diff --git a/.gitignore b/.gitignore
index 7e968df..9abeaf6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -37,3 +37,7 @@ systests/
 dist/
 build/
 *.egg-info/
+uv.lock
+
+#docs
+*-docs/
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 07e5604..71b9d2e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -24,6 +24,34 @@ and this project uses [Calendar Versioning](https://calver.org/) (`YYYY.MINOR.MI
 - Updated `DEVICE_INFO` fingerprint: Tonkeeper `appVersion` -> `26.05.0`.
 - Updated client docstrings and purchase examples to document all supported payment methods.
 
+### Renamed — TON -> GRAM (ex TON)
+
+The TON blockchain has been rebranded to **GRAM (ex TON)**. All identifiers, messages, and documentation have been updated accordingly.
+
+**Public API**
+
+- `FragmentClient.topup_ton()` → `topup_gram()`
+- `PaymentMethod.TON` → `PaymentMethod.GRAM`
+- `PaymentMethod.USDT_TON` → `PaymentMethod.USDT_GRAM`
+- `WalletInfo.ton_balance` → `WalletInfo.gram_balance`
+
+**Constants**
+
+- `TON_TOPUP_MIN` / `TON_TOPUP_MAX` → `GRAM_TOPUP_MIN` / `GRAM_TOPUP_MAX`
+- `MIN_TON_BALANCE` → `MIN_GRAM_BALANCE`
+- `USDT_TON_MASTER_ADDRESS` → `USDT_GRAM_MASTER_ADDRESS`
+
+**Exceptions**
+
+- `ConfigurationError.INVALID_TON_AMOUNT` → `INVALID_GRAM_AMOUNT`
+- `WalletError.LOW_TON_BALANCE` → `LOW_GRAM_BALANCE`
+- `WalletError.TON_BALANCE_CHECK_FAILED` → `GRAM_BALANCE_CHECK_FAILED`
+
+**Internals**
+
+- `pyfragment/core/constants/ton.py` → `gram.py`
+- `check_ton_payment_balance()` → `check_gram_payment_balance()`
+
 ---
 
 ## [2026.3.1] — 2026-05-29
@@ -239,6 +267,8 @@ and this project uses [Calendar Versioning](https://calver.org/) (`YYYY.MINOR.MI
 - `py.typed` marker — full PEP 561 typing support for type-checkers
 - `__repr__` on all result types for readable debug output
 
+[2026.3.2]: https://github.com/bohd4nx/pyfragment/releases/tag/v2026.3.2
+[2026.3.1]: https://github.com/bohd4nx/pyfragment/releases/tag/v2026.3.1
 [2026.3.0]: https://github.com/bohd4nx/pyfragment/releases/tag/v2026.3.0
 [2026.2.3]: https://github.com/bohd4nx/pyfragment/releases/tag/v2026.2.3
 [2026.2.2]: https://github.com/bohd4nx/pyfragment/releases/tag/v2026.2.2
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 581a776..991a561 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -30,7 +30,7 @@ pyfragment/
   client.py           — FragmentClient (public entry point)
   core/               — transport, cookies, constants
   domains/            — one package per feature domain
-    ads/              — recharge_ads, topup_ton
+    ads/              — recharge_ads, topup_gram
     anonymous_numbers/— buy_number, manage_number
     giveaways/        — giveaway_stars, giveaway_premium
     marketplace/      — search_usernames, search_numbers, search_gifts
diff --git a/README.md b/README.md
index 5d8fdb9..e2be12e 100644
--- a/README.md
+++ b/README.md
@@ -10,10 +10,10 @@
 [![License](https://img.shields.io/github/license/bohd4nx/pyfragment?style=flat&color=blue&label=License)](LICENSE)
 
 Async Python client for the **[Fragment](https://fragment.com)** marketplace API.
-Buy Stars & Premium, run giveaways, top up TON and Ads balances,
+Buy Stars & Premium, run giveaways, top up GRAM (ex TON) and Ads balances,
 manage anonymous numbers, and search Fragment listings.
 
-**[Documentation](https://bohd4nx.gitbook.io/pyfragment/)** · **[Examples](https://github.com/bohd4nx/pyfragment/tree/master/examples)** · **[Changelog](CHANGELOG.md)** · **[Donate TON](https://app.tonkeeper.com/transfer/UQCppfw5DxWgdVHf3zkmZS8k1mt9oAUYxQLwq2fz3nhO8No5)**
+**[Documentation](https://bohd4nx.gitbook.io/pyfragment/)** · **[Examples](https://github.com/bohd4nx/pyfragment/tree/master/examples)** · **[Changelog](CHANGELOG.md)** · **[Donate GRAM](https://app.tonkeeper.com/transfer/UQCppfw5DxWgdVHf3zkmZS8k1mt9oAUYxQLwq2fz3nhO8No5)**
 
 </div>
 
@@ -53,11 +53,11 @@ async def main() -> None:
         },
     ) as client:
         wallet = await client.get_wallet()
-        print(f"TON: {wallet.ton_balance} | USDT: {wallet.usdt_balance}")
+        print(f"GRAM: {wallet.gram_balance} | USDT: {wallet.usdt_balance}")
 
         recipient = "https://t.me/username"  # also: @username, username
 
-        stars = await client.purchase_stars(recipient, amount=500, payment_method=PaymentMethod.USDT_TON)
+        stars = await client.purchase_stars(recipient, amount=500, payment_method=PaymentMethod.USDT_GRAM)
         if stars.auto_paid:
             print(f"Sent {stars.amount} Stars to {stars.username} | tx: {stars.transaction_id}")
         else:
@@ -67,7 +67,7 @@ async def main() -> None:
             print(f"Expires:   {stars.payment_expires_at}")
             print(f"QR link:   {stars.payment_qr_link}")
 
-        premium = await client.purchase_premium(recipient, months=6, payment_method=PaymentMethod.TON)
+        premium = await client.purchase_premium(recipient, months=6, payment_method=PaymentMethod.GRAM)
         print(f"Sent Premium {premium.amount}m to {premium.username} | tx: {premium.transaction_id}")
 
 
@@ -80,7 +80,7 @@ asyncio.run(main())
 
 | Parameter        | Type          | Default  | Description                                                 |
 | ---------------- | ------------- | -------- | ----------------------------------------------------------- |
-| `seed`           | `str`         | —        | 12- or 24-word TON wallet mnemonic                          |
+| `seed`           | `str`         | —        | 12- or 24-word GRAM (ex TON) wallet mnemonic                |
 | `api_key`        | `str`         | —        | Tonapi key from [tonconsole.com](https://tonconsole.com)    |
 | `cookies`        | `dict \| str` | —        | Fragment session cookies                                    |
 | `wallet_version` | `str`         | `"V5R1"` | `"V4R2"` or `"V5R1"` — also accepts `WalletVersion` literal |
@@ -92,7 +92,7 @@ asyncio.run(main())
 
 ### Fragment cookies
 
-Log in to [fragment.com](https://fragment.com) and connect your TON wallet.
+Log in to [fragment.com](https://fragment.com) and connect your GRAM (ex TON) wallet.
 
 **Automatically** (recommended) — reads directly from your browser, no extension needed:
 
@@ -118,7 +118,7 @@ Generate at [tonconsole.com](https://tonconsole.com).
 
 ### Seed phrase
 
-12- or 24-word mnemonic from your TON wallet (**Tonkeeper → Settings → Backup**). Never share it.
+12- or 24-word mnemonic from your GRAM (ex TON) wallet (**Tonkeeper → Settings → Backup**). Never share it.
 
 ---
 
@@ -143,7 +143,7 @@ All exceptions inherit from `FragmentError`:
 from pyfragment import (
     ConfigurationError,   # invalid arguments (amount, months, payment_method…)
     UserNotFoundError,    # recipient not found on Fragment
-    WalletError,          # insufficient TON or USDT balance
+    WalletError,          # insufficient GRAM (ex TON) or USDT balance
     TransactionError,     # broadcast failed, duplicate seqno, invalid payload
     FragmentAPIError,     # Fragment API returned an error response
     FragmentPageError,    # page fetch or hash extraction failed
diff --git a/SECURITY.md b/SECURITY.md
index 475c2e7..1800853 100644
--- a/SECURITY.md
+++ b/SECURITY.md
@@ -16,4 +16,4 @@ You will receive a response within 72 hours. Once the fix is released, the advis
 
 ## Scope
 
-This library handles sensitive credentials (TON seed phrases, Fragment session cookies, Tonapi keys). Please treat any finding that could expose or misuse these credentials as high severity.
+This library handles sensitive credentials (GRAM (ex TON) seed phrases, Fragment session cookies, Tonapi keys). Please treat any finding that could expose or misuse these credentials as high severity.
diff --git a/examples/client/wallet_info.py b/examples/client/wallet_info.py
index 7631288..1b0de85 100644
--- a/examples/client/wallet_info.py
+++ b/examples/client/wallet_info.py
@@ -1,5 +1,5 @@
 """
-Example: fetch wallet address, state, and separate TON/USDT balances.
+Example: fetch wallet address, state, and separate GRAM (ex TON)/USDT balances.
 
 Cookies can be passed as a dict or as a JSON string.
 wallet_version defaults to "V5R1" — change to "V4R2" for older wallets.
@@ -34,7 +34,7 @@ async def main() -> None:
         wallet = await client.get_wallet()
         print(f"Address: {wallet.address}")
         print(f"State:   {wallet.state}")
-        print(f"Balance: {wallet.ton_balance} TON")
+        print(f"Balance: {wallet.gram_balance} GRAM (ex TON)")
         print(f"Balance: {wallet.usdt_balance} USDT")
 
 
diff --git a/examples/purchase/recharge_ads_balance.py b/examples/purchase/recharge_ads_balance.py
index 7dc0162..a3fc005 100644
--- a/examples/purchase/recharge_ads_balance.py
+++ b/examples/purchase/recharge_ads_balance.py
@@ -1,8 +1,8 @@
 """
-Example: recharge your own Telegram Ads account with TON.
+Example: recharge your own Telegram Ads account with GRAM (ex TON).
 
