Seaport is a new marketplace protocol for safely and efficiently buying and selling NFTs. This is a JavaScript library intended to make interfacing with the contract reasonable and easy.
This is a JavaScript library to help interface with Seaport. It includes various helper methods and constants that makes interfacing with Seaport easier. These include creating orders, fulfilling orders, doing the necessary balance and approval checks, and more. We recommend taking a look at the Seaport docs to get a better understanding of how the Seaport marketplace works.
We recommend using nvm to manage Node.js versions. Execute nvm use, if you have nvm installed.
Then, in your project, run:
npm install --save @opensea/seaport-js
Instantiate your instance of seaport using your ethers provider:
import { Seaport } from "@opensea/seaport-js";
const provider = ethers.getDefaultProvider();
const seaport = new Seaport(provider);Look at the relevant definitions in seaport.ts in order to see the different functionality this library offers.
Many of the main core flows return use cases. What this means is that if you were to create an order (a la createOrder), the library helps perform the necessary balance and approval checks based on the offer of the order being created. If the offerer requires approvals on one asset contract, the actions field of the use case would contain an approval action that the user should execute first in order for the trade to succeed in the future.
const offerer = "0xf39fd6e51aad88f6f4ce6ab8827279cfffb92266";
const fulfiller = "0x70997970c51812dc3a010c7d01b50e0d17dc79c8";
const { executeAllActions } = await seaport.createOrder({
offer: [
{
itemType: ItemType.ERC721,
token: "0x8a90cab2b38dba80c64b7734e58ee1db38b8992e",
identifier: "1",
}
],
consideration: [
{
amount: parseEther("10").toString(),
recipient: offerer,
}
],
accountAddress: offerer
});
const order = await executeAllActions();
const { executeAllActions: executeAllFulfillActions } = await seaport.fulfillOrder({
order,
accountAddress: fulfiller,
});
const transaction = executeAllFulfillActions()
const offerer = "0xf39fd6e51aad88f6f4ce6ab8827279cfffb92266";
const fulfiller = "0x70997970c51812dc3a010c7d01b50e0d17dc79c8";
const { executeAllActions } = await seaport.createOrder({
offer: [
{
amount: parseEther("10").toString(),
// WETH
token: "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2"
},
],
consideration: [
{
itemType: ItemType.ERC721,
token: "0x8a90cab2b38dba80c64b7734e58ee1db38b8992e",
identifier: "1",
recipient: offerer
},
],
accountAddress: offerer
});
const order = await executeAllActions();
const { executeAllActions: executeAllFulfillActions } = await seaport.fulfillOrder({
order,
accountAddress: fulfiller.address,
});
const transaction = executeAllFulfillActions()
See the contributing guide for detailed instructions on how to get started with this project.