# event TokensTraded()

### event TokensTraded()

Every trade on Bancor will emit this event with information on the trade itself.

```javascript
event TokensTraded(
        bytes32 contextId,
        Token indexed pool,
        Token indexed sourceToken,
        Token indexed targetToken,
        uint256 sourceAmount,
        uint256 targetAmount,
        uint256 bntAmount,
        uint256 targetFeeAmount,
        uint256 bntFeeAmount,
        address trader
    );
```

| Parameter Name  | Type    | Description                                                                                |
| --------------- | ------- | ------------------------------------------------------------------------------------------ |
| contextId       | bytes32 | Unique identifier for the specific transaction (can be used for grouping multiple events)  |
| pool            | Token   | the address of the pool utilizing the trade                                                |
| sourceToken     | Token   | The source token address                                                                   |
| targetToken     | Token   | The target token address                                                                   |
| sourceAmount    | unit256 | The amount of source tokens                                                                |
| targetAmount    | unit256 | The amount of target tokens                                                                |
| bntAmount       | unit256 | Amount of BNT tokens that were reallocated from sourceToken to targetToken trade liquidity |
| targetFeeAmount | unit256 | The trading fee amount for target tokens                                                   |
| bntFeeAmount    | unit256 | The trading fee amount for BNT tokens                                                      |
| trader          | address | The senders wallet address                                                                 |

Trades on the Bancor Network are represented by a single-hop in all cases. TokensTraded event tracks the key information. The sourceAmount is provided by the trader in exchange for the targetAmount (which already has the targetTokenFee subtracted from it). 

Behind the scenes, the bntAmount is the BNT volume that facilitates the trade and has the bntFee subtracted from it.