Kruw

https://coinjoin.kruw.io/

Taxes are a scam. Inflation is a stealth tax. Bitcoin fixes this.

- Author of The Four Horsemen: https://delvingbitcoin.org/t/the-four-horsemen/2728
- Coinjoin world record holder: 278126c43dc16ec2f05ed2eff4c77d8871e502d5f61affcfea296312b4ce36a7

Public Key

npub1pww7030g95nv9ptfpgfu69jpfxj6pm33xxueztsupwekce45wx4sm6en60

Profile Code

nprofile1qqsqh808ch5z6fkzs45s5y7dzeq5nfdqaccnrwv39cwqhvmvv668r2cpz3mhxue69uhhyetvv9ujuerpd46hxtnfduq3samnwvaz7tmjv4kxz7fwwdhx7un59eek7cmfv9kq22s5sa

Publishing to

Author Public Key

npub1pww7030g95nv9ptfpgfu69jpfxj6pm33xxueztsupwekce45wx4sm6en60

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Last Notes

2026-07-19 17:09:04 CEST

If there was a Mount Rushmore for Bitcoin privacy devs, 3 out of the 4 heads would be @nprofile…sd8w making different faces.

2026-07-19 16:50:57 CEST

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PoC coming soon.

2026-07-19 14:26:39 CEST

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It's already baked in to The Four Horsemen, but it should be upstreamed to Payjoin:
In order to comply with this spec, wallet synchronization must be performed using compact block filters or the user’s full node *by default*. A client that passively intercepts coinjoin data from users should be considered .

2026-07-19 13:24:12 CEST

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I am going to propose an edit to BIP77 first. Default network level privacy is a critical prerequisite for any payjoin BIP compliance:
- Senders are disincentivized from opting in to payjoin by default since the receiver might be using a third party Electrum server. Their fee will be wasted, and chainalysis will intercept their data.
- Receivers are disincentivized from opting in to payjoin by default since the sender might be using a third party Electrum server. Their UTXO consolidation will be covertly exposed, and chainalysis will intercept their data.
- These compounding disincentives undermine the meta goal of payjoin, which is to dilute the certainty of mappings for any 2+ input 2+ output transaction.
- Third party Electrum servers create a perverse incentive between devs and their users, giving them privileged access to the data of users of unrelated wallets.
- Third party Electrum servers create a honeypot target, creating a dangerous environment for wallet developers.

2026-07-19 11:31:17 CEST

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All the prerequisite software exists, it's just scattered around. It could be assembled from Wasabi 1.0, Wasabi 2.0, and JoinMarket (all of these have overlapping payjoin support).

2026-07-19 05:51:01 CEST

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Wasn't Samourai both a Ten31 VC investment and Opensats donation beneficiary?

2026-07-18 21:28:16 CEST

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Even if a user doesn't care about their privacy at all, there is still a cost advantage for switching to a Four Horsemen supporting wallet.
Incentives matter in order to achieve privacy by default.

2026-07-18 20:02:25 CEST

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You identified the weakest UX flow in the entire spec 🎯
The only scenario where "Solo transaction" is the preferable path in the Four Horsemen workflow would be if the user needs an immediate payment, no batching, and bare minimum transaction fees. Using equal size outputs from taker coinjoins mitigates this.
Payjoin is the next cheapest, fastest option, only consuming ~40% more on chain fees than a solo transaction.

