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[Home ](./index.md ) > [bitburner ](./bitburner.md ) > [Hacknet ](./bitburner.hacknet.md ) > [spendHashes ](./bitburner.hacknet.spendhashes.md )
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## Hacknet.spendHashes() method
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Purchase a hash upgrade.
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< b > Signature:< / b >
```typescript
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spendHashes(upgName: string, upgTarget?: string): boolean;
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```
## Parameters
| Parameter | Type | Description |
| --- | --- | --- |
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| upgName | string | Name of the upgrade of Hacknet Node. |
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| upgTarget | string | Object to which upgrade applies. Required for certain upgrades. |
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< b > Returns:< / b >
boolean
True if the upgrade is successfully purchased, and false otherwise..
## Remarks
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RAM cost: 0 GB
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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 1
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```ts
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// NS1:
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hacknet.spendHashes("Sell for Corporation Funds");
hacknet.spendHashes("Increase Maximum Money", "foodnstuff");
```
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## Example 2
```ts
NS2:
ns.hacknet.spendHashes("Sell for Corporation Funds");
ns.hacknet.spendHashes("Increase Maximum Money", "foodnstuff");
```