The working day
20 authored assignments use three stages: inspect, decide and hand off. The API persists completion and Trims; a screen animation doesn’t award progress.
TECHNICAL WALKTHROUGH
Inside Trimmy.
Familiar app actions.
The engineering underneath.
The player couldn’t load. Open the video directly.
4:41 · 1080p at 60fps · English captions available
Download video ↓Video added . Narration generated with ElevenLabs.
WRITTEN WALKTHROUGH
One game.
Two trading modes.
01
→Flutter app
Onboarding, Desk, Market and Career.
02
→Trimmy API
Fastify + TypeScript. Server-owned order and game checks.
03
State & Solana
PostgreSQL for progression. Solana for wallet and trade confirmation.
Market context
Tokens.xyz supplies discovery and price data. Solana RPC supplies wallet balances and public token accounts. Missing provider data isn’t invented.
Identity & wallet
Privy handles sign-in and the embedded wallet. Guests explicitly choose guest mode for paper activity. Real orders require the user’s authenticated wallet.
A reviewed order
An order uses a specific issuer and Solana mint. Jupiter prepares a candidate transaction. The API reviews the message and terms, then verifies the signed bytes after the user approves. Available assets depend on admission checks, market status and executable routes.
What these videos show
The product demo includes an actual recorded $2 Apple/AAPLx purchase. This technical film combines app captures with labelled mechanism diagrams. Practice balances remain separate from wallet funds; the recorded order is an example, not a promise of current pricing or availability.