Return the current order denominations and fixed rate for buying EMC with USDT. allowed_amounts is the exact set of USDT values buy_emc accepts (fixed denominations, not a free range) — pick one of these; min_usdt/max_usdt are its bounds and emc_per_usdt is the rate (EMC you receive = amount_usdt × emc_per_usdt). Call this first to choose a valid amount for buy_emc. Read-only — it neither creates nor changes an order. support_email is the operator contact for manual cases (e.g. an order on aml_hold or a late/mismatched payment).

Open an order to buy EMC with USDT (TRC20) and get back a shared TRON deposit_address plus the EXACT amount_usdt to send. This does NOT move funds: you then transfer that exact figure (it is your order's matching tag) to the deposit address; on confirmed payment, EMC (amount_usdt × rate) is delivered to your address automatically. Keep the returned token and poll get_order_status until 'notified'; to abandon before paying, call cancel_order. One-way — a wrong amount cannot be matched and is NOT refunded. By default each call opens a NEW order; pass a stable idempotency_key to make retries return the same order. Use get_swap_config first to pick a valid amount.

Return the current status of a buy_emc order by its token: the status, the exact amount, the EMC amount and destination address, and the emc_txid once delivered. Use this to poll after buy_emc — status progresses awaiting_payment → confirmed → emc_delivered → notified (done). Read-only; to cancel an unpaid order use cancel_order instead.

Cancel a still-unpaid buy_emc order by its token, expiring it now and freeing its slot ahead of the TTL. Use this only before you pay; once a payment is in flight or confirmed it is too late and this errors. A payment sent after cancellation matches nothing and is NOT refunded. To only inspect an order without changing it, use get_order_status.