-Amount must be an integer between 1 and 1 000 000 000 TON.
-Your wallet must satisfy the current minimum TON threshold and transaction cost.
+Amount must be an integer between 1 and 1 000 000 000 GRAM (ex TON).
+Your wallet must satisfy the current minimum GRAM (ex TON) threshold and transaction cost.
 """
 
 import asyncio
@@ -29,7 +29,7 @@ COOKIES = {
 }
 
 ACCOUNT = "@mychannel"  # channel or bot username linked to your Telegram Ads account
-AMOUNT = 10  # 1–1 000 000 000 TON
+AMOUNT = 10  # 1–1 000 000 000 GRAM (ex TON)
 
 
 async def main() -> None:
@@ -43,7 +43,7 @@ async def main() -> None:
             print(f"Invalid argument: {e}")
             return
 
-    print(f"{result.amount} TON recharged to Ads account {ACCOUNT} | tx: {result.transaction_id}")
+    print(f"{result.amount} GRAM (ex TON) recharged to Ads account {ACCOUNT} | tx: {result.transaction_id}")
 
 
 if __name__ == "__main__":
diff --git a/examples/purchase/run_premium_giveaway.py b/examples/purchase/run_premium_giveaway.py
index 115fa1d..184b518 100644
--- a/examples/purchase/run_premium_giveaway.py
+++ b/examples/purchase/run_premium_giveaway.py
@@ -28,7 +28,7 @@ COOKIES = {
 CHANNEL = "https://t.me/channel"
 WINNERS = 10  # 1–24 000
 MONTHS = 3  # 3, 6 or 12
-PAYMENT_METHOD = PaymentMethod.TON  # TON, USDT_TON, USDT_ETH, USDT_POL, USDC_ETH, USDC_BASE, USDC_POL
+PAYMENT_METHOD = PaymentMethod.GRAM  # GRAM, USDT_GRAM, USDT_ETH, USDT_POL, USDC_ETH, USDC_BASE, USDC_POL
 
 
 async def main() -> None:
diff --git a/examples/purchase/run_stars_giveaway.py b/examples/purchase/run_stars_giveaway.py
index ea4d886..f685069 100644
--- a/examples/purchase/run_stars_giveaway.py
+++ b/examples/purchase/run_stars_giveaway.py
@@ -28,7 +28,7 @@ COOKIES = {
 CHANNEL = "https://t.me/channel"
 WINNERS = 3  # 1–15
 AMOUNT = 1000  # 500–1 000 000 stars per winner
-PAYMENT_METHOD = PaymentMethod.USDT_TON  # TON, USDT_TON, USDT_ETH, USDT_POL, USDC_ETH, USDC_BASE, USDC_POL
+PAYMENT_METHOD = PaymentMethod.USDT_GRAM  # GRAM, USDT_GRAM, USDT_ETH, USDT_POL, USDC_ETH, USDC_BASE, USDC_POL
 
 
 async def main() -> None:
diff --git a/examples/purchase/send_premium.py b/examples/purchase/send_premium.py
index f215f45..c02d02b 100644
--- a/examples/purchase/send_premium.py
+++ b/examples/purchase/send_premium.py
@@ -27,7 +27,7 @@ COOKIES = {
 
 USERNAME = "https://t.me/username"
 MONTHS = 3  # 3, 6 or 12
-PAYMENT_METHOD = PaymentMethod.TON  # TON, USDT_TON, USDT_ETH, USDT_POL, USDC_ETH, USDC_BASE, USDC_POL
+PAYMENT_METHOD = PaymentMethod.GRAM  # GRAM, USDT_GRAM, USDT_ETH, USDT_POL, USDC_ETH, USDC_BASE, USDC_POL
 
 
 async def main() -> None:
diff --git a/examples/purchase/send_stars.py b/examples/purchase/send_stars.py
index f490e65..2dacdc6 100644
--- a/examples/purchase/send_stars.py
+++ b/examples/purchase/send_stars.py
@@ -27,7 +27,7 @@ COOKIES = {
 
 USERNAME = "https://t.me/username"
 AMOUNT = 500  # 50–10 000 000 stars
-PAYMENT_METHOD = PaymentMethod.USDT_TON  # TON, USDT_TON, USDT_ETH, USDT_POL, USDC_ETH, USDC_BASE, USDC_POL
+PAYMENT_METHOD = PaymentMethod.USDT_GRAM  # GRAM, USDT_GRAM, USDT_ETH, USDT_POL, USDC_ETH, USDC_BASE, USDC_POL
 
 
 async def main() -> None:
diff --git a/examples/purchase/topup_ton_balance.py b/examples/purchase/topup_ton_balance.py
index e44731c..ee26860 100644
--- a/examples/purchase/topup_ton_balance.py
+++ b/examples/purchase/topup_ton_balance.py
@@ -1,10 +1,10 @@
 """
-Example: top up TON to a recipient's Telegram balance.
+Example: top up GRAM (ex TON) to a recipient's Telegram balance.
 
-For adding TON to a Telegram Ads account, use recharge_ads() instead.
+For adding GRAM (ex TON) to a Telegram Ads account, use recharge_ads() instead.
 
-Amount must be an integer between 1 and 1 000 000 000 TON.
-Your wallet must satisfy the current minimum TON threshold and transaction cost.
+Amount must be an integer between 1 and 1 000 000 000 GRAM (ex TON).
+Your wallet must satisfy the current minimum GRAM (ex TON) threshold and transaction cost.
 """
 
 import asyncio
@@ -31,13 +31,13 @@ COOKIES = {
 }
 
 USERNAME = "@username"
-AMOUNT = 10  # 1–1 000 000 000 TON
+AMOUNT = 10  # 1–1 000 000 000 GRAM (ex TON)
 
 
 async def main() -> None:
     async with FragmentClient(seed=SEED, api_key=API_KEY, cookies=COOKIES) as client:
         try:
-            result = await client.topup_ton(USERNAME, amount=AMOUNT, show_sender=True)
+            result = await client.topup_gram(USERNAME, amount=AMOUNT, show_sender=True)
         except UserNotFoundError:
             print(f"User {USERNAME} was not found on fragment.com — check the username and try again.")
             return
@@ -48,7 +48,7 @@ async def main() -> None:
             print(f"Invalid argument: {e}")
             return
 
-    print(f"{result.amount} TON successfully topped up for {result.username} | tx: {result.transaction_id}")
+    print(f"{result.amount} GRAM (ex TON) successfully topped up for {result.username} | tx: {result.transaction_id}")
 
 
 if __name__ == "__main__":
diff --git a/pyfragment/client.py b/pyfragment/client.py
index 2a90711..3b81841 100644
--- a/pyfragment/client.py
+++ b/pyfragment/client.py
@@ -36,7 +36,7 @@ class FragmentClient:
         connected with Fragment or Telegram.
 
     Args:
-        seed: 12- or 24-word mnemonic phrase for the TON wallet.
+        seed: 12- or 24-word mnemonic phrase for the GRAM (ex TON) wallet.
         api_key: Tonapi API key — get one at https://tonconsole.com.
         cookies: Fragment session cookies as a dict or JSON string.
         wallet_version: Wallet contract version — ``"V4R2"`` or ``"V5R1"`` (default).
@@ -140,7 +140,7 @@ class FragmentClient:
         username: str,
         months: int,
         show_sender: bool = True,
-        payment_method: PaymentMethod = PaymentMethod.TON,
+        payment_method: PaymentMethod = PaymentMethod.GRAM,
     ) -> PremiumResult:
         """Gift Telegram Premium to a user.
 
@@ -148,7 +148,7 @@ class FragmentClient:
             username: Recipient identifier — ``@username``, ``username``, or ``https://t.me/username``.
             months: Duration — ``3``, ``6``, or ``12``.
             show_sender: Show your name as the sender. Defaults to ``True``.
-            payment_method: Payment currency — ``"ton"`` (default), ``"usdt_ton"``,
+            payment_method: Payment currency — ``"ton"`` (GRAM (ex TON), default), ``"usdt_ton"`` (USDT on GRAM (ex TON)),
                 ``"usdt_eth"``, ``"usdt_pol"``, ``"usdc_eth"``, ``"usdc_base"``,
                 or ``"usdc_pol"``.
 
@@ -162,7 +162,7 @@ class FragmentClient:
         username: str,
         amount: int,
         show_sender: bool = True,
-        payment_method: PaymentMethod = PaymentMethod.TON,
+        payment_method: PaymentMethod = PaymentMethod.GRAM,
     ) -> StarsResult:
         """Send Telegram Stars to a user.
 
@@ -170,7 +170,7 @@ class FragmentClient:
             username: Recipient identifier — ``@username``, ``username``, or ``https://t.me/username``.
             amount: Number of stars — integer from ``50`` to ``10 000 000``.
             show_sender: Show your name as the gift sender. Defaults to ``True``.
-            payment_method: Payment currency — ``"ton"`` (default), ``"usdt_ton"``,
+            payment_method: Payment currency — ``"ton"`` (GRAM (ex TON), default), ``"usdt_ton"`` (USDT on GRAM (ex TON)),
                 ``"usdt_eth"``, ``"usdt_pol"``, ``"usdc_eth"``, ``"usdc_base"``,
                 or ``"usdc_pol"``.
 
