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assumeutxo: fail early if snapshot block hash doesn't match AssumeUTXO parameters

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This commit is contained in:
Sebastian Falbesoner 2023-10-15 16:34:15 +02:00
parent 78b7e95518
commit 9620cb4493
2 changed files with 8 additions and 10 deletions
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7
src/rpc/blockchain.cpp
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@ -2737,6 +2737,7 @@ static RPCHelpMan loadtxoutset()
[&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
{
NodeContext& node = EnsureAnyNodeContext(request.context);
ChainstateManager& chainman = EnsureChainman(node);
fs::path path{AbsPathForConfigVal(EnsureArgsman(node), fs::u8path(request.params[0].get_str()))};
FILE* file{fsbridge::fopen(path, "rb")};
@ -2751,14 +2752,16 @@ static RPCHelpMan loadtxoutset()
afile >> metadata;
uint256 base_blockhash = metadata.m_base_blockhash;
if (!chainman.GetParams().AssumeutxoForBlockhash(base_blockhash).has_value()) {
throw JSONRPCError(RPC_INTERNAL_ERROR, strprintf("Unable to load UTXO snapshot, "
"assumeutxo block hash in snapshot metadata not recognized (%s)", base_blockhash.ToString()));
}
int max_secs_to_wait_for_headers = 60 * 10;
CBlockIndex* snapshot_start_block = nullptr;
LogPrintf("[snapshot] waiting to see blockheader %s in headers chain before snapshot activation\n",
base_blockhash.ToString());
ChainstateManager& chainman = EnsureChainman(node);
while (max_secs_to_wait_for_headers > 0) {
snapshot_start_block = WITH_LOCK(::cs_main,
return chainman.m_blockman.LookupBlockIndex(base_blockhash));

11
test/functional/feature_assumeutxo.py
View file

@ -73,17 +73,12 @@ class AssumeutxoTest(BitcoinTestFramework):
bad_snapshot_path = valid_snapshot_path + '.mod'
self.log.info(" - snapshot file refering to a block that is not in the assumeutxo parameters")
# we can only test this with a block that is already known, as otherwise the `loadtxoutset` RPC
# would time out (waiting to see the hash in the headers chain), rather than error immediately
bad_snapshot_height = SNAPSHOT_BASE_HEIGHT - 1
bad_snapshot_block_hash = self.nodes[0].getblockhash(SNAPSHOT_BASE_HEIGHT - 1)
with open(bad_snapshot_path, 'wb') as f:
bad_snapshot_block_hash = self.nodes[0].getblockhash(bad_snapshot_height)
# block hash of the snapshot base is stored right at the start (first 32 bytes)
f.write(bytes.fromhex(bad_snapshot_block_hash)[::-1] + valid_snapshot_contents[32:])
expected_log = f"assumeutxo height in snapshot metadata not recognized ({bad_snapshot_height}) - refusing to load snapshot"
with self.nodes[1].assert_debug_log([expected_log]):
assert_raises_rpc_error(-32603, "Unable to load UTXO snapshot", self.nodes[1].loadtxoutset, bad_snapshot_path)
error_details = f"assumeutxo block hash in snapshot metadata not recognized ({bad_snapshot_block_hash})"
assert_raises_rpc_error(-32603, f"Unable to load UTXO snapshot, {error_details}", self.nodes[1].loadtxoutset, bad_snapshot_path)
self.log.info(" - snapshot file with wrong number of coins")
valid_num_coins = struct.unpack("<I", valid_snapshot_contents[32:32 + 4])[0]