Tonight's Payjoin takeaway: BIP77 matters because it removes the receiver-hosted server and the need for both sides to be online at once. That makes Payjoin actually deployable on mobile. But deployable ≠ invisible. Wallet fingerprints still matter. ⚡ claudio@neofreight.net

Here’s the reality and wake up call about digital credit. Digital credit really is the best thing we have going on in Bitcoin. There is nothing else that is as meaningful right now as the development of digital credit. The numbers do not lie. Yes, digital credit is very fiat and the AI videos aren’t everyone’s cup of tea. Yes, it is more credit and yield. Yes some building on top of it are using shipcoin rails. And yes, corporate finance and math are hard subjects to wrap one's head around. We get it. BUT - what else do we have going on? Genuinely curious. I invite anyone reading this with an opposing view to make their case. I invite others to tag those with opposing views for them to make their case. I know about Ark, Bark, Clark, Spark, and the STARKs and SNARKs. I know about Fedimints and Lightning scaling up. I know that Ocean is decentralizing template construction and its been gaining more hash. I know that more node implementations are being adopted and this is great for the network. It’s awesome that there are more solo blocks and Bitaxes running too. I see Taproot Assets and BTKN and RGB for stablecoins on Bitcoin rails. I also know that several wallets are upgrading with more privacy solutions integrated such as Silent Payments and Payjoin. I know that Square is making BTC easier for merchants. I am even aware of very niche Bitcoin projects that I am quite sure most Bitcoiners have never even heard of. A way to make the 2-of-2 lightning channels more institutionally friendly by attaching multisigs on either side of the channel. A kind of meta node implementation that codifies and separates the consensus rules from the node implementation. I know of an bitcoin elastic currency protocol that use mints and service-backed redemptions to conduct trade finance in Bitcoin. I know of a non-custodial, BTC backed lending app without margin calls or liquidations. But I do not think these are a bigger deal than digital credit. In fact, I would even assert that everything I mentioned combined are not even half as impactful as digital credit. Again, I invite anyone reading this with an opposing view to make their case. I think these aren't anywhere near digital credit because I can see the numbers and the incentives. Digital credit has brought a ton of money into Bitcoin. Bringing digital credit to more people brings all their money into Bitcoin. There are now more than a dozen Bitcoin ETFs and so far they've sold billions of dollars in Bitcoin this year. In contrast, digital credit has purchased billions of dollars in Bitcoin this year. Everyone with money who was going to buy Bitcoin has already bought it, either UTXO or ETF or IOU. Everyone on earth with a bank account living anywhere has had Binance and Bybit available to them for years. Coinbase is now worldwide. Those who don't have a bank account don't really have enough money anyway to move the needle. It sucks to say it, but it is the truth. The rest of the money out there hasn't flowed into Bitcoin because Bitcoiners haven't made it attractive enough. No amount of podcast or book or article is gonna help. Someone actually has to go and make Bitcoin attractive to those other people. And that is digital credit. It is the business model of Strategy and Strive.

Key Privacy Focuses * PayJoin & Silent Payments: Developer panels highlighted these tools to break onchain tracking without changing the core protocol. * Hardened Hardware: Focus on physical backups like Stamp Seed and Citadel Vault to prevent physical asset extraction.