@@ -179,18 +179,18 @@ class FragmentClient:
         """
         return await self.purchases.purchase_stars(username, amount, show_sender=show_sender, payment_method=payment_method)
 
-    async def topup_ton(self, username: str, amount: int, show_sender: bool = True) -> AdsTopupResult:
-        """Top up TON to a recipient's Telegram balance.
+    async def topup_gram(self, username: str, amount: int, show_sender: bool = True) -> AdsTopupResult:
+        """Top up GRAM (ex TON) to a recipient's Telegram balance.
 
         Args:
             username: Recipient's Telegram username (with or without ``@``).
-            amount: Amount in TON — integer from ``1`` to ``1 000 000 000``.
+            amount: Amount in GRAM (ex TON) — integer from ``1`` to ``1 000 000 000``.
             show_sender: Show your name as the sender. Defaults to ``True``.
 
         Returns:
             :class:`AdsTopupResult` with ``transaction_id``, ``username``, and ``amount``.
         """
-        return await self.ads.topup_ton(username, amount, show_sender=show_sender)
+        return await self.ads.topup_gram(username, amount, show_sender=show_sender)
 
     async def recharge_ads(self, account: str, amount: int) -> AdsRechargeResult:
         """Add funds to your own Telegram Ads account.
@@ -198,7 +198,7 @@ class FragmentClient:
         Args:
             account: Your Fragment Ads account identifier — the channel or bot username
                 the Ads account is linked to (e.g. ``"@mychannel"``).
-            amount: Amount in TON — integer from ``1`` to ``1 000 000 000``.
+            amount: Amount in GRAM (ex TON) — integer from ``1`` to ``1 000 000 000``.
 
         Returns:
             :class:`AdsRechargeResult` with ``transaction_id`` and ``amount``.
@@ -211,7 +211,7 @@ class FragmentClient:
         Returns:
             :class:`WalletInfo` with ``address`` (``"UQ..."``), ``state``
             (``"active"``, ``"uninit"``, ``"nonexist"``, or ``"frozen"``),
-            ``ton_balance`` in TON, and ``usdt_balance`` in USDT.
+            ``gram_balance`` in GRAM (ex TON), and ``usdt_balance`` in USDT.
         """
         return await self.tonapi.get_wallet()
 
@@ -220,7 +220,7 @@ class FragmentClient:
         channel: str,
         winners: int,
         amount: int,
-        payment_method: PaymentMethod = PaymentMethod.TON,
+        payment_method: PaymentMethod = PaymentMethod.GRAM,
     ) -> StarsGiveawayResult:
         """Run a Telegram Stars giveaway for a channel.
 
@@ -228,7 +228,7 @@ class FragmentClient:
             channel: Channel identifier — ``@channel``, ``channel``, or ``https://t.me/channel``.
             winners: Number of winners — integer from ``1`` to ``15``.
             amount: Stars each winner receives — integer from ``500`` to ``1 000 000``.
-            payment_method: Payment currency — ``"ton"`` (default), ``"usdt_ton"``,
+            payment_method: Payment currency — ``"ton"`` (GRAM (ex TON), default), ``"usdt_ton"`` (USDT on GRAM (ex TON)),
                 ``"usdt_eth"``, ``"usdt_pol"``, ``"usdc_eth"``, ``"usdc_base"``,
                 or ``"usdc_pol"``.
 
@@ -243,7 +243,7 @@ class FragmentClient:
         channel: str,
         winners: int,
         months: int = 3,
-        payment_method: PaymentMethod = PaymentMethod.TON,
+        payment_method: PaymentMethod = PaymentMethod.GRAM,
     ) -> PremiumGiveawayResult:
         """Run a Telegram Premium giveaway for a channel.
 
@@ -251,7 +251,7 @@ class FragmentClient:
             channel: Channel identifier — ``@channel``, ``channel``, or ``https://t.me/channel``.
             winners: Number of winners — integer from ``1`` to ``24 000``.
             months: Premium duration per winner — ``3``, ``6``, or ``12``. Defaults to ``3``.
-            payment_method: Payment currency — ``"ton"`` (default), ``"usdt_ton"``,
+            payment_method: Payment currency — ``"ton"`` (GRAM (ex TON), default), ``"usdt_ton"`` (USDT on GRAM (ex TON)),
                 ``"usdt_eth"``, ``"usdt_pol"``, ``"usdc_eth"``, ``"usdc_base"``,
                 or ``"usdc_pol"``.
 
diff --git a/pyfragment/core/constants/__init__.py b/pyfragment/core/constants/__init__.py
index 4e5be9a..7dd2c93 100644
--- a/pyfragment/core/constants/__init__.py
+++ b/pyfragment/core/constants/__init__.py
@@ -1,8 +1,11 @@
 from __future__ import annotations
 
+from pyfragment.core.constants.gram import DEVICE_INFO, USDT_GRAM_MASTER_ADDRESS
 from pyfragment.core.constants.headers import BASE_HEADERS, DEFAULT_TIMEOUT, REQUIRED_COOKIE_KEYS
 from pyfragment.core.constants.limits import (
-    MIN_TON_BALANCE,
+    GRAM_TOPUP_MAX,
+    GRAM_TOPUP_MIN,
+    MIN_GRAM_BALANCE,
     MIN_USDT_BALANCE,
     MNEMONIC_WORD_COUNTS_VALID,
     PREMIUM_MONTHS_VALID,
@@ -14,11 +17,8 @@ from pyfragment.core.constants.limits import (
     STARS_PURCHASE_MIN,
     STARS_WINNERS_MAX,
     STARS_WINNERS_MIN,
-    TON_TOPUP_MAX,
-    TON_TOPUP_MIN,
     TONAPI_KEY_MIN_LENGTH,
 )
-from pyfragment.core.constants.ton import DEVICE_INFO, USDT_TON_MASTER_ADDRESS
 from pyfragment.core.constants.urls import (
     ADS_TOPUP_PAGE,
     FRAGMENT_BASE_URL,
@@ -39,7 +39,9 @@ __all__ = [
     "FRAGMENT_BASE_URL",
     "FRAGMENT_DOMAIN",
     "GIFTS_PAGE",
-    "MIN_TON_BALANCE",
+    "GRAM_TOPUP_MAX",
+    "GRAM_TOPUP_MIN",
+    "MIN_GRAM_BALANCE",
     "MIN_USDT_BALANCE",
     "MNEMONIC_WORD_COUNTS_VALID",
     "NUMBERS_PAGE",
@@ -58,7 +60,5 @@ __all__ = [
     "STARS_WINNERS_MAX",
     "STARS_WINNERS_MIN",
     "TONAPI_KEY_MIN_LENGTH",
-    "TON_TOPUP_MAX",
-    "TON_TOPUP_MIN",
-    "USDT_TON_MASTER_ADDRESS",
+    "USDT_GRAM_MASTER_ADDRESS",
 ]
diff --git a/pyfragment/core/constants/ton.py b/pyfragment/core/constants/gram.py
similarity index 82%
rename from pyfragment/core/constants/ton.py
rename to pyfragment/core/constants/gram.py
index 9f6cbd2..f1cc6cc 100644
--- a/pyfragment/core/constants/ton.py
+++ b/pyfragment/core/constants/gram.py
@@ -2,7 +2,7 @@ from __future__ import annotations
 
 from typing import Any
 
-USDT_TON_MASTER_ADDRESS: str = "EQCxE6mUtQJKFnGfaROTKOt1lZbDiiX1kCixRv7Nw2Id_sDs"
+USDT_GRAM_MASTER_ADDRESS: str = "EQCxE6mUtQJKFnGfaROTKOt1lZbDiiX1kCixRv7Nw2Id_sDs"
 
 DEVICE_INFO: dict[str, Any] = {
     "platform": "iphone",
diff --git a/pyfragment/core/constants/limits.py b/pyfragment/core/constants/limits.py
index b054c80..bb35890 100644
--- a/pyfragment/core/constants/limits.py
+++ b/pyfragment/core/constants/limits.py
@@ -16,12 +16,12 @@ STARS_WINNERS_MAX: int = 15
 PREMIUM_WINNERS_MIN: int = 1
 PREMIUM_WINNERS_MAX: int = 24_000
 
-# TON topup / Ads recharge amount
-TON_TOPUP_MIN: int = 1
-TON_TOPUP_MAX: int = 1_000_000_000
+# GRAM (ex TON) topup / Ads recharge amount
+GRAM_TOPUP_MIN: int = 1
+GRAM_TOPUP_MAX: int = 1_000_000_000
 
 # Wallet minimum balances
-MIN_TON_BALANCE: float = 0.33
+MIN_GRAM_BALANCE: float = 0.33
 MIN_USDT_BALANCE: float = 0.75
 
 # Premium subscription durations (months)
diff --git a/pyfragment/domains/ads/__init__.py b/pyfragment/domains/ads/__init__.py
index 50fd95a..682fbb5 100644
--- a/pyfragment/domains/ads/__init__.py
+++ b/pyfragment/domains/ads/__init__.py
@@ -1,5 +1,5 @@
 from pyfragment.domains.ads.recharge import recharge_ads
 from pyfragment.domains.ads.service import AdsService
-from pyfragment.domains.ads.tonup import topup_ton
+from pyfragment.domains.ads.tonup import topup_gram
 
-__all__ = ["AdsService", "recharge_ads", "topup_ton"]
+__all__ = ["AdsService", "recharge_ads", "topup_gram"]
diff --git a/pyfragment/domains/ads/recharge.py b/pyfragment/domains/ads/recharge.py
index c79806a..ac7bf7c 100644
--- a/pyfragment/domains/ads/recharge.py
+++ b/pyfragment/domains/ads/recharge.py
@@ -4,7 +4,7 @@ import json
 import logging
 from typing import TYPE_CHECKING
 
