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state.py
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state.py
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# pylint: disable=too-few-public-methods,too-many-arguments,too-many-instance-attributes
import random
from collections import defaultdict
from dataclasses import dataclass, field
from enum import Enum
from random import Random
import marshmallow
from eth_utils import to_hex
from raiden.constants import (
EMPTY_SECRETHASH,
LOCKSROOT_OF_NO_LOCKS,
NULL_ADDRESS_BYTES,
UINT64_MAX,
UINT256_MAX,
)
from raiden.transfer.architecture import (
BalanceProofSignedState,
BalanceProofUnsignedState,
ContractSendEvent,
SendMessageEvent,
State,
TransferTask,
)
from raiden.transfer.identifiers import CanonicalIdentifier, QueueIdentifier
from raiden.transfer.mediated_transfer.mediation_fee import FeeScheduleState
from raiden.utils.formatting import lpex, to_checksum_address
from raiden.utils.typing import (
Address,
AddressMetadata,
Any,
Balance,
BlockExpiration,
BlockHash,
BlockNumber,
BlockTimeout,
ChainID,
ChannelID,
Dict,
EncodedData,
FeeAmount,
List,
Locksroot,
MessageID,
Nonce,
Optional,
PaymentWithFeeAmount,
Secret,
SecretHash,
Signature,
T_Address,
T_BlockHash,
T_BlockNumber,
T_ChainID,
T_ChannelID,
T_PaymentWithFeeAmount,
T_Secret,
T_TokenAmount,
TokenAddress,
TokenAmount,
TokenNetworkAddress,
TokenNetworkRegistryAddress,
Tuple,
Union,
WithdrawAmount,
typecheck,
)
from raiden.utils.validation import MetadataValidation
QueueIdsToQueues = Dict[QueueIdentifier, List[SendMessageEvent]]
class ChannelState(Enum):
STATE_CLOSED = "closed"
STATE_CLOSING = "waiting_for_close"
STATE_OPENED = "opened"
STATE_SETTLED = "settled"
STATE_SETTLING = "waiting_for_settle"
STATE_UNUSABLE = "channel_unusable"
CHANNEL_STATES_PRIOR_TO_CLOSED = (ChannelState.STATE_OPENED, ChannelState.STATE_CLOSING)
CHANNEL_STATES_UP_TO_CLOSED = CHANNEL_STATES_PRIOR_TO_CLOSED + (ChannelState.STATE_CLOSED,)
CHANNEL_AFTER_CLOSE_STATES = (
ChannelState.STATE_CLOSED,
ChannelState.STATE_SETTLING,
ChannelState.STATE_SETTLED,
)
class NetworkState(Enum):
UNKNOWN = "unknown"
UNREACHABLE = "unreachable"
REACHABLE = "reachable"
def message_identifier_from_prng(prng: Random) -> MessageID:
return MessageID(prng.randint(0, UINT64_MAX))
@dataclass
class PaymentMappingState(State):
"""Global map from secrethash to a transfer task.
This mapping is used to quickly dispatch state changes by secrethash, for
those that don't have a balance proof, e.g. SecretReveal.
This mapping forces one task per secrethash, assuming that secrethash collision
is unlikely. Features like token swaps, that span multiple networks, must
be encapsulated in a single task to work with this structure.
"""
# Because of retries, there may be multiple transfers for the same payment,
# IOW there may be more than one task for the same transfer identifier. For
# this reason the mapping uses the secrethash as key.
#
# Because token swaps span multiple token networks, the state of the
# payment task is kept in this mapping, instead of inside an arbitrary
# token network.
secrethashes_to_task: Dict[SecretHash, TransferTask] = field(repr=False, default_factory=dict)
@dataclass
class HopState(State):
"""Information about the next hop."""
node_address: Address
channel_identifier: ChannelID
def __post_init__(self) -> None:
typecheck(self.node_address, T_Address)
@dataclass
class RouteState(MetadataValidation, State):
"""A possible route for a payment to a given target."""
