ppai/polymarket/apikey.js

import 'dotenv/config';

import axios from "axios";
import { HttpsProxyAgent } from "https-proxy-agent";
import { Chain, ClobClient } from "@polymarket/clob-client-v2";
import { createWalletClient, http } from "viem";
import { privateKeyToAccount } from "viem/accounts";
import { polygon } from "viem/chains";

const NODE_HTTP_PROXY = process.env.NODE_HTTP_PROXY;
if (NODE_HTTP_PROXY) {
  axios.defaults.proxy = false;
  axios.defaults.httpsAgent = new HttpsProxyAgent(NODE_HTTP_PROXY);
}

const getRequiredEnv = (key) => {
  const value = process.env[key];
  if (!value) {
    throw new Error(`${key} is required`);
  }
  return value;
}

const normalizePrivateKey = (privateKey) => {
  return privateKey.startsWith("0x") ? privateKey : `0x${privateKey}`;
}

const HOST = "https://clob.polymarket.com";
const account = privateKeyToAccount(normalizePrivateKey(getRequiredEnv("POLYMARKET_PRIVATE_KEY")));
const signer = createWalletClient({ account, chain: polygon, transport: http() });

const client = new ClobClient({
  host: HOST,
  chain: Chain.POLYGON,
  signer,
  throwOnError: true,
});

const nonce = process.env.POLYMARKET_API_KEY_NONCE
  ? Number(process.env.POLYMARKET_API_KEY_NONCE)
  : undefined;

if (nonce !== undefined && !Number.isInteger(nonce)) {
  throw new Error(`POLYMARKET_API_KEY_NONCE is invalid: ${process.env.POLYMARKET_API_KEY_NONCE}`);
}

const apiKey = await client.createApiKey(nonce).catch(error => {
  if (error?.status === 400) {
    return client.deriveApiKey(nonce);
  }
  throw error;
});

if (!apiKey?.key || !apiKey?.secret || !apiKey?.passphrase) {
  throw new Error(`failed to create or derive api key: ${JSON.stringify(apiKey)}`);
}

console.log(JSON.stringify(apiKey, null, 2));