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

1 files changed, 5 insertions, 2 deletions

diff --git a/src/rpc/blockchain.cpp b/src/rpc/blockchain.cpp
index 37a28e414a..51d0879b12 100644
--- a/src/rpc/blockchain.cpp
+++ b/src/rpc/blockchain.cpp
@@ -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));