📅 Original date posted:2019-03-21
📝 Original message:I'm not really sure the problem you're describing, but it sounds like something that affects normal bitcoin transactions as well.
There's certainly some interesting about the idea of "pre-fragmenting" your wallet utxo so you can make (or in payjoin: receive) payments with better privacy aspects.However, it's pretty unlikely to be practical for normal users, as it'll generally result in pretty big and cost-ineffective transactions.
In general though, there's like a 1000 different things you can do with coin selection, utxo management (and payjoin contributed input selection) but more often than not you are just making just making 1 trade off for another and good solutions will be wildly different depending on how you use your wallet.
-Ryan
‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Monday, March 18, 2019 3:55 AM, Kenshiro \[\] via bitcoin-dev <bitcoin-dev at lists.linuxfoundation.org> wrote:
> Hi,
>
> I think Payjoin can be a very good privacy solution for Bitcoin, but I have a question about it:
>
> - If a user has 1 BTC in a single address and make a payjoin payment to other person of 0.1 BTC using that address as input, the other person can see in a blockchain explorer the change address with an amount of 0.9 BTC. That's a serious privacy leak. I would like to know what will be the standard solution to this issue. An easy fix could be that the user wallet check if any address contains a BTC amount higher than a "safe" amount like 0.01 BTC or less. If some address exceed that amount the wallet could automatically make 1 payment to itself to split the amount in several addresses. In this way nobody receiving a payment from a user will ever know that he has a bitcoin balance higher than the "safe" amount.
>
> What do you think?
>
> Regards,
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.linuxfoundation.org/pipermail/bitcoin-dev/attachments/20190321/a8697048/attachment-0001.html>;
rhavar at protonmail.com [ARCHIVE] /
npub1gl…l5ays
2023-06-07 18:17:09
in reply to nevent1q…n2w4
Author Public Key
npub1glk4wtcgyl40v0zr2sz4vsxg5c00zx3ffrf3amr362pgx3fcd39q8l5aysPublished at
2023-06-07 18:17:09Event JSON
{
"id": "2b9f5da43e266c8897b99f7a77edc51a422480687ae293a09f4b087c21d1f8ce",
"pubkey": "47ed572f0827eaf63c4354055640c8a61ef11a2948d31eec71d2828345386c4a",
"created_at": 1686161829,
"kind": 1,
"tags": [
[
"e",
"3a64fa1d6bf0e09a03baff40f1b71b246951bee11f0718bb5fdf8d57f64b4ddf",
"",
"root"
],
[
"e",
"84b4daee6721ace6566aaf5d9eb58275065b853e278c55925420bd57ac7432db",
"",
"reply"
],
[
"p",
"0ce7e2b1ad324d13a3ee8a7b1c43f79ba8cda65d01dfbc5e5d30daeca7c3a598"
]
],
"content": "📅 Original date posted:2019-03-21\n📝 Original message:I'm not really sure the problem you're describing, but it sounds like something that affects normal bitcoin transactions as well.\n\nThere's certainly some interesting about the idea of \"pre-fragmenting\" your wallet utxo so you can make (or in payjoin: receive) payments with better privacy aspects.However, it's pretty unlikely to be practical for normal users, as it'll generally result in pretty big and cost-ineffective transactions.\n\nIn general though, there's like a 1000 different things you can do with coin selection, utxo management (and payjoin contributed input selection) but more often than not you are just making just making 1 trade off for another and good solutions will be wildly different depending on how you use your wallet.\n\n-Ryan\n\n‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐\nOn Monday, March 18, 2019 3:55 AM, Kenshiro \\[\\] via bitcoin-dev \u003cbitcoin-dev at lists.linuxfoundation.org\u003e wrote:\n\n\u003e Hi,\n\u003e\n\u003e I think Payjoin can be a very good privacy solution for Bitcoin, but I have a question about it:\n\u003e\n\u003e - If a user has 1 BTC in a single address and make a payjoin payment to other person of 0.1 BTC using that address as input, the other person can see in a blockchain explorer the change address with an amount of 0.9 BTC. That's a serious privacy leak. I would like to know what will be the standard solution to this issue. An easy fix could be that the user wallet check if any address contains a BTC amount higher than a \"safe\" amount like 0.01 BTC or less. If some address exceed that amount the wallet could automatically make 1 payment to itself to split the amount in several addresses. In this way nobody receiving a payment from a user will ever know that he has a bitcoin balance higher than the \"safe\" amount.\n\u003e\n\u003e What do you think?\n\u003e\n\u003e Regards,\n-------------- next part --------------\nAn HTML attachment was scrubbed...\nURL: \u003chttp://lists.linuxfoundation.org/pipermail/bitcoin-dev/attachments/20190321/a8697048/attachment-0001.html\u003e",
"sig": "61e172f7028fb6b67c1585d38e7d66b2becbfa3240046fafcce48d5f24c50f78b42c2e3a4de70191e04f26bd2660caa52203b44a390fbd169f05ae0159c7517c"
}