Function getFileInfoSign

getFileInfoSign(
    trackId: string | number,
    quality?: string,
    codecs?: string,
    transport?: string,
    key?: string,
): FileInfoSign
Create the signature for a /get-file-info (lossless download) request.

The signature is HMAC-SHA256(key, "{ts}{trackId}{quality}{codecs}{transport}") with commas stripped, Base64-encoded, with the trailing character removed — matching the Android client. The same codecs/transport strings must be sent in the query for the signature to validate.
Parameters
- trackId: string | number
  The track the request is scoped to.
- quality: string = 'lossless'
  Requested quality (for example lossless). Defaults to lossless.
- codecs: string = FILE_INFO_CODECS
  Requested codecs string. Defaults to FILE_INFO_CODECS.
- transport: string = FILE_INFO_TRANSPORT
  Requested transport string. Defaults to FILE_INFO_TRANSPORT.
- key: string = DEFAULT_SIGN_KEY
  The signing key. Defaults to DEFAULT_SIGN_KEY.
Returns FileInfoSign
The timestamp/value pair to send alongside the request.
- Defined in src/signRequest.ts:89