[wallet] Add HasUnusedKeys() helper

1 files changed, 3 insertions, 1 deletions

diff --git a/src/wallet/wallet.h b/src/wallet/wallet.h
index 0d2262cfe1..310300126d 100644
--- a/src/wallet/wallet.h
+++ b/src/wallet/wallet.h
@@ -813,7 +813,7 @@ public:
     const CWalletTx* GetWalletTx(const uint256& hash) const;
 
     //! check whether we are allowed to upgrade (or already support) to the named feature
-    bool CanSupportFeature(enum WalletFeature wf) { AssertLockHeld(cs_wallet); return nWalletMaxVersion >= wf; }
+    bool CanSupportFeature(enum WalletFeature wf) const { AssertLockHeld(cs_wallet); return nWalletMaxVersion >= wf; }
 
     /**
      * populate vCoins with vector of available COutputs.
@@ -978,6 +978,8 @@ public:
     bool GetKeyFromPool(CPubKey &key, bool internal = false);
     int64_t GetOldestKeyPoolTime();
     const std::map<CKeyID, int64_t>& GetAllReserveKeys() const { return m_pool_key_to_index; }
+    /** Does the wallet have at least min_keys in the keypool? */
+    bool HasUnusedKeys(int min_keys) const;
 
     std::set< std::set<CTxDestination> > GetAddressGroupings();
     std::map<CTxDestination, CAmount> GetAddressBalances();