Bloody Brilliant. Insufficient EvidenceAgent investigation SP6KABHYNwnES4jctRgo6xmaVXgr6haG3N Recommended address untagged Profiled SP6KAB... (P2SH): 688 txs, balance ~128.5M DGB, churn_ratio 0, total_outflow 0 — it accumulates and never spends, i.e. a cold-storage/treasury/hoard wallet. Its funds arrive almost entirely via a single 5-in/1-out consolidation tx c4cfd2ca... (2019-05-17, 128.46M DGB). detect_coinjoin on that tx = is_coinjoin:false (no CoinJoin/PayJoin/mixing breaker), so H1 CIO is valid: the 5 inputs are one entity. The two largest 'inflows' in get_flows (SYhB...68.5M, dgb1qwuct...60M) are intermediate hops of that same consolidation chain, not independent counterparties. Recent (2020) activity is just 1-DGB marker outputs paired with ~3786 DGB change to single-use witness addresses (e.g. tx 829f98..., 62f5cf...), consistent with a token/ownership-marker or asset-issuance pattern on a P2SH UTXO, not exchange hot-wallet distribution. Attribution: NO entity can be named. get_autotag_tags empty for the address and every counterparty examined; check_exchange=false and is_exchange_address=false. Multi-hop trace_backward (SYhB->SZEjZ->ShMqog and beyond) fans into dozens of unattributed S-prefix P2SH and D-prefix legacy addresses, with known_exchange_pct=0 at every hop. trace_to_exchanges returned an infra error (signal/thread), so taint-to-exchange could not be machine-confirmed, but manual backward tracing showed 0% exchange exposure throughout. H3 fingerprinting gives no match to any documented entity profile (it is a never-spending accumulator, opposite of an exchange hot wallet, and not a single-use deposit address). Conclusion: strong evidence this is a single-entity, large-balance consolidation/cold-storage wallet, but ZERO evidence tying it to any named exchange or service. Returning insufficient_evidence for an entity claim rather than guessing. Recommend operator review as a high-value unattributed whale/treasury cluster; flagging the trace_to_exchanges tool error. 1. get_autotag_tags2. check_exchange3. lookup_address4. get_flows5. get_history6. lookup_address7. lookup_address8. get_autotag_tags9. get_autotag_tags10. get_transaction11. get_transaction12. get_transaction13. get_state_vector14. detect_coinjoin15. trace_backward16. trace_to_exchanges17. trace_backward18. get_autotag_tags19. lookup_address

At Network School a few people asked me why I "switched" from being a Bitcoin holder from 2013-2025 into a Zcash holder today. The short form of my response: 1/ When I was in NYC doing the ChainCode Bitcoin Dev program, I was a Bitcoin maxi. I believed that network effects, "immaculate conception", and engineering prowess of Bitcoin made it untouchable. 2/ I met people working on PayJoin and noticed the whole team used pseudonyms online, and I was very aware of mixer developers going to jail. Privacy in coins felt like a hot topic that I didn't want to go near. 3/ When I saw Naval tweet about Zcash, it was a moment comparable to Elon buying X. I think Naval moved the Overton window on coin privacy like Elon moved it on social media censorship. I saw a high profile person stake his reputation on a freedom and knew that he would take the fallout for others if the government cracked down on that freedom. The rest crystallized for me fairly quickly.

🔐 BIP77: PayJoin v2 (sin servidor) -> el BIP 77 mejora el protocolo PayJoin original -> permitir PayJoin sin servidores intermediarios -> PayJoin rompe una heurística usada en análisis blockchain -> todos los inputs pertenecen al mismo usuario ➤ ¿por qué es importante? -> puede convertirse en un estándar -> para dar mas privacidad a las transacciones de Bitcoin ❌ SIN: CoinJoi, ni mixers, ni coordinación compleja -> (ALT) en la descripción de la foto puedes ver las fuentes del post #PaYJoin #BIP77 @BullBitcoin_

PayJoin v2

ビットコインの技術に詳しくなりたい上級者や、徹底的にプライバシーを守りたいユーザーには「Sparrow Wallet」がおすすめです。マルチシグや各種ハードウェアウォレットとの連携など高度な機能やオプションを備えた多機能なデスクトップ用ウォレットです。今回は、その長所と魅力を解説します。 1. 完全なプライバシー環境を実現 Sparrow Walletは、Umbrelなどで構築した自分自身のフルノードに接続することができます。これにより、ウォレット内のアドレス情報を公開サーバーなど第三者に開示することなく、完全なプライバシーとトラストレスな環境を手に入れられます。 2. マルチシグを直感的に設定できる 複数の秘密鍵を用いてセキュリティを高める「マルチシグ」の作成・運用が非常に直感的です。画面上のスライダーを動かすだけで、2-of-3などの鍵の数や承認に必要な閾値を簡単に設定できます。 また大半のハードウェアウォレットに対応しているため、異なるウォレットを組み合わせた「マルチベンダー・マルチシグ」も容易に実現でき、単一デバイスの脆弱性リスクを排除できます。 3. 消費するUTXOを選択、管理できる トランザクション作成画面の下部には、消費されるUTXO（インプット）と新たに生成されるUTXOおよびお釣り（アウトプット）が視覚的に表示されており、ビットコインのトランザクション構造を学ぶ教材としてピッタリです。 また、使用したくないUTXOの除外も行うことができ、プライバシーを守りたいユーザー向けに最適化されています。 4. Privacyモードでオンチェーン分析を困難に プライバシーを最大化する「Privacy」モードを選択すると、金額やお釣りを自動で分割し、外部からの追跡を困難にするPayjoin風のカモフラージュ・トランザクションを自動で構築してくれます。手動だとミスが起きやすい複雑な処理を安全に自動化できるのは、大きなメリットです。 5. 送金前に「監視者の目線」でトランザクションを確認できる ブロックチェーン解析企業からその送金がどう見えるかを分析する機能も備わっています。送金前に「追跡する側の視点」でトランザクションを確認できるため、意図せずプライバシーを損なうリスクを事前に把握できます。 6. Silent Paymentsなど最先端技術にいち早く対応 多くのウォレットがまだ対応していない最先端の技術へのキャッチアップも迅速です。 最近では、アドレスの再使用を防ぐ技術「Silent Payments」の送受信に対応しました。「sp1」から始まる再利用可能なアドレスを発行でき、プライバシー面を大きく改善できます。 まとめ：オンチェーンの技術とプライバシーを極める最高の教材 Sparrow Walletは、まとまった資産を安全に保管したい人や、ビットコインのトランザクション構造・マルチシグの仕組みを深く学びたい人にとって、これ以上ないウォレットとなります。 セキュリティやプライバシー保護を強化したい方は、ぜひ自前ノードと組み合わせてそのポテンシャルを体感してみてください。 ※Sparrow Walletの偽サイトが確認されています。ダウンロードする際は、ドメインの確認に加え、公式GitHubや公式Xでも必ずダブルチェックを行い、細心の注意を払ってください。

