Batch writes for importmulti

When writing all of the imported data to the wallet, use a common
WalletBatch object so that batch writes are done and the writes
finish more quickly.

AddKeypoolPubkey is no longer needed so it is also removed

Author: achow101

src/wallet/rpcdump.cpp

@@ -1261,8 +1261,9 @@ static UniValue ProcessImport(CWallet * const pwallet, const UniValue& data, con
 
         // All good, time to import
         pwallet->MarkDirty();
+        WalletBatch batch(pwallet->GetDBHandle());
         for (const auto& entry : import_data.import_scripts) {
-            if (!pwallet->HaveCScript(CScriptID(entry)) && !pwallet->AddCScript(entry)) {
+            if (!pwallet->HaveCScript(CScriptID(entry)) && !pwallet->AddCScriptWithDB(batch, entry)) {
                 throw JSONRPCError(RPC_WALLET_ERROR, "Error adding script to wallet");
              }
          }
@@ -1273,13 +1274,13 @@ static UniValue ProcessImport(CWallet * const pwallet, const UniValue& data, con
              assert(key.VerifyPubKey(pubkey));
              pwallet->mapKeyMetadata[id].nCreateTime = timestamp;
              // If the private key is not present in the wallet, insert it.
-             if (!pwallet->HaveKey(id) && !pwallet->AddKeyPubKey(key, pubkey)) {
+             if (!pwallet->HaveKey(id) && !pwallet->AddKeyPubKeyWithDB(batch, key, pubkey)) {
                  throw JSONRPCError(RPC_WALLET_ERROR, "Error adding key to wallet");
              }
              pwallet->UpdateTimeFirstKey(timestamp);
         }
         for (const auto& entry : import_data.key_origins) {
-            pwallet->AddKeyOrigin(entry.second.first, entry.second.second);
+            pwallet->AddKeyOriginWithDB(batch, entry.second.first, entry.second.second);
         }
         for (const CKeyID& id : ordered_pubkeys) {
             auto entry = pubkey_map.find(id);
@@ -1288,20 +1289,20 @@ static UniValue ProcessImport(CWallet * const pwallet, const UniValue& data, con
             }
              const CPubKey& pubkey = entry->second;
              CPubKey temp;
-             if (!pwallet->GetPubKey(id, temp) && !pwallet->AddWatchOnly(GetScriptForRawPubKey(pubkey), timestamp)) {
+             if (!pwallet->GetPubKey(id, temp) && !pwallet->AddWatchOnlyWithDB(batch, GetScriptForRawPubKey(pubkey), timestamp)) {
                 throw JSONRPCError(RPC_WALLET_ERROR, "Error adding address to wallet");
             }
             pwallet->mapKeyMetadata[id].nCreateTime = timestamp;
 
             // Add to keypool only works with pubkeys
             if (add_keypool) {
-                pwallet->AddKeypoolPubkey(pubkey, internal);
+                pwallet->AddKeypoolPubkeyWithDB(pubkey, internal, batch);
             }
         }
 
         for (const CScript& script : script_pub_keys) {
             if (!have_solving_data || !::IsMine(*pwallet, script)) { // Always call AddWatchOnly for non-solvable watch-only, so that watch timestamp gets updated
-                if (!pwallet->AddWatchOnly(script, timestamp)) {
+                if (!pwallet->AddWatchOnlyWithDB(batch, script, timestamp)) {
                     throw JSONRPCError(RPC_WALLET_ERROR, "Error adding address to wallet");
                 }
             }

src/wallet/wallet.cpp

@@ -3372,13 +3372,6 @@ bool CWallet::TopUpKeyPool(unsigned int kpSize)
     return true;
 }
 
-void CWallet::AddKeypoolPubkey(const CPubKey& pubkey, const bool internal)
-{
-    WalletBatch batch(*database);
-    AddKeypoolPubkeyWithDB(pubkey, internal, batch);
-    NotifyCanGetAddressesChanged();
-}
-
 void CWallet::AddKeypoolPubkeyWithDB(const CPubKey& pubkey, const bool internal, WalletBatch& batch)
 {
     LOCK(cs_wallet);

src/wallet/wallet.h

@@ -994,7 +994,6 @@ class CWallet final : public CCryptoKeyStore, private interfaces::Chain::Notific
     bool NewKeyPool();
     size_t KeypoolCountExternalKeys() EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
     bool TopUpKeyPool(unsigned int kpSize = 0);
-    void AddKeypoolPubkey(const CPubKey& pubkey, const bool internal);
     void AddKeypoolPubkeyWithDB(const CPubKey& pubkey, const bool internal, WalletBatch& batch);
 
     /**