2026-07-18 15:56:31 CEST

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No, it makes sense when you add a third premise:
3. Scamming is easy when you print your own money and you'll probably get away with it

2026-07-18 04:22:32 CEST

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Tl;dr:
- If you are consolidating UTXOs, use WabiSabi
- If you are sending payments, use WabiSabi for maximum privacy, or Payjoin for lowest fees/wait
- If you are remixing, use ZeroLink
- If you are a whale, use JoinMarket's taker role
- If your node is waiting around, use JoinMarket's maker role
- If you are accepting payments, use Payjoin
https://blossom.yakihonne.com/d3e8d4713dfb3fd69f75f682744e3bcb12f069110151ccd842b4070aa5ad04ac.jpeg

2026-07-17 21:43:54 CEST

The Four Horsemen: A unified spec for Bitcoin coinjoin protocols, combining every existing on chain technology into one incentive compatible, block space efficient, flexible, decentralized implementation.
https://stacker.news/items/1526793

2026-07-15 22:03:28 CEST

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Ambitious! My first concern is that this fragments liquidity even further. 5 mix depths is already restrictive, having (long lived) LN channels is somewhat of a counter-incentive.
The problem of overly-passive makers has another solution: Automatically sweep all UTXOs using a taker transaction whenever a mix depth accumulates N number of change/equal output UTXOs. Maybe default 19-21 UTXO limit per mix depth (randomized)?

2026-07-15 13:17:26 CEST

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That doesn't get the point across as clearly. Someone might misinterpret "alone" this way:
Operators can never spend their coins without your permission
Clearly stating that they are taking on the risk of theft is the only ethical way to present it.

2026-07-15 12:42:05 CEST

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There's a typo: It should say "The operator CAN spend your funds"

2026-07-14 19:54:07 CEST

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Silent Payments (BIP352) is superior than Paynym (BIP47), for both privacy and fees.
Coinjoin has better privacy than Payjoin, but the fees are higher. So it's a tradeoff.

2026-06-28 12:45:55 CEST

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@nprofile…9hay referred to in the screensot as a "Top Dev" 😇

2026-06-04 22:54:45 CEST

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I just downgraded from to Amethyst v1.08 because later versions are broken for me.

2026-05-15 19:32:14 CEST

459 input coinjoin transaction just confirmed - https://mempool.space/tx/aa7d6ab90c846da3d8b089e73fddd535ffbee88bcb34c44860f336a495b01ae4
Here is the cluster mempool ancestry chart:
https://i.ibb.co/r2KhsPrK/Screenshot-from-2026-05-15-13-17-59.png

2026-04-29 12:48:32 CEST

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Why didn't you show a graph of Wasabi Wallet's coinjoin pool size alongside Ashigaru's? Wasabi had 300,000+ BTC in total coinjoin volume in 2025.

2026-04-01 11:50:11 CEST

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Nice, @nprofile…gldk is moving to Arti as well: https://github.com/WalletWasabi/WalletWasabi/pull/14216

2026-03-29 16:27:51 CEST

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@nprofile…gldk has coinjoins so you can transact on chain anonymously.

2026-03-23 11:24:29 CET

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Can't veto coinjoins unless you have 51% of the hasrate 😎

2026-03-13 09:33:01 CET

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No, this is Nostr, so I don't have to shut up about you being wrong.
Payjoins are larger than normal transactions, get over it.

2026-03-13 09:19:33 CET

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I just explained how your design lets a payjoin sender could drain the receiver's wallet. Do some research before spreading misinformation:
"In exchange for the privacy benefit, the sender has to pay more fees than a normal transaction. It is a con for the sender, but a pro for the receiver, since the receiver does not have to consolidate its coin later." - @nprofile…zq33 (coinventor of payjoin)
https://nopara73.medium.com/pay-to-endpoint-56eb05d3cac6

2026-03-12 19:32:27 CET

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You are wrong. If what you claim were actually implemented, it would create an attack vector where the sender creates a payjoin transaction at a high fee rate and burns the receiver's input.

2026-03-12 19:27:51 CET

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Yes, so the incentive is to "never payjoin" as the sender and "always payjoin" as the receiver.

2026-03-12 19:26:19 CET

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A payjoin always has at least 2 inputs, and it always consumes more data than a normal transaction.

2026-03-12 19:23:07 CET

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Payjoin isn't a fork. Stop spreading blatant misinformation.

2026-03-12 18:33:05 CET

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Incentive imbalance: Payjoin senders pay mining fees for the receiver.

