Move some of ProcessImport into CWallet::Import*

This maintains encapsulation of CWallet::database in the face of
batching, e.g. allows making the `WithDB` methods private.

src/wallet/rpcdump.cpp

@@ -1261,57 +1261,18 @@ static UniValue ProcessImport(CWallet * const pwallet, const UniValue& data, con
 
         // All good, time to import
         pwallet->MarkDirty();
-        WalletBatch batch(pwallet->GetDBHandle());
+        if (!pwallet->ImportScripts(import_data.import_scripts)) {
-        for (const auto& entry : import_data.import_scripts) {
-            if (!pwallet->HaveCScript(CScriptID(entry)) && !pwallet->AddCScriptWithDB(batch, entry)) {
             throw JSONRPCError(RPC_WALLET_ERROR, "Error adding script to wallet");
         }
-         }
+        if (!pwallet->ImportPrivKeys(privkey_map, timestamp)) {
-         for (const auto& entry : privkey_map) {
-             const CKey& key = entry.second;
-             CPubKey pubkey = key.GetPubKey();
-             const CKeyID& id = entry.first;
-             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->AddKeyPubKeyWithDB(batch, key, pubkey)) {
             throw JSONRPCError(RPC_WALLET_ERROR, "Error adding key to wallet");
         }
-             pwallet->UpdateTimeFirstKey(timestamp);
+        if (!pwallet->ImportPubKeys(ordered_pubkeys, pubkey_map, import_data.key_origins, add_keypool, internal, timestamp)) {
-        }
-        for (const auto& entry : import_data.key_origins) {
-            pwallet->AddKeyOriginWithDB(batch, entry.second.first, entry.second.second);
-        }
-        for (const CKeyID& id : ordered_pubkeys) {
-            auto entry = pubkey_map.find(id);
-            if (entry == pubkey_map.end()) {
-                continue;
-            }
-             const CPubKey& pubkey = entry->second;
-             CPubKey temp;
-             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;
+        if (!pwallet->ImportScriptPubKeys(label, script_pub_keys, have_solving_data, internal, timestamp)) {
-
-            // Add to keypool only works with pubkeys
-            if (add_keypool) {
-                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->AddWatchOnlyWithDB(batch, script, timestamp)) {
             throw JSONRPCError(RPC_WALLET_ERROR, "Error adding address to wallet");
         }
-            }
-            CTxDestination dest;
-            ExtractDestination(script, dest);
-            if (!internal && IsValidDestination(dest)) {
-                pwallet->SetAddressBook(dest, label, "receive");
-            }
-        }
 
         result.pushKV("success", UniValue(true));
     } catch (const UniValue& e) {

src/wallet/wallet.cpp

@@ -1625,6 +1625,80 @@ bool CWallet::DummySignTx(CMutableTransaction &txNew, const std::vector<CTxOut>
     return true;
 }
 
+bool CWallet::ImportScripts(const std::set<CScript> scripts)
+{
+    WalletBatch batch(*database);
+    for (const auto& entry : scripts) {
+        if (!HaveCScript(CScriptID(entry)) && !AddCScriptWithDB(batch, entry)) {
+            return false;
+        }
+    }
+    return true;
+}
+
+bool CWallet::ImportPrivKeys(const std::map<CKeyID, CKey>& privkey_map, const int64_t timestamp)
+{
+    WalletBatch batch(*database);
+    for (const auto& entry : privkey_map) {
+        const CKey& key = entry.second;
+        CPubKey pubkey = key.GetPubKey();
+        const CKeyID& id = entry.first;
+        assert(key.VerifyPubKey(pubkey));
+        mapKeyMetadata[id].nCreateTime = timestamp;
+        // If the private key is not present in the wallet, insert it.
+        if (!HaveKey(id) && !AddKeyPubKeyWithDB(batch, key, pubkey)) {
+            return false;
+        }
+        UpdateTimeFirstKey(timestamp);
+    }
+    return true;
+}
+
+bool CWallet::ImportPubKeys(const std::vector<CKeyID>& ordered_pubkeys, const std::map<CKeyID, CPubKey>& pubkey_map, const std::map<CKeyID, std::pair<CPubKey, KeyOriginInfo>>& key_origins, const bool add_keypool, const bool internal, const int64_t timestamp)
+{
+    WalletBatch batch(*database);
+    for (const auto& entry : key_origins) {
+        AddKeyOriginWithDB(batch, entry.second.first, entry.second.second);
+    }
+    for (const CKeyID& id : ordered_pubkeys) {
+        auto entry = pubkey_map.find(id);
+        if (entry == pubkey_map.end()) {
+            continue;
+        }
+        const CPubKey& pubkey = entry->second;
+        CPubKey temp;
+        if (!GetPubKey(id, temp) && !AddWatchOnlyWithDB(batch, GetScriptForRawPubKey(pubkey), timestamp)) {
+            return false;
+        }
+        mapKeyMetadata[id].nCreateTime = timestamp;
+
+        // Add to keypool only works with pubkeys
+        if (add_keypool) {
+            AddKeypoolPubkeyWithDB(pubkey, internal, batch);
+            NotifyCanGetAddressesChanged();
+        }
+    }
+    return true;
+}
+
+bool CWallet::ImportScriptPubKeys(const std::string& label, const std::set<CScript>& script_pub_keys, const bool have_solving_data, const bool internal, const int64_t timestamp)
+{
+    WalletBatch batch(*database);
+    for (const CScript& script : script_pub_keys) {
+        if (!have_solving_data || !::IsMine(*this, script)) { // Always call AddWatchOnly for non-solvable watch-only, so that watch timestamp gets updated
+            if (!AddWatchOnlyWithDB(batch, script, timestamp)) {
+                return false;
+            }
+        }
+        CTxDestination dest;
+        ExtractDestination(script, dest);
+        if (!internal && IsValidDestination(dest)) {
+            SetAddressBook(dest, label, "receive");
+        }
+    }
+    return true;
+}
+
 int64_t CalculateMaximumSignedTxSize(const CTransaction &tx, const CWallet *wallet, bool use_max_sig)
 {
     std::vector<CTxOut> txouts;

