forked from LBRYCommunity/lbry-sdk
640 lines
25 KiB
Python
640 lines
25 KiB
Python
import os
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import time
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import json
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import logging
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import typing
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import asyncio
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import random
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from functools import partial
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from hashlib import sha256
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from string import hexdigits
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from typing import Type, Dict, Tuple, Optional, Any, List
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import ecdsa
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from lbry.error import InvalidPasswordError
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from lbry.crypto.crypt import aes_encrypt, aes_decrypt
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from .bip32 import PrivateKey, PubKey, from_extended_key_string
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from .mnemonic import Mnemonic
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from .constants import COIN, CLAIM_TYPES, TXO_TYPES
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from .transaction import Transaction, Input, Output
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if typing.TYPE_CHECKING:
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from .ledger import Ledger
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from .wallet import Wallet
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log = logging.getLogger(__name__)
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def validate_claim_id(claim_id):
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if not len(claim_id) == 40:
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raise Exception("Incorrect claimid length: %i" % len(claim_id))
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if isinstance(claim_id, bytes):
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claim_id = claim_id.decode('utf-8')
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if set(claim_id).difference(hexdigits):
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raise Exception("Claim id is not hex encoded")
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class AddressManager:
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name: str
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__slots__ = 'account', 'public_key', 'chain_number', 'address_generator_lock'
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def __init__(self, account, public_key, chain_number):
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self.account = account
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self.public_key = public_key
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self.chain_number = chain_number
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self.address_generator_lock = asyncio.Lock()
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@classmethod
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def from_dict(cls, account: 'Account', d: dict) \
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-> Tuple['AddressManager', 'AddressManager']:
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raise NotImplementedError
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@classmethod
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def to_dict(cls, receiving: 'AddressManager', change: 'AddressManager') -> Dict:
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d: Dict[str, Any] = {'name': cls.name}
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receiving_dict = receiving.to_dict_instance()
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if receiving_dict:
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d['receiving'] = receiving_dict
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change_dict = change.to_dict_instance()
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if change_dict:
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d['change'] = change_dict
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return d
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def merge(self, d: dict):
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pass
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def to_dict_instance(self) -> Optional[dict]:
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raise NotImplementedError
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def _query_addresses(self, **constraints):
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return self.account.ledger.db.get_addresses(
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read_only=constraints.pop("read_only", False),
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accounts=[self.account],
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chain=self.chain_number,
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**constraints
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)
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def get_private_key(self, index: int) -> PrivateKey:
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raise NotImplementedError
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def get_public_key(self, index: int) -> PubKey:
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raise NotImplementedError
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async def get_max_gap(self):
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raise NotImplementedError
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async def ensure_address_gap(self):
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raise NotImplementedError
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def get_address_records(self, only_usable: bool = False, **constraints):
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raise NotImplementedError
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async def get_addresses(self, only_usable: bool = False, **constraints) -> List[str]:
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records = await self.get_address_records(only_usable=only_usable, **constraints)
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return [r['address'] for r in records]
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async def get_or_create_usable_address(self) -> str:
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addresses = await self.get_addresses(only_usable=True, limit=10)
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if addresses:
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return random.choice(addresses)
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addresses = await self.ensure_address_gap()
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return addresses[0]
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class HierarchicalDeterministic(AddressManager):
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""" Implements simple version of Bitcoin Hierarchical Deterministic key management. """
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name: str = "deterministic-chain"
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__slots__ = 'gap', 'maximum_uses_per_address'
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def __init__(self, account: 'Account', chain: int, gap: int, maximum_uses_per_address: int) -> None:
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super().__init__(account, account.public_key.child(chain), chain)
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self.gap = gap
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self.maximum_uses_per_address = maximum_uses_per_address
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@classmethod
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def from_dict(cls, account: 'Account', d: dict) -> Tuple[AddressManager, AddressManager]:
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return (
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cls(account, 0, **d.get('receiving', {'gap': 20, 'maximum_uses_per_address': 1})),
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cls(account, 1, **d.get('change', {'gap': 6, 'maximum_uses_per_address': 1}))
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)
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def merge(self, d: dict):
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self.gap = d.get('gap', self.gap)
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self.maximum_uses_per_address = d.get('maximum_uses_per_address', self.maximum_uses_per_address)
