Script for making an offer on opensea

make-offer-opensea.js

// if type module -> cannot use reqiure, need import
// In package.json: "type": "module",
import { OpenSeaSDK, Network } from "opensea-js";
import HDWalletProvider from "@truffle/hdwallet-provider";
import { config } from 'dotenv';
config();

// https://github.com/ProjectOpenSea/opensea-js#making-offers

const WALLET_PRIVATE_KEY = process.env.WALLET_PRIVATE_KEY
const OPENSEA_API_KEY = process.env.OPENSEA_API_KEY
const RPC_URL = process.env.RPC_URL
const provider = new HDWalletProvider(
  WALLET_PRIVATE_KEY, RPC_URL
);

const openseaSDK = new OpenSeaSDK(provider, {
  networkName: Network.Main,
  apiKey: OPENSEA_API_KEY,
});


const tokenAddress = "0x3A112D86899578E63b373B6D09322E18Aed924Cb"
const tokenId = "4946"
const accountAddress = "0x5E113EDC0eaf00699889FC510DB121308bBA1261"
const schemaName = "ERC721"
const startAmount = 0.004


async function makeOffer(tokenAddress, tokenId, schemaName, accountAddress, startAmount) {
    console.log("start making offer")
    const offer = await openseaSDK.createBuyOrder({
    asset: {
        tokenId,
        tokenAddress,
        schemaName
        },
    accountAddress,
    startAmount,
    });
  console.log(offer)
  console.log("making offer succeeded")
}

makeOffer(tokenAddress, tokenId, schemaName, accountAddress, startAmount)