forked from LBRYCommunity/lbry-sdk
creates a Resolve class for moving resolve methods out of ledger
This commit is contained in:
Victor Shyba
Jack Robison
parent
9e89b3e40e
commit
e0230864ce
2 changed files with 266 additions and 253 deletions
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@ -6,11 +6,8 @@ from binascii import unhexlify
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from twisted.internet import defer
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from lbrynet.core.Error import UnknownNameError, UnknownClaimID, UnknownURI
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from .resolve import format_amount_value, _get_permanent_url, validate_claim_signature_and_get_channel_name
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from .resolve import _verify_proof, _handle_claim_result
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from lbryschema.decode import smart_decode
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from lbryschema.error import URIParseError, DecodeError
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from .resolve import Resolver
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from lbryschema.error import URIParseError
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from lbryschema.uri import parse_lbry_uri
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from torba.baseledger import BaseLedger
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from torba.baseheader import BaseHeaders, _ArithUint256
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@ -153,252 +150,9 @@ class MainNetLedger(BaseLedger):
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except URIParseError as err:
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defer.returnValue({'error': err.message})
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resolutions = yield self.network.get_values_for_uris(self.headers.hash(), *uris)
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defer.returnValue(self._handle_resolutions(resolutions, uris, page, page_size))
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def _handle_resolutions(self, resolutions, requested_uris, page, page_size):
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results = {}
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for uri in requested_uris:
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resolution = (resolutions or {}).get(uri, {})
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if resolution:
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try:
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results[uri] = _handle_claim_result(
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self._handle_resolve_uri_response(uri, resolution, page, page_size)
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)
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except (UnknownNameError, UnknownClaimID, UnknownURI) as err:
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results[uri] = {'error': err.message}
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return results
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def _handle_resolve_uri_response(self, uri, resolution, page=0, page_size=10, raw=False):
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result = {}
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claim_trie_root = self.headers.claim_trie_root
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parsed_uri = parse_lbry_uri(uri)
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# parse an included certificate
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if 'certificate' in resolution:
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certificate_response = resolution['certificate']['result']
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certificate_resolution_type = resolution['certificate']['resolution_type']
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if certificate_resolution_type == "winning" and certificate_response:
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if 'height' in certificate_response:
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height = certificate_response['height']
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depth = self.headers.height - height
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certificate_result = _verify_proof(self, parsed_uri.name,
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claim_trie_root,
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certificate_response,
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height, depth,
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transaction_class=self.transaction_class)
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result['certificate'] = self.parse_and_validate_claim_result(certificate_result,
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raw=raw)
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elif certificate_resolution_type == "claim_id":
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result['certificate'] = self.parse_and_validate_claim_result(certificate_response,
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raw=raw)
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elif certificate_resolution_type == "sequence":
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result['certificate'] = self.parse_and_validate_claim_result(certificate_response,
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raw=raw)
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else:
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log.error("unknown response type: %s", certificate_resolution_type)
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if 'certificate' in result:
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certificate = result['certificate']
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if 'unverified_claims_in_channel' in resolution:
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max_results = len(resolution['unverified_claims_in_channel'])
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result['claims_in_channel'] = max_results
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else:
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result['claims_in_channel'] = 0
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else:
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result['error'] = "claim not found"
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result['success'] = False
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result['uri'] = str(parsed_uri)
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else:
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certificate = None
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# if this was a resolution for a name, parse the result
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if 'claim' in resolution:
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claim_response = resolution['claim']['result']
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claim_resolution_type = resolution['claim']['resolution_type']
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if claim_resolution_type == "winning" and claim_response:
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if 'height' in claim_response:
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height = claim_response['height']
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depth = self.headers.height - height
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claim_result = _verify_proof(self, parsed_uri.name,
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claim_trie_root,
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claim_response,
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height, depth)
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result['claim'] = self.parse_and_validate_claim_result(claim_result,
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certificate,
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raw)
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elif claim_resolution_type == "claim_id":
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result['claim'] = self.parse_and_validate_claim_result(claim_response,
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certificate,
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raw)
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elif claim_resolution_type == "sequence":
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result['claim'] = self.parse_and_validate_claim_result(claim_response,
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certificate,
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raw)
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else:
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log.error("unknown response type: %s", claim_resolution_type)