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def to_dict_instance(self):
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return {'gap': self.gap, 'maximum_uses_per_address': self.maximum_uses_per_address}
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def get_private_key(self, index: int) -> PrivateKey:
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return self.account.private_key.child(self.chain_number).child(index)
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def get_public_key(self, index: int) -> PubKey:
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return self.account.public_key.child(self.chain_number).child(index)
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async def get_max_gap(self) -> int:
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addresses = await self._query_addresses(order_by="n asc")
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max_gap = 0
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current_gap = 0
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for address in addresses:
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if address['used_times'] == 0:
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current_gap += 1
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else:
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max_gap = max(max_gap, current_gap)
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current_gap = 0
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return max_gap
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async def ensure_address_gap(self) -> List[str]:
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async with self.address_generator_lock:
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addresses = await self._query_addresses(limit=self.gap, order_by="n desc")
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existing_gap = 0
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for address in addresses:
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if address['used_times'] == 0:
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existing_gap += 1
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else:
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break
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if existing_gap == self.gap:
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return []
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start = addresses[0]['pubkey'].n+1 if addresses else 0
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end = start + (self.gap - existing_gap)
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new_keys = await self._generate_keys(start, end-1)
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await self.account.ledger.announce_addresses(self, new_keys)
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return new_keys
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async def _generate_keys(self, start: int, end: int) -> List[str]:
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if not self.address_generator_lock.locked():
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raise RuntimeError('Should not be called outside of address_generator_lock.')
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keys = [self.public_key.child(index) for index in range(start, end+1)]
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await self.account.ledger.db.add_keys(self.account, self.chain_number, keys)
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return [key.address for key in keys]
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def get_address_records(self, only_usable: bool = False, **constraints):
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if only_usable:
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constraints['used_times__lt'] = self.maximum_uses_per_address
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if 'order_by' not in constraints:
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constraints['order_by'] = "used_times asc, n asc"
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return self._query_addresses(**constraints)
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class SingleKey(AddressManager):
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""" Single Key address manager always returns the same address for all operations. """
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name: str = "single-address"
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__slots__ = ()
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@classmethod
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def from_dict(cls, account: 'Account', d: dict) \
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-> Tuple[AddressManager, AddressManager]:
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same_address_manager = cls(account, account.public_key, 0)
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return same_address_manager, same_address_manager
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def to_dict_instance(self):
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return None
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def get_private_key(self, index: int) -> PrivateKey:
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return self.account.private_key
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def get_public_key(self, index: int) -> PubKey:
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return self.account.public_key
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async def get_max_gap(self) -> int:
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return 0
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async def ensure_address_gap(self) -> List[str]:
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async with self.address_generator_lock:
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exists = await self.get_address_records()
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if not exists:
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await self.account.ledger.db.add_keys(self.account, self.chain_number, [self.public_key])
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new_keys = [self.public_key.address]
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await self.account.ledger.announce_addresses(self, new_keys)
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return new_keys
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return []
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def get_address_records(self, only_usable: bool = False, **constraints):
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return self._query_addresses(**constraints)
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class Account:
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mnemonic_class = Mnemonic
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private_key_class = PrivateKey
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public_key_class = PubKey
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address_generators: Dict[str, Type[AddressManager]] = {
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SingleKey.name: SingleKey,
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HierarchicalDeterministic.name: HierarchicalDeterministic,
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}
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def __init__(self, ledger: 'Ledger', wallet: 'Wallet', name: str,
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seed: str, private_key_string: str, encrypted: bool,
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private_key: Optional[PrivateKey], public_key: PubKey,
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address_generator: dict, modified_on: float, channel_keys: dict) -> None:
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self.ledger = ledger
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self.wallet = wallet
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self.id = public_key.address
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self.name = name
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self.seed = seed
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self.modified_on = modified_on
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self.private_key_string = private_key_string
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self.init_vectors: Dict[str, bytes] = {}
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self.encrypted = encrypted
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self.private_key = private_key
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self.public_key = public_key
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generator_name = address_generator.get('name', HierarchicalDeterministic.name)
