bitburner-src/markdown/bitburner.hacknet.spendhashes.md

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[Home](./index.md) &gt; [bitburner](./bitburner.md) &gt; [Hacknet](./bitburner.hacknet.md) &gt; [spendHashes](./bitburner.hacknet.spendhashes.md)
## Hacknet.spendHashes() method
Purchase a hash upgrade.
**Signature:**
```typescript
spendHashes(upgName: string, upgTarget?: string, count?: number): boolean;
```
## Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| upgName | string | Name of the upgrade of Hacknet Node. |
| upgTarget | string | _(Optional)_ Object to which upgrade applies. Required for certain upgrades. |
| count | number | _(Optional)_ Number of upgrades to buy at once. Defaults to 1 if not specified. For compatibility reasons, upgTarget must be specified, even if it is not used, in order to specify count. |
**Returns:**
boolean
True if the upgrade is successfully purchased, and false otherwise.
## Remarks
RAM cost: 0 GB
This function is only applicable for Hacknet Servers (the upgraded version of a Hacknet Node).
Spend the hashes generated by your Hacknet Servers on an upgrade. Returns a boolean value - true if the upgrade is successfully purchased, and false otherwise.
The name of the upgrade must be an exact match. The `upgTarget` argument is used for upgrades such as `Reduce Minimum Security`<!-- -->, which applies to a specific server. In this case, the `upgTarget` argument must be the hostname of the server.
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## Example
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```js
// For upgrades where no target is required
ns.hacknet.spendHashes("Sell for Corporation Funds");
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// For upgrades requiring a target
ns.hacknet.spendHashes("Increase Maximum Money", "foodnstuff");
```