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Merge bitcoin/bitcoin#30636: test: assumeutxo: check that UTXO-querying RPCs operate on snapshot chainstate
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917e70a620 test: assumeutxo: check that UTXO-querying RPCs operate on snapshot chainstate (Sebastian Falbesoner)

Pull request description:

  Inspired by some manual testing I did for #28553, this PR checks that RPCs which explicitly query the UTXO set database (i.e. `gettxoutsetinfo`, `scantxoutset` and `gettxout`) operate on the snapshot chainstate as expected.

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Tree-SHA512: 40ecd1c5dd879234df1667fa5444a1fbbee9b7c456f597dc982d1a2bce46fe9107711b005ab829e570ef919a4914792f72f342d71d92bad2ae9434b5e68d5bd3
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Ava Chow 2024-08-21 13:30:00 -04:00
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test/functional/feature_assumeutxo.py
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@ -350,6 +350,31 @@ class AssumeutxoTest(BitcoinTestFramework):
assert_equal(loaded['coins_loaded'], SNAPSHOT_BASE_HEIGHT) assert_equal(loaded['coins_loaded'], SNAPSHOT_BASE_HEIGHT)
assert_equal(loaded['base_height'], SNAPSHOT_BASE_HEIGHT) assert_equal(loaded['base_height'], SNAPSHOT_BASE_HEIGHT)
self.log.info("Check that UTXO-querying RPCs operate on snapshot chainstate")
snapshot_hash = loaded['tip_hash']
snapshot_num_coins = loaded['coins_loaded']
# coinstatsindex might be not caught up yet and is not relevant for this test, so don't use it
utxo_info = n1.gettxoutsetinfo(use_index=False)
assert_equal(utxo_info['txouts'], snapshot_num_coins)
assert_equal(utxo_info['height'], SNAPSHOT_BASE_HEIGHT)
assert_equal(utxo_info['bestblock'], snapshot_hash)
# find coinbase output at snapshot height on node0 and scan for it on node1,
# where the block is not available, but the snapshot was loaded successfully
coinbase_tx = n0.getblock(snapshot_hash, verbosity=2)['tx'][0]
assert_raises_rpc_error(-1, "Block not found on disk", n1.getblock, snapshot_hash)
coinbase_output_descriptor = coinbase_tx['vout'][0]['scriptPubKey']['desc']
scan_result = n1.scantxoutset('start', [coinbase_output_descriptor])
assert_equal(scan_result['success'], True)
assert_equal(scan_result['txouts'], snapshot_num_coins)
assert_equal(scan_result['height'], SNAPSHOT_BASE_HEIGHT)
assert_equal(scan_result['bestblock'], snapshot_hash)
scan_utxos = [(coin['txid'], coin['vout']) for coin in scan_result['unspents']]
assert (coinbase_tx['txid'], 0) in scan_utxos
txout_result = n1.gettxout(coinbase_tx['txid'], 0)
assert_equal(txout_result['scriptPubKey']['desc'], coinbase_output_descriptor)
def check_tx_counts(final: bool) -> None: def check_tx_counts(final: bool) -> None:
"""Check nTx and nChainTx intermediate values right after loading """Check nTx and nChainTx intermediate values right after loading
the snapshot, and final values after the snapshot is validated.""" the snapshot, and final values after the snapshot is validated."""