From a certain perspective, the Keychat Browser comes with a built-in Nostr ID and a “Lightning wallet.” View quoted note →

View quoted note →

In addition, since the Keychat wallet can pay Lightning invoices for all Mini Apps, users will use the Keychat wallet directly when zapping. View quoted note →

retty easy to get, right? View quoted note →

IDs (Public Key) + Wallet (Bitcoin) + Browser (Mini Apps) + Chat

If you log in to Keychat with your Nostr ID, when someone sends a Nostr DM (NIP-4 or NIP-17) to this ID, Keychat can receive the messages as well as message notifications. However, Keychat cannot reply to NIP-4 DMs, but it can reply to NIP-17 DMs. You could think of this feature as a kind of message notification for Nostr DMs, but it’s not something we emphasize as a core feature. View quoted note →

Another explanation of how Ark works

Neha's Writings

Neha Narula

Ark 101 https://medium.com/@saravananmani_/ark-101-0d64cfe9378f View quoted note →

If you come across this note in the Keychat browser, be sure to open the link and zap 21 sats. Unlock the content and discover a different internet experience.

Fanfares

What am I working on? Juicy details I've never revealed before publicly. Beli...

21 sats - What am I working on? Juicy details I've never revealed before publicly. Believe me, it's worth 21 sats. ⚡

From open protocols to closed platforms, and then back to open protocols. View quoted note →

Keychat adopts two elements from Nostr’s design: using public key as ID and the relay model. View quoted note →

Currently, Keychat users can [manually] invoke the Keychat Wallet within the chat to send BTC in chat rooms, and they can also [automatically] use the Keychat Wallet to pay for message stamps. This payment process for stamps is automated and programmatic, requiring no manual action from the user. In the browser, Keychat users can [manually] use the Keychat Wallet to pay lightning invoices for Mini Apps, but they are not yet able to [automatically] perform micropayments with the Keychat Wallet. View quoted note →

Here’s our simplified way of looking at it: In the beginning, RSS was used to distribute and aggregate content from different websites. Content creators usually had their own independent sites to publish content, while readers typically didn’t have websites of their own for publishing. Then Twitter came along — all registered users could post content directly to Twitter’s servers, and its built‑in follow system effectively replaced RSS. With Nostr, users publish content to different relays, and its follow mechanism works more like RSS. View quoted note →

The most universal element in Nostr is the public key as the ID, followed by the relay model, and then the RSS mechanism. View quoted note →

For newly received Ark BTC, the user also faces the risk that the previous owner and the Ark service provider could collude to double spend it, which is similar to Spark BTC. The user can refresh the received Ark BTC to eliminate this counterparty risk, which Spark cannot do. After refreshing, the counterparty risk for the Ark BTC is: *“if the user stays offline for too long (approximately one month) and their VTXO expires, the service provider may be able to take control of it.”* View quoted note →

How would you rate this user experience? View quoted note →

View quoted note →

In addition, Mini Apps inside the Keychat browser can use the Keychat wallet to make Lightning payments. View quoted note →

HTTP 402 "Payment Required"

GitHub

nuts/24.md at main · cashubtc/nuts

Cashu protocol specifications https://cashubtc.github.io/nuts/ - cashubtc/nuts

x402 - Payment Required

x402 is the internet's payment standard for agentic payments at scale.

L402

L402 is an http-based payment flow for MCP, AI Agents, and more.

Keychat uses Bitcoin ecash as stamps and Nostr relays as post offices. Senders send messages stamped with Bitcoin ecash to Nostr relays. The Nostr relays collect the Bitcoin ecash, then deliver messages to receivers. View quoted note →

Iris requests the Keychat browser to sign, which then requests Amber to perform the signing. View quoted note →