# TODO: Add timestamp
route: List[Address]
address_to_metadata: Dict[Address, AddressMetadata] = field(default_factory=dict)
swaps: Dict[Address, TokenNetworkAddress] = field(default_factory=dict)
estimated_fee: FeeAmount = FeeAmount(0)
def __post_init__(self) -> None:
"""Validate address_to_metadata.
Currently any validation error will cause a :class:``ValueError`` to be raised.
This needs to be caught in higher layers.
In the future a more granular validation may be introduced.
"""
validation_errors = self.validate_address_metadata()
if validation_errors:
addresses_with_errors = ", ".join(
f"{to_checksum_address(address)}: {errors}"
for address, errors in validation_errors.items()
)
raise ValueError(f"Could not validate metadata {addresses_with_errors}.")
def get_metadata(self) -> Optional[Dict[Address, AddressMetadata]]:
return self.address_to_metadata
def hop_after(self, address: Address) -> Optional[Address]:
try:
idx = self.route.index(address)
return self.route[idx + 1]
except (ValueError, IndexError):
# The queried address was not in the route
# or the queried address was the last hop
return None
def __repr__(self) -> str:
return "RouteState ({}), fee: {}".format(
" -> ".join(to_checksum_address(addr) for addr in self.route),
self.estimated_fee,
)
@dataclass
class HashTimeLockState(State):
"""Represents a hash time lock."""
amount: PaymentWithFeeAmount
expiration: BlockExpiration
secrethash: SecretHash
encoded: EncodedData = field(init=False, repr=False)
def __post_init__(self) -> None:
typecheck(self.amount, T_PaymentWithFeeAmount)
typecheck(self.expiration, T_BlockNumber)
typecheck(self.secrethash, T_Secret)
from raiden.messages.transfers import Lock # put here to avoid cyclic dependencies
lock = Lock(amount=self.amount, expiration=self.expiration, secrethash=self.secrethash)
self.encoded = EncodedData(lock.as_bytes)
@dataclass
class UnlockPartialProofState(State):
"""Stores the lock along with its unlocking secret."""
lock: HashTimeLockState
secret: Secret = field(repr=False)
amount: PaymentWithFeeAmount = field(repr=False, default=PaymentWithFeeAmount(0))
expiration: BlockExpiration = field(repr=False, default=BlockExpiration(0))
secrethash: SecretHash = field(repr=False, default=EMPTY_SECRETHASH)
encoded: EncodedData = field(init=False, repr=False)
def __post_init__(self) -> None:
typecheck(self.lock, HashTimeLockState)
typecheck(self.secret, T_Secret)
self.amount = self.lock.amount
self.expiration = self.lock.expiration
self.secrethash = self.lock.secrethash
self.encoded = self.lock.encoded
@dataclass
class TransactionExecutionStatus(State):
"""Represents the status of a transaction."""
SUCCESS = "success"
FAILURE = "failure"
VALID_RESULT_VALUES = (SUCCESS, FAILURE)
started_block_number: Optional[BlockNumber] = None
finished_block_number: Optional[BlockNumber] = None
result: Optional[str] = None
def __post_init__(self) -> None:
is_valid_start = self.started_block_number is None or isinstance(
self.started_block_number, T_BlockNumber
)
is_valid_finish = self.finished_block_number is None or isinstance(
self.finished_block_number, T_BlockNumber
)
is_valid_result = self.result is None or self.result in self.VALID_RESULT_VALUES
is_valid_result = self.result is None or self.result in self.VALID_RESULT_VALUES
if not is_valid_start:
raise ValueError("started_block_number must be None or a block_number")
if not is_valid_finish:
raise ValueError("finished_block_number must be None or a block_number")
if not is_valid_result:
raise ValueError(f"result must be one of '{self.SUCCESS}', '{self.FAILURE}' or 'None'")
@dataclass
class SuccessfulTransactionState(State):
"""Represents the status of a transaction."""
