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tentatively refactor prefetch

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Victor Shyba 2018-10-11 02:54:02 -03:00 committed by Lex Berezhny
parent 44b1178cfe
commit 0ce4b9a7de
1 changed files with 13 additions and 10 deletions
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23
torba/baseledger.py
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@ -349,17 +349,20 @@ class BaseLedger(metaclass=LedgerRegistry):
@defer.inlineCallbacks
def _prefetch_history(self, remote_history, local_history):
proofs = {
entry['tx_hash']: (
self.network.get_merkle(entry['tx_hash'], entry['height']) if entry['height'] > 0 else None
proofs, network_txs, deferreds = {}, {}, []
for i, (hex_id, remote_height) in enumerate(map(itemgetter('tx_hash', 'height'), remote_history)):
if i < len(local_history) and local_history[i] == (hex_id, remote_height):
continue
if remote_height > 0:
deferreds.append(
self.network.get_merkle(hex_id, remote_height).addBoth(
lambda result, txid: proofs.__setitem__(txid, result), hex_id)
)
deferreds.append(
self.network.get_transaction(hex_id).addBoth(
lambda result, txid: network_txs.__setitem__(txid, result), hex_id)
)
for index, entry in enumerate(remote_history)
if index >= len(local_history) or (entry['tx_hash'], entry['height']) != local_history[index]
}
network_txs = {key: self.network.get_transaction(key) for key in proofs.keys()}
yield defer.DeferredList(list(filter(None, proofs.values())) + list(network_txs.values()))
proofs = {key: value.result for key, value in proofs.items() if value}
network_txs = {key: value.result for key, value in network_txs.items()}
yield defer.DeferredList(deferreds)
return proofs, network_txs
@defer.inlineCallbacks