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# if this was a resolution for a name in a channel make sure there is only one valid
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# match
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elif 'unverified_claims_for_name' in resolution and 'certificate' in result:
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unverified_claims_for_name = resolution['unverified_claims_for_name']
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channel_info = self.get_channel_claims_page(unverified_claims_for_name,
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result['certificate'], page=1)
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claims_in_channel, upper_bound = channel_info
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if len(claims_in_channel) > 1:
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log.error("Multiple signed claims for the same name")
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elif not claims_in_channel:
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log.error("No valid claims for this name for this channel")
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else:
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result['claim'] = claims_in_channel[0]
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# parse and validate claims in a channel iteratively into pages of results
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elif 'unverified_claims_in_channel' in resolution and 'certificate' in result:
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ids_to_check = resolution['unverified_claims_in_channel']
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channel_info = self.get_channel_claims_page(ids_to_check, result['certificate'],
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page=page, page_size=page_size)
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claims_in_channel, upper_bound = channel_info
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if claims_in_channel:
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result['claims_in_channel'] = claims_in_channel
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elif 'error' not in result:
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result['error'] = "claim not found"
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result['success'] = False
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result['uri'] = str(parsed_uri)
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return result
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def parse_and_validate_claim_result(self, claim_result, certificate=None, raw=False):
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if not claim_result or 'value' not in claim_result:
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return claim_result
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claim_result['decoded_claim'] = False
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decoded = None
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if not raw:
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claim_value = claim_result['value']
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try:
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decoded = smart_decode(claim_value)
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claim_result['value'] = decoded.claim_dict
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claim_result['decoded_claim'] = True
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except DecodeError:
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pass
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if decoded:
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claim_result['has_signature'] = False
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if decoded.has_signature:
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if certificate is None:
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log.info("fetching certificate to check claim signature")
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certificate = self.getclaimbyid(decoded.certificate_id)
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if not certificate:
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log.warning('Certificate %s not found', decoded.certificate_id)
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claim_result['has_signature'] = True
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claim_result['signature_is_valid'] = False
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validated, channel_name = validate_claim_signature_and_get_channel_name(
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decoded, certificate, claim_result['address'])
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claim_result['channel_name'] = channel_name
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if validated:
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claim_result['signature_is_valid'] = True
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if 'height' in claim_result and claim_result['height'] is None:
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claim_result['height'] = -1
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if 'amount' in claim_result and not isinstance(claim_result['amount'], float):
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claim_result = format_amount_value(claim_result)
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claim_result['permanent_url'] = _get_permanent_url(claim_result)
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return claim_result
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@staticmethod
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def prepare_claim_queries(start_position, query_size, channel_claim_infos):
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queries = [tuple()]
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names = {}
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# a table of index counts for the sorted claim ids, including ignored claims
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absolute_position_index = {}
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block_sorted_infos = sorted(channel_claim_infos.iteritems(), key=lambda x: int(x[1][1]))
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per_block_infos = {}
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for claim_id, (name, height) in block_sorted_infos:
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claims = per_block_infos.get(height, [])
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claims.append((claim_id, name))
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per_block_infos[height] = sorted(claims, key=lambda x: int(x[0], 16))
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abs_position = 0
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for height in sorted(per_block_infos.keys(), reverse=True):
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for claim_id, name in per_block_infos[height]:
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names[claim_id] = name
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absolute_position_index[claim_id] = abs_position
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if abs_position >= start_position:
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if len(queries[-1]) >= query_size:
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queries.append(tuple())
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queries[-1] += (claim_id,)
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abs_position += 1
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return queries, names, absolute_position_index
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def iter_channel_claims_pages(self, queries, claim_positions, claim_names, certificate,
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page_size=10):
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# lbryum server returns a dict of {claim_id: (name, claim_height)}
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# first, sort the claims by block height (and by claim id int value within a block).
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# map the sorted claims into getclaimsbyids queries of query_size claim ids each
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# send the batched queries to lbryum server and iteratively validate and parse
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# the results, yield a page of results at a time.
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# these results can include those where `signature_is_valid` is False. if they are skipped,
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# page indexing becomes tricky, as the number of results isn't known until after having
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# processed them.
