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Amethyst enables offline Bitcoin via Cashu

Sunday, June 28, 2026 · from 3 podcasts
  • Amethyst now lets users send and receive Bitcoin offline using Cashu, bypassing Lightning’s uptime requirement.
  • NIP-61 embeds payment proofs in Nostr events for instant finality and mobile efficiency.
  • Agora and Mostro harden privacy with on-chain Bitcoin and encrypted trade metadata.

Amethyst’s latest update changes the game for mobile Bitcoin payments. Version 1.12.0 integrates Cashu wallets and NIP-61 NutZaps, allowing users to zap offline recipients by embedding eCash tokens directly in Nostr events. This sidesteps Lightning’s need for constant connectivity - no more failed zaps when the recipient is offline.

The architecture is lean: recipients redeem eCash on their own schedule, while clients gain instant payment confirmation without running a full node. The trade-off is custody risk at Cashu mints, but for micropayments in hostile environments, speed and reliability win. Six days after the Nostr Compass podcast highlighted Citrine’s implementation of Negentropy to slash mobile sync costs, Amethyst shipped a user-facing leap in payment resilience.

"NutZaps move the cryptographic proof of payment directly into a Nostr event."

- Host, Nostr Compass

Meanwhile, Agora - Soapbox’s crowdfunding tool for activists - is betting on on-chain Bitcoin and BIP 352 silent payments to avoid custodial traps. As Derek Ross explained on Ungovernable Misfits, the team rejected Lightning not for ideological reasons, but because many wallets introduce centralization points. By deriving Bitcoin keys from Nostr identities, Agora ensures activists receive funds without a paper trail or third-party approval.

Privacy hardening is spreading. Mostro 0.13.0 now wraps all trade metadata in NIP-44 encrypted envelopes and Kind 14 messages, shielding traders from relay-level surveillance. A recent emergency patch in Cignet fixed a critical vulnerability that could have allowed attackers to forge admin commands via gift-wrapped messages. The ecosystem is shifting from public-by-default to structurally dark.

"Infrastructure is only as strong as its weakest link."

- Derek Ross, Ungovernable Misfits

The pattern is clear: Nostr is maturing beyond social media into a private, resilient financial layer. Offline payments, efficient sync, and end-to-end encrypted trades aren’t edge cases - they’re the baseline.

Source Intelligence

- Deep dive into what was said in the episodes

Nostr Evangelism with Derek Ross | FREEDOM TECH FRIDAY 45Jun 27

  • Derek Ross left centralized platforms like Google Plus and Twitter to fully embrace Nostr, advocating for user-controlled social media after experiencing the loss of his Android community due to Google's shifting priorities.
  • Derek Ross initially urged Nostr users to 'march off Twitter' and delete their accounts, but later returned to X (formerly Twitter) alongside others like Odell to more effectively evangelize Nostr to a wider audience.
  • Derek Ross identifies user addiction to existing platforms and a reluctance to rebuild social graphs as key barriers to Nostr adoption, acknowledging that many users, even within the Bitcoin community, prioritize ease of use over ideological decentralization.
  • Soapbox builds open-source tools for the decentralized web, focusing on Bitcoin and Nostr, with a mission to counteract the global trend of a splitting web into 'free and open' versus 'KYC and controlled' versions.
  • Alex Gleason, Soapbox's founder, transitioned from being CTO of Donald Trump's Truth Social to building on Nostr, recognizing its importance for a truly open ecosystem, and now Soapbox receives funding from Jack Dorsey's Start Small organization.
  • Shakespeare, a Soapbox 'vibe coding' tool, enables users to build Noster and Bitcoin-centric websites with AI, allowing local code storage, choice of AI models, and deployment across various platforms, distinguishing itself through its open-source nature and user freedom.
  • Agora, a Soapbox project, is a crowdfunding application for human rights activists globally, built on Bitcoin and Nostr, enabling unstoppable fundraising for campaigns in oppressive regimes by utilizing on-chain Bitcoin payments and BIP 352 silent payments.
  • Agora leverages a web of trust and social consensus for campaign verification, allowing reputable individuals and Bitcoin circular economies to verify campaigns without a centralized authority.
  • Agora prioritizes on-chain Bitcoin transactions for funding human rights activists to ensure true permissionless access without custodial intermediaries, recognizing the need for frictionless, censorship-resistant money in high-risk environments.
  • Derek Ross expressed interest in integrating Lightning or Arc for microtransactions in Agora's future, acknowledging the limitations of on-chain fees for small donations while prioritizing current ease of use and censorship resistance.
Also from this episode: (1)

Startups (1)

  • Soapbox's Shakespeare project does not generate profit; its sustainability relies on the company's broader goal to establish a foundation and secure funding to continue developing Freedom Tech software.

