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51 lines
1.9 KiB
Python
51 lines
1.9 KiB
Python
# Copyright BigchainDB GmbH and BigchainDB contributors
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# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
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# Code is Apache-2.0 and docs are CC-BY-4.0
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from bigchaindb.utils import condition_details_has_owner
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from bigchaindb.backend import query
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from bigchaindb.common.transaction import TransactionLink
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from itertools import chain
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class FastQuery():
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"""Database queries that join on block results from a single node."""
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def __init__(self, connection):
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self.connection = connection
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def get_outputs_by_public_key(self, public_key):
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"""Get outputs for a public key"""
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txs = list(query.get_owned_ids(self.connection, public_key))
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return [TransactionLink(tx['id'], index)
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for tx in txs
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for index, output in enumerate(tx['outputs'])
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if condition_details_has_owner(output['condition']['details'],
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public_key)]
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def filter_spent_outputs(self, outputs):
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"""Remove outputs that have been spent
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Args:
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outputs: list of TransactionLink
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"""
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links = list(chain.from_iterable([o.to_query() for o in outputs]))
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txs = list(query.get_spending_transactions(self.connection, links))
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spends = {TransactionLink.from_dict(input_['fulfills'])
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for tx in txs
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for input_ in tx['inputs']}
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return [ff for ff in outputs if ff not in spends]
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def filter_unspent_outputs(self, outputs):
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"""Remove outputs that have not been spent
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Args:
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outputs: list of TransactionLink
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"""
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links = list(chain.from_iterable([o.to_query() for o in outputs]))
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txs = list(query.get_spending_transactions(self.connection, links))
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spends = {TransactionLink.from_dict(input_['fulfills'])
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for tx in txs
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for input_ in tx['inputs']}
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return [ff for ff in outputs if ff in spends]
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