<!-- Do not edit this file. It is automatically generated by API Documenter. --> [Home](./index.md) > [bitburner](./bitburner.md) > [Hacknet](./bitburner.hacknet.md) > [getCacheUpgradeCost](./bitburner.hacknet.getcacheupgradecost.md) ## Hacknet.getCacheUpgradeCost() method Calculate the cost of upgrading hacknet node cache. **Signature:** ```typescript getCacheUpgradeCost(index: number, n?: number): number; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | index | number | Index/Identifier of Hacknet Node. | | n | number | _(Optional)_ Number of times to upgrade cache. Must be positive. Will be rounded to the nearest integer. Defaults to 1 if not specified. | **Returns:** number Cost of upgrading the specified Hacknet Node's cache. ## Remarks RAM cost: 0 GB This function is only applicable for Hacknet Servers (the upgraded version of a Hacknet Node). Returns the cost of upgrading the cache level of the specified Hacknet Server by n. If an invalid value for n is provided, then this function returns 0. If the specified Hacknet Node is already at max level, then Infinity is returned.