Secondary Sales / Peer to Peer Trading is facilitated by our Marketplace API. Users will be able to purchase and sell ERC721/1155s between one another via the marketplace SDK in Unity; paying in cryptocurrency (with currency abstraction enabled by default) or via credit card where available.

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Understanding the Basics

Before diving into the details behind the marketplace, let’s first establish an understanding of some basic concepts.

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Orders

There are two basic types of Orders: listings and offers. Listings indicate an intent to sell a given amount of a collectible (where a collectible is the combination of a Chain, contract address, and token id) at a certain price per collectible in a given Currency. Once created, listings can be queried and bought by another user. Offers indicate an intent to purchase a given amount of a collectible at a certain price per collectible in a given Currency. Once created, offers can be queried and sold by another user. In order to create, fill, or cancel an Order, you must use the appropriate Generate_Method_Transaction call based on which method you are using. This will give you a Step[] that can be submitted as a transaction in order to perform the desired action. More on this in the Filling Orders section of the docs.

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Currencies

A Currency is an ERC20 token or native token that has been whitelisted for a given project and Chain for use in the marketplace. You can add a new currency to the whitelist for you project by adding it as a custom currency when creating a white-label marketplace in the Sequence Builder. Please see this guide. All orders must be priced in whitelisted currencies or they will be ignored by the API.

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Collections

A Collection is a group of Collectibles, identified by an ERC721 or ERC1155 contract address.

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Collectibles

A Collectible is a specific instance of a Collection, identified by the ERC721/ERC1155 contract address and the token id.