_owner=self.DUMMY_TX_NEW_OWNER)
tx.sign(eth_utils.normalize_key(DUMMY_TX_KEY))
with pytest.raises(PreviousTxNotFoundException):
child_chain.apply_transaction(rlp.encode(tx).hex())
def test_apply_transaction_with_double_spending(self, child_chain):
DUMMY_TX_KEY = b'8b76243a95f959bf101248474e6bdacdedc8ad995d287c24616a41bd51642965'
tx = Transaction(prev_block=1,
uid=1,
amount=10,
new_owner=self.DUMMY_TX_NEW_OWNER)
tx.sign(eth_utils.normalize_key(DUMMY_TX_KEY))
child_chain.apply_transaction(rlp.encode(tx).hex())
# try to spend a spent transaction
with pytest.raises(TxAlreadySpentException):
child_chain.apply_transaction(rlp.encode(tx).hex())
def transferToken(prev_block, uid, amount, new_owner, owner_key):
# client = Client(container.get_root_chain(), container.get_child_chain_client(), owner_key)
# client.send_transaction(prev_block, uid, amount, new_owner)
new_owner = utils.normalize_address(new_owner)
tx = Transaction(prev_block, uid, amount, new_owner)
owner_key = utils.normalize_key(owner_key)
tx.sign(owner_key)
# self.child_chain.send_transaction(rlp.encode(tx, Transaction).hex())
encoded_txn = rlp.encode(tx, Transaction).hex()
payload = {'tx': encoded_txn}
response = requests.post("http://localhost:8546/send_tx", data=payload)
print(response.status_code)
if response.status_code == 200:
print(response.content)
def make_transfer(self, prev_block, uid, amount, new_owner):
try:
new_owner = utils.normalize_address(new_owner)
tx = Transaction(prev_block, uid, amount, new_owner)
tx.sign(self.key)
encoded_txn = rlp.encode(tx, Transaction).hex()
payload = {'tx': encoded_txn}
response = requests.post(f"{self.child_chain}/send_tx",
data=payload)
if response.status_code == 200:
return response.status_code, response.content.hex()
else:
return response.status_code, None
except:
print("exception occur in make_transfer function")
return None, None
def test_apply_transaction(self, child_chain):
DUMMY_TX_KEY = b'8b76243a95f959bf101248474e6bdacdedc8ad995d287c24616a41bd51642965'
tx = Transaction(prev_block=1,
uid=1,
amount=10,
new_owner=self.DUMMY_TX_NEW_OWNER)
tx.sign(eth_utils.normalize_key(DUMMY_TX_KEY))
child_chain.apply_transaction(rlp.encode(tx).hex())
prev_tx = child_chain.db.get_block(1).transaction_set[0]
assert child_chain.current_block.transaction_set[0] == tx
assert prev_tx.new_owner == tx.sender
assert prev_tx.amount == tx.amount
assert prev_tx.spent is True
def test_constructor_default_empty_sig(self):
DUMMY_TX_OWNER = b'\x8cT\xa4\xa0\x17\x9f$\x80\x1fI\xf92-\xab<\x87\xeb\x19L\x9b'
tx = Transaction(prev_block=0,
uid=1,
amount=10,
new_owner=DUMMY_TX_OWNER)
assert tx.sig == b'\x00' * 65
def test_add_tx(self, block):
dummy_tx = Transaction(prev_block=0,
uid=2,
amount=10,
new_owner=self.DUMMY_TX_OWNER)
block.add_tx(dummy_tx)
assert len(block.transaction_set) == 2
assert dummy_tx in block.transaction_set
def userC_starts_to_exit_some_eth_from_plasma_cash(context, amount):
client = container.get_client()
