wallet/spkm: make GetOldestKeyPoolTime() const

The method checks the oldest key time for key pools and returns the oldest. It does no modifications.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/wallet/scriptpubkeyman.h b/src/wallet/scriptpubkeyman.h
index 9d227ad3bf..1a0d34a445 100644
--- a/src/wallet/scriptpubkeyman.h
+++ b/src/wallet/scriptpubkeyman.h
@@ -194,7 +194,7 @@ public:
     //! The action to do when the DB needs rewrite
     virtual void RewriteDB() {}
 
-    virtual int64_t GetOldestKeyPoolTime() { return GetTime(); }
+    virtual int64_t GetOldestKeyPoolTime() const { return GetTime(); }
 
     virtual size_t KeypoolCountExternalKeys() const { return 0; }
     virtual unsigned int GetKeyPoolSize() const { return 0; }
@@ -336,7 +336,7 @@ public:
 
     void RewriteDB() override;
 
-    int64_t GetOldestKeyPoolTime() override;
+    int64_t GetOldestKeyPoolTime() const override;
     size_t KeypoolCountExternalKeys() const override;
     unsigned int GetKeyPoolSize() const override;