Method readWebBundleLength

js/sign/src/core/signed-web-bundle.ts:159–167

(bundle: Uint8Array)

  // private method, static to emphasize pure functional character
  private static readWebBundleLength(bundle: Uint8Array): number {
    // The length of the web bundle is contained in the last 8 bytes of the web
    // bundle, represented as BigEndian.
    const buffer = Buffer.from(bundle.slice(-8));
    // Number is big enough to represent 4GB which is the limit for the web
    // bundle size which can be contained in a Buffer, which is the format
    // in which it's passed back to e.g. Webpack.
    return Number(buffer.readBigUint64BE());
  }
}