I have some generated Bitcoin addresses which I want to monitor for newly received transactions, I have a full node but I don't want to import those addresses to the node's wallet. I don't want to use any external service API like block.io or blockchain.com, I am working on my own code.
I want to keep this list of addresses in an external DB (MySql or Mongo) and I want to keep track of them until they receive let's say n confirmations.
I know I can user -blocknotify to receive information of newly mined blocks and with this new block I can scrape the transactions and look for the addresses I monitor. But how can I guarantee I will have all the UTXOs?
If the address is newly generated with the last block I can create my local DB with addresses information. But what should I do if I import (on my database, not Bitcoin Core wallet) an old address which had already been used, how can I check for UTXOs?
Also, how can I check if any of these monitored addresses have unconfirmed transactions?
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