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

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[Home](./index.md) &gt; [bitburner](./bitburner.md) &gt; [Hacknet](./bitburner.hacknet.md) &gt; [upgradeCache](./bitburner.hacknet.upgradecache.md)
## Hacknet.upgradeCache() method
Upgrade the cache of a hacknet node.
**Signature:**
```typescript
upgradeCache(index: number, n?: number): boolean;
```
## Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| index | number | Index/Identifier of Hacknet Node. |
| n | number | _(Optional)_ Number of cache levels to purchase. Must be positive. Rounded to nearest integer. Defaults to 1 if not specified. |
**Returns:**
boolean
True if the Hacknet Nodes cache level is successfully upgraded, false otherwise.
## Remarks
RAM cost: 0 GB
This function is only applicable for Hacknet Servers (the upgraded version of a Hacknet Node).
Tries to upgrade the specified Hacknet Servers cache n times.
Returns true if it successfully upgrades the Servers cache n times, or if it purchases some positive amount and the Server reaches its max cache level.
Returns false otherwise.