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self.address_generator = self.address_generators[generator_name]
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self.receiving, self.change = self.address_generator.from_dict(self, address_generator)
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self.address_managers = {am.chain_number: am for am in {self.receiving, self.change}}
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self.channel_keys = channel_keys
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ledger.add_account(self)
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wallet.add_account(self)
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def get_init_vector(self, key) -> Optional[bytes]:
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init_vector = self.init_vectors.get(key, None)
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if init_vector is None:
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init_vector = self.init_vectors[key] = os.urandom(16)
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return init_vector
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@classmethod
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def generate(cls, ledger: 'Ledger', wallet: 'Wallet',
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name: str = None, address_generator: dict = None):
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return cls.from_dict(ledger, wallet, {
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'name': name,
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'seed': cls.mnemonic_class().make_seed(),
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'address_generator': address_generator or {}
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})
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@classmethod
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def get_private_key_from_seed(cls, ledger: 'Ledger', seed: str, password: str):
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return cls.private_key_class.from_seed(
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ledger, cls.mnemonic_class.mnemonic_to_seed(seed, password or 'lbryum')
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)
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@classmethod
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def keys_from_dict(cls, ledger: 'Ledger', d: dict) \
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-> Tuple[str, Optional[PrivateKey], PubKey]:
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seed = d.get('seed', '')
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private_key_string = d.get('private_key', '')
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private_key = None
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public_key = None
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encrypted = d.get('encrypted', False)
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if not encrypted:
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if seed:
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private_key = cls.get_private_key_from_seed(ledger, seed, '')
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public_key = private_key.public_key
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elif private_key_string:
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private_key = from_extended_key_string(ledger, private_key_string)
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public_key = private_key.public_key
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if public_key is None:
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public_key = from_extended_key_string(ledger, d['public_key'])
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return seed, private_key, public_key
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@classmethod
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def from_dict(cls, ledger: 'Ledger', wallet: 'Wallet', d: dict):
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seed, private_key, public_key = cls.keys_from_dict(ledger, d)
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name = d.get('name')
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if not name:
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name = f'Account #{public_key.address}'
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return cls(
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ledger=ledger,
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wallet=wallet,
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name=name,
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seed=seed,
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private_key_string=d.get('private_key', ''),
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encrypted=d.get('encrypted', False),
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private_key=private_key,
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public_key=public_key,
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address_generator=d.get('address_generator', {}),
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modified_on=d.get('modified_on', time.time()),
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channel_keys=d.get('certificates', {})
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)
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def to_dict(self, encrypt_password: str = None, include_channel_keys: bool = True):
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private_key_string, seed = self.private_key_string, self.seed
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if not self.encrypted and self.private_key:
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private_key_string = self.private_key.extended_key_string()
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if not self.encrypted and encrypt_password:
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if private_key_string:
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private_key_string = aes_encrypt(
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encrypt_password, private_key_string, self.get_init_vector('private_key')
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)
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if seed:
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seed = aes_encrypt(encrypt_password, self.seed, self.get_init_vector('seed'))
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d = {
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'ledger': self.ledger.get_id(),
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'name': self.name,
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'seed': seed,
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'encrypted': bool(self.encrypted or encrypt_password),
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'private_key': private_key_string,
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'public_key': self.public_key.extended_key_string(),
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'address_generator': self.address_generator.to_dict(self.receiving, self.change),
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'modified_on': self.modified_on
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}
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if include_channel_keys:
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d['certificates'] = self.channel_keys
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return d
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def merge(self, d: dict):
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if d.get('modified_on', 0) > self.modified_on:
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self.name = d['name']
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self.modified_on = d.get('modified_on', time.time())
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assert self.address_generator.name == d['address_generator']['name']
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for chain_name in ('change', 'receiving'):
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if chain_name in d['address_generator']:
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chain_object = getattr(self, chain_name)
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chain_object.merge(d['address_generator'][chain_name])
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self.channel_keys.update(d.get('certificates', {}))
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@property
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def hash(self) -> bytes:
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assert not self.encrypted, "Cannot hash an encrypted account."
