How it works

DrepID standard allow dreps to reserve a name for them. The reserved name can then be used to find out the DRep's id, making it easier to find and delegate to the DRep.

Reserving a name requires following

• DRep's offchain-signature
• Platform's signature
• Small registration fee

Finding out DRepId by name

• Find out the address that owns the token with that name.
• Extract DRep-id from the address holding the token

Here's a simple script to demonstrate DRep.ID in action

const libcardano = require("libcardano");
const axios = require("axios");


const handleName = "spannercode";
const drepIdPolicy = "1bc9af6f44cee790f8d4ea19d8628213704cdb0ae54920f1f7715522";

const assetName = Buffer.from(handleName).toString("hex");

// Define your Blockfrost API key
const API_KEY = "mainnetx208KvPkRuilWIH68tPY8PT9v7EbzNe4"; // Replace with your Blockfrost API key
const blockfrostUrl = "https://cardano-mainnet.blockfrost.io";



const getTokenHolders = async (drepIdPolicy, assetName) => {
  try {
    const apiClient = axios.create({
      baseURL: blockfrostUrl,
      headers: {
        project_id: API_KEY,
      },
    });

    // Fetch matching address for the asset using axios
    const response = await apiClient.get(
      `/api/v0/assets/${drepIdPolicy}${assetName}/addresses`
    );

    const data = response.data;

    if (data?.error) {
      console.error("Error fetching data:", data.error);
      return;
    }


    // extract DRepID and log
    const [{ address }] = data;
    console.log("Token present At:", address);
    const addr = libcardano.ShelleyAddress.fromBech32(address);
    const addrStake = addr.stakePart;
    const drepCredential = new  libcardano.DrepCredential(
      addrStake.bytes,
      addrStake.isScript
    );

    console.log("Drep keyHash : " + drepCredential.bytes.toString('hex'));
    console.log("Drep Address : " + drepCredential.toBech32());

  } catch (error) {
    console.log(error)
    console.error("Error fetching token holders:", error);
  }
};

getTokenHolders(drepIdPolicy,assetName)