src/wallet/wallet.h

@@ -704,6 +704,20 @@ private:
     bool AddWatchOnly(const CScript& dest) override EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
     bool AddWatchOnlyWithDB(WalletBatch &batch, const CScript& dest) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
+    /** Add a KeyOriginInfo to the wallet */
+    bool AddKeyOriginWithDB(WalletBatch& batch, const CPubKey& pubkey, const KeyOriginInfo& info);
+
+    //! Adds a key to the store, and saves it to disk.
+    bool AddKeyPubKeyWithDB(WalletBatch &batch,const CKey& key, const CPubKey &pubkey) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
+
+    //! Adds a watch-only address to the store, and saves it to disk.
+    bool AddWatchOnlyWithDB(WalletBatch &batch, const CScript& dest, int64_t create_time) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
+
+    void AddKeypoolPubkeyWithDB(const CPubKey& pubkey, const bool internal, WalletBatch& batch);
+
+    //! Adds a script to the store and saves it to disk
+    bool AddCScriptWithDB(WalletBatch& batch, const CScript& script);
+
     /** Interface for accessing chain state. */
     interfaces::Chain* m_chain;
 
@@ -854,7 +868,6 @@ public:
     CPubKey GenerateNewKey(WalletBatch& batch, bool internal = false) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
     //! Adds a key to the store, and saves it to disk.
     bool AddKeyPubKey(const CKey& key, const CPubKey &pubkey) override EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
-    bool AddKeyPubKeyWithDB(WalletBatch &batch,const CKey& key, const CPubKey &pubkey) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
     //! Adds a key to the store, without saving it to disk (used by LoadWallet)
     bool LoadKey(const CKey& key, const CPubKey &pubkey) { return CCryptoKeyStore::AddKeyPubKey(key, pubkey); }
     //! Load metadata (used by LoadWallet)
@@ -871,7 +884,6 @@ public:
     //! Adds an encrypted key to the store, without saving it to disk (used by LoadWallet)
     bool LoadCryptedKey(const CPubKey &vchPubKey, const std::vector<unsigned char> &vchCryptedSecret);
     bool AddCScript(const CScript& redeemScript) override;
-    bool AddCScriptWithDB(WalletBatch& batch, const CScript& script);
     bool LoadCScript(const CScript& redeemScript);
 
     //! Adds a destination data tuple to the store, and saves it to disk
@@ -887,7 +899,6 @@ public:
 
     //! Adds a watch-only address to the store, and saves it to disk.
     bool AddWatchOnly(const CScript& dest, int64_t nCreateTime) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
-    bool AddWatchOnlyWithDB(WalletBatch &batch, const CScript& dest, int64_t create_time) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
     bool RemoveWatchOnly(const CScript &dest) override EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
     //! Adds a watch-only address to the store, without saving it to disk (used by LoadWallet)
     bool LoadWatchOnly(const CScript &dest);
@@ -975,6 +986,11 @@ public:
     bool DummySignTx(CMutableTransaction &txNew, const std::vector<CTxOut> &txouts, bool use_max_sig = false) const;
     bool DummySignInput(CTxIn &tx_in, const CTxOut &txout, bool use_max_sig = false) const;
 
+    bool ImportScripts(const std::set<CScript> scripts) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
+    bool ImportPrivKeys(const std::map<CKeyID, CKey>& privkey_map, const int64_t timestamp) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
+    bool ImportPubKeys(const std::vector<CKeyID>& ordered_pubkeys, const std::map<CKeyID, CPubKey>& pubkey_map, const std::map<CKeyID, std::pair<CPubKey, KeyOriginInfo>>& key_origins, const bool add_keypool, const bool internal, const int64_t timestamp) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
+    bool ImportScriptPubKeys(const std::string& label, const std::set<CScript>& script_pub_keys, const bool have_solving_data, const bool internal, const int64_t timestamp) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
+
     CFeeRate m_pay_tx_fee{DEFAULT_PAY_TX_FEE};
     unsigned int m_confirm_target{DEFAULT_TX_CONFIRM_TARGET};
     bool m_spend_zero_conf_change{DEFAULT_SPEND_ZEROCONF_CHANGE};
@@ -994,7 +1010,6 @@ public:
     bool NewKeyPool();
     size_t KeypoolCountExternalKeys() EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
     bool TopUpKeyPool(unsigned int kpSize = 0);
-    void AddKeypoolPubkeyWithDB(const CPubKey& pubkey, const bool internal, WalletBatch& batch);
 
     /**
      * Reserves a key from the keypool and sets nIndex to its index
@@ -1211,9 +1226,6 @@ public:
 
     /** Implement lookup of key origin information through wallet key metadata. */
     bool GetKeyOrigin(const CKeyID& keyid, KeyOriginInfo& info) const override;
-
-    /** Add a KeyOriginInfo to the wallet */
-    bool AddKeyOriginWithDB(WalletBatch& batch, const CPubKey& pubkey, const KeyOriginInfo& info);
 };
 
 /**