-from pyfragment.core.constants import ADS_TOPUP_PAGE, DEVICE_INFO, TON_TOPUP_MAX, TON_TOPUP_MIN
+from pyfragment.core.constants import ADS_TOPUP_PAGE, DEVICE_INFO, GRAM_TOPUP_MAX, GRAM_TOPUP_MIN
 from pyfragment.domains.tonapi.account import get_account_info
 from pyfragment.domains.tonapi.transaction import process_transaction
 from pyfragment.exceptions import ConfigurationError, FragmentAPIError, FragmentError, UnexpectedError, VerificationError
@@ -18,8 +18,8 @@ logger = logging.getLogger(__name__)
 
 
 async def recharge_ads(client: FragmentClient, account: str, amount: int) -> AdsRechargeResult:
-    if not isinstance(amount, int) or not (TON_TOPUP_MIN <= amount <= TON_TOPUP_MAX):
-        raise ConfigurationError(ConfigurationError.INVALID_TON_AMOUNT)
+    if not isinstance(amount, int) or not (GRAM_TOPUP_MIN <= amount <= GRAM_TOPUP_MAX):
+        raise ConfigurationError(ConfigurationError.INVALID_GRAM_AMOUNT)
 
     try:
         await client.call("updateAdsState", {"mode": "new"}, page_url=ADS_TOPUP_PAGE)
@@ -47,8 +47,8 @@ async def recharge_ads(client: FragmentClient, account: str, amount: int) -> Ads
         return AdsRechargeResult(transaction_id=tx_hash, amount=amount)
 
     except FragmentError as exc:
-        logger.error("Failed to recharge Ads account '%s' for %s TON: %s", account, amount, exc, exc_info=True)
+        logger.error("Failed to recharge Ads account '%s' for %s GRAM (ex TON): %s", account, amount, exc, exc_info=True)
         raise
     except Exception as exc:
-        logger.exception("Failed to recharge Ads account '%s' for %s TON due to an unexpected error", account, amount)
+        logger.exception("Failed to recharge Ads account '%s' for %s GRAM (ex TON) due to an unexpected error", account, amount)
         raise UnexpectedError(UnexpectedError.UNEXPECTED.format(exc=exc)) from exc
diff --git a/pyfragment/domains/ads/service.py b/pyfragment/domains/ads/service.py
index ce310cc..35f3640 100644
--- a/pyfragment/domains/ads/service.py
+++ b/pyfragment/domains/ads/service.py
@@ -3,7 +3,7 @@ from __future__ import annotations
 from typing import TYPE_CHECKING
 
 from pyfragment.domains.ads.recharge import recharge_ads
-from pyfragment.domains.ads.tonup import topup_ton
+from pyfragment.domains.ads.tonup import topup_gram
 from pyfragment.domains.base import BaseService
 from pyfragment.models.payments import AdsRechargeResult, AdsTopupResult
 
@@ -15,5 +15,5 @@ class AdsService(BaseService):
     async def recharge_ads(self, account: str, amount: int) -> AdsRechargeResult:
         return await recharge_ads(self._client, account, amount)
 
-    async def topup_ton(self, username: str, amount: int, show_sender: bool = True) -> AdsTopupResult:
-        return await topup_ton(self._client, username, amount, show_sender=show_sender)
+    async def topup_gram(self, username: str, amount: int, show_sender: bool = True) -> AdsTopupResult:
+        return await topup_gram(self._client, username, amount, show_sender=show_sender)
diff --git a/pyfragment/domains/ads/tonup.py b/pyfragment/domains/ads/tonup.py
index 40d999b..f04bb56 100644
--- a/pyfragment/domains/ads/tonup.py
+++ b/pyfragment/domains/ads/tonup.py
@@ -4,7 +4,7 @@ import json
 import logging
 from typing import TYPE_CHECKING
 
-from pyfragment.core.constants import ADS_TOPUP_PAGE, DEVICE_INFO, TON_TOPUP_MAX, TON_TOPUP_MIN
+from pyfragment.core.constants import ADS_TOPUP_PAGE, DEVICE_INFO, GRAM_TOPUP_MAX, GRAM_TOPUP_MIN
 from pyfragment.domains.payments import parse_required_payment_amount
 from pyfragment.domains.tonapi.account import get_account_info
 from pyfragment.domains.tonapi.transaction import process_transaction
@@ -25,9 +25,9 @@ if TYPE_CHECKING:
 logger = logging.getLogger(__name__)
 
 
-async def topup_ton(client: FragmentClient, username: str, amount: int, show_sender: bool = True) -> AdsTopupResult:
-    if not isinstance(amount, int) or not (TON_TOPUP_MIN <= amount <= TON_TOPUP_MAX):
-        raise ConfigurationError(ConfigurationError.INVALID_TON_AMOUNT)
+async def topup_gram(client: FragmentClient, username: str, amount: int, show_sender: bool = True) -> AdsTopupResult:
+    if not isinstance(amount, int) or not (GRAM_TOPUP_MIN <= amount <= GRAM_TOPUP_MAX):
+        raise ConfigurationError(ConfigurationError.INVALID_GRAM_AMOUNT)
 
     try:
         await client.call("updateAdsTopupState", {"mode": "new"}, page_url=ADS_TOPUP_PAGE)
@@ -41,7 +41,7 @@ async def topup_ton(client: FragmentClient, username: str, amount: int, show_sen
         required_payment_amount = parse_required_payment_amount(result)
         req_id = result.get("req_id")
         if not req_id:
-            raise FragmentAPIError(FragmentAPIError.NO_REQUEST_ID.format(context="TON topup"))
+            raise FragmentAPIError(FragmentAPIError.NO_REQUEST_ID.format(context="GRAM (ex TON) topup"))
 
         account = await get_account_info(client)
         transaction = await client.call(
@@ -62,8 +62,12 @@ async def topup_ton(client: FragmentClient, username: str, amount: int, show_sen
         return AdsTopupResult(transaction_id=tx_hash, username=username, amount=amount)
 
     except FragmentError as exc:
-        logger.error("Failed to top up TON for user '%s' with %s TON: %s", username, amount, exc, exc_info=True)
+        logger.error(
+            "Failed to top up GRAM (ex TON) for user '%s' with %s GRAM (ex TON): %s", username, amount, exc, exc_info=True
+        )
         raise
     except Exception as exc:
-        logger.exception("Failed to top up TON for user '%s' with %s TON due to an unexpected error", username, amount)
+        logger.exception(
+            "Failed to top up GRAM (ex TON) for user '%s' with %s GRAM (ex TON) due to an unexpected error", username, amount
+        )
         raise UnexpectedError(UnexpectedError.UNEXPECTED.format(exc=exc)) from exc
diff --git a/pyfragment/domains/giveaways/giveaway.py b/pyfragment/domains/giveaways/giveaway.py
index b92adfb..3ca2245 100644
--- a/pyfragment/domains/giveaways/giveaway.py
+++ b/pyfragment/domains/giveaways/giveaway.py
@@ -48,7 +48,7 @@ async def giveaway_stars(
     channel: str,
     winners: int,
     amount: int,
-    payment_method: PaymentMethod = PaymentMethod.TON,
+    payment_method: PaymentMethod = PaymentMethod.GRAM,
 ) -> StarsGiveawayResult:
     if not isinstance(winners, int) or not (STARS_WINNERS_MIN <= winners <= STARS_WINNERS_MAX):
         raise ConfigurationError(ConfigurationError.INVALID_WINNERS_STARS)
@@ -143,7 +143,7 @@ async def giveaway_premium(
     channel: str,
     winners: int,
     months: int = 3,
-    payment_method: PaymentMethod = PaymentMethod.TON,
+    payment_method: PaymentMethod = PaymentMethod.GRAM,
 ) -> PremiumGiveawayResult:
     if not isinstance(winners, int) or not (PREMIUM_WINNERS_MIN <= winners <= PREMIUM_WINNERS_MAX):
         raise ConfigurationError(ConfigurationError.INVALID_WINNERS_PREMIUM)
diff --git a/pyfragment/domains/giveaways/service.py b/pyfragment/domains/giveaways/service.py
index db70b05..fd85eb6 100644
--- a/pyfragment/domains/giveaways/service.py
+++ b/pyfragment/domains/giveaways/service.py
@@ -17,7 +17,7 @@ class GiveawaysService(BaseService):
         channel: str,
         winners: int,
         amount: int,
-        payment_method: PaymentMethod = PaymentMethod.TON,
+        payment_method: PaymentMethod = PaymentMethod.GRAM,
     ) -> StarsGiveawayResult:
         return await giveaway_stars(self._client, channel, winners, amount, payment_method=payment_method)
 