deposit_block = client.get_block(DEPOSIT_TX_BLOCK)
deposit_tx = deposit_block.get_tx_by_uid(uid)
deposit_block.merklize_transaction_set()
deposit_tx_proof = deposit_block.merkle.create_merkle_proof(uid)
# invalid tx doesn't exist in child chain
invalid_tx = Transaction(DEPOSIT_TX_BLOCK, uid, 1,
utils.normalize_address(userC))
invalid_tx.sign(utils.normalize_key(userA_key))
invalid_tx_merkle = SparseMerkleTree(257, {uid: invalid_tx.merkle_hash})
invalid_tx_proof = invalid_tx_merkle.create_merkle_proof(uid)
root_chain = container.get_root_chain()
root_chain.functions.startExit(
rlp.encode(deposit_tx), deposit_tx_proof, DEPOSIT_TX_BLOCK,
rlp.encode(invalid_tx), invalid_tx_proof,
TRANSFER_TX_2_BLOCK).transact({'from': userC})
time.sleep(5)
def child_chain(self):
DUMMY_TX_OWNER = b'\x8cT\xa4\xa0\x17\x9f$\x80\x1fI\xf92-\xab<\x87\xeb\x19L\x9b'
deposit_filter = mock()
when(self.ROOT_CHAIN).on('Deposit').thenReturn(deposit_filter)
child_chain = ChildChain(authority=self.DUMMY_AUTHORITY,
root_chain=self.ROOT_CHAIN)
# create a dummy transaction
tx = Transaction(prev_block=0, uid=1, amount=10, new_owner=DUMMY_TX_OWNER)
# create a block with the dummy transaction
child_chain.blocks[1] = Block([tx])
child_chain.current_block_number = 2
return child_chain
def child_chain(self, root_chain, db):
DUMMY_TX_OWNER = b'\x8cT\xa4\xa0\x17\x9f$\x80\x1fI\xf92-\xab<\x87\xeb\x19L\x9b'
expect(root_chain).eventFilter('Deposit', {'fromBlock': 0})
expect(Thread).start()
child_chain = ChildChain(self.DUMMY_AUTHORITY, root_chain, db)
# create a dummy transaction
tx = Transaction(prev_block=0,
uid=1,
amount=10,
new_owner=DUMMY_TX_OWNER)
# create a block with the dummy transaction
db.save_block(Block([tx]), 1)
child_chain.current_block_number = 2
db.increment_current_block_num()
return child_chain
def test_constructor(self):
PREV_BLOCK = 1
UID = 'uid'
AMOUNT = 1
NEW_OWNER = 'new owner'
SIG = 'sig'
tx = Transaction(prev_block=PREV_BLOCK,
uid=UID,
amount=AMOUNT,
new_owner=NEW_OWNER,
sig=SIG)
assert tx.prev_block == PREV_BLOCK
assert tx.uid == UID
assert tx.amount == AMOUNT
assert tx.new_owner == NEW_OWNER
assert tx.sig == SIG
assert tx.spent is False
def send_transaction(self, prev_block, uid, amount, new_owner, key):
new_owner = utils.normalize_address(new_owner)
key = utils.normalize_key(key)
tx = Transaction(prev_block, uid, amount, new_owner)
tx.sign(key)
self.child_chain.send_transaction(rlp.encode(tx, Transaction).hex())
def _generate_dummy_block(self):
owner = b'\x8cT\xa4\xa0\x17\x9f$\x80\x1fI\xf92-\xab<\x87\xeb\x19L\x9b'
tx = Transaction(prev_block=0, uid=1, amount=10, new_owner=owner)
block = Block(transaction_set=[tx])
return block
def block(self):
tx = Transaction(prev_block=0,
uid=self.UID,
amount=10,
new_owner=self.DUMMY_TX_OWNER)
return Block(transaction_set=[tx])
def tx(self):
DUMMY_TX_OWNER = b'\x8cT\xa4\xa0\x17\x9f$\x80\x1fI\xf92-\xab<\x87\xeb\x19L\x9b'
return Transaction(prev_block=0,
uid=1,
amount=10,
new_owner=DUMMY_TX_OWNER)