2026-03-12 18:02:20 CET

Someone paid 483k sats in mining fees for a 31k sat output at 6 sat/vbyte 😓
https://mempool.space/tx/9f3ab719ce9e82acd1b3e2470e85960f29cd2f4c967ce450ef0c76c9c28e338b

2026-02-26 10:08:12 CET

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@nprofile…9hay 2 sat/vbyte seems a little high.

2026-02-25 18:27:37 CET

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Why did you censor the abbreviation for national socialism?

2026-02-24 09:45:37 CET

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498 inputs: https://mempool.space/tx/278126c43dc16ec2f05ed2eff4c77d8871e502d5f61affcfea296312b4ce36a7
652 outputs: https://mempool.space/tx/c559ee0e19aa8ce15ee1191b611daf409e90ddb6eca1d887590806e04d4ebbe3

2026-02-18 13:39:06 CET

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I see this from Amethyst.

2026-02-05 18:15:47 CET

People will forgive you for being wrong, but they will never forgive you for being right.

2026-01-29 15:22:34 CET

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Need to add @nprofile…gldk to the spreadsheet 😎

2026-01-24 04:26:17 CET

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You are lying, you used present tense ("We cheer") instead of future tense ("We will cheer"). That's why it's a "report" and not a "prediction".

2026-01-23 19:46:05 CET

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How do we verify your report that Milei and Bukele are "cracking down" on people for being "poor"?
#nevent1q…aycm

2026-01-22 21:57:26 CET

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Wasabi is way better. There's no common input ownership leaked, no toxic change outputs, and 100x more liquidity.

2026-01-04 17:42:03 CET

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Democracy is evil and should be abolished.

2025-12-08 09:50:48 CET

This week, Wasabi had a new developer contribute code and a new coordinator create coinjoins. Lfg.

2025-12-03 20:59:12 CET

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Be your own bank
Be your own accountant
Be your own lawyer? 😅

2025-11-30 09:45:09 CET

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Why does your node track back to block 500? Wouldn't it make more sense to check from block 481,824 when segwit was activated?

2025-11-15 18:51:33 CET

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Nothing to do with what?

2025-11-15 18:31:00 CET

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Ah we're making progress! Since you ackowledge that Samourai spying on their users is optional, why don't you correct your article?

2025-11-15 18:24:41 CET

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The existance of privacy preserving BIP157/158 block filters isn't an "opinion". It's a well known FACT:
#nevent1q…zwvw

2025-11-15 17:34:46 CET

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What about you disagreeing with yourself? https://image.nostr.build/5d57290d71a25384f960fe869bf9734be0b05dfab25891a71d269fa8b8203b76.jpg https://image.nostr.build/5d57290d71a25384f960fe869bf9734be0b05dfab25891a71d269fa8b8203b76.jpg

2025-11-15 17:27:23 CET

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You should be focusng correcting your fake news article instead of focusing on insulting me: #nevent1q…2rs6

2025-11-15 17:20:33 CET

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You tried to dunk on him for being a sex offender when that has nothing to do with zero knowledge privacy.

2025-11-15 17:18:40 CET

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What does this screenshot prove other than you liking your own twitter posts? Embarassing.

2025-11-15 17:14:33 CET

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L0la L33tz: "Bitcoiners will go to jail 😏"
Simps: "So true queen!"
Andrew Tate: "Bitcoiners will go to jail."
L0la L33tz: "SOMEBODY STOP THIS SEX OFFENDER???"

2025-11-12 18:06:10 CET

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You aren't being genuine, you were already shown that sending payments directly inside a WabiSabi coinjoin was possible, and you weren't able to trace it: https://x.com/Kruwed/status/1883127851697975304?s=20

2025-11-06 18:32:15 CET

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You forgot to make this correction:
https://image.nostr.build/b7ebcd17f212076b1d85acacc7fd9a4b8c16b400d88cc17b2d9023418e191f55.jpg

2025-10-20 20:48:57 CEST

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@nprofile…gldk fixes this.

