| --- | --- | --- |

| autoDownload = <code>true</code>| <code>boolean</code> | <a name="AppUpdater-autoDownload"></a>Whether to automatically download an update when it is found. |

| allowPrerelease| <code>boolean</code> | <a name="AppUpdater-allowPrerelease"></a>*GitHub provider only.* Whether to allow update to pre-release versions. Defaults to `true` if application version contains prerelease components (e.g. `0.12.1-alpha.1`, here `alpha` is a prerelease component), otherwise `false`.<br><br>If `true`, downgrade will be allowed (`allowDowngrade` will be set to `true`). |

| requestHeaders| <code>[RequestHeaders](electron-builder-http#RequestHeaders)</code> \| <code>null</code> | <a name="AppUpdater-requestHeaders"></a>The request headers. |

| logger = <code>(&lt;any&gt;global).__test_app ? null : console</code>| <code>[Logger](#Logger)</code> \| <code>null</code> | <a name="AppUpdater-logger"></a>The logger. You can pass [electron-log](https://github.com/megahertz/electron-log), [winston](https://github.com/winstonjs/winston) or another logger with the following interface: `{ info(), warn(), error() }`. Set it to `null` if you would like to disable a logging feature. |

| signals = <code>new UpdaterSignal(this)</code>| <code>[UpdaterSignal](#UpdaterSignal)</code> | <a name="AppUpdater-signals"></a>For type safety you can use signals, e.g. `autoUpdater.signals.updateDownloaded(() => {})` instead of `autoUpdater.on('update-available', () => {})` |

/**

allowDowngrade = false

throw new Error(`App version is not valid semver version: "${currentVersionString}`)

}

if (options != null) {

this.setFeedURL(options)

async function testUpdateFromBintray(app: any) {

const updater = new NsisUpdater(null, app)

updater.updateConfigPath = await writeUpdateConfig(<BintrayOptions>{

provider: "bintray",

owner: "actperepo",