lbry-sdk/tests/unit/test_ledger.py

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import os
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from binascii import hexlify
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from twisted.internet import defer
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from torba.coin.bitcoinsegwit import MainNetLedger
from torba.wallet import Wallet
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from .test_transaction import get_transaction, get_output
from .test_headers import BitcoinHeadersTestCase, block_bytes
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class MockNetwork:
def __init__(self, history, transaction):
self.history = history
self.transaction = transaction
self.address = None
self.get_history_called = []
self.get_transaction_called = []
def get_history(self, address):
self.get_history_called.append(address)
self.address = address
return defer.succeed(self.history)
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def get_merkle(self, txid, height):
return {'merkle': ['abcd01'], 'pos': 1}
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def get_transaction(self, tx_hash):
self.get_transaction_called.append(tx_hash)
return defer.succeed(self.transaction[tx_hash])
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class LedgerTestCase(BitcoinHeadersTestCase):
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def setUp(self):
super().setUp()
self.ledger = MainNetLedger({
'db': MainNetLedger.database_class(':memory:'),
'headers': MainNetLedger.headers_class(':memory:')
})
return self.ledger.db.open()
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def tearDown(self):
super().tearDown()
return self.ledger.db.close()
def make_header(self, **kwargs):
header = {
'bits': 486604799,
'block_height': 0,
'merkle_root': b'4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b',
'nonce': 2083236893,
'prev_block_hash': b'0000000000000000000000000000000000000000000000000000000000000000',
'timestamp': 1231006505,
'version': 1
}
header.update(kwargs)
header['merkle_root'] = header['merkle_root'].ljust(64, b'a')
header['prev_block_hash'] = header['prev_block_hash'].ljust(64, b'0')
return self.ledger.headers.serialize(header)
def add_header(self, **kwargs):
serialized = self.make_header(**kwargs)
self.ledger.headers.io.seek(0, os.SEEK_END)
self.ledger.headers.io.write(serialized)
self.ledger.headers._size = None
class TestSynchronization(LedgerTestCase):
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@defer.inlineCallbacks
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def test_update_history(self):
account = self.ledger.account_class.generate(self.ledger, Wallet(), "torba")
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address = yield account.receiving.get_or_create_usable_address()
address_details = yield self.ledger.db.get_address(address)
self.assertEqual(address_details['history'], None)
self.add_header(block_height=0, merkle_root=b'abcd04')
self.add_header(block_height=1, merkle_root=b'abcd04')
self.add_header(block_height=2, merkle_root=b'abcd04')
self.add_header(block_height=3, merkle_root=b'abcd04')
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self.ledger.network = MockNetwork([
{'tx_hash': 'abcd01', 'height': 0},
{'tx_hash': 'abcd02', 'height': 1},
{'tx_hash': 'abcd03', 'height': 2},
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], {
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'abcd01': hexlify(get_transaction(get_output(1)).raw),
'abcd02': hexlify(get_transaction(get_output(2)).raw),
'abcd03': hexlify(get_transaction(get_output(3)).raw),
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})
yield self.ledger.update_history(address)
self.assertEqual(self.ledger.network.get_history_called, [address])
self.assertEqual(self.ledger.network.get_transaction_called, ['abcd01', 'abcd02', 'abcd03'])
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address_details = yield self.ledger.db.get_address(address)
self.assertEqual(address_details['history'], 'abcd01:0:abcd02:1:abcd03:2:')
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self.ledger.network.get_history_called = []
self.ledger.network.get_transaction_called = []
yield self.ledger.update_history(address)
self.assertEqual(self.ledger.network.get_history_called, [address])
self.assertEqual(self.ledger.network.get_transaction_called, [])
self.ledger.network.history.append({'tx_hash': 'abcd04', 'height': 3})
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self.ledger.network.transaction['abcd04'] = hexlify(get_transaction(get_output(4)).raw)
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self.ledger.network.get_history_called = []
self.ledger.network.get_transaction_called = []
yield self.ledger.update_history(address)
self.assertEqual(self.ledger.network.get_history_called, [address])
self.assertEqual(self.ledger.network.get_transaction_called, ['abcd04'])
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address_details = yield self.ledger.db.get_address(address)
self.assertEqual(address_details['history'], 'abcd01:0:abcd02:1:abcd03:2:abcd04:3:')
class MocHeaderNetwork:
def __init__(self, responses):
self.responses = responses
def get_headers(self, height, blocks):
return self.responses[height]
class BlockchainReorganizationTests(LedgerTestCase):
@defer.inlineCallbacks
def test_1_block_reorganization(self):
self.ledger.network = MocHeaderNetwork({
20: {'height': 20, 'count': 5, 'hex': hexlify(
self.get_bytes(after=block_bytes(20), upto=block_bytes(5))
)},
25: {'height': 25, 'count': 0, 'hex': b''}
})
headers = self.ledger.headers
yield headers.connect(0, self.get_bytes(upto=block_bytes(20)))
self.add_header(block_height=len(headers))
self.assertEqual(headers.height, 20)
yield self.ledger.receive_header([{
'height': 21, 'hex': hexlify(self.make_header(block_height=21))
}])
@defer.inlineCallbacks
def test_3_block_reorganization(self):
self.ledger.network = MocHeaderNetwork({
20: {'height': 20, 'count': 5, 'hex': hexlify(
self.get_bytes(after=block_bytes(20), upto=block_bytes(5))
)},
21: {'height': 21, 'count': 1, 'hex': hexlify(self.make_header(block_height=21))},
22: {'height': 22, 'count': 1, 'hex': hexlify(self.make_header(block_height=22))},
25: {'height': 25, 'count': 0, 'hex': b''}
})
headers = self.ledger.headers
yield headers.connect(0, self.get_bytes(upto=block_bytes(20)))
self.add_header(block_height=len(headers))
self.add_header(block_height=len(headers))
self.add_header(block_height=len(headers))
self.assertEqual(headers.height, 22)
yield self.ledger.receive_header(({
'height': 23, 'hex': hexlify(self.make_header(block_height=23))
},))