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fuzz: improve utxo_snapshot target

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Add the possibility of giving more guidance to the creation of the
metadata and/or coins, so that the fuzzer gets the chance
to reach more error conditions in ActivateSnapshot and sometimes
successfully creates a valid snapshot.

This also changes the asserts for the success case that were outdated,
and only didn't result in a crash because the fuzzer wasn't able
to reach this code before.
This commit is contained in:
Martin Zumsande
2024-06-21 15:24:21 -04:00
parent 173ab0ccf2
commit de71d4dece
3 changed files with 47 additions and 10 deletions
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2
test/functional/feature_assumeutxo.py
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@ -117,7 +117,7 @@ class AssumeutxoTest(BitcoinTestFramework):
with open(bad_snapshot_path, 'wb') as f:
f.write(valid_snapshot_contents[:11] + bogus_height.to_bytes(4, "little") + bytes.fromhex(bad_block_hash)[::-1] + valid_snapshot_contents[47:])
msg = f"Unable to load UTXO snapshot: assumeutxo block hash in snapshot metadata not recognized (hash: {bad_block_hash}, height: {bogus_height}). The following snapshot heights are available: 110, 299."
msg = f"Unable to load UTXO snapshot: assumeutxo block hash in snapshot metadata not recognized (hash: {bad_block_hash}, height: {bogus_height}). The following snapshot heights are available: 110, 200, 299."
assert_raises_rpc_error(-32603, msg, node.loadtxoutset, bad_snapshot_path)
self.log.info(" - snapshot file with wrong number of coins")