Function supportsRetryableWrites

src/utils.ts:1022–1041

(server?: Server)

 * @internal
 */
export function supportsRetryableWrites(server?: Server): boolean {
  if (!server) {
    return false;
  }

  if (server.loadBalanced) {
    // Loadbalanced topologies will always support retry writes
    return true;
  }

  if (server.description.logicalSessionTimeoutMinutes != null) {
    // that supports sessions
    if (server.description.type !== ServerType.Standalone) {
      // and that is not a standalone
      return true;
    }
  }

  return false;
}

/**
 * Fisher–Yates Shuffle