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# TODO: fix ^ in lbryschema
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def iter_validate_channel_claims():
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for claim_ids in queries:
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log.info(claim_ids)
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batch_result = yield self.network.get_claims_by_ids(*claim_ids)
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for claim_id in claim_ids:
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claim = batch_result[claim_id]
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if claim['name'] == claim_names[claim_id]:
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formatted_claim = self.parse_and_validate_claim_result(claim, certificate)
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formatted_claim['absolute_channel_position'] = claim_positions[
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claim['claim_id']]
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yield formatted_claim
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else:
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log.warning("ignoring claim with name mismatch %s %s", claim['name'],
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claim['claim_id'])
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yielded_page = False
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results = []
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for claim in iter_validate_channel_claims():
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results.append(claim)
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# if there is a full page of results, yield it
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if len(results) and len(results) % page_size == 0:
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yield results[-page_size:]
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yielded_page = True
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# if we didn't get a full page of results, yield what results we did get
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if not yielded_page:
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yield results
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def get_channel_claims_page(self, channel_claim_infos, certificate, page, page_size=10):
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page = page or 0
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page_size = max(page_size, 1)
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if page_size > 500:
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raise Exception("page size above maximum allowed")
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start_position = (page - 1) * page_size
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queries, names, claim_positions = self.prepare_claim_queries(start_position, page_size,
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channel_claim_infos)
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page_generator = self.iter_channel_claims_pages(queries, claim_positions, names,
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certificate, page_size=page_size)
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upper_bound = len(claim_positions)
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if not page:
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return None, upper_bound
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if start_position > upper_bound:
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raise IndexError("claim %i greater than max %i" % (start_position, upper_bound))
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return next(page_generator), upper_bound
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resolver = Resolver(self.headers.claim_trie_root, self.headers.height, self.transaction_class,
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hash160_to_address=lambda x: self.hash160_to_address(x), network=self.network)
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defer.returnValue(resolver._handle_resolutions(resolutions, uris, page, page_size))
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@defer.inlineCallbacks
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def start(self):
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@ -8,11 +8,270 @@ from lbryschema.address import is_address
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from lbryschema.claim import ClaimDict
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from lbryschema.decode import smart_decode
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from lbryschema.error import DecodeError
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from lbryschema.uri import parse_lbry_uri
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from .claim_proofs import verify_proof, InvalidProofError
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log = logging.getLogger(__name__)
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class Resolver:
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def __init__(self, claim_trie_root, height, transaction_class, hash160_to_address, network):
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self.claim_trie_root = claim_trie_root
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self.height = height
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self.transaction_class = transaction_class
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self.hash160_to_address = hash160_to_address
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self.network = network
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def _handle_resolutions(self, resolutions, requested_uris, page, page_size):
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results = {}
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for uri in requested_uris:
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resolution = (resolutions or {}).get(uri, {})
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if resolution:
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try:
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results[uri] = _handle_claim_result(
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self._handle_resolve_uri_response(uri, resolution, page, page_size)
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)
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except (UnknownNameError, UnknownClaimID, UnknownURI) as err:
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results[uri] = {'error': err.message}
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return results
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def _handle_resolve_uri_response(self, uri, resolution, page=0, page_size=10, raw=False):
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result = {}
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claim_trie_root = self.claim_trie_root
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parsed_uri = parse_lbry_uri(uri)
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certificate = None
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# parse an included certificate
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if 'certificate' in resolution:
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certificate_response = resolution['certificate']['result']
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certificate_resolution_type = resolution['certificate']['resolution_type']
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if certificate_resolution_type == "winning" and certificate_response:
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if 'height' in certificate_response:
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height = certificate_response['height']
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depth = self.height - height
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certificate_result = _verify_proof(parsed_uri.name,
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claim_trie_root,
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certificate_response,
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height, depth,
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transaction_class=self.transaction_class,
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hash160_to_address=self.hash160_to_address)
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result['certificate'] = self.parse_and_validate_claim_result(certificate_result,
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raw=raw)
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elif certificate_resolution_type == "claim_id":
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result['certificate'] = self.parse_and_validate_claim_result(certificate_response,
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raw=raw)
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elif certificate_resolution_type == "sequence":
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result['certificate'] = self.parse_and_validate_claim_result(certificate_response,
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raw=raw)
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else:
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log.error("unknown response type: %s", certificate_resolution_type)
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if 'certificate' in result:
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certificate = result['certificate']