@@ -26,6 +26,6 @@ class GiveawaysService(BaseService):
         channel: str,
         winners: int,
         months: int = 3,
-        payment_method: PaymentMethod = PaymentMethod.TON,
+        payment_method: PaymentMethod = PaymentMethod.GRAM,
     ) -> PremiumGiveawayResult:
         return await giveaway_premium(self._client, channel, winners, months, payment_method=payment_method)
diff --git a/pyfragment/domains/purchases/purchase.py b/pyfragment/domains/purchases/purchase.py
index 8449dc6..515de8d 100644
--- a/pyfragment/domains/purchases/purchase.py
+++ b/pyfragment/domains/purchases/purchase.py
@@ -45,7 +45,7 @@ async def purchase_stars(
     username: str,
     amount: int,
     show_sender: bool = True,
-    payment_method: PaymentMethod = PaymentMethod.TON,
+    payment_method: PaymentMethod = PaymentMethod.GRAM,
 ) -> StarsResult:
     if not isinstance(amount, int) or not (STARS_PURCHASE_MIN <= amount <= STARS_PURCHASE_MAX):
         raise ConfigurationError(ConfigurationError.INVALID_STARS_AMOUNT)
@@ -128,7 +128,7 @@ async def purchase_premium(
     username: str,
     months: int,
     show_sender: bool = True,
-    payment_method: PaymentMethod = PaymentMethod.TON,
+    payment_method: PaymentMethod = PaymentMethod.GRAM,
 ) -> PremiumResult:
     if months not in PREMIUM_MONTHS_VALID:
         raise ConfigurationError(ConfigurationError.INVALID_MONTHS)
diff --git a/pyfragment/domains/purchases/service.py b/pyfragment/domains/purchases/service.py
index 638d3db..cc3c18d 100644
--- a/pyfragment/domains/purchases/service.py
+++ b/pyfragment/domains/purchases/service.py
@@ -17,7 +17,7 @@ class PurchasesService(BaseService):
         username: str,
         amount: int,
         show_sender: bool = True,
-        payment_method: PaymentMethod = PaymentMethod.TON,
+        payment_method: PaymentMethod = PaymentMethod.GRAM,
     ) -> StarsResult:
         return await purchase_stars(self._client, username, amount, show_sender=show_sender, payment_method=payment_method)
 
@@ -26,6 +26,6 @@ class PurchasesService(BaseService):
         username: str,
         months: int,
         show_sender: bool = True,
-        payment_method: PaymentMethod = PaymentMethod.TON,
+        payment_method: PaymentMethod = PaymentMethod.GRAM,
     ) -> PremiumResult:
         return await purchase_premium(self._client, username, months, show_sender=show_sender, payment_method=payment_method)
diff --git a/pyfragment/domains/tonapi/account.py b/pyfragment/domains/tonapi/account.py
index 52aab22..c386c74 100644
--- a/pyfragment/domains/tonapi/account.py
+++ b/pyfragment/domains/tonapi/account.py
@@ -9,7 +9,7 @@ from tonutils.clients import TonapiClient
 from tonutils.contracts.jetton import get_wallet_address_get_method, get_wallet_data_get_method
 from tonutils.exceptions import ProviderResponseError
 
-from pyfragment.core.constants import MIN_TON_BALANCE, MIN_USDT_BALANCE, USDT_TON_MASTER_ADDRESS
+from pyfragment.core.constants import MIN_GRAM_BALANCE, MIN_USDT_BALANCE, USDT_GRAM_MASTER_ADDRESS
 from pyfragment.exceptions import WalletError
 from pyfragment.models.enums import WALLET_CLASSES
 from pyfragment.models.wallet import WalletInfo
@@ -22,11 +22,11 @@ logger = logging.getLogger(__name__)
 
 
 async def get_usdt_balance(ton: Any, wallet_address: str) -> float:
-    """Return the USDT balance for a Fragment-linked TON wallet."""
+    """Return the USDT balance for a Fragment-linked GRAM (ex TON) wallet."""
     try:
         jetton_wallet_address = await get_wallet_address_get_method(
             client=ton,
-            address=USDT_TON_MASTER_ADDRESS,
+            address=USDT_GRAM_MASTER_ADDRESS,
             owner_address=wallet_address,
         )
         wallet_data = await get_wallet_data_get_method(client=ton, address=jetton_wallet_address)
@@ -43,40 +43,40 @@ async def get_usdt_balance(ton: Any, wallet_address: str) -> float:
         raise WalletError(WalletError.USDT_BALANCE_CHECK_FAILED.format(exc=exc)) from exc
 
 
-async def check_ton_payment_balance(
-    balance_ton: float,
-    amount_ton: float,
+async def check_gram_payment_balance(
+    balance_gram: float,
+    amount_gram: float,
     required_payment_amount: float | None,
 ) -> None:
-    """Validate that the TON wallet can cover a TON-denominated payment."""
-    tx_price_ton = amount_ton
+    """Validate that the GRAM (ex TON) wallet can cover a GRAM (ex TON)-denominated payment."""
+    tx_price_gram = amount_gram
     if required_payment_amount is not None and required_payment_amount > 0:
-        tx_price_ton = max(tx_price_ton, required_payment_amount)
+        tx_price_gram = max(tx_price_gram, required_payment_amount)
 
-    required_ton = max(tx_price_ton, MIN_TON_BALANCE)
-    if balance_ton < required_ton:
+    required_gram = max(tx_price_gram, MIN_GRAM_BALANCE)
+    if balance_gram < required_gram:
         logger.error(
-            "Failed TON balance check: balance=%s TON, required=%s TON",
-            round(balance_ton, 6),
-            round(required_ton, 6),
+            "Failed GRAM (ex TON) balance check: balance=%s GRAM (ex TON), required=%s GRAM (ex TON)",
+            round(balance_gram, 6),
+            round(required_gram, 6),
         )
-        raise WalletError(WalletError.LOW_TON_BALANCE.format(balance=balance_ton, required=required_ton))
+        raise WalletError(WalletError.LOW_GRAM_BALANCE.format(balance=balance_gram, required=required_gram))
 
 
 async def check_usdt_payment_balance(
-    balance_ton: float,
+    balance_gram: float,
     required_payment_amount: float | None,
     ton: Any,
     wallet_address: str,
 ) -> None:
     """Validate that the wallet can cover a USDT-denominated payment."""
-    if balance_ton < MIN_TON_BALANCE:
+    if balance_gram < MIN_GRAM_BALANCE:
         logger.error(
-            "Failed TON gas reserve check for USDT payment: balance=%s TON, required=%s TON",
-            round(balance_ton, 6),
-            MIN_TON_BALANCE,
+            "Failed GRAM (ex TON) gas reserve check for USDT payment: balance=%s GRAM (ex TON), required=%s GRAM (ex TON)",
+            round(balance_gram, 6),
+            MIN_GRAM_BALANCE,
         )
-        raise WalletError(WalletError.LOW_TON_BALANCE.format(balance=balance_ton, required=MIN_TON_BALANCE))
+        raise WalletError(WalletError.LOW_GRAM_BALANCE.format(balance=balance_gram, required=MIN_GRAM_BALANCE))
 
     usdt_balance = await get_usdt_balance(ton, wallet_address)
     required_usdt = required_payment_amount if required_payment_amount is not None else MIN_USDT_BALANCE
@@ -109,7 +109,7 @@ async def get_account_info(client: FragmentClient) -> dict[str, Any]:
 
 
 async def get_wallet_info(client: FragmentClient) -> WalletInfo:
-    """Fetch the wallet address, chain state, and TON/USDT balances."""
+    """Fetch the wallet address, chain state, and GRAM (ex TON)/USDT balances."""
     async with TonapiClient(network=NetworkGlobalID.MAINNET, api_key=client.api_key) as ton:
         try:
             wallet_cls = WALLET_CLASSES[client.wallet_version]
@@ -120,7 +120,7 @@ async def get_wallet_info(client: FragmentClient) -> WalletInfo:
             return WalletInfo(
                 address=wallet.address.to_str(is_user_friendly=True, is_bounceable=False),
                 state=wallet.state.value,
-                ton_balance=round(wallet.balance / 1_000_000_000, 4),
+                gram_balance=round(wallet.balance / 1_000_000_000, 4),
                 usdt_balance=round(usdt_balance, 4),
             )
         except Exception as exc:
diff --git a/pyfragment/domains/tonapi/transaction.py b/pyfragment/domains/tonapi/transaction.py
index 731c1c5..49910a8 100644
--- a/pyfragment/domains/tonapi/transaction.py
+++ b/pyfragment/domains/tonapi/transaction.py
@@ -11,7 +11,7 @@ from ton_core import Cell, NetworkGlobalID
 from tonutils.clients import TonapiClient
 from tonutils.exceptions import ProviderResponseError
 
-from pyfragment.domains.tonapi.account import check_ton_payment_balance, check_usdt_payment_balance
+from pyfragment.domains.tonapi.account import check_gram_payment_balance, check_usdt_payment_balance
 from pyfragment.exceptions import ParseError, TransactionError, WalletError
 from pyfragment.models.enums import WALLET_CLASSES, PaymentMethod
 
@@ -26,7 +26,7 @@ def clean_decode(payload: str) -> str | Cell:
     """Decode a base64 BOC comment from Fragment into text when possible.
 
