TheCryptoDonkey

Shipped toll-booth - L402 middleware that turns any HTTP API into a Lightning paywall. Five backends (Phoenixd, LND, CLN, LNbits, Alby). Three payment rails (Lightning, Cashu, NWC). Runs on Express, Deno, Bun, and Cloudflare Workers. Cashu-only mode means you can gate a serverless API behind payments with zero Lightning infrastructure. Already running in production gating a Valhalla routing engine at routing.trotters.cc. npm install @thecryptodonkey/toll-booth https://github.com/TheCryptoDonkey/toll-booth

Just shipped rendezvous-kit; an open-source library for finding fair meeting points. The problem: every "meet in the middle" tool uses geographic midpoint. That's just a straight line on a map. It ignores roads, terrain, coastlines, everything that actually determines how long it takes to get somewhere. rendezvous-kit uses real routing engines to compute isochrones (reachability zones), intersects them, discovers actual venues inside the overlap via OpenStreetMap, and ranks them by fairness. Three fairness modes: > min_max: nobody travels too long > min_total: group minimises total travel > min_variance: equalise journey times Routing is engine-agnostic; plug in Valhalla, ORS, GraphHopper, or OSRM. Self-host your routing infrastructure with zero API keys. Venue search queries OpenStreetMap's Overpass API. You can point it at your own Overpass instance if you want full control; or use the public endpoint for free. Only runtime dependency is geohash-kit (also ours). Zero third-party dependencies. TypeScript, ESM-only, MIT licensed. Interactive demo with real UK scenarios; cycling in the Lake District, coastal concavity on the Severn Estuary, 5-person tight budgets in Manchester: https://thecryptodonkey.github.io/rendezvous-kit Source: https://github.com/TheCryptoDonkey/rendezvous-kit

Just shipped geohash-kit - a TypeScript library for building location-based Nostr apps. - Multi-precision g-tag ladders for geographic discoverability - REQ filters from coordinates + radius with neighbour ring expansion - Smart polygon coverage — cover any area with compact geohash sets - Parse g-tags from events, find the best precision match - Zero dependencies, 736 tests https://github.com/TheCryptoDonkey/geohash-kit #geohash #nostr #nostrdev #opensource