finished_block_number: BlockNumber
started_block_number: Optional[BlockNumber] = None
def __post_init__(self) -> None:
is_valid_start = self.started_block_number is None or isinstance(
self.started_block_number, T_BlockNumber
)
is_valid_finish = isinstance(self.finished_block_number, T_BlockNumber)
if not is_valid_start:
raise ValueError("started_block_number must be None or a block_number")
if not is_valid_finish:
raise ValueError("finished_block_number must be None or a block_number")
@dataclass
class PendingLocksState(State):
locks: List[EncodedData]
def make_empty_pending_locks_state() -> PendingLocksState:
return PendingLocksState([])
@dataclass(order=True)
class TransactionChannelDeposit(State):
participant_address: Address
contract_balance: TokenAmount
deposit_block_number: BlockNumber
def __post_init__(self) -> None:
typecheck(self.participant_address, T_Address)
typecheck(self.contract_balance, T_TokenAmount)
typecheck(self.deposit_block_number, T_BlockNumber)
@dataclass
class ExpiredWithdrawState:
total_withdraw: WithdrawAmount
expiration: BlockExpiration
nonce: Nonce
recipient_metadata: Optional[AddressMetadata] = None
@dataclass
class PendingWithdrawState:
total_withdraw: WithdrawAmount
expiration: BlockExpiration
nonce: Nonce
recipient_metadata: Optional[AddressMetadata] = None
@dataclass
class CoopSettleState:
total_withdraw_initiator: WithdrawAmount
total_withdraw_partner: WithdrawAmount
expiration: BlockExpiration
partner_signature_request: Optional[Signature] = None
partner_signature_confirmation: Optional[Signature] = None
transaction: Optional[TransactionExecutionStatus] = None
@dataclass
class NettingChannelEndState(State):
"""The state of one of the nodes in a two party netting channel."""
address: Address
contract_balance: Balance
onchain_total_withdraw: WithdrawAmount = field(default=WithdrawAmount(0))
withdraws_pending: Dict[WithdrawAmount, PendingWithdrawState] = field(
repr=False, default_factory=dict
)
initiated_coop_settle: Optional[CoopSettleState] = field(default=None)
expired_coop_settles: List[CoopSettleState] = field(repr=False, default_factory=list)
withdraws_expired: List[ExpiredWithdrawState] = field(repr=False, default_factory=list)
#: Locks which have been introduced with a locked transfer, however the
#: secret is not known yet
secrethashes_to_lockedlocks: Dict[SecretHash, HashTimeLockState] = field(
repr=False, default_factory=dict
)
#: Locks for which the secret is known, but the partner has not sent an
#: unlock off chain yet.
secrethashes_to_unlockedlocks: Dict[SecretHash, UnlockPartialProofState] = field(
repr=False, default_factory=dict
)
#: Locks for which the secret is known, the partner has not sent an
#: unlocked off chain yet, and the secret has been registered onchain
#: before the lock has expired.
secrethashes_to_onchain_unlockedlocks: Dict[SecretHash, UnlockPartialProofState] = field(
repr=False, default_factory=dict
)
balance_proof: Optional[Union[BalanceProofSignedState, BalanceProofUnsignedState]] = None
#: A list of the pending locks, in order of insertion. Used for calculating
#: the locksroot.
pending_locks: PendingLocksState = field(
repr=False, default_factory=make_empty_pending_locks_state
)
onchain_locksroot: Locksroot = LOCKSROOT_OF_NO_LOCKS
nonce: Nonce = field(default=Nonce(0))
def __post_init__(self) -> None:
typecheck(self.address, T_Address)
typecheck(self.contract_balance, T_TokenAmount)
if self.address == NULL_ADDRESS_BYTES:
raise ValueError("address cannot be null.")
if self.contract_balance < 0:
raise ValueError("contract_balance cannot be negative.")
