Bulk listing of ERC-1155s to OpenSea

0-readme.md

Bulk listing of ERC1155s to OpenSea

Prerequisites

• Node v14. opensea-js doesn't work with v16
• Alchemy and Opensea API keys
• Private key for your account. See https://metamask.zendesk.com/hc/en-us/articles/360015289632-How-to-Export-an-Account-Private-Key

Running script

The default ASSET is set as the Fractional ERC-1155 factory so it will work for all Fractional related ERC-1155s. Override it in your command if you're using a non-Fractional minted ERC-1155.

ALCHEMY_KEY="[redacted]" OPENSEA_KEY="[redacted]" ASSET_ID=1 PRICE="0.03" QUANTITY=1 PRIVATE_KEY="[redacted]" node bulk_list.js

All configurable values:

Variable	Description	Default
NETWORK	The Ethereum network to connect to (Mainnet or Rinkeby)	mainnet
ALCHEMY_KEY	Free or paid Alchemy API key
OPENSEA_KEY	OpenSea API key
ASSET	Contract address of the ERC1155 being listed	0xb2469a7dd9e154c97b99b33e88196f7024f2979e
ASSET_ID	ID of the ERC115 being listed
QUANTITY	Number of listings to make	1
PRICE	Price of each listing in ether
PRIVATE_KEY	Private key of your Ethereum account

The OpenSea API key is the most limiting factor since obtaining one is so difficult. You can request it [here](https://docs.opensea.io/reference/request-an-api-key) but it will likely take a few weeks if it's even approved.

bulk_list.js

const HDWalletProvider = require("@truffle/hdwallet-provider");
const opensea = require('opensea-js');
const { WyvernSchemaName } = require('opensea-js/lib/types');

const NETWORK = process.env.NETWORK === 'mainnet' ? 'mainnet' : 'rinkeby';
const ALCHEMY_KEY = process.env.ALCHEMY_KEY;
const OPENSEA_KEY = process.env.OPENSEA_KEY;
// All Fractional ERC1155s are under 0xb246...979e
const ASSET = process.env.ASSET || '0xb2469a7dd9e154c97b99b33e88196f7024f2979e';
const ASSET_ID = process.env.ASSET_ID;
const QUANTITY = process.env.QUANTITY || 1;
const PRICE = process.env.PRICE;
const PRIVATE_KEY = process.env.PRIVATE_KEY;

if (!ALCHEMY_KEY || !OPENSEA_KEY || !ASSET || !PRICE || !PRIVATE_KEY) {
    console.error("ALCHEMY_KEY, OPENSEA_KEY, ASSET, PRICE, or PRIVATE_KEY not defined");
    return;
}

const provider = new HDWalletProvider({
    privateKeys: [PRIVATE_KEY],
    providerOrUrl: 'https://eth-' + NETWORK + '.alchemyapi.io/v2/' + ALCHEMY_KEY,
    pollingInterval: 8000,
});

const seaport = new opensea.OpenSeaPort(provider, {
  networkName: NETWORK === 'mainnet' ? opensea.Network.Main : opensea.Network.Rinkeby,
  apiKey: OPENSEA_KEY,
});

(async () => {
    console.log("Creating sell order for %s of %s at %s each", QUANTITY, ASSET, PRICE);

    for (let i = 0; i < QUANTITY; i++) {
        try {
            const listing = await seaport.createSellOrder({
                asset: {
                    tokenAddress: ASSET,
                    tokenId: ASSET_ID,
                    schemaName: WyvernSchemaName.ERC1155,
                },
                accountAddress: provider.getAddress(0),
                startAmount: parseFloat(PRICE),
                quantity: 1,
            });
            console.log("Listed #%d", i);

        } catch (e) {
            console.error(e);
        }
    }

    provider.engine.stop();
})();