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if 'unverified_claims_in_channel' in resolution:
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max_results = len(resolution['unverified_claims_in_channel'])
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result['claims_in_channel'] = max_results
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else:
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result['claims_in_channel'] = 0
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else:
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result['error'] = "claim not found"
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result['success'] = False
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result['uri'] = str(parsed_uri)
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else:
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certificate = None
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# if this was a resolution for a name, parse the result
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if 'claim' in resolution:
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claim_response = resolution['claim']['result']
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claim_resolution_type = resolution['claim']['resolution_type']
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if claim_resolution_type == "winning" and claim_response:
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if 'height' in claim_response:
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height = claim_response['height']
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depth = self.height - height
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claim_result = _verify_proof(parsed_uri.name,
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claim_trie_root,
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claim_response,
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height, depth,
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transaction_class=self.transaction_class,
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hash160_to_address=self.hash160_to_address)
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result['claim'] = self.parse_and_validate_claim_result(claim_result,
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certificate,
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raw)
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elif claim_resolution_type == "claim_id":
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result['claim'] = self.parse_and_validate_claim_result(claim_response,
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certificate,
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raw)
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elif claim_resolution_type == "sequence":
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result['claim'] = self.parse_and_validate_claim_result(claim_response,
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certificate,
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raw)
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else:
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log.error("unknown response type: %s", claim_resolution_type)
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# if this was a resolution for a name in a channel make sure there is only one valid
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# match
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elif 'unverified_claims_for_name' in resolution and 'certificate' in result:
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unverified_claims_for_name = resolution['unverified_claims_for_name']
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channel_info = self.get_channel_claims_page(unverified_claims_for_name,
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result['certificate'], page=1)
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claims_in_channel, upper_bound = channel_info
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if len(claims_in_channel) > 1:
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log.error("Multiple signed claims for the same name")
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elif not claims_in_channel:
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log.error("No valid claims for this name for this channel")
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else:
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result['claim'] = claims_in_channel[0]
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# parse and validate claims in a channel iteratively into pages of results
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elif 'unverified_claims_in_channel' in resolution and 'certificate' in result:
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ids_to_check = resolution['unverified_claims_in_channel']
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channel_info = self.get_channel_claims_page(ids_to_check, result['certificate'],
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page=page, page_size=page_size)
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claims_in_channel, upper_bound = channel_info
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if claims_in_channel:
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result['claims_in_channel'] = claims_in_channel
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elif 'error' not in result:
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result['error'] = "claim not found"
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result['success'] = False
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result['uri'] = str(parsed_uri)
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return result
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def parse_and_validate_claim_result(self, claim_result, certificate=None, raw=False):
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if not claim_result or 'value' not in claim_result:
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return claim_result
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claim_result['decoded_claim'] = False
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decoded = None
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if not raw:
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claim_value = claim_result['value']
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try:
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decoded = smart_decode(claim_value)
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claim_result['value'] = decoded.claim_dict
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claim_result['decoded_claim'] = True
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except DecodeError:
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pass
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if decoded:
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claim_result['has_signature'] = False
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if decoded.has_signature:
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if certificate is None:
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log.info("fetching certificate to check claim signature")
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certificate = self.network.get_claims_by_ids(decoded.certificate_id)
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if not certificate:
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log.warning('Certificate %s not found', decoded.certificate_id)
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claim_result['has_signature'] = True
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claim_result['signature_is_valid'] = False
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validated, channel_name = validate_claim_signature_and_get_channel_name(
|
||||
decoded, certificate, claim_result['address'])
|
||||
claim_result['channel_name'] = channel_name
|
||||
if validated:
|
||||
claim_result['signature_is_valid'] = True
|
||||
|
||||
if 'height' in claim_result and claim_result['height'] is None:
|
||||
claim_result['height'] = -1
|
||||
|
||||
if 'amount' in claim_result and not isinstance(claim_result['amount'], float):
|
||||
claim_result = format_amount_value(claim_result)
|
||||
|
||||
claim_result['permanent_url'] = _get_permanent_url(claim_result)
|
||||
|
||||
return claim_result
|
||||
|
||||
@staticmethod
|
||||
def prepare_claim_queries(start_position, query_size, channel_claim_infos):
|
||||
queries = [tuple()]
|
||||
names = {}
|
||||
# a table of index counts for the sorted claim ids, including ignored claims
|
||||
absolute_position_index = {}
|
||||
|
||||
block_sorted_infos = sorted(channel_claim_infos.iteritems(), key=lambda x: int(x[1][1]))
|
||||
per_block_infos = {}
|
||||
for claim_id, (name, height) in block_sorted_infos:
|
||||
claims = per_block_infos.get(height, [])
|
||||
claims.append((claim_id, name))
|
||||
per_block_infos[height] = sorted(claims, key=lambda x: int(x[0], 16))
|
||||
|
||||
abs_position = 0
|
||||
|
||||
for height in sorted(per_block_infos.keys(), reverse=True):
|
||||
for claim_id, name in per_block_infos[height]:
|
||||
names[claim_id] = name
|
||||
absolute_position_index[claim_id] = abs_position
|
||||
if abs_position >= start_position:
|
||||
if len(queries[-1]) >= query_size:
|
||||
queries.append(tuple())
|
||||
queries[-1] += (claim_id,)
|
||||
abs_position += 1
|
||||
return queries, names, absolute_position_index
|
||||
|
||||
def iter_channel_claims_pages(self, queries, claim_positions, claim_names, certificate,
|
||||
page_size=10):