@property
def offchain_total_withdraw(self) -> WithdrawAmount:
return max(self.withdraws_pending, default=WithdrawAmount(0))
@property
def total_withdraw(self) -> WithdrawAmount:
return max(self.offchain_total_withdraw, self.onchain_total_withdraw)
@property
def transferred_amount(self) -> TokenAmount:
if self.balance_proof:
return self.balance_proof.transferred_amount
return TokenAmount(0)
@dataclass
class NettingChannelState(State):
"""The state of a netting channel."""
canonical_identifier: CanonicalIdentifier
token_address: TokenAddress = field(repr=False)
token_network_registry_address: TokenNetworkRegistryAddress = field(repr=False)
reveal_timeout: BlockTimeout = field(repr=False)
settle_timeout: BlockTimeout = field(repr=False)
fee_schedule: FeeScheduleState = field(repr=False)
our_state: NettingChannelEndState
partner_state: NettingChannelEndState
open_transaction: SuccessfulTransactionState
close_transaction: Optional[TransactionExecutionStatus] = None
settle_transaction: Optional[TransactionExecutionStatus] = None
update_transaction: Optional[TransactionExecutionStatus] = None
def __post_init__(self) -> None:
typecheck(self.reveal_timeout, int)
typecheck(self.settle_timeout, int)
typecheck(self.open_transaction, SuccessfulTransactionState)
typecheck(self.canonical_identifier.channel_identifier, T_ChannelID)
if self.our_state.address == self.partner_state.address:
raise ValueError("it is illegal to open a channel with itself")
if self.reveal_timeout <= 0:
raise ValueError("reveal_timeout must be a positive integer")
if self.settle_timeout <= 0:
raise ValueError("settle_timeout must be a positive integer")
if (
self.canonical_identifier.channel_identifier < 0
or self.canonical_identifier.channel_identifier > UINT256_MAX
):
raise ValueError("channel identifier should be a uint256")
valid_close_transaction = self.close_transaction is None or isinstance(
self.close_transaction, TransactionExecutionStatus
)
if not valid_close_transaction:
raise ValueError("close_transaction must be a TransactionExecutionStatus instance")
valid_settle_transaction = self.settle_transaction is None or isinstance(
self.settle_transaction, TransactionExecutionStatus
)
if not valid_settle_transaction:
raise ValueError(
"settle_transaction must be a TransactionExecutionStatus instance or None"
)
@property
def identifier(self) -> ChannelID:
return self.canonical_identifier.channel_identifier
@property
def token_network_address(self) -> TokenNetworkAddress:
return self.canonical_identifier.token_network_address
@property
def chain_id(self) -> ChainID:
return self.canonical_identifier.chain_identifier
@property
def our_total_deposit(self) -> Balance:
# pylint: disable=E1101
return self.our_state.contract_balance
@property
def our_total_withdraw(self) -> WithdrawAmount:
"""The current total withdraw.
If we only take offchain_total_withdraw, this means that it might go back to zero
as there aren't pending withdraws. Taking onchain_total_withdraw means that we might
be checking against a value that has been already increased by a pending offchain total
withdraw. Therefore, we take the bigger value of both.
"""
# pylint: disable=E1101
return self.our_state.total_withdraw
@property
def partner_total_deposit(self) -> Balance:
# pylint: disable=E1101
return self.partner_state.contract_balance
@property
def partner_total_withdraw(self) -> WithdrawAmount:
# pylint: disable=E1101
return self.partner_state.total_withdraw
@dataclass
class TokenNetworkState(State):
"""Corresponds to a token network smart contract."""
address: TokenNetworkAddress
token_address: TokenAddress
channelidentifiers_to_channels: Dict[ChannelID, NettingChannelState] = field(
repr=False, default_factory=dict
)
partneraddresses_to_channelidentifiers: Dict[Address, List[ChannelID]] = field(
repr=False, default_factory=lambda: defaultdict(list)
)
def __post_init__(self) -> None:
typecheck(self.address, T_Address)
typecheck(self.token_address, T_Address)
self.partneraddresses_to_channelidentifiers = defaultdict(
list, self.partneraddresses_to_channelidentifiers
)
@dataclass(init=False)
class TokenNetworkRegistryState(State):
"""Corresponds to a registry smart contract."""
