For one of our decentralized mobile wallet, We need to fetch balance of imported BTC address quickly.
After lot of research on google then I found Bitcoin deamon rpc command "scantxoutset", which give unspent outputs of imported address.
The only problem with this command is that it takes more than a minute to return the response, which is too slow. User will not wait for 1 minute.
Anyone, could you please suggest me, is there any alternative to fetch the balance of imported BTC address quickly from the BTC node. ( not from any third party api)