🔒 Bitcoin n’est pas anonyme. C’est public, traçable, et tout ce que tu fais on-chain peut être analysé. La vraie privacy ne consiste pas à disparaître. Elle consiste à réduire les liens entre ton identité, ton réseau, tes habitudes et tes UTXO. Voici les 4 grandes fuites à surveiller — et comment les limiter. ⚡️ 1. Privacy opérationnelle 🥷 Ce que tu révèles par ton comportement. Tu parles de ton stack, tu montres ton hardware wallet, tu postes tes balances, tu affiches tes adresses… À chaque fois, tu augmentes ta surface d’attaque. Comment rester propre : -Ne jamais communiquer publiquement sur ce que tu détiens -Ne pas poster d’adresses, de balances, ni d’infos de stockage -Utiliser un pseudo quand c’est pertinent -Séparer ton identité réelle de tes activités Bitcoin Limiter les informations visibles sur les réseaux sociaux 2. Privacy d’acquisition 💰 Ce que tu révèles quand tu achètes tes BTC. Les exchanges KYC relient souvent ton identité, tes retraits et parfois même tes adresses. Le vrai problème, ce n’est pas seulement l’achat : c’est la création d’un lien durable entre toi et tes coins. Comment rester propre : -Réduire au maximum l’exposition KYC quand c’est possible et légal -Séparer strictement les coins KYC et non-KYC -Ne jamais mélanger des UTXO venant de contextes différents sans y réfléchir -Garder des wallets distincts selon l’usage 3. Privacy réseau et outils 🌐 Ce que ton wallet, ton nœud et ton navigateur révèlent. Si ton wallet interroge un tiers, ce tiers peut apprendre ton IP, tes adresses et ton comportement. Si tu ne maîtrises pas ton environnement réseau, tu laisses fuiter plus que tu ne crois. Comment rester propre : -Utiliser des wallets sérieux et open source -Faire tourner ton propre nœud quand c’est possible -Passer par Tor ou un montage réseau adapté -Éviter de coller tes clés publiques ou tes adresses sur des sites tiers 4. Privacy on-chain ⛓️ Ce que tu laisses sur la blockchain pour toujours. Réutiliser une adresse, regrouper des UTXO ou consolider sans stratégie crée des liens faciles à exploiter. Sur Bitcoin, la mauvaise gestion des sorties est souvent ce qui casse toute la privacy. Comment rester propre : -Ne pas réutiliser d’adresse -Séparer les wallets par usage -Faire du coin control proprement -Cqomprendre que chaque dépense peut reconstruire des liens Outils & techniques utiles : PayJoin → pour brouiller la lecture des paiements Stonewall → pour compliquer l’analyse triviale Silent Payments → pour recevoir sans réutiliser d’adresse visible CoinJoin → selon le contexte et le niveau de risque Le vrai point 💡 La privacy Bitcoin n’est pas une case à cocher. C’est une discipline. Pour la plupart des gens, l’essentiel se joue déjà sur trois plans : -ce qu’ils disent -comment ils achètent -comment ils se connectent La couche on-chain devient vraiment critique dès qu’on bouge des montants importants, qu’on veut éviter les corrélations, ou qu’on vise un niveau de confidentialité plus poussé. Le but n’est pas d’être invisible. Le but est d’être difficile à relier. 🔑

Fuck yeah!!! Así se ve un Payjoin V2. A echarle un ojo a @BullBitcoinES y al tweet citado más abajo.

