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fix early takeovers by not-yet activated claims

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Jack Robison 2021-05-26 17:25:03 -04:00 committed by Victor Shyba
parent 73da5a35b8
commit c0e2d56f55
5 changed files with 177 additions and 29 deletions
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113
lbry/wallet/server/block_processor.py
View file

@ -232,6 +232,10 @@ class BlockProcessor:
# used to process takeovers due to added activations
self.pending_activated: DefaultDict[str, DefaultDict[bytes, List[Tuple[PendingActivationKey, int]]]] = \
defaultdict(lambda: defaultdict(list))
# these are used for detecting early takeovers by not yet activated claims/supports
self.possible_future_activated_support: DefaultDict[bytes, List[int]] = defaultdict(list)
self.possible_future_activated_claim: Dict[Tuple[str, bytes], int] = {}
self.possible_future_support_txos: DefaultDict[bytes, List[Tuple[int, int]]] = defaultdict(list)
async def run_in_thread_with_lock(self, func, *args):
# Run in a thread to prevent blocking. Shielded so that
@ -579,6 +583,8 @@ class BlockProcessor:
def _get_pending_claim_amount(self, name: str, claim_hash: bytes, height=None) -> int:
if (name, claim_hash) in self.staged_activated_claim:
return self.staged_activated_claim[(name, claim_hash)]
if (name, claim_hash) in self.possible_future_activated_claim:
return self.possible_future_activated_claim[(name, claim_hash)]
return self.db._get_active_amount(claim_hash, ACTIVATED_CLAIM_TXO_TYPE, height or (self.height + 1))
def _get_pending_claim_name(self, claim_hash: bytes) -> Optional[str]:
@ -593,13 +599,15 @@ class BlockProcessor:
amount = self.db._get_active_amount(claim_hash, ACTIVATED_SUPPORT_TXO_TYPE, height or (self.height + 1)) or 0
if claim_hash in self.staged_activated_support:
amount += sum(self.staged_activated_support[claim_hash])
if claim_hash in self.possible_future_activated_support:
amount += sum(self.possible_future_activated_support[claim_hash])
if claim_hash in self.removed_active_support:
return amount - sum(self.removed_active_support[claim_hash])
return amount
def _get_pending_effective_amount(self, name: str, claim_hash: bytes, height: Optional[int] = None) -> int:
claim_amount = self._get_pending_claim_amount(name, claim_hash, height=height)
support_amount = self._get_pending_supported_amount(claim_hash)
support_amount = self._get_pending_supported_amount(claim_hash, height=height)
return claim_amount + support_amount
def _get_takeover_ops(self, height: int) -> List['RevertableOp']:
@ -615,6 +623,14 @@ class BlockProcessor:
_controlling = controlling_claims[_name]
return _controlling
ops = []
names_with_abandoned_controlling_claims: List[str] = []
# get the claims and supports previously scheduled to be activated at this block
activated_at_height = self.db.get_activated_at_height(height)
activate_in_future = defaultdict(lambda: defaultdict(list))
future_activations = defaultdict(dict)
def get_delayed_activate_ops(name: str, claim_hash: bytes, is_new_claim: bool, tx_num: int, nout: int,
amount: int, is_support: bool) -> List['RevertableOp']:
controlling = get_controlling(name)
@ -640,17 +656,20 @@ class BlockProcessor:
height, ACTIVATED_SUPPORT_TXO_TYPE if is_support else ACTIVATED_CLAIM_TXO_TYPE, tx_num, nout
)
)
else: # if the delay was higher if still needs to be considered if something else triggers a takeover
activate_in_future[name][claim_hash].append((
PendingActivationKey(
height + delay, ACTIVATED_SUPPORT_TXO_TYPE if is_support else ACTIVATED_CLAIM_TXO_TYPE,
tx_num, nout
), amount
))
if is_support:
self.possible_future_support_txos[claim_hash].append((tx_num, nout))
return StagedActivation(
ACTIVATED_SUPPORT_TXO_TYPE if is_support else ACTIVATED_CLAIM_TXO_TYPE, claim_hash, tx_num, nout,
height + delay, name, amount
).get_activate_ops()
ops = []
names_with_abandoned_controlling_claims: List[str] = []
# get the claims and supports previously scheduled to be activated at this block
activated_at_height = self.db.get_activated_at_height(height)
# determine names needing takeover/deletion due to controlling claims being abandoned
# and add ops to deactivate abandoned claims
for claim_hash, staged in self.staged_pending_abandoned.items():
@ -682,8 +701,9 @@ class BlockProcessor:
# prepare to activate or delay activation of the pending claims being added this block
for (tx_num, nout), staged in self.pending_claims.items():
ops.extend(get_delayed_activate_ops(staged.name, staged.claim_hash, not staged.is_update, tx_num, nout,
staged.amount, is_support=False))
ops.extend(get_delayed_activate_ops(
staged.name, staged.claim_hash, not staged.is_update, tx_num, nout, staged.amount, is_support=False
))
# and the supports
for (tx_num, nout), (claim_hash, amount) in self.pending_support_txos.items():
@ -696,8 +716,9 @@ class BlockProcessor:
k, v = self.db.get_claim_txo(claim_hash)
name = v.name
staged_is_new_claim = (v.root_tx_num, v.root_position) == (k.tx_num, k.position)
ops.extend(get_delayed_activate_ops(name, claim_hash, staged_is_new_claim, tx_num, nout, amount,
is_support=True))
ops.extend(get_delayed_activate_ops(
