# Start Transaction (ETH)

## Start Transaction (Ether)

To start a transaction with a native token, there is no need to allow the Escrow contract to spend a certain amount. The user just has to send the total (price+fees) with the transaction. 

In this example we have an ad with the following information:

* Marketplace id : `marketplaceId1`
* Ad id : `adId2`
* Price of the ad (excluding fees) : 2 ETH
* Seller's address : `0x70997970C51812dc3A010C7d01b50e0d17dc79C8`

The fees for this token is 2%, the user must send the total amount (price+fees) which is : `2*1,02 = 2,04 ETH`

```javascript
//New transaction
await escrow.startTransaction(
    "marketplaceId1", //Marketplace id
    "adId2", //Ad id
    ethers.utils.parseEther("2"), //Ad price
    "0x0000000000000000000000000000000000000000", //ETH address
    "0x70997970C51812dc3A010C7d01b50e0d17dc79C8", //Seller's address
    {
      value: ethers.utils.parseEther("2.04"), //Price+fees in ETH
    }
);
```

{% hint style="danger" %}
Even if it's an ETH transaction you must specify a token address that matches the ETH address in the whitelist : `0x0000000000000000000000000000000000000000`Nothing is sent/received on this address, it's used internally for mapping purposes.
{% endhint %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.smartlink.so/for-third-parties-eth/start-transaction-eth.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.