Set your Local Domain Fallback list

type Cloudflare = {

  token: string;

  email: string;

  key: string;

};

/**

 * Set your Local Domain Fallback list

 * Sets the list of domains to bypass Gateway DNS resolution. These domains will use the specified local DNS resolver instead.

 */

export async function main(

  auth: Cloudflare,

  identifier: string,

  body: {

    description?: string;

    dns_server?: unknown[];

    suffix: string;

    [k: string]: unknown;

  }[]

) {

  const url = new URL(

    `https://api.cloudflare.com/client/v4/accounts/${identifier}/devices/policy/fallback_domains`

  );

  const response = await fetch(url, {

    method: "PUT",

    headers: {

      "X-AUTH-EMAIL": auth.email,

      "X-AUTH-KEY": auth.key,

      "Content-Type": "application/json",

      Authorization: "Bearer " + auth.token,

    },

    body: JSON.stringify(body),

  });

  if (!response.ok) {

    const text = await response.text();

    throw new Error(`${response.status} ${text}`);

  }

  return await response.json();

}