How to merge many small balances into one with no harm to privacy?

[bitmover]

Or should I copy address from bluewallet and set it as second output (instead of change address in my wallet)

You need to send to a second output.

In electrum you will need to use click Tools > Pay to Many



After you click Pay to Many you can add more than 1 output. Then you will can add the second output with the remaining balance of your UTXOs and add the LN wallet address.

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[hosseinimr93]

To add to what stated by bitmover in the post above:

For sending the remaining balance to a certain address, you can insert "!" instead of an amount.
Assuming you have 1 BTC and you want to send 0.1 BTC to address A and the remaining balance to address B, fill the "Pay to" box as follows.

Code:

Address A, 0.1
Address B, !

In this way, Address A will receive 0.1 BTC and address B will receive 0.9 BTC - fee.

[adamvp]

Thanks @bitmover,
I've managed to figure it out, but I hope your manual will help other!

@hosseinimr93 your tip is excellent!

@LoyceV maybe there are some scripts or so to replace LN addres everytime by new ?

[LoyceV]

@LoyceV maybe there are some scripts or so to replace LN addres everytime by new ?

I haven't seen it. Each time you want a new address, you have to create a new LN-wallet inside the BlueWallet app.
BlueWallet is Open Source, so if you really want you can create it.

[adamvp]

That's what I meant.

I don't have much to do with programming, but I hope this solution will appear anytime soon

Maybe electrum will integrate it? Hmm have to suggest it to them on github.

[Pmalek]

You can use Wasabi wallet for CoinJoin which charges 0.003% as fee.

Wasabi's fees are OK, the only problem is that a CoinJoin round has a minimum amount that each user needs to deposit to be part of it. If my memory serves me right, that sum is 0.1 BTC. OP said that he has several addresses that contain less than 0.001 BTC. Let's say that each UTXO holds 0.001 BTC, in that case he would need 100 times that amount to meet the conditions to partake in a CoinJoin. I am not ruling out the possibility that he could have that many UTXO's, but I find it unlikely. 

[LoyceV]

Let's say that each UTXO holds 0.001 BTC, in that case he would need 100 times that amount to meet the conditions to partake in a CoinJoin.

That would still link all addresses together. There's not really a point in doing this unless many other people join with many small transactions too.

[o_e_l_e_o]

There's not really a point in doing this unless many other people join with many small transactions too.

What could work in this case is for someone to set up a service for consolidating small inputs similar to Peter Todd's Dust-B-Gone, but instead of sending all the dust to the miners, it consolidates all the inputs and returns them to their owners (minus a small fee). Each user would sign a transaction including all their outputs to be consolidated using SIGHASH_NONE and SIGHASH_ANYONECANPAY, and submit this transaction along with a return address to a service. Once 5, 10, 20, whatever users had submitted their transactions, the service would combine them all together and consolidate all those funds in to one address, pass it through ChipMixer or coinjoin to increase privacy, and then send the consolidated amounts back to each individual user.

It does mean you have to trust your coins to a centralized service, and of course your privacy is not protected from the service itself, however.