_Originally posted by @S3RK in https://github.com/bitcoin/bitcoin/pull/24984#pullrequestreview-952900468_

> With current implementation we don't save the rescan progress and on the next load we will have to start from scratch. Is it possible to save the last processed blocked at shutdown?

It would be nice if wallet code would call `WriteBestBlock` and save the last scan position if it is interrupted during a sync. This could be implemented by trying to save the scan position during the shutdown, or by just periodically saving the scan position after an interval, similar to indexing code which saves sync position once every 30 seconds:

https://github.com/bitcoin/bitcoin/blob/f0a834e2f10a0aa60c7cc76e9f3eb090168a32e5/src/index/base.cpp#L170-L175
LogPrintf(("%s " + fmt).c_str(), GetDisplayName(), parameters...);
    };
    
    bool UpgradeWallet(int version, bilingual_str& error);
    
    std::set<ScriptPubKeyMan*> GetActiveScriptPubKeyMans() const;
    
    std::set<ScriptPubKeyMan*> GetAllScriptPubKeyMans() const;
    
    ScriptPubKeyMan* GetScriptPubKeyMan(const OutputType& type, bool internal) const;
    
    std::set<ScriptPubKeyMan*> GetScriptPubKeyMans(const CScript& script) const;
    
    ScriptPubKeyMan* GetScriptPubKeyMan(const uint256& id) const;
    
    std::unique_ptr<SigningProvider> GetSolvingProvider(const CScript& script) const;
    std::unique_ptr<SigningProvider> GetSolvingProvider(const CScript& script, SignatureData& sigdata) const;
    
    LegacyScriptPubKeyMan* GetLegacyScriptPubKeyMan() const;
    LegacyScriptPubKeyMan* GetOrCreateLegacyScriptPubKeyMan();
    
    void SetupLegacyScriptPubKeyMan();
    const CKeyingMaterial& GetEncryptionKey() const override;
    bool HasEncryptionKeys() const override;
    
    int GetLastBlockHeight() const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet)