wallet: avoid extra IsSpentKey -> GetWalletTx lookups

src/wallet/receive.cpp

@@ -205,8 +205,8 @@ CAmount CachedTxGetAvailableCredit(const CWallet& wallet, const CWalletTx& wtx,
     CAmount nCredit = 0;
     uint256 hashTx = wtx.GetHash();
     for (unsigned int i = 0; i < wtx.tx->vout.size(); i++) {
-        if (!wallet.IsSpent(COutPoint(hashTx, i)) && (allow_used_addresses || !wallet.IsSpentKey(hashTx, i))) {
-            const CTxOut &txout = wtx.tx->vout[i];
+        const CTxOut& txout = wtx.tx->vout[i];
+        if (!wallet.IsSpent(COutPoint(hashTx, i)) && (allow_used_addresses || !wallet.IsSpentKey(txout.scriptPubKey))) {
             nCredit += OutputGetCredit(wallet, txout, filter);
             if (!MoneyRange(nCredit))
                 throw std::runtime_error(std::string(__func__) + " : value out of range");

src/wallet/rpc/coins.cpp

@@ -649,7 +649,7 @@ RPCHelpMan listunspent()
         CTxDestination address;
         const CScript& scriptPubKey = out.txout.scriptPubKey;
         bool fValidAddress = ExtractDestination(scriptPubKey, address);
-        bool reused = avoid_reuse && pwallet->IsSpentKey(out.outpoint.hash, out.outpoint.n);
+        bool reused = avoid_reuse && pwallet->IsSpentKey(scriptPubKey);
 
         if (destinations.size() && (!fValidAddress || !destinations.count(address)))
             continue;

src/wallet/spend.cpp

@@ -191,7 +191,7 @@ CoinsResult AvailableCoins(const CWallet& wallet,
                 continue;
             }
 
-            if (!allow_used_addresses && wallet.IsSpentKey(wtxid, i)) {
+            if (!allow_used_addresses && wallet.IsSpentKey(output.scriptPubKey)) {
                 continue;
             }