# updateFlowByOperator

Updates an existing stream from a `sender` to a `receiver` using [ACL permissions](https://superfluid.gitbook.io/superfluid/developers/constant-flow-agreement-cfa/cfa-access-control-list-acl).

```javascript
//load the token you'd like to use like this 
//note that tokens may be loaded by symbol or by address
const daix = await sf.loadSuperToken("DAIx");

let flowOp = daix.updateFlowByOperator({
  sender: string,
  receiver: string,
  flowRate: string,
  userData?: string
});

await flowOp.exec( <<ethers signer>> );
```

### Parameters

<table><thead><tr><th width="182">Parameter</th><th width="231.33333333333331">Type</th><th>Description</th></tr></thead><tbody><tr><td><code>sender</code></td><td><code>string</code></td><td>Address of sender</td></tr><tr><td><code>receiver</code></td><td><code>string</code></td><td>Address of receiver</td></tr><tr><td><code>flowRate</code></td><td><code>string</code></td><td>New desired wei/second flow rate that <code>sender</code> wants to start streaming at to the <code>receiver</code></td></tr><tr><td><code>userData</code></td><td><code>string</code></td><td><em>Optional</em> <a href="https://docs.superfluid.finance/superfluid/developers/super-apps/user-data">user data</a></td></tr></tbody></table>

### Example Usage

<https://codesandbox.io/s/update-flow-as-operator-xceyyz?from-embed=&file=/src/UpdateFlowAsOperator.js:935-999>

### Additional Considerations

* If `updateFlowByOperator` is called with a `flowRate` that is the same as the current flow rate, it will *not* revert.


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