xStocks on TON (buy / sell)

Backed xStocks are jettons on TON. Resolve the jetton master from the public xStocks API, then use the same quote → execute flow as ton-swap, with routing preferences learned from real Omniston behavior.

Critical: USDT is the only working swap pair.
Omniston consistently returns no quote for GRAM (ex. TON) → xStock and xStock → GRAM routes.
All xStock buys and sells must go through USDT. If the user lacks sufficient USDT, buy USDT with TON first (see §Pre-fund USDT below).

Key addresses

Resolve the TON jetton master for an xStock