verifiers.js

module.exports = {
  /**
   * Verify github account method. It will return the github username if verified correctly.
   * @param     did       DID of the user to be verified
   * @param     proof     URL to the gist file under the user account containing the user DID.
   * @returns   Object containing the github user in the data field and in case of error, the error message under the error field.
   */
  verifyGithub: async (did, proof) => {
    if (!proof || proof.trim() === "") {
      throw new Error("verifyGithub: proof (gist url) parameter is not present");
    }
    if (!did || did.trim() === "") {
      throw new Error("verifyGithub: DID parameter is not present");
    }
    let gistFileContent = await (await fetch(proof)).text();
    if (gistFileContent.trim() !== did) {
      return { error: "Gist File provided does not contain the correct DID" };
    }

    const githubUsername = gistUrl.replace("https://gist.githubusercontent.com/", "").split("/")[0];
    return { data: githubUsername };
  }
};