Nostr Compass Podcast #27Jun 25

  • Amethyst version 1.12.0 merged 170 PRs, integrating Cashu wallets (NIP 60) and zaps (NIP 61) alongside Lightning, on-chain, and Nostr Wallet Connect in a unified payment UI.
  • Kama's trade room was redesigned around the purse seat with color-coded prompts, and the money path was hardened with new guard rails.
  • Zapbook is a Nostr-native social reading app built on Marmot, allowing private circles to track reading progress and send zaps as rewards.
  • Zeus 13.1.0 RC lets users pay via Nostr Wallet Connect on iOS, generates C-Link offers for any account, and allows opting out of publishing kind 9735 zap receipts.
  • NIP61 NutZaps deliver Cashu eCash tokens directly inside Nostr events, allowing offline recipients to redeem later without Lightning infrastructure.
  • The Blossom specification merged a PR to broaden the bud definition, bringing BAT10 URI scheme and BAT8 local cache convention under canonical numbering.
  • NIP46 signer protocol has an open PR for adding optional client metadata (name, URL, icon) to the connection request for clearer signer pairing screens.
  • NIP29 group chat spec is being refined with new PRs for group banners, one-shot invite codes, message pinning, and role-based access control.
Also from this episode: (6)

Digital Sovereignty (1)

  • Mostro version 0.13.0 moved trade communication to encrypted NIP44 direct messages and introduced mandatory anti-abuse bonds configured by the operator.

Safety (1)

  • Cygnet version 1.11.0 patched a severe vulnerability where an attacker could forge a gift wrap event and execute any kill-switch command.

Coding (1)

  • Klave version 1.0, an iOS remote signer using NIP46, is now available on the Apple App Store and supports push notifications when the app is closed.

AI Infrastructure (2)

  • Citrine version 3 implemented NIP77 set reconciliation (NECK entropy) to synchronize missing events from multiple relays efficiently and supports pausing sync on restricted networks.
  • NIP77 set reconciliation reduces sync costs to O(D log N), proportional to the symmetric difference between two relays, rather than O(N) for a naive full dump.

Privacy (1)

  • FIPS release candidate 0.4.0 added Nym MixNet support and LAN discovery, maintains wire compatibility with version 0.3, and hardened its FMP/FSP rekey logic.

Stepping Out of the ShadowsJun 22

Also from this episode: (9)

Psychology (3)

  • Shepherd argues that people, particularly women, stay in others' shadows for social acceptance, citing a 'pretty girl and ugly girl' dynamic where the latter often accepts a lesser status to maintain friendships.
  • Shepherd claims living in someone else’s shadow prevents true self-discovery and that stepping into your own light reveals inherent value and talents. He says this requires separating from groups that diminish you.
  • Shepherd identifies himself as an introvert and argues this mindset is beneficial, freeing him from needing validation from friends and forcing him to never stand in anyone's shadow.

Society (1)

  • Shepherd urges listeners to prepare for potential crises, advising them to gather at least a month's worth of provisions including non-perishable food, water, batteries, first aid kits, and generators.

War (1)

  • Shepherd asserts we are in a volatile period akin to war, citing Vladimir Putin’s situation and a potential NATO vote on Ukraine next week. He links this to COVID-19, which he says was used to push unknown vaccines.

Politics (1)

  • Shepherd argues systemic issues are worsening, including high living costs where food now rivals car payments. He criticizes government programs like the ACP for subsidizing internet over essentials like food and rent.

Culture (3)

  • Shepherd praises Ben & Jerry's for a Fourth of July tweet stating America celebrates independence on stolen land that should be returned to Indigenous people and acknowledges stolen labor.
  • Shepherd applauds the company for speaking out independently, not during the peak of the Black Lives Matter movement after George Floyd's death. He vows to support them by buying their ice cream.
  • Shepherd contrasts U.S. reluctance to acknowledge stolen land with Australia, where he says there's a practice of thanking Indigenous peoples for allowing others to live and work on their land.