2025-10-16 20:38:11 CEST

498 input coinjoin transaction, NEW WORLD RECORD!
https://mempool.space/tx/278126c43dc16ec2f05ed2eff4c77d8871e502d5f61affcfea296312b4ce36a7

2025-09-23 18:44:48 CEST

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Good point, everyone should stop paying taxes immediately!

2025-09-23 11:56:17 CEST

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Since this configurable option only creates downsides from changing its default, why should it exist in the first place?

2025-09-23 10:58:32 CEST

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No, that's appeal to popularity fallacy.
Let's say some non-trivial segment of users say their unlucky number is 13. Does that mean Bitcoin Core should support a configuration to censor transactions that contain the number 13 in them?

2025-09-16 22:39:22 CEST

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Mara is still mining transactions below 1 sat/vbyte. They just aren't mining bids as low as 0.1 sat/vbyte, it appears their price floor is 0.5 sat/vbyte.

2025-09-16 12:43:51 CEST

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The bet is that your fork will gain more adoption than Bitcoin Core.
...you ARE planning on forking, right?

2025-09-02 13:44:56 CEST

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Silent Payments (BIP352) solved this problem already - https://github.com/bitcoin/bips/blob/master/bip-0352.mediawiki

2025-09-02 01:01:11 CEST

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Why should software have a config option that doesn't do anything?

2025-09-01 02:51:17 CEST

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@nprofile…egk9's coinjoin coordinator is in second for average input count.
#nevent1q…crrf

2025-09-01 01:19:28 CEST

I will work twice as hard on Labor Day to negate the laziness of the communists.

2025-08-31 17:24:18 CEST

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Anti Knots. The point of running a node is to validate payments you receive. Anyone who thinks they can use their node is to censor transactions made by other people is a retard.

2025-08-26 06:43:55 CEST

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The @nprofile…fhr9 coinjoin tracking bot is underrated.

2025-08-25 04:19:46 CEST

Looking at my Lightning wallet, I make 40+ off chain payments for each on chain transaction.

2025-08-25 03:48:25 CEST

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"Shitcoin" status becomes permanent once an arbitrary transaction is reversed: Ethereum is a shitcoin due to the DAO hard fork, and Ripple is a shitcoin due to the Balance Freeze.

2025-08-23 17:25:56 CEST

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Graphene isn't available yet for the Pixel 10: https://x.com/GrapheneOS/status/1958244348119912839

2025-08-22 05:38:15 CEST

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Can you substantiate your claim that Javier Milei and Nayib Bukele are "cracking down" on people for being "poor"? Or are you just making up fake news again?

2025-08-07 16:52:08 CEST

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Why do you think winning is "retarded"?

2025-08-07 13:58:47 CEST

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Why aren't you instructing Bitcoiners that they should fight back by running their own coinjoin coprdinator nodes? Surrender is terrible advice.

2025-08-05 11:13:36 CEST

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@nprofile…mjyh made Bitcoin completely anonymous:
- Connects through Tor by default
- BIP 157/158 synchronization
- Coinjoin to make on chain history untraceable

2025-08-02 01:08:24 CEST

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@nprofile…mjyh supports silent payments 😎

2025-08-02 01:07:11 CEST

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@nprofile…mjyh supports it. You can donate completely anonymously if you coinjoin first.

2025-07-13 15:11:48 CEST

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332 inputs per coinjoin transaction!
#nevent1q…qnzn

2025-07-12 03:43:04 CEST

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https://image.nostr.build/57a86d38d9f4b61aa10f38bbc8a31320bc33f725ade9e9da63bdaf83ddae43e1.jpg

2025-07-07 01:40:28 CEST

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Taxes are a scam.