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h = sha256(json.dumps(self.to_dict(include_channel_keys=False)).encode())
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for cert in sorted(self.channel_keys.keys()):
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h.update(cert.encode())
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return h.digest()
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async def get_details(self, show_seed=False, **kwargs):
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satoshis = await self.get_balance(**kwargs)
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details = {
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'id': self.id,
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'name': self.name,
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'ledger': self.ledger.get_id(),
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'coins': round(satoshis/COIN, 2),
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'satoshis': satoshis,
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'encrypted': self.encrypted,
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'public_key': self.public_key.extended_key_string(),
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'address_generator': self.address_generator.to_dict(self.receiving, self.change)
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}
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if show_seed:
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details['seed'] = self.seed
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details['certificates'] = len(self.channel_keys)
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return details
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def decrypt(self, password: str) -> bool:
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assert self.encrypted, "Key is not encrypted."
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try:
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seed = self._decrypt_seed(password)
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except (ValueError, InvalidPasswordError):
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return False
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try:
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private_key = self._decrypt_private_key_string(password)
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except (TypeError, ValueError, InvalidPasswordError):
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return False
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self.seed = seed
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self.private_key = private_key
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self.private_key_string = ""
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self.encrypted = False
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return True
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def _decrypt_private_key_string(self, password: str) -> Optional[PrivateKey]:
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if not self.private_key_string:
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return None
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private_key_string, self.init_vectors['private_key'] = aes_decrypt(password, self.private_key_string)
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if not private_key_string:
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return None
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return from_extended_key_string(
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self.ledger, private_key_string
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)
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def _decrypt_seed(self, password: str) -> str:
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if not self.seed:
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return ""
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seed, self.init_vectors['seed'] = aes_decrypt(password, self.seed)
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if not seed:
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return ""
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try:
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Mnemonic().mnemonic_decode(seed)
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except IndexError:
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# failed to decode the seed, this either means it decrypted and is invalid
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# or that we hit an edge case where an incorrect password gave valid padding
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raise ValueError("Failed to decode seed.")
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return seed
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def encrypt(self, password: str) -> bool:
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assert not self.encrypted, "Key is already encrypted."
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if self.seed:
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self.seed = aes_encrypt(password, self.seed, self.get_init_vector('seed'))
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if isinstance(self.private_key, PrivateKey):
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self.private_key_string = aes_encrypt(
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password, self.private_key.extended_key_string(), self.get_init_vector('private_key')
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)
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self.private_key = None
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self.encrypted = True
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return True
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async def ensure_address_gap(self):
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addresses = []
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for address_manager in self.address_managers.values():
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new_addresses = await address_manager.ensure_address_gap()
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addresses.extend(new_addresses)
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return addresses
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async def get_addresses(self, read_only=False, **constraints) -> List[str]:
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rows = await self.ledger.db.select_addresses('address', read_only=read_only, accounts=[self], **constraints)
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return [r[0] for r in rows]
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def get_address_records(self, **constraints):
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return self.ledger.db.get_addresses(accounts=[self], **constraints)
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def get_address_count(self, **constraints):
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return self.ledger.db.get_address_count(accounts=[self], **constraints)
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def get_private_key(self, chain: int, index: int) -> PrivateKey:
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assert not self.encrypted, "Cannot get private key on encrypted wallet account."
