Function uuid4

packages/core/src/utils/misc.ts:36–57

(crypto = getCrypto())

 * @returns string Generated UUID4.
 */
export function uuid4(crypto = getCrypto()): string {
  try {
    if (crypto?.randomUUID) {
      // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
      return withRandomSafeContext(() => crypto.randomUUID!()).replace(/-/g, '');
    }
  } catch {
    // some runtimes can crash invoking crypto
    // https://github.com/getsentry/sentry-javascript/issues/8935
  }

  if (!emptyUuid) {
    // http://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid-in-javascript/2117523#2117523
    // Concatenating the following numbers as strings results in '10000000100040008000100000000000'
    emptyUuid = ([1e7] as unknown as string) + 1e3 + 4e3 + 8e3 + 1e11;
  }

  return emptyUuid.replace(/[018]/g, c =>
    // eslint-disable-next-line no-bitwise
    ((c as unknown as number) ^ ((getRandomByte() & 15) >> ((c as unknown as number) / 4))).toString(16),
  );
}

function getFirstException(event: Event): Exception | undefined {
  return event.exception?.values?.[0];