Improve CWallet API with new GetAccountPubkey function.

Remove one more caller that is passing CWalletDB.

src/wallet/wallet.cpp

@@ -1026,6 +1026,44 @@ bool CWallet::AccountMove(std::string strFrom, std::string strTo, CAmount nAmoun
     return true;
 }
 
+bool CWallet::GetAccountPubkey(CPubKey &pubKey, std::string strAccount, bool bForceNew)
+{
+    CWalletDB walletdb(strWalletFile);
+
+    CAccount account;
+    walletdb.ReadAccount(strAccount, account);
+
+    if (!bForceNew) {
+        if (!account.vchPubKey.IsValid())
+            bForceNew = true;
+        else {
+            // Check if the current key has been used
+            CScript scriptPubKey = GetScriptForDestination(account.vchPubKey.GetID());
+            for (map<uint256, CWalletTx>::iterator it = mapWallet.begin();
+                 it != mapWallet.end() && account.vchPubKey.IsValid();
+                 ++it)
+                BOOST_FOREACH(const CTxOut& txout, (*it).second.vout)
+                    if (txout.scriptPubKey == scriptPubKey) {
+                        bForceNew = true;
+                        break;
+                    }
+        }
+    }
+
+    // Generate a new key
+    if (bForceNew) {
+        if (!GetKeyFromPool(account.vchPubKey))
+            return false;
+
+        SetAddressBook(account.vchPubKey.GetID(), strAccount, "receive");
+        walletdb.WriteAccount(strAccount, account);
+    }
+
+    pubKey = account.vchPubKey;
+
+    return true;
+}
+
 void CWallet::MarkDirty()
 {
     {