# VirtualMaster.mineSaltAsync

Searches for a salt that satisfies TIP-1022 PoW using parallel workers and WASM-accelerated keccak256.

[TIP-1022](https://tips.sh/1022)

Uses WASM-accelerated keccak256 with parallel workers when available. Falls back to chunked single-threaded mining in environments without worker support.

* **Node.js / Bun / Deno**: Spawns `worker_threads` with inline WASM keccak256. - **Browsers**: Spawns Web Workers via Blob URLs with inline WASM keccak256.

## Imports

:::code-group
```ts [Named]
import { VirtualMaster } from 'ox/tempo'
```

```ts [Entrypoint]
import * as VirtualMaster from 'ox/tempo/VirtualMaster'
```
:::

## Examples

```ts twoslash
import { Address } from 'ox'
import { VirtualMaster } from 'ox/tempo'

const result = await VirtualMaster.mineSaltAsync({
  address: '0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266'
})
```

## Definition

```ts
function mineSaltAsync(
  parameters: mineSaltAsync.Parameters,
): Promise<mineSalt.ReturnType | undefined>
```

**Source:** [src/tempo/VirtualMaster.ts](https://github.com/wevm/ox/blob/main/src/tempo/VirtualMaster.ts#L733)

## Parameters

### parameters

* **Type:** `mineSaltAsync.Parameters`

Search parameters.

#### parameters.address

* **Type:** `abitype_Address`

Master address.

#### parameters.chunkSize

* **Type:** `number`
* **Optional**

Number of salts each worker processes before sending a progress update.

#### parameters.count

* **Type:** `number`
* **Optional**

Number of consecutive salts to try.

#### parameters.onProgress

* **Type:** `(progress: Progress) => void`
* **Optional**

Progress callback invoked after each completed chunk.

#### parameters.signal

* **Type:** `AbortSignal`
* **Optional**

AbortSignal for cancellation.

#### parameters.start

* **Type:** `Salt`
* **Optional**

Starting salt value.

#### parameters.workers

* **Type:** `number`
* **Optional**

Number of workers to use.

Set to `0` or `1` to disable worker parallelism.

## Return Type

The first matching salt, if any.

`Promise<mineSalt.ReturnType | undefined>`