# SMetaGateway (Smart Meta Gateway)

> Accept USDT on TRON directly into your own wallet. Exact-amount invoice identification, on-chain payment confirmation, accounting records, signed webhooks and a REST API — with zero gateway commission.

- Noncustodial: buyers pay the merchant's own TRON wallet directly; the gateway never holds funds, private keys or seed phrases and never broadcasts transactions.
- Zero gateway commission. TRON network fees and exchange withdrawal fees are separate and still apply.
- Network/token: USDT (TRC20) on TRON, canonical contract TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t.
- Each invoice gets a unique exact payable amount: base price + a disclosed identification adjustment (0.000001–0.009999 USDT below 100 USDT; 0.000001–0.999999 USDT at or above 100 USDT), reserved for 90 days per network, token and receiving address.
- Amounts are decimal strings with up to six fractional digits, stored as exact integer micro-USDT.
- Payment confirmation: the gateway reads TRON mainnet (TronGrid) for confirmed USDT transfers to receiving addresses with open invoices and verifies each against a successful solidified receipt. An exact-amount transfer inside the checkout window confirms the invoice (tx_hash is the on-chain transaction hash); late, reused-amount or ambiguous transfers go to review, never automatic confirmation.

## Docs
- [Documentation](https://smg.sabco24.com/en/docs): Developer guide for SMetaGateway: quick start, authentication, exact amounts, invoices, idempotency, checkout, signed webhooks, errors and integrations.
- [API reference](https://smg.sabco24.com/en/docs/api): Complete list of SMetaGateway REST API endpoints with methods, authentication, parameters, request bodies, responses, schemas and cURL examples.
- [Swagger UI](https://smg.sabco24.com/en/docs/api/swagger): Interactive OpenAPI explorer.
- [Contact support](https://smg.sabco24.com/en/contact): Send a message to the SMetaGateway support team about USDT TRC20 payments, integrations or your account.
- [OpenAPI 3.1 contract](https://smg.sabco24.com/openapi.json): Machine-readable API specification (SMeta Gateway API 0.2.0).
- [Full documentation for LLMs](https://smg.sabco24.com/llms-full.txt): Documentation, endpoints and FAQ in one Markdown file.

## Translations
- [English](https://smg.sabco24.com/en): home, [docs](https://smg.sabco24.com/en/docs), [API reference](https://smg.sabco24.com/en/docs/api)
- [فارسی](https://smg.sabco24.com/fa): home, [docs](https://smg.sabco24.com/fa/docs), [API reference](https://smg.sabco24.com/fa/docs/api)
- [العربية](https://smg.sabco24.com/ar): home, [docs](https://smg.sabco24.com/ar/docs), [API reference](https://smg.sabco24.com/ar/docs/api)
- [简体中文](https://smg.sabco24.com/zh): home, [docs](https://smg.sabco24.com/zh/docs), [API reference](https://smg.sabco24.com/zh/docs/api)
- [Español](https://smg.sabco24.com/es): home, [docs](https://smg.sabco24.com/es/docs), [API reference](https://smg.sabco24.com/es/docs/api)
- [Français](https://smg.sabco24.com/fr): home, [docs](https://smg.sabco24.com/fr/docs), [API reference](https://smg.sabco24.com/fr/docs/api)
- [Русский](https://smg.sabco24.com/ru): home, [docs](https://smg.sabco24.com/ru/docs), [API reference](https://smg.sabco24.com/ru/docs/api)

## Optional
- [WooCommerce plugin preview (does not yet accept live API keys)](https://smg.sabco24.com/woocommerce-smetagateway.zip)
- [Sitemap](https://smg.sabco24.com/sitemap.xml)