From 172e3466125964713d171434f4ac0e81eb126707 Mon Sep 17 00:00:00 2001
From: selsta <selsta@sent.at>
Date: Sun, 18 Jan 2026 18:10:19 +0100
Subject: [PATCH] DaemonManager: use accurate blockchain size estimate

---
 main.qml                     | 2 +-
 src/daemon/DaemonManager.cpp | 7 +++----
 src/daemon/DaemonManager.h   | 2 +-
 3 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/main.qml b/main.qml
index 16fcff21..f856e419 100644
--- a/main.qml
+++ b/main.qml
@@ -1737,7 +1737,7 @@ ApplicationWindow {
         onRejected: console.log("data dir selection canceled")
         onAccepted: {
             var dataDir = walletManager.urlToLocalPath(blockchainFileDialog.fileUrl)
-            var validator = daemonManager.validateDataDir(dataDir);
+            var validator = daemonManager.validateDataDir(dataDir, estimatedBlockchainSize);
             if(validator.valid) {
                 persistentSettings.blockchainDataDir = dataDir;
             } else {
diff --git a/src/daemon/DaemonManager.cpp b/src/daemon/DaemonManager.cpp
index f1e4ddf9..60feebc7 100644
--- a/src/daemon/DaemonManager.cpp
+++ b/src/daemon/DaemonManager.cpp
@@ -297,7 +297,7 @@ void DaemonManager::exit()
     m_app_exit = true;
 }
 
-QVariantMap DaemonManager::validateDataDir(const QString &dataDir) const
+QVariantMap DaemonManager::validateDataDir(const QString &dataDir, const int estimatedBlockchainSize) const
 {
     QVariantMap result;
     bool valid = true;
@@ -312,9 +312,8 @@ QVariantMap DaemonManager::validateDataDir(const QString &dataDir) const
             valid = false;
         }
 
-        // Make sure there is 75GB storage available
         storageAvailable = storage.bytesAvailable()/1000/1000/1000;
-        if (storageAvailable < 75) {
+        if (storageAvailable < estimatedBlockchainSize) {
             valid = false;
         }
     } else {
@@ -339,7 +338,7 @@ bool DaemonManager::checkLmdbExists(QString datadir) {
     if (datadir.isEmpty() || datadir.isNull()) {
         datadir = QString::fromStdString(tools::get_default_data_dir());
     }
-    return validateDataDir(datadir).value("lmdbExists").value<bool>();
+    return QDir(datadir + "/lmdb").exists();
 }
 
 QString DaemonManager::getArgs(const QString &dataDir) {
diff --git a/src/daemon/DaemonManager.h b/src/daemon/DaemonManager.h
index 5945c697..3b5fc6e0 100644
--- a/src/daemon/DaemonManager.h
+++ b/src/daemon/DaemonManager.h
@@ -56,7 +56,7 @@ public:
     // Send daemon command from qml and prints output in console window.
     Q_INVOKABLE void sendCommandAsync(const QStringList &cmd, NetworkType::Type nettype, const QString &dataDir, const QJSValue& callback) const;
     Q_INVOKABLE void exit();
-    Q_INVOKABLE QVariantMap validateDataDir(const QString &dataDir) const;
+    Q_INVOKABLE QVariantMap validateDataDir(const QString &dataDir, const int estimatedBlockchainSizeGb) const;
     Q_INVOKABLE bool checkLmdbExists(QString datadir);
     Q_INVOKABLE QString getArgs(const QString &dataDir);