     Some Fragment payloads are plain text comments, while others are structured
-    TON messages such as jetton transfers. Non-text payloads are returned as a
+    GRAM (ex TON) messages such as jetton transfers. Non-text payloads are returned as a
     `Cell` so the caller can keep the raw binary structure.
     """
     s = payload.strip()
@@ -39,7 +39,7 @@ def clean_decode(payload: str) -> str | Cell:
         sl = cell.begin_parse()
         op = sl.load_uint(32)
         if op != 0:
-            # Non-zero op code means this is a structured TON message, not a plain text comment.
+            # Non-zero op code means this is a structured GRAM (ex TON) message, not a plain text comment.
             return cell
         try:
             return sl.load_snake_string().strip()
@@ -62,7 +62,7 @@ def _extract_message(transaction_data: dict[str, Any]) -> dict[str, Any]:
 async def _check_payment_balances(
     wallet: Any,
     payment_method: PaymentMethod,
-    amount_ton: float,
+    amount_gram: float,
     required_payment_amount: float | None,
     transaction_data: dict[str, Any],
     ton: Any,
@@ -70,18 +70,18 @@ async def _check_payment_balances(
     """Refresh wallet and verify sufficient balance before broadcasting."""
     try:
         await wallet.refresh()
-        balance_ton = wallet.balance / 1_000_000_000
+        balance_gram = wallet.balance / 1_000_000_000
         if payment_method == "ton":
-            await check_ton_payment_balance(balance_ton, amount_ton, required_payment_amount)
+            await check_gram_payment_balance(balance_gram, amount_gram, required_payment_amount)
         else:
             # USDT is paid from the Fragment-linked wallet, not the signing wallet.
             fragment_wallet_address = transaction_data["transaction"].get("from", "")
-            await check_usdt_payment_balance(balance_ton, required_payment_amount, ton, fragment_wallet_address)
+            await check_usdt_payment_balance(balance_gram, required_payment_amount, ton, fragment_wallet_address)
     except WalletError:
         raise
     except Exception as exc:
         logger.exception("Failed to validate balances before broadcasting transaction")
-        raise WalletError(WalletError.TON_BALANCE_CHECK_FAILED.format(exc=exc)) from exc
+        raise WalletError(WalletError.GRAM_BALANCE_CHECK_FAILED.format(exc=exc)) from exc
 
 
 async def _broadcast_with_retry(wallet: Any, message: dict[str, Any], payload: str | Cell) -> str:
@@ -90,7 +90,7 @@ async def _broadcast_with_retry(wallet: Any, message: dict[str, Any], payload: s
         try:
             result = await wallet.transfer(
                 destination=message["address"],
-                amount=int(message["amount"]),  # nanotons, not TON
+                amount=int(message["amount"]),  # nanograms, not GRAM (ex TON)
                 body=payload,
             )
             return str(result.normalized_hash)
@@ -124,10 +124,10 @@ async def _broadcast_with_retry(wallet: Any, message: dict[str, Any], payload: s
 async def process_transaction(
     client: FragmentClient,
     transaction_data: dict[str, Any],
-    payment_method: PaymentMethod = PaymentMethod.TON,
+    payment_method: PaymentMethod = PaymentMethod.GRAM,
     required_payment_amount: float | None = None,
 ) -> str:
-    """Sign and broadcast a Fragment transaction with the seeded TON wallet.
+    """Sign and broadcast a Fragment transaction with the seeded GRAM (ex TON) wallet.
 
     Args:
         client: Authenticated `FragmentClient` instance.
@@ -139,13 +139,13 @@ async def process_transaction(
         Normalized transaction hash string.
     """
     message = _extract_message(transaction_data)
-    amount_ton = int(message["amount"]) / 1_000_000_000
+    amount_gram = int(message["amount"]) / 1_000_000_000
 
     async with TonapiClient(network=NetworkGlobalID.MAINNET, api_key=client.api_key) as ton:
         wallet_cls = WALLET_CLASSES[client.wallet_version]
         wallet, _, _, _ = wallet_cls.from_mnemonic(client=ton, mnemonic=client.seed)
 
-        await _check_payment_balances(wallet, payment_method, amount_ton, required_payment_amount, transaction_data, ton)
+        await _check_payment_balances(wallet, payment_method, amount_gram, required_payment_amount, transaction_data, ton)
 
         payload = clean_decode(str(message.get("payload", "")))
 
@@ -161,7 +161,7 @@ async def process_transaction(
                     raise TransactionError(TransactionError.BROADCAST_FAILED_SSL.format(exc=exc)) from exc
                 cause = cause.__cause__ or cause.__context__
             logger.exception(
-                "Failed to broadcast transaction to '%s' for %s nanotons using payment method '%s'",
+                "Failed to broadcast transaction to '%s' for %s nanograms using payment method '%s'",
                 message["address"],
                 message["amount"],
                 payment_method,
diff --git a/pyfragment/exceptions.py b/pyfragment/exceptions.py
index 898396c..e49a7b1 100644
--- a/pyfragment/exceptions.py
+++ b/pyfragment/exceptions.py
@@ -1,6 +1,8 @@
 from __future__ import annotations
 
 from pyfragment.core.constants.limits import (
+    GRAM_TOPUP_MAX,
+    GRAM_TOPUP_MIN,
     MNEMONIC_WORD_COUNTS_VALID,
     PREMIUM_MONTHS_VALID,
     PREMIUM_WINNERS_MAX,
@@ -11,8 +13,6 @@ from pyfragment.core.constants.limits import (
     STARS_PURCHASE_MIN,
     STARS_WINNERS_MAX,
     STARS_WINNERS_MIN,
-    TON_TOPUP_MAX,
-    TON_TOPUP_MIN,
     TONAPI_KEY_MIN_LENGTH,
 )
 
@@ -39,7 +39,7 @@ class ConfigurationError(ClientError):
     INVALID_STARS_AMOUNT = (
         f"Invalid Stars amount: must be an integer between {STARS_PURCHASE_MIN:,} and {STARS_PURCHASE_MAX:,}."
     )
-    INVALID_TON_AMOUNT = f"Invalid TON amount: must be an integer between {TON_TOPUP_MIN:,} and {TON_TOPUP_MAX:,}."
+    INVALID_GRAM_AMOUNT = f"Invalid GRAM (ex TON) amount: must be an integer between {GRAM_TOPUP_MIN:,} and {GRAM_TOPUP_MAX:,}."
     INVALID_USERNAME = (
         "Invalid username '{username}'. "
         "Must be 5-32 characters and contain only letters (A-Z, a-z), digits (0-9), or underscores (_)."
@@ -70,7 +70,7 @@ class CookieError(ClientError):
     )
     MISSING_BROWSER_KEYS = (
         "Fragment cookies not found in {browser}: {keys}. "
-        "Make sure you are logged in to {url} and have connected your TON wallet in {browser}."
+        "Make sure you are logged in to {url} and have connected your GRAM (ex TON) wallet in {browser}."
     )
     EXPIRED = "Fragment session cookie expired at {expires}. Log in to fragment.com in your browser and extract fresh cookies."
 
@@ -111,7 +111,7 @@ class AnonymousNumberError(FragmentAPIError):
 
 
 class TransactionError(FragmentAPIError):
-    """Raised when a TON transaction fails to build or broadcast."""
+    """Raised when a GRAM (ex TON) transaction fails to build or broadcast."""
 
     INVALID_PAYLOAD = "Fragment returned an invalid transaction payload: 'transaction.messages' is missing or empty."
     BROADCAST_FAILED = "Transaction broadcast failed: {exc}"
@@ -123,7 +123,7 @@ class TransactionError(FragmentAPIError):
         "located in your Python installation folder."
     )
     DUPLICATE_SEQNO = (
-        "Transaction broadcast failed: the TON wallet rejected the message "
+        "Transaction broadcast failed: the GRAM (ex TON) wallet rejected the message "
         "because a previous transaction with the same sequence number (seqno) "
         "is still pending confirmation on-chain.\n"
         "Wait a few seconds for the previous transaction to confirm, then retry."
@@ -150,14 +150,16 @@ class OperationError(FragmentError):
 
 
 class WalletError(OperationError):
-    """Raised for TON wallet issues (connection, balance, account info)."""
+    """Raised for GRAM (ex TON) wallet issues (connection, balance, account info)."""
 
-    LOW_TON_BALANCE = "Insufficient TON balance: {balance:.4f} TON available, {required:.4f} TON required."
+    LOW_GRAM_BALANCE = (
+        "Insufficient GRAM (ex TON) balance: {balance:.4f} GRAM (ex TON) available, {required:.4f} GRAM (ex TON) required."
+    )
     LOW_USDT_BALANCE = "Insufficient USDT balance: {balance:.4f} USDT available, {required:.4f} USDT required."
-    TON_BALANCE_CHECK_FAILED = "Failed to fetch TON balance: {exc}"
+    GRAM_BALANCE_CHECK_FAILED = "Failed to fetch GRAM (ex TON) balance: {exc}"
     USDT_BALANCE_CHECK_FAILED = "Failed to fetch USDT balance: {exc}"
-    ACCOUNT_INFO_FAILED = "Failed to retrieve wallet account info from TON network: {exc}"
-    WALLET_INFO_FAILED = "Failed to retrieve wallet info from TON network: {exc}"
+    ACCOUNT_INFO_FAILED = "Failed to retrieve wallet account info from GRAM (ex TON) network: {exc}"
+    WALLET_INFO_FAILED = "Failed to retrieve wallet info from GRAM (ex TON) network: {exc}"
 
 
 class UnexpectedError(OperationError):
diff --git a/pyfragment/models/enums.py b/pyfragment/models/enums.py
index 5b0a4a7..3d7a94f 100644
--- a/pyfragment/models/enums.py
+++ b/pyfragment/models/enums.py
@@ -15,8 +15,8 @@ else:
 
 
 class PaymentMethod(StrEnum):
-    TON = "ton"
-    USDT_TON = "usdt_ton"
+    GRAM = "ton"
+    USDT_GRAM = "usdt_ton"
 
     # Not supported yet
     USDT_ETH = "usdt_eth"
diff --git a/pyfragment/models/payments.py b/pyfragment/models/payments.py
index 9eb14f5..408b005 100644
--- a/pyfragment/models/payments.py
+++ b/pyfragment/models/payments.py
@@ -30,7 +30,7 @@ class AdsTopupResult:
     amount: int
 
     def __repr__(self) -> str:
-        return f"AdsTopupResult(username='{self.username}', amount={self.amount} TON, tx='{self.transaction_id}')"
+        return f"AdsTopupResult(username='{self.username}', amount={self.amount} GRAM (ex TON), tx='{self.transaction_id}')"
 
