From 8d390c93fc58633d1bcd3b6514d92dd49559a508 Mon Sep 17 00:00:00 2001
From: Andrew Toth <andrewstoth@gmail.com>
Date: Sat, 21 Mar 2026 11:20:48 -0400
Subject: [PATCH] dbwrapper: make max_file_size a configurable DBParams field

Useful for fuzzing different values.
---
 src/dbwrapper.cpp | 2 +-
 src/dbwrapper.h   | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/dbwrapper.cpp b/src/dbwrapper.cpp
index eb222078b5e..ee6419d2041 100644
--- a/src/dbwrapper.cpp
+++ b/src/dbwrapper.cpp
@@ -149,7 +149,6 @@ static leveldb::Options GetOptions(size_t nCacheSize)
         // on corruption in later versions.
         options.paranoid_checks = true;
     }
-    options.max_file_size = std::max(options.max_file_size, DBWRAPPER_MAX_FILE_SIZE);
     SetMaxOpenFiles(&options);
     return options;
 }
@@ -224,6 +223,7 @@ CDBWrapper::CDBWrapper(const DBParams& params)
     DBContext().syncoptions.sync = true;
     DBContext().options = GetOptions(params.cache_bytes);
     DBContext().options.create_if_missing = true;
+    DBContext().options.max_file_size = params.max_file_size;
     if (params.memory_only) {
         DBContext().penv = leveldb::NewMemEnv(leveldb::Env::Default());
         DBContext().options.env = DBContext().penv;
diff --git a/src/dbwrapper.h b/src/dbwrapper.h
index 2eee6c1c023..c36864004fd 100644
--- a/src/dbwrapper.h
+++ b/src/dbwrapper.h
@@ -44,6 +44,9 @@ struct DBParams {
     bool obfuscate = false;
     //! Passed-through options.
     DBOptions options{};
+    //! Maximum LevelDB SST file size. Larger values reduce the frequency
+    //! of compactions but increase their duration.
+    size_t max_file_size = DBWRAPPER_MAX_FILE_SIZE;
 };
 
 class dbwrapper_error : public std::runtime_error