# Gas manager

#### What it is

**Gas Manager** is an automatic service that tops up the native coin in the required network (for example, ETH, TRX, TON, etc.) on your payment addresses.\
Its purpose is simple: to prevent your operations from stopping due to insufficient “gas”

#### Why it matters for clients

If a payment address runs out of the network’s native coin, some operations may fail or be delayed.\
Gas Manager removes this operational burden from merchants and keeps balances at working levels automatically.

#### How the service works (in simple terms)

1. The service regularly checks native-coin balances on your active payment addresses.
2. For each network, it compares the current balance with the auto top-up threshold.
3. If the balance is below the threshold, the service starts a top-up process.
4. The top-up is executed automatically, without manual actions from the merchant.
5. After sending, the service checks confirmations and completes the operation.
6. If confirmation is not received on the first check, the service performs automatic rechecks.

#### What is charged during top-up

Each auto top-up includes two parts:

1. **Top-up amount** (USD equivalent, configured per network).
2. **Gas Manager fee** (percentage of the top-up amount, configured per network).

**Fee formula:**\
`Fee (USD) = Top-up amount (USD) × Fee (%) / 100`

**Total debit:**\
`Total (USD) = Top-up amount (USD) + Fee (USD)`

#### Important notes

1. If an address already has enough native balance, no top-up is performed.
2. If reserve liquidity is insufficient, top-up may not start or may be completed only partially.
3. When multiple addresses are processed, partial outcomes are possible: some addresses are topped up, others are not.
4. The final received amount in native coin may slightly differ due to market conditions and network costs at the time of execution.

#### What is needed for stable operation

1. Gas Manager enabled and active for the merchant.
2. Sufficient reserve liquidity for automatic top-ups.
3. Active payment addresses in the required networks.

***

### Gas Manager Network Parameters 

| Chain     | Native Coin | Top-Up Threshold, USD | Top-Up Amount, USD | Gas Manager Fee, % |
| --------- | ----------- | --------------------: | -----------------: | -----------------: |
| Bitcoin   | BTC         |                 30.00 |              60.00 |              10.00 |
| BNB chain | BNB         |                 10.00 |              30.00 |              10.00 |
| Ethereum  | ETH         |                 10.00 |              30.00 |              10.00 |
| Fraxtal   | ETH         |                 10.00 |              20.00 |              10.00 |
| Litecoin  | LTC         |                 10.00 |              20.00 |              10.00 |
| Polygon   | MATIC       |                 10.00 |              20.00 |              10.00 |
| Solana    | SOL         |                 10.00 |              20.00 |              10.00 |
| Ton       | TON         |                 10.00 |              20.00 |              10.00 |
| Tron      | TRX         |                 20.00 |              50.00 |              10.00 |


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