No. B02E86 Friday, September 18, 2026 24h to 13:46 UTC

The Nostr Observer

A one-reader daily newspaper

Ranked as NotBiebs and 69 others 543 events through your lens 194 voices
Mobile Custody & Protocols

Ecash Breaches the App Store as Fedimint Hits iOS

Justin announces the launch of Ecash App across iOS, Android, and desktop platforms—bringing transparent Chaumian federation custody to mobile hardware alongside major updates from Amethyst and Coracle.

The release arrived without fanfare but marks a quiet watershed for decentralized custody: Ecash App is now live in Apple's App Store and Google Play, giving mobile users a native, feature-rich Fedimint wallet on iOS, Android, macOS, and Linux. As developer Justin announced: Big news! Ecash App is now available for iOS! Ecash App is a feature-rich, transparent Fedimint wallet, now available on iOS, Android, Linux, and macOS. (source)

Announcement graphic showing Ecash App, a Fedimint wallet available on iOS, Android, Linux, and macOS.
Ecash App launches on iOS and desktop platforms, delivering federated Chaumian ecash custody to mobile devices.Justin

Ecash App, originally published to Zapstore before clearing mainstream store reviews, packages federation discovery, multi-mint accounting, and Lightning gateway settlements behind a minimalist interface. The expansion to iOS brings Chaumian privacy into Apple's ecosystem without custodial compromises.

The mobile milestone coincided with substantial updates across the native Nostr client ecosystem. Vitor Pamplona released Amethyst v1.16.0, expanding the client's scope while aggressively shedding binary weight: Amethyst v1.16.0: My Fitness, BOLT12 Payments, and a Leaner Core (source). The release integrates BOLT12 offers directly into profile payment rails with automatic fallback to BOLT11, fixes Blossom server uploads, trims roughly 40 MB from distributed builds, and introduces a dedicated training dashboard drawing from both Android Health Connect and kind 1301 telemetry events.

On the web and desktop side, hodlbod published Coracle version 0.6.37 (source). Rebuilt atop Welshman 0.10, the release brings end-to-end encrypted file attachments in direct messages, per-account event caching, social preview tags, and user toggles for link previews to minimize client bandwidth.

Institutions & Custody

Block Applies for Federal Trust Charter to Hold Bitcoin

Jack Dorsey's Block moves to establish "Builders Bank & Trust" under OCC oversight.

In a major institutional development reported by BTC Prague, payments company Block has submitted an application to the U.S. Office of the Comptroller of the Currency (OCC) seeking a national trust bank charter: Block has applied to the OCC for a national trust bank charter. Builders Bank & Trust would custody bitcoin under federal supervision. Uninsured. No deposits, no loans. Still pending approval. (source)

The filing establishes a dedicated, federally supervised custody entity that eschews fractional-reserve lending and traditional deposit operations. The move prompts renewed debate across the network over whether institutional trust charters complement or compromise Bitcoin's foundational peer-to-peer ethos.

Network Readings · As of 13:46 UTC

Fixed readings from Clark Moody Dashboard; not live figures.

MetricReading
Bitcoin Price$76,590
Hash Rate939 EH/s
Immediate Fee1 sat/vB
Block Height967,418
Supply Issued95.64%
Blocks to Halving82,582

Clark Moody (source)

Commerce, Food & Merchant Adoption

Oslo, Norway

Exodus to Sovereign Rails After Swiss Bitcoin Pay Breach

Merchants replace compromised custodial gateways with zero-fee open software.

Following security breaches at Swiss Bitcoin Pay and rising European regulatory scrutiny under MiCA, Sondre and Satoshiconsult have begun migrating Norwegian merchants to sovereign, non-custodial Point-of-Sale setups. Among the first to transition is traditional Oslo rug merchant Rødseth Orientalske Tepper (source).

Sondre explained that switching to open tools eliminates percentage fees while restoring direct on-chain and Lightning custody, pledging to migrate more merchants from the hacked Swiss Bitcoin Pay (0.21% fee the first year, then 1.00% fee after that) to 0.00% fees with accepting bitcoin (source).

Arnhem, Netherlands

Charcuterie Goes Orange in Foodhall Arnhem

Cold cuts, cheeses, and bitterballen join the city's growing Bitcoin economy.