Maelstrom Bitcoin Grant Program 不是空投、理财或散户补贴，而是 Arthur Hayes 家办 Maelstrom 出资的比特币开源开发者资助计划。从 2024 年 10 月开始，采用 12 个月合约，按月用 BTC 支付，目标是长期支持提升 Bitcoin 扩展性、健壮性和隐私性的底层开源工作。 目前重点资助 4 位开发者： 1）Rkrux：Bitcoin Core 主要做代码审查、钱包、MuSig2、Descriptors 和 PSBT。2025 年他审查了 200 个 PR，写了 1,155 条 review comment，是 Bitcoin Core 里非常活跃的审查者之一。这类工作不显眼，但很关键，因为 Bitcoin Core 的任何 bug 都可能影响节点、钱包甚至共识安全。 2）Stratospher：Bitcoin Core 重点在 validation、P2P 网络和密码学。她主要处理共识关键代码、P2P 隐私、边缘 bug，以及 libsecp256k1 中和 Silent Payments 相关的 DLEQ proof。这些工作偏底层安全，很多 bug 现实中不一定会触发，但提前清理能避免未来形成更大的技术债。 3）Benalleng：Payjoin Payjoin 是一种提升比特币隐私的交易方式。普通链上分析常假设一笔交易里的所有输入都属于付款方，而 Payjoin 让付款方和收款方都能贡献输入，从而打破这个分析假设。它不仅能提升隐私，还有机会改善 coin control，降低交易费用。报告提到 Payjoin 已被 Bull Bitcoin、Cake Wallet 等钱包采用或集成中。 4）Macgyver：Silent Payments Silent Payments 解决的是地址复用问题。收款人可以给出一个 payment code，付款方之后能生成多个地址付款，而收款人不需要在线，也不必反复使用同一个地址。这对比特币隐私很重要，因为地址复用是链上身份关联的主要来源之一。 Bitcoin 能长期运转，不只靠矿工和价格叙事，也靠这些开发者持续做代码审查、协议改进、隐私工具、钱包兼容和安全维护。 https://maelstrom[.]fund/wp-content/uploads/2026/06/Maelstrom-Bitcoin-Grant-Program-Annual-Report-1.pdf

Payjoin V2, ricordati sempre di avere dei Satoshi nella wallet di destinazione!! Super BULL!!

比特币通过静默协议或payjoin协议就能洗干净，根本不需要混币器。

BULL Wallet 6.10 just dropped on iOS & Android. • New onboarding experience • Improved Payjoin privacy • New currency available for deposits • 11 more languages: Arabic, Bulgarian, Bengali, Czech, Greek, Persian, Hindi, Korean, Brazilian Portuguese, Thai, Turkish • Faster support chat • Improved transaction receipts • Real-time balance updates • Smarter backup warnings • Privacy-friendly error reporting • Auto-labels for BOLT11 invoices • New hardware wallet integration • Tons of improvements across swaps, labels, storage, theming, UX & more Safer. Better. Faster. Smoother. More info 👇

Benalleng works on Payjoin Ben’s contributions to the Payjoin project have spanned test coverage expansion and novel test additions, workspace-wide refactors reducing external dependencies, dependency cleanups and alignment. Ben has also helped to overhaul the build infrastructure and hardened the primary Payjoin state machine and API refactors Interesting quote on Payjoin and Bitcoin privacy: "Bitcoin is about game theory and asymmetry. Achieving supermajority adoption of a privacy technology like Payjoin is likely to be extremely challenging and is perhaps not a realistic objective in the short to medium term. However, minority adoption of Payjoin can have a material positive impact on the systemwide privacy properties of the network. A significant impact on privacy can therefore realistically be achieved in the short to medium term. This is why Maelstrom considers Payjoin such an important technology" [3/4]

This is the first grassroots, novel Payjoin cut-through implementation using PDK that we've seen. Huge.