import base64 import struct from typing import List, TYPE_CHECKING, Union from binascii import hexlify from itertools import chain from lbry.error import ResolveCensoredError from lbry.schema.types.v2.result_pb2 import Outputs as OutputsMessage from lbry.schema.types.v2.result_pb2 import Error as ErrorMessage if TYPE_CHECKING: from lbry.wallet.server.leveldb import ResolveResult INVALID = ErrorMessage.Code.Name(ErrorMessage.INVALID) NOT_FOUND = ErrorMessage.Code.Name(ErrorMessage.NOT_FOUND) BLOCKED = ErrorMessage.Code.Name(ErrorMessage.BLOCKED) def set_reference(reference, claim_hash, rows): if claim_hash: for txo in rows: if claim_hash == txo.claim_hash: reference.tx_hash = txo.tx_hash reference.nout = txo.position reference.height = txo.height return class Censor: NOT_CENSORED = 0 SEARCH = 1 RESOLVE = 2 __slots__ = 'censor_type', 'censored' def __init__(self, censor_type): self.censor_type = censor_type self.censored = {} def is_censored(self, row): return (row.get('censor_type') or self.NOT_CENSORED) >= self.censor_type def apply(self, rows): return [row for row in rows if not self.censor(row)] def censor(self, row) -> bool: if self.is_censored(row): censoring_channel_hash = row['censoring_channel_hash'] self.censored.setdefault(censoring_channel_hash, set()) self.censored[censoring_channel_hash].add(row['tx_hash']) return True return False def to_message(self, outputs: OutputsMessage, extra_txo_rows: dict): for censoring_channel_hash, count in self.censored.items(): blocked = outputs.blocked.add() blocked.count = len(count) set_reference(blocked.channel, extra_txo_rows.get(censoring_channel_hash)) outputs.blocked_total += len(count) class Outputs: __slots__ = 'txos', 'extra_txos', 'txs', 'offset', 'total', 'blocked', 'blocked_total' def __init__(self, txos: List, extra_txos: List, txs: set, offset: int, total: int, blocked: List, blocked_total: int): self.txos = txos self.txs = txs self.extra_txos = extra_txos self.offset = offset self.total = total self.blocked = blocked self.blocked_total = blocked_total def inflate(self, txs): tx_map = {tx.hash: tx for tx in txs} for txo_message in self.extra_txos: self.message_to_txo(txo_message, tx_map) txos = [self.message_to_txo(txo_message, tx_map) for txo_message in self.txos] return txos, self.inflate_blocked(tx_map) def inflate_blocked(self, tx_map): return { "total": self.blocked_total, "channels": [{ 'channel': self.message_to_txo(blocked.channel, tx_map), 'blocked': blocked.count } for blocked in self.blocked] } def message_to_txo(self, txo_message, tx_map): if txo_message.WhichOneof('meta') == 'error': error = { 'error': { 'name': txo_message.error.Code.Name(txo_message.error.code), 'text': txo_message.error.text, } } if error['error']['name'] == BLOCKED: error['error']['censor'] = self.message_to_txo( txo_message.error.blocked.channel, tx_map ) return error tx = tx_map.get(txo_message.tx_hash) if not tx: return txo = tx.outputs[txo_message.nout] if txo_message.WhichOneof('meta') == 'claim': claim = txo_message.claim txo.meta = { 'short_url': f'lbry://{claim.short_url}', 'canonical_url': f'lbry://{claim.canonical_url or claim.short_url}', 'reposted': claim.reposted, 'is_controlling': claim.is_controlling, 'take_over_height': claim.take_over_height, 'creation_height': claim.creation_height, 'activation_height': claim.activation_height, 'expiration_height': claim.expiration_height, 'effective_amount': claim.effective_amount, 'support_amount': claim.support_amount, 'trending_group': claim.trending_group, 'trending_mixed': claim.trending_mixed, 'trending_local': claim.trending_local, 'trending_global': claim.trending_global, } if claim.HasField('channel'): txo.channel = tx_map[claim.channel.tx_hash].outputs[claim.channel.nout] if claim.HasField('repost'): txo.reposted_claim = tx_map[claim.repost.tx_hash].outputs[claim.repost.nout] try: if txo.claim.is_channel: txo.meta['claims_in_channel'] = claim.claims_in_channel except: pass return txo @classmethod def from_base64(cls, data: str) -> 'Outputs': return cls.from_bytes(base64.b64decode(data)) @classmethod def from_bytes(cls, data: bytes) -> 'Outputs': outputs = OutputsMessage() outputs.ParseFromString(data) txs = set() for txo_message in chain(outputs.txos, outputs.extra_txos): if txo_message.WhichOneof('meta') == 'error': continue txs.add((hexlify(txo_message.tx_hash[::-1]).decode(), txo_message.height)) return cls( outputs.txos, outputs.extra_txos, txs, outputs.offset, outputs.total, outputs.blocked, outputs.blocked_total ) @classmethod def from_grpc(cls, outputs: OutputsMessage) -> 'Outputs': txs = set() for txo_message in chain(outputs.txos, outputs.extra_txos): if txo_message.WhichOneof('meta') == 'error': continue txs.add((hexlify(txo_message.tx_hash[::-1]).decode(), txo_message.height)) return cls( outputs.txos, outputs.extra_txos, txs, outputs.offset, outputs.total, outputs.blocked, outputs.blocked_total ) @classmethod def to_base64(cls, txo_rows, extra_txo_rows, offset=0, total=None, blocked=None) -> str: return base64.b64encode(cls.to_bytes(txo_rows, extra_txo_rows, offset, total, blocked)).decode() @classmethod def to_bytes(cls, txo_rows, extra_txo_rows, offset=0, total=None, blocked: Censor = None) -> bytes: page = OutputsMessage() page.offset = offset if total is not None: page.total = total # if blocked is not None: # blocked.to_message(page, extra_txo_rows) for row in extra_txo_rows: cls.encode_txo(page.extra_txos.add(), row) for row in txo_rows: # cls.row_to_message(row, page.txos.add(), extra_txo_rows) txo_message: 'OutputsMessage' = page.txos.add() cls.encode_txo(txo_message, row) if not isinstance(row, Exception): if row.channel_hash: set_reference(txo_message.claim.channel, row.channel_hash, extra_txo_rows) if row.reposted_claim_hash: set_reference(txo_message.claim.repost, row.reposted_claim_hash, extra_txo_rows) # set_reference(txo_message.error.blocked.channel, row.censor_hash, extra_txo_rows) return page.SerializeToString() @classmethod def encode_txo(cls, txo_message, resolve_result: Union['ResolveResult', Exception]): if isinstance(resolve_result, Exception): txo_message.error.text = resolve_result.args[0] if isinstance(resolve_result, ValueError): txo_message.error.code = ErrorMessage.INVALID elif isinstance(resolve_result, LookupError): txo_message.error.code = ErrorMessage.NOT_FOUND elif isinstance(resolve_result, ResolveCensoredError): txo_message.error.code = ErrorMessage.BLOCKED return txo_message.tx_hash = resolve_result.tx_hash txo_message.nout = resolve_result.position txo_message.height = resolve_result.height txo_message.claim.short_url = resolve_result.short_url txo_message.claim.reposted = 0 txo_message.claim.is_controlling = resolve_result.is_controlling txo_message.claim.creation_height = resolve_result.creation_height txo_message.claim.activation_height = resolve_result.activation_height txo_message.claim.expiration_height = resolve_result.expiration_height txo_message.claim.effective_amount = resolve_result.effective_amount txo_message.claim.support_amount = resolve_result.support_amount if resolve_result.canonical_url is not None: txo_message.claim.canonical_url = resolve_result.canonical_url if resolve_result.last_takeover_height is not None: txo_message.claim.take_over_height = resolve_result.last_takeover_height if resolve_result.claims_in_channel is not None: txo_message.claim.claims_in_channel = resolve_result.claims_in_channel