example script to list an 1155 token on opensea

opensea-1155-listing.ts

import * as fs from "fs";
import * as dotenv from "dotenv";
import { OpenSeaPort, Network } from "opensea-js";

dotenv.config();

const HDWalletProvider = require("@truffle/hdwallet-provider");

const mnemonic = fs.readFileSync(".mnemonic").toString().trim();
const ETH_RPC_URL = process.env.ETH_RPC_URL;
const CONTRACT_ADDRESS = process.env.CONTRACT_ADDRESS || "";
const OWNER_ADDRESS = process.env.OWNER_ADDRESS;
const NETWORK = process.env.NETWORK;
const TOKEN_ID = process.env.FACTORY_OPTION_ID || "";
const OPENSEA_API_KEY = process.env.OPENSEA_API_KEY;

if (!CONTRACT_ADDRESS) {
  console.error("Please specify a contract address.");
}

const provider = new HDWalletProvider(mnemonic, ETH_RPC_URL);
const seaport = new OpenSeaPort(
  provider,
  {
    networkName:
      NETWORK === "mainnet" || NETWORK === "live"
        ? Network.Main
        : Network.Rinkeby,
    apiKey: OPENSEA_API_KEY,
  },
  (arg: string) => console.log(arg)
);

async function main(): Promise<any> {
  const OpenSeaAsset = await seaport.api.getAsset({
    tokenAddress: CONTRACT_ADDRESS,
    tokenId: TOKEN_ID,
  });

  console.log(OpenSeaAsset);

  // list in 10 seconds
  const listingTime = Math.round(Date.now() / 1000) + 10;
  // expires in 24 hours
  const expirationTime = listingTime + 60 * 60 * 24;

  const orderArgs = {
    asset: { ...OpenSeaAsset, schemaName: "ERC1155" },
    OWNER_ADDRESS,
    startAmount: 1.2,
    listingTime,
    expirationTime,
  };

  const listing = await seaport.createSellOrder(orderArgs);

  console.log(listing);
}

main();