name, claim_hash, staged_is_new_claim, tx_num, nout, amount, is_support=True
))
# add the activation/delayed-activation ops
for activated, activated_txos in activated_at_height.items():
@ -779,15 +800,24 @@ class BlockProcessor:
# claim B is made for 0.2
# a block later, claim C is made for 0.3, it will schedule to activate 1 (or rarely 2) block(s) after B
# upon the delayed activation of B, we need to detect to activate C and make it take over early instead
future_activations = defaultdict(dict)
for activated, activated_txos in self.db.get_future_activated(height).items():
# uses the pending effective amount for the future activation height, not the current height
future_effective_amount = self._get_pending_effective_amount(
future_amount = self._get_pending_claim_amount(
activated.name, activated.claim_hash, activated_txos[-1].height + 1
)
v = future_effective_amount, activated, activated_txos[-1]
v = future_amount, activated, activated_txos[-1]
future_activations[activated.name][activated.claim_hash] = v
for name, future_activated in activate_in_future.items():
for claim_hash, activated in future_activated.items():
for txo in activated:
v = txo[1], PendingActivationValue(claim_hash, name), txo[0]
future_activations[name][claim_hash] = v
if v[2].is_claim:
self.possible_future_activated_claim[(name, claim_hash)] = v[0]
else:
self.possible_future_activated_support[claim_hash].append(v[0])
# process takeovers
checked_names = set()
for name, activated in self.pending_activated.items():
@ -807,32 +837,68 @@ class BlockProcessor:
amounts_with_future_activations = {claim_hash: amount for claim_hash, amount in amounts.items()}
amounts_with_future_activations.update(
{
claim_hash: effective_amount
for claim_hash, (effective_amount, _, _) in future_activations[name].items()
claim_hash: self._get_pending_effective_amount(
name, claim_hash, self.height + 1 + self.coin.maxTakeoverDelay
) for claim_hash in future_activations[name]
}
)
winning_including_future_activations = max(
amounts_with_future_activations, key=lambda x: amounts_with_future_activations[x]
)
print(amounts_with_future_activations)
print(amounts)
if winning_claim_hash != winning_including_future_activations:
print(f"\ttakeover of {name} by {winning_claim_hash.hex()} triggered early activation and "
f"takeover by {winning_including_future_activations.hex()} at {height}")
_, v, k = future_activations[name][winning_including_future_activations]
amount = self._get_pending_claim_amount(
name, winning_including_future_activations, k.height + 1
# handle a pending activated claim jumping the takeover delay when another name takes over
if winning_including_future_activations not in self.pending_claim_txos:
claim = self.db.get_claim_txo(winning_including_future_activations)
tx_num = claim[0].tx_num
position = claim[0].position
amount = claim[1].amount
activation = self.db.get_activation(tx_num, position)
else:
tx_num, position = self.pending_claim_txos[winning_including_future_activations]
amount = None
activation = None
for (k, tx_amount) in activate_in_future[name][winning_including_future_activations]:
if (k.tx_num, k.position) == (tx_num, position):
amount = tx_amount
activation = k.height
assert None not in (amount, activation)
ops.extend(
StagedActivation(
ACTIVATED_CLAIM_TXO_TYPE, winning_including_future_activations, tx_num,
position, activation, name, amount
).get_remove_activate_ops()
)
ops.extend(
StagedActivation(
ACTIVATED_CLAIM_TXO_TYPE, winning_including_future_activations, k.tx_num,
ACTIVATED_CLAIM_TXO_TYPE, winning_including_future_activations, tx_num,
position, height, name, amount
).get_activate_ops()
)
for (k, amount) in activate_in_future[name][winning_including_future_activations]:
txo = (k.tx_num, k.position)
if txo in self.possible_future_support_txos[winning_including_future_activations]:
t = ACTIVATED_SUPPORT_TXO_TYPE
else:
t = ACTIVATED_CLAIM_TXO_TYPE
ops.extend(
StagedActivation(
t, winning_including_future_activations, k.tx_num,
k.position, k.height, name, amount
).get_remove_activate_ops()
)
ops.extend(
StagedActivation(
ACTIVATED_CLAIM_TXO_TYPE, winning_including_future_activations, k.tx_num,
t, winning_including_future_activations, k.tx_num,
k.position, height, name, amount
).get_activate_ops()
)
ops.extend(get_takeover_name_ops(name, winning_including_future_activations, height, controlling))
elif not controlling or (winning_claim_hash != controlling.claim_hash and
name in names_with_abandoned_controlling_claims) or \
@ -875,9 +941,7 @@ class BlockProcessor:
if name in checked_names:
continue
checked_names.add(name)
controlling = get_controlling(name)
amounts = {
claim_hash: self._get_pending_effective_amount(name, claim_hash)
for claim_hash in self.db.get_claims_for_name(name) if claim_hash not in self.staged_pending_abandoned
@ -1012,6 +1076,9 @@ class BlockProcessor:
self.staged_activated_support.clear()
self.staged_activated_claim.clear()
self.pending_activated.clear()
self.possible_future_activated_claim.clear()
self.possible_future_activated_support.clear()
self.possible_future_support_txos.clear()
for cache in self.search_cache.values():
cache.clear()

