Now open: ERC-1155 marketplace
Semi-fungible collectibles are now on OpenSea
Today, OpenSea is announcing a new type of tradable digital assets on the marketplace: ERC-1155 items. In short, these are like ERC-721 items, but they have different behavior and more flexibility, which we’ll explain below. It’s a new Ethereum token standard and a new type of dapp on OpenSea!
ERC-1155 items have been tradable on OpenSea for a while now (there are over 200,000 that you can find already), but today they get the full attention that they deserve. Let’s start with what’s new in 1155. Then we’ll explain how you can get started trading, which games are already supported (17 so far!), and how developers can make 1155-compliant dapps!
What is ERC-1155 and What’s New
The ERC-1155 token standard provides a way to make one smart contract govern almost an unlimited number of tokens — technically, 2²⁵⁶ token types with up to 2²⁵⁶ copies of each. Additionally, each token is semi-fungible. Unlike ERC-721 non-fungible tokens (NFTs), which can only be owned by one address each, semi-fungible means:
- Each token type can be owned by multiple addresses
- One address can own multiple copies of each token
This expands the design space for building game economies and provides efficiency benefits as well. ERC-1155 is a result of the combined efforts of multiple companies working together to achieve these two goals, including Enjin, Horizon Games, and The Sandbox.
What’s needed now is a marketplace for the (at the time of writing) 208,319 new semi-fungible assets on Ethereum! And that’s what’s here today:
How to Trade ERC-1155 Tokens on OpenSea
Check out your OpenSea account page to see which items you already own, or visit the supported collections on OpenSea (listed below) to buy one.
To sell an ERC-1155 item, it’s as simple as clicking Sell, and then specifying the total price and quantity you want to sell. If you specify an end date, the price will decline to the amount you want until the end date is reached, and then your listing will be automatically cancelled (expired) for free.
You only have to pay gas the first time do you sell an item (which may include approving the token for trading). If you want to sell for Enjin ENJ, Sandbox SAND, or another payment token, click the dropdown below and set your price:
As with other tokens on OpenSea, you can place offers on 1155 items by clicking “Make an Offer” on the item’s page. Offers are non-binding, but because an item can have multiple owners now and any owner can accept it for you, many people will consider your offer at once!
ERC-1155 Games on OpenSea
Even before this official launch announcement, there are already 17 games on OpenSea using mainnet ERC-1155 contracts, and many are already ranked in the top fifteen dapps by volume. Here’s a full list, with many more to come! Special thanks to all of them for working with us to make a great marketplace experience.
Age of Rust | OpenSea
Year 4424: The search begins for new life on the other side of the galaxy. Explore abandoned space stations, mysterious…
Alterverse | OpenSea
Start your adventure aboard a Disrupter Ship exploring and raiding as you go. As new worlds are discovered, you'll be…
Bitcoin Hodler | OpenSea
Discover the unpredictable crypto space in this arcade style adventure and earn blockchain based assets and rewards…
Cats In Mechs | OpenSea
Cataria V is the native home of the Mau and the only planet where Catmint grows naturally. "Mint," as it is commonly…
Crypto Fights | OpenSea
Start as a low level fighter and win matches to earn XP and gold in this 3D fighting RPG! Imagine a turn based street…
Cryptonom | OpenSea
Search for Cryptonom, or NOMs for short, in varied environments, and build the team that fits your own playing style…
Dissolution | OpenSea
Experience tactical FPS combat in a cutthroat universe ravaged by an ongoing war of extinction between humanity and AI…
Dragon Riders of Kriptomat | OpenSea
The Dragon Riders of Kriptomat is a blockchain based rewards program that gives you the complete gamified experience of…
Dyverse | OpenSea
Through the Dyverse, you can collect and trade 3D characters that you can use to create VR/AR and social content…
Forest Knight | OpenSea
Build your dream team and go on an adventure through the fantasy world of Chronville! Explore, grind, and fight for…
Forgotten Artifacts | OpenSea
There are rumors that some of the most sought after artifacts are hidden in the depths of various dungeons. Hack and…
Kingdom Karnage | OpenSea
Kingdom Karnage is a trading card game with animated turn based combat. Battle your way through a campaign dedicated to…
Matterborn | OpenSea
Jump into this sci-fi trading card game and win using Enerjie and "Architects" to deplete your opponent's momentum…
9 Lives Arena | OpenSea
9Lives Arena is a competitive PvP RPG! Build your warrior with skills from different times and regions and head into…
Rebounce | OpenSea
ReBounce is a fast-paced hyper-casual arcade game. Achieve a high score by throwing the ball against the wall while…
Space Misfits | OpenSea
Space Misfits is a 3D Low Poly Space Sandbox MMO. As a sandbox game, players can decide their own fate in-game. Become…
Spirit Clash | OpenSea
Spirit Clash is a battle for supremacy. You must clash your way through the three spiritual cores of Mind, Body, and…
The Six Dragons | OpenSea
Welcome to The Six Dragons, the first Blockchain-powered Open World RPG! The game features a huge procedurally…
War of Crypto | OpenSea
Collect, customize and strengthen your very own unique heroes to battle a ruthless faction determined to control the…
You can also see these games with the “new” label on the OpenSea rankings page, ranked by weekly volume: https://opensea.io/rankings.
Information for Developers
Interested in deploying an ERC-1155 contract on OpenSea? If you already have an 1155 contract on mainnet or the Rinkeby testnet, there’s a chance that OpenSea automatically discovered your items! You can visit them on their owners’ account pages or at
opensea.io/assets/TOKEN_ADDRESS/TOKEN_ID, where the
TOKEN_ID is the base-ten version of your token id.
You can also use the Get Listed flow to have OpenSea re-crawl the items and add them to the marketplace:
Building on Kovan or some other testnet?
Contact us in the #developers channel on Discord! We’ll help get you set up.
Don’t have a contract yet?
What’s Coming Next
Crowdsales, gas-free pre-sales, and whitelisted airdrops using ERC-1155! Stay tuned using any of the following channels, ranked by signal-to-noise ratio ;)