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automatic address history compaction

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fixes https://github.com/lbryio/scribe/issues/9
This commit is contained in:
Jack Robison 2022-04-04 19:28:59 -04:00
parent 4936bd43b6
commit 11c6e12bda
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1 changed files with 15 additions and 0 deletions
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15
scribe/blockchain/service.py
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@ -1327,6 +1327,21 @@ class BlockchainProcessorService(BlockchainService):
self.db.prefix_db.tx_count.stage_put(key_args=(height,), value_args=(tx_count,))
for hashX, new_history in self.hashXs_by_tx.items():
if height > self.env.reorg_limit: # compactify existing history
hist_txs = b''
# accumulate and delete all of the tx histories between height 1 and current - reorg_limit
for k, hist in self.db.prefix_db.hashX_history.iterate(
start=(hashX, 1), stop=(hashX, height - self.env.reorg_limit),
deserialize_key=False, deserialize_value=False):
hist_txs += hist
self.db.prefix_db.stage_raw_delete(k, hist)
if hist_txs:
# add the accumulated histories onto the existing compacted history at height 0
key = self.db.prefix_db.hashX_history.pack_key(hashX, 0)
existing = self.db.prefix_db.get(key)
if existing is not None:
self.db.prefix_db.stage_raw_delete(key, existing)
self.db.prefix_db.stage_raw_put(key, (existing or b'') + hist_txs)
if not new_history:
continue
self.db.prefix_db.hashX_history.stage_put(key_args=(hashX, height), value_args=(new_history,))