---
title: sha3
---
# sha3 <TitleWithCodeLink2 link="sha3" />

Helper function that will sha3 any value using keccak256.
Internally it will use `Buffer.from(input, 'utf8')` to process the input first. If you want to hash a hexString or ByteArray, use `TronWeb.utils.ethersUtils.keccak256(input)`.

### Usage

```JavaScript
TronWeb.sha3(value);
```

### Parameters

| Parameter | Description                                                         | Data Type |
| --------- | ------------------------------------------------------------------- | --------- |
| string    | The string that needs to be hashed using Keccak-256 SHA3 algorithm. | String    |
| prefix    | the result includes `0x` prefix if set as true                      | Boolean   |

### Returns

String - The result hashed using the Keccak-256 SHA3 algorithm.

### Example

```JavaScript

var hash = TronWeb.sha3("some string to be hashed");
console.log(hash)
// output-start
'0xc4b9bbe7eb8797cf2818085dbcd6ea6662b3261c28810c318e079c8d0c691da6'
// output-end
var hashOfHash = TronWeb.sha3(hash, false)
// output-start
'c4b9bbe7eb8797cf2818085dbcd6ea6662b3261c28810c318e079c8d0c691da6'
// output-end
```