class Meta:
unknown = marshmallow.EXCLUDE
fields = [
"address",
"token_network_list",
"tokennetworkaddresses_to_tokennetworks",
] # only serialize attributes needed for init
load_only = ["tokennetworkaddresses_to_tokennetworks"]
address: TokenNetworkRegistryAddress
token_network_list: List[TokenNetworkState]
tokenaddresses_to_tokennetworkaddresses: Dict[TokenAddress, TokenNetworkAddress] = field(
repr=False
)
tokennetworkaddresses_to_tokennetworks: Dict[TokenNetworkAddress, TokenNetworkState] = field(
repr=False, default_factory=dict
)
def __init__(
self,
address: TokenNetworkRegistryAddress,
token_network_list: List[TokenNetworkState],
tokennetworkaddresses_to_tokennetworks: Dict[Any, TokenNetworkState] = None,
) -> None:
# Fix inconsistent state from Alderaan releases. Can be removed when
# only reading state from Bespin or later is acceptable. Those releases
# could leave the token_network_list empty, even after TNs have been
# added. The TNs were only available in the other attributes. See
# https://github.com/raiden-network/raiden/commit/922e4fdf0d54c150c1bada0d101f8085e04b68bd
if not token_network_list and tokennetworkaddresses_to_tokennetworks:
token_network_list = list(tokennetworkaddresses_to_tokennetworks.values())
self.address = address
self.token_network_list = []
self.tokennetworkaddresses_to_tokennetworks = {}
self.tokenaddresses_to_tokennetworkaddresses = {}
for tn in token_network_list:
self.add_token_network(tn)
def add_token_network(self, token_network: TokenNetworkState) -> None:
self.token_network_list.append(token_network)
self.tokennetworkaddresses_to_tokennetworks[token_network.address] = token_network
self.tokenaddresses_to_tokennetworkaddresses[
token_network.token_address
] = token_network.address
@dataclass(repr=False)
class ChainState(State):
"""Umbrella object that stores the per blockchain state.
For each registry smart contract there must be a token network registry. Within the
token network registry the existing token networks and channels are registered.
TODO: Split the node specific attributes to a "NodeState" class
"""
pseudo_random_generator: random.Random = field(compare=False)
block_number: BlockNumber
block_hash: BlockHash
our_address: Address
chain_id: ChainID
identifiers_to_tokennetworkregistries: Dict[
TokenNetworkRegistryAddress, TokenNetworkRegistryState
] = field(repr=False, default_factory=dict)
payment_mapping: PaymentMappingState = field(repr=False, default_factory=PaymentMappingState)
pending_transactions: List[ContractSendEvent] = field(repr=False, default_factory=list)
queueids_to_queues: QueueIdsToQueues = field(repr=False, default_factory=dict)
tokennetworkaddresses_to_tokennetworkregistryaddresses: Dict[
TokenNetworkAddress, TokenNetworkRegistryAddress
] = field(repr=False, default_factory=dict)
def __post_init__(self) -> None:
typecheck(self.block_number, T_BlockNumber)
typecheck(self.block_hash, T_BlockHash)
typecheck(self.chain_id, T_ChainID)
def __repr__(self) -> str:
return (
"ChainState(block_number={} block_hash={} networks={} qty_transfers={} chain_id={})"
).format(
self.block_number,
to_hex(self.block_hash),
# pylint: disable=E1101
lpex(self.identifiers_to_tokennetworkregistries.keys()),
# pylint: disable=E1101
len(self.payment_mapping.secrethashes_to_task),
self.chain_id,
)
@property
def addresses_to_channel(
self,
) -> Dict[Tuple[TokenNetworkAddress, Address], NettingChannelState]:
"""Find the channel for a partner by his address and token network"""
return {
(token_network.address, channel.partner_state.address): channel
for token_network_registry in self.identifiers_to_tokennetworkregistries.values()
for token_network in token_network_registry.token_network_list
for channel in token_network.channelidentifiers_to_channels.values()
}
def get_address_metadata(
address: Address, route_states: List[RouteState]
) -> Optional[AddressMetadata]:
for route_state in route_states:
recipient_metadata = route_state.address_to_metadata.get(address, None)
if recipient_metadata is not None:
return recipient_metadata
return None