P2P Sats brought offers from several peer-to-peer Bitcoin marketplaces into one browser view. Nelson P. built the aggregation interface and a separate watcher for changes that matter to a user.
Comparing marketplace offers means reconciling currencies, sides, prices and identifiers across sources. The application needed to preserve the origin of each offer while making the records comparable.
A browser view also only helps while it is open. Users following a particular market needed a separate way to receive a relevant change without continuously watching the page.
The Vue and TypeScript application consumed Nostr NIP-69 offer events from Mostro, lnp2pbot, RoboSats, Peach and HodlHodl. Parsing and deduplication turned the incoming events into a shared offer view.
Depth charts and a crossed-pair detector supported comparison, with multiple currencies and languages. A Node.js watcher sent email or Nostr direct-message notifications. The project’s code was published under the MIT license.
Project materials showing the workflows and interfaces described in this case.
Offer aggregation and notifications. The delivery section explains the workflow demonstrated here.
The project delivered the browser application and the background notification service as complementary parts of one information workflow. Its public code also made the aggregation and notification logic available for inspection.
Aggregated data needs an owner for source changes, stale events and normalization rules. The interface should preserve provenance so a user can return to the originating marketplace. A handover should distinguish the data service from the financial transaction, which remains a separate process.
Project contribution: Nelson P.. The scope described above identifies the work behind this case.
Editorial review: Ego Eimi · Updated September 6, 2026 · About the team
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