TON-token-purchase-script

A production-ready PHP template for selling any TON-network token in a Telegram bot, using Tegro.Money as the fiat acquirer.

Strict types, PDO prepared statements, MD5-signature webhook verification, idempotent crediting, full PHPUnit coverage of the security-critical paths. Drop your bot/token specifics into a thin layer, deploy.

Status: verified against tegro.money/docs/en/ on 2026-05-15. The package itself is generic — the token symbol, currency, and rate provider are all configurable.

---

What this is

A complete, tested example of the payment-receive side of a Telegram-bot purchase flow:

1. The user clicks Buy in your bot. Your bot creates a paylink row (paylinks table) and asks Tegro.Money for a hosted payment URL.
2. The user pays on Tegro.Money's hosted page.
3. Tegro.Money POSTs a signed notification to public/postback.php.
4. This script:
   • verifies the MD5 signature against your TEGRO_SECRET_KEY,
   • atomically claims the paylink so duplicate retries are no-ops,
   • credits the user's token balance in a single DECIMAL-safe UPDATE,
   • notifies the buyer via Telegram.

The bot-side flow (handling /buy, creating paylinks, generating Tegro URLs) is intentionally not in this repo — it varies per project. This script handles only the part that absolutely must be correct under adversarial input.

What is not in this repo

• Bot conversation logic (/start, /buy, button handlers).
• Tegro.Money order-creation client (use a separate HTTP integration).
• A rate provider — TokenRateProvider is an interface; wire it to a DEX, an oracle, or a hardcoded constant for tests.
• Front-end / admin panel.

Install

git clone https://github.com/TegroTON/TON-token-purchase-script.git
cd TON-token-purchase-script
composer install
cp .env.example .env
# fill .env — see "Configuration" below
mysql -u $DB_USER -p $DB_NAME < migrations/001_initial.sql

Requirements:

• PHP 8.2+ with ext-curl, ext-pdo, ext-pdo_mysql, ext-bcmath, ext-json
• MySQL 8 or MariaDB 10.4+
• A Tegro.Money shop with Shop ID, API key, and Secret key from cabinet → Shop → Settings
• A Telegram bot token from @BotFather

Configuration

All secrets live in .env. Never commit it — the supplied .gitignore excludes it.

Variable	What
TELEGRAM_BOT_TOKEN	From @BotFather.
TEGRO_SHOP_ID	Shop ID, visible in Tegro cabinet.
TEGRO_API_KEY	Used to sign outgoing requests (HMAC-SHA256). Not used by this repo directly but kept here for the order-creation side.
TEGRO_SECRET_KEY	Used to verify the incoming MD5 webhook signature. This is the most security-sensitive value in the project.
TOKEN_SYMBOL	Cosmetic — shown in the user's confirmation message ("100 X credited").
TOKEN_CURRENCY	Fiat currency code: RUB, USD, EUR. Default RUB.
MARKUP_PERCENT	Pricing markup as a percentage of the upstream rate. 100 = no markup, 110 = +10%, etc.
DB_DSN / DB_USER / DB_PASSWORD	Standard PDO triple. The DSN must include charset=utf8mb4.
LOG_PATH	Where to append JSON log lines. Use an absolute path outside the web root.

Then in your Tegro.Money cabinet:

Shop → Settings → Notification URL → https://yourdomain.tld/postback.php

Project layout

public/postback.php       Slim entrypoint — wires the container, hands off to Handler.
src/Config/Config.php     Immutable env-loaded config.
src/Signature/            WebhookVerifier + VerifiedNotification DTO.
src/Postback/             Handler + helpers (OrderIdParser, TokenAmountCalculator, TokenRateProvider iface).
src/Repository/           Paylinks + Users (single-statement, prepared, idempotent).
src/Telegram/             Minimal Bot API client (sendMessage).
src/Database/Database.php PDO factory with the safety flags pre-set.
src/Enum/PaymentStatus.php  0..4 enum.
src/Exception/            Domain exceptions.
migrations/001_initial.sql  Tables: users, paylinks (InnoDB, utf8mb4, FK).
tests/                    PHPUnit specs for verifier, parser, calculator, handler.

Wiring TokenRateProvider

The shipped public/postback.php includes a stub that throws on every call — this is deliberate so a misconfigured deploy can't accidentally credit zero tokens. Replace it with something real:

$rates = new class implements TokenRateProvider {
    public function currentRate(): string
    {
        // Return the current fiat-per-token rate as a decimal string.
        // Example: 1 token = 0.05 RUB → return '0.05'.
        return '0.05';
    }
};

For production, plug in your DEX, oracle, or off-chain price feed here. Pricing math is in BCMath, so the rate stays a string end-to-end — no float drift.

Security model

The webhook endpoint is the perimeter. Anyone on the public internet can POST to /postback.php. The script defends with three layers:

1. MD5 signature with your SECRET_KEY. Unsigned or tampered payloads return 403 forbidden before touching the database. See src/Signature/WebhookVerifier.php.
2. Atomic claim. The transition status: 0 → 1 happens in a single conditional UPDATE statement (PaylinkRepository::claimPaid). Duplicate or replayed notifications get a 200 OK no-op.
3. Prepared statements everywhere. order_id is parsed through a strict allowlist regex (^-?[A-Za-z0-9_-]{1,64}$) before it reaches any query. No interpolation.

Run the test suite to see the boundary conditions exercised:

composer test

For vulnerability reports, do not open public issues. Use GitHub Private Vulnerability Reporting. Full policy in SECURITY.md.

Development

composer install
composer phpstan       # static analysis at level 8 + strict rules
composer phpcs         # PSR-12 style check
composer test          # PHPUnit
composer check         # all of the above

See CONTRIBUTING.md for the full contribution flow.

License

MIT — see LICENSE. Take it, ship your bot, send a star if it helped.

Changelog

Versioned semver-style. See Releases for tagged versions.

🌐 Tegro Ecosystem

Part of the open-source Tegro DeFi & Web3 ecosystem on TON:

• 💳 Payments (Tegro Money) — https://tegro.money · API docs
• 🔁 DEX (Tegro Finance) — https://tegro.finance
• 👛 Wallet — https://t.me/TegroMoneyBot
• 💬 Community — https://t.me/TegroMoney
• 🏠 All open-source repos — https://github.com/TegroTON