# isCallError

> **isCallError**(`error`): `error is CallError`

Defined in: [errors/index.ts:165](https://github.com/B3Pay/ic-reactor/blob/452866bcf5c5994de1f73416e6a3b2d18e4188fa/packages/core/src/errors/index.ts#L165)

Type guard to check if an error is a CallError

## Parameters

### error

`unknown`

## Returns

`error is CallError`