2025-06-29 15:43:17 CEST

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Hot take #3:
Convincing normies to pay with Bitcoin instead of credit cards is hard. Credit cards allow you to dispute payments if you were scammed, spend money you haven't earned yet, and get 1%+ cash back on your purchases.
Merchants demanding Bitcoin has been and will be the driver of adoption.
#nevent1q…4wkr

2025-06-28 19:49:41 CEST

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Talent hits the target no one else can hit.
Genius hits the target no one else can see.

2025-06-28 01:30:31 CEST

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Hot take #2:
As a libertarian, I would voluntarily fund the use of military force against scam call factories in India. Literally drop a bomb on the office and kill all the parasites inside.
#nevent1q…f4lm

2025-06-26 14:29:22 CEST

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This just pushes the question further away: What difference does it make if the average age of the population is 35 years instead of 45 years?

2025-06-26 13:41:35 CEST

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I can't understand why people think declining birthrate/population is a problem. What difference does it make if you live on a planet with 5 billion people vs 10 billion people?

2025-06-26 13:34:01 CEST

I noted down over a dozen topics that I wanted to write articles about. Then I realized this would result in anecdotal ranting unless I compiled data to prove my points.
So I'll just slowly dump a summary of these "hot takes" on Nostr instead:

2025-06-24 13:43:06 CEST

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No trust is required for WabiSabi coordinators (other than server liveness).
You would be able to detect any tagging attacks by comparing your client's round ID with the public one published by the coordinator (see https://coinjoin.kruw.io/wabisabi/human-monitor )

2025-06-18 12:59:39 CEST

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Any recommendations for purifying water?

2025-06-15 22:56:15 CEST

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~7,500 new BTC entered coinjoin transactions over the past month, so that's the relative liquidity for Satoshi to hide up to 1 million BTC 🤐 @nprofile…fhr9 has the statistics.

2025-06-15 22:49:51 CEST

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Tiny amounts could be made anonymous with a coinjoin transaction. @nprofile…mjyh handles this.

2025-06-15 21:13:46 CEST

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Keet still isn't open source 😑

2025-06-09 22:58:29 CEST

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How do they enhance coinjoins?

2025-06-05 22:54:49 CEST

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...The USA defaulted on their gold contracts back in 1971. The amount of gold you are "auditing" the Fort to check for is literally zero.

2025-06-05 02:25:08 CEST

We are faced with the problems of loss of privacy, creeping computerization, massive databases, more centralization - and Chaum offers a completely different direction to go in, one which puts power into the hands of individuals rather than governments and corporations. The computer can be used as a tool to liberate and protect people, rather than to control them. - Hal Finney

2025-06-05 00:08:49 CEST

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The vote was unanimous, 69 to ZERO.
Abolish democracy.
#nevent1q…z4r8

2025-05-16 15:18:16 CEST

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"Grouphug" is basically a huge payjoin that collects Peach's fee - #nevent1q…xw3t

2025-05-12 21:49:36 CEST

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It should be clear that approach failed by now, your pool is simply getting outcompeted.

2025-05-12 21:05:19 CEST

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It's a soft fotk. Here's the code to do it: https://github.com/rot13maxi/bitcoin-purifier

2025-05-12 19:41:01 CEST

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OCEAN controls less than 1% of the hashpower. It's safe to conclude their censorship project failed, as expected.

2025-05-12 19:12:37 CEST

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Not if your fork had 51% of the hashpower, the Bitcoin Pure chain would reorg the Bitcoin Core chain.

2025-05-12 18:49:34 CEST

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Yes, even empty blocks are valid and reorgs are valid blocks as well. However, these blocks are not economically competitive in the long run (unless you have a massive short position on Bitcoin...)

2025-05-12 18:04:29 CEST

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Txs with invalid signatures will create an invalid block, so I would say they are "rejected" rather than "censored".
The sample size of the picture is small, so the skew might not be that bad over time. However, the OCEAN's failure to attract >1% of the total hashpower is a revealing fact about the market's preferences.