5
lbry/wallet/server/db/claimtrie.py
View file

@ -3,6 +3,7 @@ from typing import Optional
from lbry.wallet.server.db.revertable import RevertablePut, RevertableDelete, RevertableOp, delete_prefix
from lbry.wallet.server.db import DB_PREFIXES
from lbry.wallet.server.db.prefixes import Prefixes, ClaimTakeoverValue
from lbry.wallet.server.db.prefixes import ACTIVATED_CLAIM_TXO_TYPE
def length_encoded_name(name: str) -> bytes:
@ -51,7 +52,9 @@ class StagedActivation(typing.NamedTuple):
def _get_add_remove_activate_ops(self, add=True):
op = RevertablePut if add else RevertableDelete
print(f"\t{'add' if add else 'remove'} {self.txo_type}, {self.tx_num}, {self.position}, activation={self.activation_height}, {self.name}")
print(f"\t{'add' if add else 'remove'} {'claim' if self.txo_type == ACTIVATED_CLAIM_TXO_TYPE else 'support'},"
f" {self.tx_num}, {self.position}, activation={self.activation_height}, {self.name}, "
f"amount={self.amount}")
return [
op(
*Prefixes.activated.pack_item(

2
lbry/wallet/server/leveldb.py
View file

@ -467,7 +467,7 @@ class LevelDB:
def get_future_activated(self, height: int) -> DefaultDict[PendingActivationValue, List[PendingActivationKey]]:
activated = defaultdict(list)
for i in range(self.coin.maxTakeoverDelay):
prefix = Prefixes.pending_activation.pack_partial_key(height+1+i, ACTIVATED_CLAIM_TXO_TYPE)
prefix = Prefixes.pending_activation.pack_partial_key(height+1+i)
for _k, _v in self.db.iterator(prefix=prefix):
k = Prefixes.pending_activation.unpack_key(_k)
v = Prefixes.pending_activation.unpack_value(_v)

3
lbry/wallet/server/session.py
View file

@ -1059,11 +1059,12 @@ class LBRYElectrumX(SessionBase):
rows = []
extra = []
stream = await self.db.fs_getclaimbyid(claim_id)
if not stream:
stream = LookupError(f"Could not find claim at {claim_id}")
rows.append(stream)
# print("claimtrie resolve %i rows %i extrat" % (len(rows), len(extra)))
return Outputs.to_base64(rows, extra, 0, None, None)
def assert_tx_hash(self, value):
'''Raise an RPCError if the value is not a valid transaction
hash.'''