|
||||
# lbryum server returns a dict of {claim_id: (name, claim_height)}
|
||||
# first, sort the claims by block height (and by claim id int value within a block).
|
||||
|
||||
# map the sorted claims into getclaimsbyids queries of query_size claim ids each
|
||||
|
||||
# send the batched queries to lbryum server and iteratively validate and parse
|
||||
# the results, yield a page of results at a time.
|
||||
|
||||
# these results can include those where `signature_is_valid` is False. if they are skipped,
|
||||
# page indexing becomes tricky, as the number of results isn't known until after having
|
||||
# processed them.
|
||||
# TODO: fix ^ in lbryschema
|
||||
|
||||
def iter_validate_channel_claims():
|
||||
for claim_ids in queries:
|
||||
log.info(claim_ids)
|
||||
batch_result = yield self.network.get_claims_by_ids(*claim_ids)
|
||||
for claim_id in claim_ids:
|
||||
claim = batch_result[claim_id]
|
||||
if claim['name'] == claim_names[claim_id]:
|
||||
formatted_claim = self.parse_and_validate_claim_result(claim, certificate)
|
||||
formatted_claim['absolute_channel_position'] = claim_positions[
|
||||
claim['claim_id']]
|
||||
yield formatted_claim
|
||||
else:
|
||||
log.warning("ignoring claim with name mismatch %s %s", claim['name'],
|
||||
claim['claim_id'])
|
||||
|
||||
yielded_page = False
|
||||
results = []
|
||||
for claim in iter_validate_channel_claims():
|
||||
results.append(claim)
|
||||
|
||||
# if there is a full page of results, yield it
|
||||
if len(results) and len(results) % page_size == 0:
|
||||
yield results[-page_size:]
|
||||
yielded_page = True
|
||||
|
||||
# if we didn't get a full page of results, yield what results we did get
|
||||
if not yielded_page:
|
||||
yield results
|
||||
|
||||
def get_channel_claims_page(self, channel_claim_infos, certificate, page, page_size=10):
|
||||
page = page or 0
|
||||
page_size = max(page_size, 1)
|
||||
if page_size > 500:
|
||||
raise Exception("page size above maximum allowed")
|
||||
start_position = (page - 1) * page_size
|
||||
queries, names, claim_positions = self.prepare_claim_queries(start_position, page_size,
|
||||
channel_claim_infos)
|
||||
page_generator = self.iter_channel_claims_pages(queries, claim_positions, names,
|
||||
certificate, page_size=page_size)
|
||||
upper_bound = len(claim_positions)
|
||||
if not page:
|
||||
return None, upper_bound
|
||||
if start_position > upper_bound:
|
||||
raise IndexError("claim %i greater than max %i" % (start_position, upper_bound))
|
||||
return next(page_generator), upper_bound
|
||||
|
||||
|
||||
# Format amount to be decimal encoded string
|
||||
# Format value to be hex encoded string
|
||||
# TODO: refactor. Came from lbryum, there could be another part of torba doing it
|
||||
|
|
@ -47,7 +306,7 @@ def _get_permanent_url(claim_result):
|
|||
)
|
||||
|
||||
|
||||
def _verify_proof(ledger, name, claim_trie_root, result, height, depth, transaction_class):
|
||||
def _verify_proof(name, claim_trie_root, result, height, depth, transaction_class, hash160_to_address):
|
||||
"""
|
||||
Verify proof for name claim
|
||||
"""
|
||||
|
|
@ -81,7 +340,7 @@ def _verify_proof(ledger, name, claim_trie_root, result, height, depth, transact
|
|||
if 0 <= nOut < len(tx.outputs):
|
||||
claim_output = tx.outputs[nOut]
|
||||
effective_amount = claim_output.amount + support_amount
|
||||
claim_address = ledger.hash160_to_address(claim_output.script.values['pubkey_hash'])
|
||||
claim_address = hash160_to_address(claim_output.script.values['pubkey_hash'])
|
||||
claim_id = result['claim_id']
|
||||
claim_sequence = result['claim_sequence']
|
||||
claim_script = claim_output.script
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue