I’m finalising a diamond-exchange platform and now need the Mac88 API wired in so the core trading features go live. The work centres on three concrete capabilities: • User account management – create, update and disable trader profiles directly through Mac88. • Transaction processing – submit, confirm and reconcile buy/sell orders with reliable error handling. • Market data retrieval – pull real-time price feeds and order-book snapshots to keep the front end current. Authentication will be handled with a simple API-key scheme; I already have the keys ready for a sandbox environment. What I expect from you is clean, well-documented code (Python or Node.js preferred, though I’m flexible) that plugs these endpoints into my existing service layer, plus a brief README so my in-house devs can move everything to production without hand-holding. Unit tests that prove each call works end-to-end will be the yard-stick for acceptance. If you’ve integrated Mac88 or similar trading APIs before, this should be straightforward. Let’s get it done quickly and keep the exchange moving.