77
tests/integration/blockchain/test_resolve_command.py
View file

@ -455,6 +455,83 @@ class ResolveClaimTakeovers(BaseResolveTestCase):
await self.generate(1)
await self.assertMatchClaimIsWinning(name, third_claim_id)
async def test_early_takeover_zero_delay(self):
name = 'derp'
# block 207
first_claim_id = (await self.stream_create(name, '0.1', allow_duplicate_name=True))['outputs'][0]['claim_id']
await self.assertMatchClaimIsWinning(name, first_claim_id)
await self.generate(96)
# block 304, activates at 307
second_claim_id = (await self.stream_create(name, '0.2', allow_duplicate_name=True))['outputs'][0]['claim_id']
await self.assertMatchClaimIsWinning(name, first_claim_id)
await self.generate(1)
await self.assertMatchClaimIsWinning(name, first_claim_id)
await self.generate(1)
await self.assertMatchClaimIsWinning(name, first_claim_id)
# on block 307 make a third claim with a yet higher amount, it takes over with no delay because the
# second claim activates and begins the takeover on this block
third_claim_id = (await self.stream_create(name, '0.3', allow_duplicate_name=True))['outputs'][0]['claim_id']
await self.assertMatchClaimIsWinning(name, third_claim_id)
await self.generate(1)
await self.assertMatchClaimIsWinning(name, third_claim_id)
async def test_early_takeover_from_support_zero_delay(self):
name = 'derp'
# block 207
first_claim_id = (await self.stream_create(name, '0.1', allow_duplicate_name=True))['outputs'][0]['claim_id']
await self.assertMatchClaimIsWinning(name, first_claim_id)
await self.generate(96)
# block 304, activates at 307
second_claim_id = (await self.stream_create(name, '0.2', allow_duplicate_name=True))['outputs'][0]['claim_id']
await self.assertMatchClaimIsWinning(name, first_claim_id)
await self.generate(1)
await self.assertMatchClaimIsWinning(name, first_claim_id)
third_claim_id = (await self.stream_create(name, '0.19', allow_duplicate_name=True))['outputs'][0]['claim_id']
await self.assertMatchClaimIsWinning(name, first_claim_id)
tx = await self.daemon.jsonrpc_support_create(third_claim_id, '0.1')
await self.ledger.wait(tx)
await self.generate(1)
await self.assertMatchClaimIsWinning(name, third_claim_id)
await self.generate(1)
await self.assertMatchClaimIsWinning(name, third_claim_id)
async def test_early_takeover_from_support_and_claim_zero_delay(self):
name = 'derp'
# block 207
first_claim_id = (await self.stream_create(name, '0.1', allow_duplicate_name=True))['outputs'][0]['claim_id']
await self.assertMatchClaimIsWinning(name, first_claim_id)
await self.generate(96)
# block 304, activates at 307
second_claim_id = (await self.stream_create(name, '0.2', allow_duplicate_name=True))['outputs'][0]['claim_id']
await self.assertMatchClaimIsWinning(name, first_claim_id)
await self.generate(1)
await self.assertMatchClaimIsWinning(name, first_claim_id)
await self.generate(1)
file_path = self.create_upload_file(data=b'hi!')
tx = await self.daemon.jsonrpc_stream_create(name, '0.19', file_path=file_path, allow_duplicate_name=True)
await self.ledger.wait(tx)
third_claim_id = tx.outputs[0].claim_id
wallet = self.daemon.wallet_manager.get_wallet_or_default(None)
funding_accounts = wallet.get_accounts_or_all(None)
amount = self.daemon.get_dewies_or_error("amount", '0.1')
account = wallet.get_account_or_default(None)
claim_address = await account.receiving.get_or_create_usable_address()
tx = await Transaction.support(
'derp', third_claim_id, amount, claim_address, funding_accounts, funding_accounts[0], None
)
await tx.sign(funding_accounts)
await self.daemon.broadcast_or_release(tx, True)
await self.ledger.wait(tx)
await self.generate(1)
await self.assertMatchClaimIsWinning(name, third_claim_id)
await self.generate(1)
await self.assertMatchClaimIsWinning(name, third_claim_id)
async def test_early_takeover_abandoned_controlling_support(self):
name = 'derp'
# block 207