About the project

Why

In P2P and OTC deals people send USDT to addresses they know nothing about. Professional screening tools are built for compliance teams: expensive and complex. The goal is a clear verdict in one click and a PDF you can attach to the deal.

How it works

• Next.js 16 (App Router, React 19, server components), hosted on Vercel.
• TRON data from the public TronGrid API: balances, up to 400 latest USDT transfers, counterparties.
• The USDT freeze is read directly from the USDT-TRC20 contract (isBlackListed).
• Sanctions: the official OFAC SDN export and the OpenSanctions API — lists of many countries, entity attribution and recorded relationships.
• Risk engine: each finding has a weight (90 / 45 / 15 / 0); the score is the most serious finding plus 15% of the rest; levels 0–34, 35–69, 70–100.
• PDF report built with @react-pdf/renderer and a SHA-256 checksum; connection map with Cytoscape.js; UI and PDF in English and Russian.
• Optional account (Supabase): saved reports and daily address monitoring.

Key decisions

• The engine is language-agnostic: it returns finding codes and the text comes from dictionaries — the same for the site and the PDF.
• If a data source fails, the report says “incomplete check” instead of a false “low risk”.
• Every finding is explained in plain language with advice on what to do.
• People and companies are shown only from official lists, with a note that an address match is not proof of guilt.