# ExchangeInject

Injects capital into the transaction. The purpose of injecting capital into the trading pair is to prevent price fluctuation from affecting the transaction.

This method will use `30` [Compute Units](/v1/about/billing.md).

***

## **Parameters**

* `owner_address` - String - Address of the transaction creator
* `exchange_id` - int32 - Transaction Pair ID
* `token_id` - String - Token ID; usually is the token name, which needs to be in hexString format
* `quant` - int32 - Number of capital injection tokens
* `permission_id` - int32 - Optional, for multi-signature use
* `visible` - boolean - Optional. Specifies whether the address is in Base58 format (default: false)

## **Returns**

Transaction object - JSON object: Unsigned transaction, please refer to the [Transaction](https://developers.tron.network/docs/tron-protocol-transaction) chapter for the fields contained in it. Since the transaction type is `ExchangeInjectContract`, the fields contained in `raw_data.contract[0].parameter.value` in the transaction are as follows:

| Field          | Type   | Description                         |
| -------------- | ------ | ----------------------------------- |
| owner\_address | string | Account address                     |
| exchange\_id   | int64  | Exchange id                         |
| token\_id      | string | The id of the token to be injected  |
| quant          | int64  | The amount of tokens to be injected |

{% tabs %}
{% tab title="mainnet" %}

```bash
curl https://mainnet.tron.validationcloud.io/v1/<YOUR_API_KEY_HERE>/wallet/exchangeinject \
    -X POST \
    -H "Content-Type: application/json" \
    -d '
{
  "owner_address": "TZ4UXDV5ZhNW7fb2AMSbgfAEZ7hWsnYS2g",
  "exchange_id": 12,
  "token_id": "31303030343837",
  "quant": 100,
  "visible": true
}
'
```

{% endtab %}
{% endtabs %}


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