 
 @dataclass
@@ -39,7 +39,7 @@ class AdsRechargeResult:
     amount: int
 
     def __repr__(self) -> str:
-        return f"AdsRechargeResult(amount={self.amount} TON, tx='{self.transaction_id}')"
+        return f"AdsRechargeResult(amount={self.amount} GRAM (ex TON), tx='{self.transaction_id}')"
 
 
 __all__ = ["AdsRechargeResult", "AdsTopupResult", "PremiumResult", "StarsResult"]
diff --git a/pyfragment/models/wallet.py b/pyfragment/models/wallet.py
index c52fdac..5f15a51 100644
--- a/pyfragment/models/wallet.py
+++ b/pyfragment/models/wallet.py
@@ -7,13 +7,13 @@ from dataclasses import dataclass
 class WalletInfo:
     address: str
     state: str
-    ton_balance: float
+    gram_balance: float
     usdt_balance: float
 
     def __repr__(self) -> str:
         return (
             f"WalletInfo(address='{self.address}', state='{self.state}', "
-            f"ton_balance={self.ton_balance} TON, usdt_balance={self.usdt_balance} USDT)"
+            f"gram_balance={self.gram_balance} GRAM (ex TON), usdt_balance={self.usdt_balance} USDT)"
         )
 
 
diff --git a/pyproject.toml b/pyproject.toml
index 82974a4..615706b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,7 +5,7 @@ build-backend = "hatchling.build"
 [project]
 name = "pyfragment"
 version = "2026.3.2"
-description = "Async Python client for the Fragment API. Buy Stars and Premium, top up TON and Ads balances, run giveaways, manage anonymous numbers, and search Fragment listings."
+description = "Async Python client for the Fragment API. Buy Stars and Premium, top up GRAM (ex TON) and Ads balances, run giveaways, manage anonymous numbers, and search Fragment listings."
 readme = "README.md"
 license = { text = "MIT" }
 requires-python = ">=3.10"
@@ -91,10 +91,16 @@ ignore = ["E501", "UP017"]
 [tool.mypy]
 python_version = "3.10"
 strict = true
-exclude = ["^examples/", "^logs/"]
+exclude = ["^examples/", "^logs/", "^tests/"]
 
 [[tool.mypy.overrides]]
-module = "rookiepy"
+module = [
+    "rookiepy",
+    "httpx",
+    "ton_core",
+    "tonutils",
+    "tonutils.*",
+]
 ignore_missing_imports = true
 
 [[tool.mypy.overrides]]
diff --git a/tests/003_test_balance.py b/tests/003_test_balance.py
index cedd4b5..fbe0d73 100644
--- a/tests/003_test_balance.py
+++ b/tests/003_test_balance.py
@@ -1,4 +1,4 @@
-"""Exercise transaction signing, balance checks, and retry behavior for TON and USDT flows."""
+"""Exercise transaction signing, balance checks, and retry behavior for GRAM (ex TON) and USDT flows."""
 
 from collections.abc import Generator
 from contextlib import contextmanager
@@ -22,7 +22,7 @@ TRANSACTION_DATA = {
         "messages": [
             {
                 "address": "0:852443f8599fe6a5da34fe43049ac4e0beb3071bb2bfb56635ea9421287c283a",
-                "amount": "500000000",  # 0.5 TON
+                "amount": "500000000",  # 0.5 GRAM
                 "payload": "",
             }
         ]
@@ -63,7 +63,7 @@ def _patch_wallet(wallet: MagicMock) -> Generator[None, None, None]:
 
 @pytest.mark.asyncio
 async def test_sufficient_balance_broadcasts() -> None:
-    wallet = _make_wallet(balance_nanotons=1_000_000_000)  # 1 TON, above threshold
+    wallet = _make_wallet(balance_nanotons=1_000_000_000)  # 1 GRAM, above threshold
     with _patch_wallet(wallet), patch("pyfragment.domains.tonapi.transaction.clean_decode", return_value="50 Telegram Stars"):
         result = await process_transaction(_make_client(), TRANSACTION_DATA)
     assert result == "abc123"
@@ -72,7 +72,7 @@ async def test_sufficient_balance_broadcasts() -> None:
 
 @pytest.mark.asyncio
 async def test_insufficient_balance_raises() -> None:
-    wallet = _make_wallet(balance_nanotons=100_000_000)  # 0.1 TON, below threshold
+    wallet = _make_wallet(balance_nanotons=100_000_000)  # 0.1 GRAM, below threshold
     with _patch_wallet(wallet):
         with pytest.raises(WalletError, match="required"):
             await process_transaction(_make_client(), TRANSACTION_DATA)
@@ -89,7 +89,7 @@ async def test_exact_minimum_balance_broadcasts() -> None:
 
 @pytest.mark.asyncio
 async def test_one_nanoton_below_minimum_raises() -> None:
-    wallet = _make_wallet(balance_nanotons=499_999_999)  # 1 nanoton below transaction amount threshold
+    wallet = _make_wallet(balance_nanotons=499_999_999)  # 1 nanogram below transaction amount threshold
     with _patch_wallet(wallet):
         with pytest.raises(WalletError, match="required"):
             await process_transaction(_make_client(), TRANSACTION_DATA)
@@ -142,11 +142,11 @@ async def test_duplicate_seqno_raises_after_retries() -> None:
 
 
 @pytest.mark.asyncio
-async def test_usdt_payment_requires_min_ton_gas_reserve() -> None:
-    wallet = _make_wallet(balance_nanotons=10_000_000)  # 0.01 TON below MIN_TON_BALANCE
+async def test_usdt_payment_requires_min_gram_gas_reserve() -> None:
+    wallet = _make_wallet(balance_nanotons=10_000_000)  # 0.01 GRAM below MIN_GRAM_BALANCE
     with _patch_wallet(wallet), patch("pyfragment.domains.tonapi.account.get_usdt_balance", AsyncMock(return_value=100.0)):
-        with pytest.raises(WalletError, match="Insufficient TON balance"):
-            await process_transaction(_make_client(), TRANSACTION_DATA, payment_method=PaymentMethod.USDT_TON)
+        with pytest.raises(WalletError, match="Insufficient GRAM"):
+            await process_transaction(_make_client(), TRANSACTION_DATA, payment_method=PaymentMethod.USDT_GRAM)
 
 
 @pytest.mark.asyncio
@@ -174,6 +174,6 @@ async def test_usdt_payment_checks_usdt_balance() -> None:
             await process_transaction(
                 _make_client(),
                 transaction,
-                payment_method=PaymentMethod.USDT_TON,
+                payment_method=PaymentMethod.USDT_GRAM,
                 required_payment_amount=12.5,
             )
diff --git a/tests/004_test_stars.py b/tests/004_test_stars.py
index 1dc6b08..4a6d7df 100644
--- a/tests/004_test_stars.py
+++ b/tests/004_test_stars.py
@@ -87,7 +87,7 @@ async def test_purchase_stars_passes_payment_method(client: FragmentClient) -> N
         patch.object(_purchase_stars_mod, "get_account_info", AsyncMock(return_value=FAKE_ACCOUNT)),
         patch.object(_purchase_stars_mod, "process_transaction", proc_mock),
     ):
-        await client.purchase_stars("@user", amount=500, payment_method=PaymentMethod.USDT_TON)
+        await client.purchase_stars("@user", amount=500, payment_method=PaymentMethod.USDT_GRAM)
 
     init_call = call_mock.await_args_list[2]
     assert init_call.args[0] == "initBuyStarsRequest"
@@ -209,7 +209,7 @@ async def test_giveaway_stars_passes_payment_method(client: FragmentClient) -> N
         patch.object(_giveaway_stars_mod, "get_account_info", AsyncMock(return_value=FAKE_ACCOUNT)),
         patch.object(_giveaway_stars_mod, "process_transaction", proc_mock),
     ):
-        await client.giveaway_stars("@channel", winners=3, amount=1000, payment_method=PaymentMethod.USDT_TON)
+        await client.giveaway_stars("@channel", winners=3, amount=1000, payment_method=PaymentMethod.USDT_GRAM)
 
     init_call = call_mock.await_args_list[3]
     assert init_call.args[0] == "initGiveawayStarsRequest"
diff --git a/tests/005_test_premium.py b/tests/005_test_premium.py
index 8ecae0c..babf5f7 100644
--- a/tests/005_test_premium.py
+++ b/tests/005_test_premium.py
@@ -78,7 +78,7 @@ async def test_purchase_premium_passes_payment_method(client: FragmentClient) ->
         patch.object(_purchase_premium_mod, "get_account_info", AsyncMock(return_value=FAKE_ACCOUNT)),
         patch.object(_purchase_premium_mod, "process_transaction", proc_mock),
     ):
-        await client.purchase_premium("@user", months=6, payment_method=PaymentMethod.USDT_TON)
+        await client.purchase_premium("@user", months=6, payment_method=PaymentMethod.USDT_GRAM)
 
     init_call = call_mock.await_args_list[2]
     assert init_call.args[0] == "initGiftPremiumRequest"
@@ -207,7 +207,7 @@ async def test_giveaway_premium_passes_payment_method(client: FragmentClient) ->
         patch.object(_giveaway_premium_mod, "get_account_info", AsyncMock(return_value=FAKE_ACCOUNT)),
         patch.object(_giveaway_premium_mod, "process_transaction", proc_mock),
     ):
-        await client.giveaway_premium("@channel", winners=10, months=6, payment_method=PaymentMethod.USDT_TON)
+        await client.giveaway_premium("@channel", winners=10, months=6, payment_method=PaymentMethod.USDT_GRAM)
 
     init_call = call_mock.await_args_list[3]
     assert init_call.args[0] == "initGiveawayPremiumRequest"
diff --git a/tests/006_test_topup.py b/tests/006_test_topup.py
index e1807da..0b06b7a 100644
--- a/tests/006_test_topup.py
+++ b/tests/006_test_topup.py
@@ -1,40 +1,40 @@
-"""Cover TON top-up through Telegram Ads, including recipient lookup and transaction building."""
+"""Cover GRAM (ex TON) top-up through Telegram Ads, including recipient lookup and transaction building."""
 
