Function getConfig

ts/textsecure/WebAPI.preload.ts:2095–2154

(
  configHash?: string
)

}

export async function getConfig(
  configHash?: string
): Promise<RemoteConfigResponseType> {
  const { data, response } = await _ajax({
    host: 'chatService',
    call: 'configV2',
    httpType: 'GET',
    responseType: 'jsonwithdetails',
    zodSchema: z.union([
      remoteConfigResponseZod,
      // When a 304 is returned, the body of the response is empty.
      z.literal(''),
    ]),
    headers: {
      ...(configHash && { 'if-none-match': configHash }),
    },
  });

  const serverTimestamp = safeParseNumber(
    response.headers.get('x-signal-timestamp') || ''
  );

  if (serverTimestamp == null) {
    throw new Error('Missing required x-signal-timestamp header');
  }

  const newConfigHash = response.headers.get('etag');
  if (newConfigHash == null) {
    throw new Error('Missing required ETag header');
  }

  const partialResponse = { serverTimestamp, configHash: newConfigHash };

  if (response.status === 304) {
    return {
      config: 'unmodified',
      ...partialResponse,
    };
  }

  if (data === '') {
    throw new Error('Empty data returned for non-304');
  }

  const { config: newConfig } = data;

  const config = new Map(
    Object.entries(newConfig).filter(
      ([name, _value]) =>
        name.startsWith('desktop.') ||
        name.startsWith('global.') ||
        name.startsWith('cds.')
    )
  );

  return {
    config,
    ...partialResponse,