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return self.address_managers[chain].get_private_key(index)
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def get_public_key(self, chain: int, index: int) -> PubKey:
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return self.address_managers[chain].get_public_key(index)
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def get_balance(self, confirmations=0, include_claims=False, read_only=False, **constraints):
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if not include_claims:
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constraints.update({'txo_type__in': (0, TXO_TYPES['purchase'])})
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if confirmations > 0:
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height = self.ledger.headers.height - (confirmations-1)
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constraints.update({'height__lte': height, 'height__gt': 0})
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return self.ledger.db.get_balance(accounts=[self], read_only=read_only, **constraints)
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async def get_max_gap(self):
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change_gap = await self.change.get_max_gap()
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receiving_gap = await self.receiving.get_max_gap()
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return {
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'max_change_gap': change_gap,
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'max_receiving_gap': receiving_gap,
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}
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def get_txos(self, **constraints):
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return self.ledger.get_txos(wallet=self.wallet, accounts=[self], **constraints)
|
|
|
|
def get_txo_count(self, **constraints):
|
|
return self.ledger.get_txo_count(wallet=self.wallet, accounts=[self], **constraints)
|
|
|
|
def get_utxos(self, **constraints):
|
|
return self.ledger.get_utxos(wallet=self.wallet, accounts=[self], **constraints)
|
|
|
|
def get_utxo_count(self, **constraints):
|
|
return self.ledger.get_utxo_count(wallet=self.wallet, accounts=[self], **constraints)
|
|
|
|
def get_transactions(self, **constraints):
|
|
return self.ledger.get_transactions(wallet=self.wallet, accounts=[self], **constraints)
|
|
|
|
def get_transaction_count(self, **constraints):
|
|
return self.ledger.get_transaction_count(wallet=self.wallet, accounts=[self], **constraints)
|
|
|
|
async def fund(self, to_account, amount=None, everything=False,
|
|
outputs=1, broadcast=False, **constraints):
|
|
assert self.ledger == to_account.ledger, 'Can only transfer between accounts of the same ledger.'
|
|
if everything:
|
|
utxos = await self.get_utxos(**constraints)
|
|
await self.ledger.reserve_outputs(utxos)
|
|
tx = await Transaction.create(
|
|
inputs=[Input.spend(txo) for txo in utxos],
|
|
outputs=[],
|
|
funding_accounts=[self],
|
|
change_account=to_account
|
|
)
|
|
elif amount > 0:
|
|
to_address = await to_account.change.get_or_create_usable_address()
|
|
to_hash160 = to_account.ledger.address_to_hash160(to_address)
|
|
tx = await Transaction.create(
|
|
inputs=[],
|
|
outputs=[
|
|
Output.pay_pubkey_hash(amount//outputs, to_hash160)
|
|
for _ in range(outputs)
|
|
],
|
|
funding_accounts=[self],
|
|
change_account=self
|
|
)
|
|
else:
|
|
raise ValueError('An amount is required.')
|
|
|
|
if broadcast:
|
|
await self.ledger.broadcast(tx)
|
|
else:
|
|
await self.ledger.release_tx(tx)
|
|
|
|
return tx
|
|
|
|
def add_channel_private_key(self, private_key):
|
|
public_key_bytes = private_key.get_verifying_key().to_der()
|
|
channel_pubkey_hash = self.ledger.public_key_to_address(public_key_bytes)
|
|
self.channel_keys[channel_pubkey_hash] = private_key.to_pem().decode()
|
|
|
|
def get_channel_private_key(self, public_key_bytes):
|
|
channel_pubkey_hash = self.ledger.public_key_to_address(public_key_bytes)
|
|
private_key_pem = self.channel_keys.get(channel_pubkey_hash)
|
|
if private_key_pem:
|
|
return ecdsa.SigningKey.from_pem(private_key_pem, hashfunc=sha256)
|
|
|
|
async def maybe_migrate_certificates(self):
|
|
if not self.channel_keys:
