# Monitoring

Every time a new value is submitted to the Tellor contract, the following event is emitted:

```solidity
event NewReport(
    bytes32 _queryId,
    uint256 _time,
    bytes _value,
    uint256 _nonce,
    bytes _queryData,
    address _reporter
);
```

The `_value` is the requested data, with `_queryData` being the description of the data.

To dispute a value, go to the governance contract and run:

```solidity
/**
 * @dev Helps initialize a dispute by assigning it a disputeId
 * @param _queryId being disputed
 * @param _timestamp being disputed
 */
function beginDispute(bytes32 _queryId, uint256 _timestamp) external {
```

Note that before beginning a dispute, the proper amount of TRB tokens must be approved to the contract to cover the dispute fee. `disputeFee` is a constant public variable in the contracts, however doubles with each voting round or with each open dispute on a given ID.

To get the number of open disputes on an ID:

```solidity
/**
 * @dev Returns the number of open disputes for a specific query ID
 * @param _queryId is the ID of a specific data feed
 * @return uint256 of the number of open disputes for the query ID
 */
function getOpenDisputesOnId(bytes32 _queryId)
    external
    view
    returns (uint256)
{
```

To open a dispute on a previously dispute (challenge the result of the vote), simply run `beginDispute()` with the same parameters (same timestamp/ queryID). Note that the dispute fee will need to be doubled from the previous round.


---

# 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.tellor.io/tellor-docs-v2/disputing-data/monitoring.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.