mystars-faas

Official Python SDK for the MyStars FaaS API — buy Telegram Stars & Premium for any @username, paid in TON or USDT (TON).

Sync + async clients, exact-Decimal money, typed errors, automatic retries + idempotency, webhook verification, a retail-markup calculator, and dependency-free on-chain payload builders.

Compatible with FaaS API v1.11.0. Requires Python ≥ 3.9. Only runtime dependency: httpx.

📖 Full interactive API reference: mystars.tg/docs. SDK method/function reference: api-python.md. Changelog: CHANGELOG.md.

Install

pip install mystars-faas

Keys are issued in the MyStars Telegram bot — open @my_stars_tg_bot, tap API access, copy your X-Api-Key.

Runnable examples live in examples/ (quickstart + webhook receiver).

Quick start

The client reads your key from the environment. Set it before running — export MYSTARS_API_KEY=faas_.... If you keep keys in a .env file, load it yourself (e.g. with python-dotenv — load_dotenv()); it is not a dependency of this SDK, so os.environ["MYSTARS_API_KEY"] alone won't read a .env.

import os
from mystars_faas import MyStarsClient

client = MyStarsClient.production(os.environ["MYSTARS_API_KEY"])

quote = client.get_pricing(type="stars", quantity=100, payment_currency="ton")
print("pay", quote.amount, quote.currency)

check = client.check_recipient("durov", type="stars")
if not check.eligible:
    raise SystemExit(check.telegram_message)
# check.indeterminate is True when the check couldn't decide and failed open, so
# `eligible` is a default, not a measurement. Treat it as "unknown", never as "yes":
# ordering is still safe (the order re-checks authoritatively), but don't tell the
# buyer the recipient is confirmed.

order = client.create_order(            # an Idempotency-Key is generated + reused on retry
    type="stars", recipient="durov", quantity=100,
    callback_url="https://your-app.example.com/webhooks/mystars",
)
# Pay order.payment.amount to order.payment.pay_to_address with the comment order.payment.memo.
print(order.payment)

final = client.wait_for_order(order.order_id, on_update=lambda o: print("status:", o.status))
print("done:", final.status, final.purchase_tx)

Async

from mystars_faas import AsyncMyStarsClient

async with AsyncMyStarsClient.production(key) as client:
    quote = await client.get_pricing(type="premium", months=3, payment_currency="usdt_ton")
    async for order in client.aiter_orders(status="delivered"):
        ...

Webhooks

from mystars_faas import WebhookVerifier

verifier = WebhookVerifier(WEBHOOK_SECRET)
event = verifier.verify(raw_body, request.headers["X-Faas-Signature"])  # raises on bad signature
# event.order_id, event.status — dedup on order_id (delivery is at-least-once)

Handles the 24h "current,previous" rotation header automatically. FastAPI / Flask route factories live in mystars_faas.integrations.fastapi / .flask (install mystars-faas[fastapi] / [flask]).

Your own retail markup

from mystars_faas import apply_retail_markup

quote = client.get_pricing(type="stars", quantity=100, payment_currency="usdt_ton")
retail = apply_retail_markup(quote, margin_pct=15, pass_through_processing_fee=True)
print(retail.total)   # decimal string — exact (computed in Decimal), two-stage cent-ceil
print(retail.profit)  # decimal string — your gross margin

All RetailQuote money fields (total, profit, subtotal, …) are returned as decimal strings, not Decimal. For a usdt_ton quote, the markup needs the fee breakdown — if the quote came back with fee=None (a cold-FX /v1/pricing row), apply_retail_markup raises MyStarsValidationError; re-quote get_pricing(...) to obtain the fee block first.

Pay an order (non-custodial)

order.payment (a PaymentInstruction) is on the create_order result (CreateOrderResult). An Order from get_order / wait_for_order has no .payment — read amount_ton, payment_tx, and purchase_tx there instead.

from mystars_faas import build_payment_request

req = build_payment_request(order.payment)   # order = the create_order(...) result
print(req.ton_deeplink)        # ton://transfer/... (TON only)
print(req.ton_connect[0])      # ton_connect is a list[TonConnectMessage] (one entry for TON)

Holds no keys. Errors are typed subclasses of MyStarsAPIError (RecipientIneligibleError, RateLimitedError, …); the client retries transient failures (network, timeout, 502/503/504, 500, general 429 — honoring Retry-After, including the HTTP-date form) automatically and idempotency-safely. A response body larger than 4 MB is rejected (response_too_large) instead of being buffered whole.

Errors

UnauthorizedError and ForbiddenError are exported aliases of AuthenticationError / PermissionDeniedError so code written against the TypeScript SDK's names catches the same error.

CLI

mystars-faas --api-key "$MYSTARS_API_KEY" pricing --type stars --quantity 100 --currency ton
mystars-faas orders-create --type stars --recipient durov --quantity 100 --pay

# Verify a webhook offline. Prefer the env var — a --secret on argv is visible in `ps`.
export MYSTARS_WEBHOOK_SECRET="…"
mystars-faas webhook-verify --body "$RAW_BODY" --signature "$X_FAAS_SIGNATURE"

webhook-verify reads the secret from MYSTARS_WEBHOOK_SECRET (preferred) or --secret; the env var wins when both are set, because a command-line --secret leaks via the process list and shell history.