 from unittest.mock import AsyncMock, patch
 
 import pytest
 
-import pyfragment.domains.ads.tonup as _topup_ton_mod
+import pyfragment.domains.ads.tonup as _topup_gram_mod
 from pyfragment import AdsTopupResult, ConfigurationError, FragmentClient, UserNotFoundError
-from pyfragment.core.constants.limits import TON_TOPUP_MAX, TON_TOPUP_MIN
+from pyfragment.core.constants.limits import GRAM_TOPUP_MAX, GRAM_TOPUP_MIN
 from tests.shared import FAKE_ACCOUNT, FAKE_RECIPIENT, FAKE_REQ_ID, FAKE_TRANSACTION, FAKE_TX_HASH
 
-# Topup TON validation tests
+# Topup GRAM (ex TON) validation tests
 
 
 @pytest.mark.asyncio
-async def test_topup_ton_amount_zero(client: FragmentClient) -> None:
+async def test_topup_gram_amount_zero(client: FragmentClient) -> None:
     with pytest.raises(ConfigurationError):
-        await client.topup_ton("@user", amount=TON_TOPUP_MIN - 1)
+        await client.topup_gram("@user", amount=GRAM_TOPUP_MIN - 1)
 
 
 @pytest.mark.asyncio
-async def test_topup_ton_amount_too_high(client: FragmentClient) -> None:
+async def test_topup_gram_amount_too_high(client: FragmentClient) -> None:
     with pytest.raises(ConfigurationError):
-        await client.topup_ton("@user", amount=TON_TOPUP_MAX + 1)
+        await client.topup_gram("@user", amount=GRAM_TOPUP_MAX + 1)
 
 
 @pytest.mark.asyncio
-async def test_topup_ton_float_amount(client: FragmentClient) -> None:
+async def test_topup_gram_float_amount(client: FragmentClient) -> None:
     with pytest.raises(ConfigurationError):
-        await client.topup_ton("@user", amount=1.5)  # type: ignore[arg-type]
+        await client.topup_gram("@user", amount=1.5)  # type: ignore[arg-type]
 
 
-# Topup TON mocked tests
+# Topup GRAM (ex TON) mocked tests
 
 
 @pytest.mark.asyncio
-async def test_topup_ton_success(client: FragmentClient) -> None:
+async def test_topup_gram_success(client: FragmentClient) -> None:
     with (
         patch.object(
             client,
@@ -48,10 +48,10 @@ async def test_topup_ton_success(client: FragmentClient) -> None:
                 ]
             ),
         ),
-        patch.object(_topup_ton_mod, "get_account_info", AsyncMock(return_value=FAKE_ACCOUNT)),
-        patch.object(_topup_ton_mod, "process_transaction", AsyncMock(return_value=FAKE_TX_HASH)),
+        patch.object(_topup_gram_mod, "get_account_info", AsyncMock(return_value=FAKE_ACCOUNT)),
+        patch.object(_topup_gram_mod, "process_transaction", AsyncMock(return_value=FAKE_TX_HASH)),
     ):
-        result = await client.topup_ton("@user", amount=10)
+        result = await client.topup_gram("@user", amount=10)
 
     assert isinstance(result, AdsTopupResult)
     assert result.transaction_id == FAKE_TX_HASH
@@ -60,7 +60,7 @@ async def test_topup_ton_success(client: FragmentClient) -> None:
 
 
 @pytest.mark.asyncio
-async def test_topup_ton_user_not_found(client: FragmentClient) -> None:
+async def test_topup_gram_user_not_found(client: FragmentClient) -> None:
     with patch.object(
         client,
         "call",
@@ -72,4 +72,4 @@ async def test_topup_ton_user_not_found(client: FragmentClient) -> None:
         ),
     ):
         with pytest.raises(UserNotFoundError):
-            await client.topup_ton("@ghost", amount=10)
+            await client.topup_gram("@ghost", amount=10)
diff --git a/tests/007_test_wallet.py b/tests/007_test_wallet.py
index 2010aa6..9f699c3 100644
--- a/tests/007_test_wallet.py
+++ b/tests/007_test_wallet.py
@@ -1,20 +1,20 @@
-"""Verify wallet inspection returns friendly TON and USDT balances from Tonapi."""
+"""Verify wallet inspection returns friendly GRAM (ex TON) and USDT balances from Tonapi."""
 
 from unittest.mock import AsyncMock, MagicMock, patch
 
 import pytest
 
 from pyfragment import FragmentClient, WalletInfo
-from tests.shared import FAKE_ADDRESS, FAKE_BALANCE_NANOTON
+from tests.shared import FAKE_ADDRESS, FAKE_BALANCE_NANOGRAM
 
-# Wallet mocked tests (TON and USDT balances are returned separately)
+# Wallet mocked tests (GRAM and USDT balances are returned separately)
 
 
 @pytest.mark.asyncio
 async def test_get_wallet_returns_wallet_info(client: FragmentClient) -> None:
     mock_wallet = MagicMock()
     mock_wallet.refresh = AsyncMock()
-    mock_wallet.balance = FAKE_BALANCE_NANOTON
+    mock_wallet.balance = FAKE_BALANCE_NANOGRAM
     mock_wallet.state = MagicMock(value="active")
     mock_wallet.address.to_str.return_value = FAKE_ADDRESS
 
@@ -32,7 +32,7 @@ async def test_get_wallet_returns_wallet_info(client: FragmentClient) -> None:
     assert isinstance(result, WalletInfo)
     assert result.address == FAKE_ADDRESS
     assert result.state == "active"
-    assert result.ton_balance == round(FAKE_BALANCE_NANOTON / 1_000_000_000, 4)
+    assert result.gram_balance == round(FAKE_BALANCE_NANOGRAM / 1_000_000_000, 4)
     assert result.usdt_balance == 12.3456
 
 
@@ -55,6 +55,6 @@ async def test_get_wallet_balance_is_zero(client: FragmentClient) -> None:
 
         result = await client.get_wallet()
 
-    assert result.ton_balance == 0.0
+    assert result.gram_balance == 0.0
     assert result.usdt_balance == 0.0
     assert result.state == "uninit"
diff --git a/tests/010_test_recharge_ads.py b/tests/010_test_recharge_ads.py
index 51f56a2..283e1de 100644
--- a/tests/010_test_recharge_ads.py
+++ b/tests/010_test_recharge_ads.py
@@ -6,7 +6,7 @@ import pytest
 
 import pyfragment.domains.ads.recharge as _recharge_ads_mod
 from pyfragment import AdsRechargeResult, ConfigurationError, FragmentClient
-from pyfragment.core.constants.limits import TON_TOPUP_MAX, TON_TOPUP_MIN
+from pyfragment.core.constants.limits import GRAM_TOPUP_MAX, GRAM_TOPUP_MIN
 from tests.shared import FAKE_ACCOUNT, FAKE_ADS_ACCOUNT, FAKE_REQ_ID, FAKE_TRANSACTION, FAKE_TX_HASH
 
 # recharge_ads validation tests
@@ -15,13 +15,13 @@ from tests.shared import FAKE_ACCOUNT, FAKE_ADS_ACCOUNT, FAKE_REQ_ID, FAKE_TRANS
 @pytest.mark.asyncio
 async def test_recharge_ads_amount_zero(client: FragmentClient) -> None:
     with pytest.raises(ConfigurationError):
-        await client.recharge_ads(FAKE_ADS_ACCOUNT, amount=TON_TOPUP_MIN - 1)
+        await client.recharge_ads(FAKE_ADS_ACCOUNT, amount=GRAM_TOPUP_MIN - 1)
 
 
 @pytest.mark.asyncio
 async def test_recharge_ads_amount_too_high(client: FragmentClient) -> None:
     with pytest.raises(ConfigurationError):
-        await client.recharge_ads(FAKE_ADS_ACCOUNT, amount=TON_TOPUP_MAX + 1)
+        await client.recharge_ads(FAKE_ADS_ACCOUNT, amount=GRAM_TOPUP_MAX + 1)
 
 
 @pytest.mark.asyncio
diff --git a/tests/shared.py b/tests/shared.py
index 1ce6be4..161cf9e 100644
--- a/tests/shared.py
+++ b/tests/shared.py
@@ -1,7 +1,7 @@
 """Shared test constants for the pyfragment test suite.
 
 pyfragment is an async Python client for the Fragment API — a unified toolkit
-to manage Telegram assets: purchase Stars and Premium, top up TON and Ads balances,
+to manage Telegram assets: purchase Stars and Premium, top up GRAM (ex TON) and Ads balances,
 run giveaways, manage anonymous numbers, and explore the marketplace for usernames,
 numbers, and gifts.
 """
@@ -31,7 +31,7 @@ FAKE_RESPONSE: dict[str, Any] = {"status": "ok", "data": {"value": 42}}
 
 # get_wallet()
 FAKE_ADDRESS: str = "UQCppfw5DxWgdVHf3zkmZS8k1mt9oAUYxQLwq2fz3nhO8No5"
-FAKE_BALANCE_NANOTON: int = 1_500_000_000  # 1.5 TON
+FAKE_BALANCE_NANOGRAM: int = 1_500_000_000  # 1.5 GRAM (ex TON)
 
 # recharge_ads
 FAKE_ADS_ACCOUNT: str = "@mychannel"