* If a certain zaddr has more than 30 zutxos (items in the array output of `z_listunspent`) it's likely they are mining to the exchange, or sending many small deposits
* You can then manually inspect these user accounts or send them a message to not mine to the exchange
* The `rescan` RPC in Hush 3.9.1 can be used to rescan from any block height, which minimizes downtime.
* Example usage: `hush-cli rescan 123456`
* Example usage: `hush-cli rescan 123456`
* Another important way to minimize downtime is the use the `-keepnotewitnesscache` option to hushd, for instance:
* `hushd -keepnotewitnesscache -rescanheight 123456` will greatly speed up rescanning by only updating the Sapling zaddr witness cache instead of calculating it from scratch
* It's best to only send payouts a few times per day (such as 2 or 3) instead of when they are above a threshold.
* This will make pool wallets smaller and faster, miner wallets smaller and faster, and exchange wallets smaller and faster (because miners often mine directly to pools)
* For exchanges, you can limit how many withdrawals a user can do per day, such as 3, and show them how many they have left. This will help keep wallets small and fast.
