wallet: Add utility method for CanSupportFeature

Author: achow101

src/wallet/wallet.h

@@ -801,7 +801,7 @@ class CWallet final : public WalletStorage, public interfaces::Chain::Notificati
     bool IsTrusted(const CWalletTx& wtx, std::set<uint256>& trusted_parents) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
     //! check whether we are allowed to upgrade (or already support) to the named feature
-    bool CanSupportFeature(enum WalletFeature wf) const override EXCLUSIVE_LOCKS_REQUIRED(cs_wallet) { AssertLockHeld(cs_wallet); return nWalletMaxVersion >= wf; }
+    bool CanSupportFeature(enum WalletFeature wf) const override EXCLUSIVE_LOCKS_REQUIRED(cs_wallet) { AssertLockHeld(cs_wallet); return IsFeatureSupported(nWalletMaxVersion, wf); }
 
     /**
      * populate vCoins with vector of available COutputs.

src/wallet/walletutil.cpp

@@ -70,3 +70,8 @@ std::vector<fs::path> ListWalletDir()
 
     return paths;
 }
+
+bool IsFeatureSupported(int wallet_version, int feature_version)
+{
+    return wallet_version >= feature_version;
+}

src/wallet/walletutil.h

@@ -29,7 +29,7 @@ enum WalletFeature
     FEATURE_LATEST = FEATURE_PRE_SPLIT_KEYPOOL
 };
 
-
+bool IsFeatureSupported(int wallet_version, int feature_version);
 
 enum WalletFlags : uint64_t {
     // wallet flags in the upper section (> 1 << 31) will lead to not opening the wallet if flag is unknown