|
|
return
|
|
channel_keys = {}
|
|
for private_key_pem in self.channel_keys.values():
|
|
if not isinstance(private_key_pem, str):
|
|
continue
|
|
if "-----BEGIN EC PRIVATE KEY-----" not in private_key_pem:
|
|
continue
|
|
private_key = ecdsa.SigningKey.from_pem(private_key_pem, hashfunc=sha256)
|
|
public_key_der = private_key.get_verifying_key().to_der()
|
|
channel_keys[self.ledger.public_key_to_address(public_key_der)] = private_key_pem
|
|
if self.channel_keys != channel_keys:
|
|
self.channel_keys = channel_keys
|
|
self.wallet.save()
|
|
|
|
async def save_max_gap(self):
|
|
if issubclass(self.address_generator, HierarchicalDeterministic):
|
|
gap = await self.get_max_gap()
|
|
gap_changed = False
|
|
new_receiving_gap = max(20, gap['max_receiving_gap'] + 1)
|
|
if self.receiving.gap != new_receiving_gap:
|
|
self.receiving.gap = new_receiving_gap
|
|
gap_changed = True
|
|
new_change_gap = max(6, gap['max_change_gap'] + 1)
|
|
if self.change.gap != new_change_gap:
|
|
self.change.gap = new_change_gap
|
|
gap_changed = True
|
|
if gap_changed:
|
|
self.wallet.save()
|
|
|
|
async def get_detailed_balance(self, confirmations=0, reserved_subtotals=False, read_only=False):
|
|
tips_balance, supports_balance, claims_balance = 0, 0, 0
|
|
get_total_balance = partial(self.get_balance, read_only=read_only, confirmations=confirmations,
|
|
include_claims=True)
|
|
total = await get_total_balance()
|
|
if reserved_subtotals:
|
|
claims_balance = await get_total_balance(txo_type__in=CLAIM_TYPES)
|
|
for amount, spent, from_me, to_me, height in await self.get_support_summary():
|
|
if confirmations > 0 and not 0 < height <= self.ledger.headers.height - (confirmations - 1):
|
|
continue
|
|
if not spent and to_me:
|
|
if from_me:
|
|
supports_balance += amount
|
|
else:
|
|
tips_balance += amount
|
|
reserved = claims_balance + supports_balance + tips_balance
|
|
else:
|
|
reserved = await self.get_balance(
|
|
confirmations=confirmations, include_claims=True, txo_type__gt=0
|
|
)
|
|
return {
|
|
'total': total,
|
|
'available': total - reserved,
|
|
'reserved': reserved,
|
|
'reserved_subtotals': {
|
|
'claims': claims_balance,
|
|
'supports': supports_balance,
|
|
'tips': tips_balance
|
|
} if reserved_subtotals else None
|
|
}
|
|
|
|
def get_transaction_history(self, read_only=False, **constraints):
|
|
return self.ledger.get_transaction_history(
|
|
read_only=read_only, wallet=self.wallet, accounts=[self], **constraints
|
|
)
|
|
|
|
def get_transaction_history_count(self, read_only=False, **constraints):
|
|
return self.ledger.get_transaction_history_count(
|
|
read_only=read_only, wallet=self.wallet, accounts=[self], **constraints
|
|
)
|
|
|
|
def get_claims(self, **constraints):
|
|
return self.ledger.get_claims(wallet=self.wallet, accounts=[self], **constraints)
|
|
|
|
def get_claim_count(self, **constraints):
|
|
return self.ledger.get_claim_count(wallet=self.wallet, accounts=[self], **constraints)
|
|
|
|
def get_streams(self, **constraints):
|
|
return self.ledger.get_streams(wallet=self.wallet, accounts=[self], **constraints)
|
|
|
|
def get_stream_count(self, **constraints):
|
|
return self.ledger.get_stream_count(wallet=self.wallet, accounts=[self], **constraints)
|
|
|
|
def get_channels(self, **constraints):
|
|
return self.ledger.get_channels(wallet=self.wallet, accounts=[self], **constraints)
|
|
|
|
def get_channel_count(self, **constraints):
|
|
return self.ledger.get_channel_count(wallet=self.wallet, accounts=[self], **constraints)
|
|
|
|
def get_collections(self, **constraints):
|
|
return self.ledger.get_collections(wallet=self.wallet, accounts=[self], **constraints)
|
|
|
|
def get_collection_count(self, **constraints):
|
|
return self.ledger.get_collection_count(wallet=self.wallet, accounts=[self], **constraints)
|
|
|
|
def get_supports(self, **constraints):
|
|
return self.ledger.get_supports(wallet=self.wallet, accounts=[self], **constraints)
|
|
|
|
def get_support_count(self, **constraints):
|
|
return self.ledger.get_support_count(wallet=self.wallet, accounts=[self], **constraints)
|
|
|
|
def get_support_summary(self):
|
|
return self.ledger.db.get_supports_summary(account_id=self.id)
|
|
|
|
async def release_all_outputs(self):
|
|
await self.ledger.db.release_all_outputs(self)
|