Patrick van der Meijde continues expanding merchant adoption across Arnhem, welcoming Charcuterie & Borrelplanken as the latest food stand to accept sats: Look who I helped accepting bitcoin today! Charcuterie & Borrelplanken is the latest food stand in the Foodhall Arnhem to accept bitcoin. For a few sats she happily serves you some freshly sliced ​​hams, a selection of high-quality cheeses and snack dishes perfect for sharing and savoring. Or the typically Dutch bitterballen.😋 (source)

Charcuterie & Borrelplanken Foodhall Arnhem
Patrick van der Meijde assists Charcuterie & Borrelplanken in Foodhall Arnhem as the stand begins accepting sats for cured meats and Dutch bitterballen.Patrick van der Meijde
The Culinary Wire

From Osaka Sesame Oils to Nameless Cuban Stews

Chefs and home cooks share recipes from the hearth.

Chef Tommy elevated the humble garden root with an intricate, family-style Japanese preparation: Carrots can be cool again right? Family Style. Sesame Roasted Nantes Carrots cooked in Wadaman White Sesame Oil from Osaka, Japan. Saffron carrot hummus with Meyer lemon, parsley and cilantro. Finished with Wadaman dark roasted golden sesame oil and burnt lemon juice. (source)

Across the wire, Bohemia repurposed kitchen leftovers into an unpretentious home-cooked feast (source):

Cuban-inspired dish that has no official name lol
Bohemia's Cuban-inspired staff meal adaptation, layered with beans, olives, and fresh vegetables.Bohemia
Protocol Architecture & Covenants

Why I'm Still Building on Liquid: The Battle for Bitcoin Covenants

In an extensive essay, OceanSlim dissects the September 6 L-BTC minting exploit, evaluates sidechains from Ark to Stacks, and argues why BIP 119 (CTV) and OP_CAT must come to Layer 1.

Addressing the recent multi-million-dollar inflation bug on Blockstream's Liquid Network, OceanSlim published a candid assessment of why developer incentives remain locked onto federated sidechains in the absence of native Bitcoin covenants: On September 6, someone minted roughly 4,000 L-BTC out of thin air and pegged it out for real bitcoin. It was the biggest crypto theft of the year and it happened on the chain I've spent the last year building on. So this is a good moment to write down why I chose Liquid, whether the exploit changes that, and what I actually think about the alternatives. Short version: it doesn't change it. (source)

Reviewing alternative scaling proposals—including Drivechains (BIP 300/301), Rootstock, Stacks, Ark, BitVM rollups, and Taproot Assets—OceanSlim concludes that sidechains are fundamentally workarounds for expressive primitives missing on base-layer Bitcoin. He urges node runners and miners to evaluate BIP 119 CheckTemplateVerify (CTV) and OP_CAT ahead of the March 2027 signaling window: The reason people build on Liquid, Stacks, Rootstock, Citrea, or Alkanes is that Bitcoin won't let them build on Bitcoin. Every one of those is a workaround for a missing primitive. Until covenants land on L1, developers will continue building on the few environments that support them today.

The Classifieds · Offered on Shopstr

Provisions

Costos Extra Virgin Olive Oil 34oz

Sparta, Greece · Direct from grove · $34.00

Produced in small batches from a family olive grove in Sparta, Greece. Extra virgin oil packaged in a 34 fl oz mason jar, ideal for roasting, marinades, and dipping.

Confections

Cretan Wildflower Honey 10oz

Crete, Greece · Raw blossom harvest · $10.00

Sourced directly from Crete, capturing the natural nectar of island wildflowers. Smooth, rich sweetness for yogurt, tea, and cheeses.

Fine Art

REFRAIN — Original Oil on Panel

isolabellart · 40×40cm · Chiavari Coastal Study

Original oil painting completed in May 2026. Captures the twilight view from Chiavari beach with foreground rocks and evening horizon lights.

Diary & The Instrument

Diary & Calendar

Upcoming Gatherings Across the Network

Panama: EINUNDZWANZIG PANAMA meets at Gringo Markt inside Tap Out opposite the Feria, near Tino's Bratwurst stand (10:00–11:30 local time).

Hamburg: BitcoinWalk Hamburg, weekly Saturday outdoor walking meetup for open discussion.

Bonn: Einundzwanzig Bonn monthly community gathering.

The Instrument · 24-Hour Lens Reading

The same 24-hour window read across the network without a web-of-trust lens returned 400 notes. Of those, exactly 4 appeared in your 379 ranked notes (an overlap of 1.0%).

A low overlap reading demonstrates the lens actively filtering the global firehose to reflect the authors and peers you trust.

Epilogue

I would like to die peacefully in my sleep, knowing that I helped create a better world for those who come after me.

Hal Finney (BitcoinTalk Forum, 2013) · Surfaced by Cypherpunk Quotes (source)