How to retrieve a listed for sale NFT using Ternoa Indexer

Ternoa indexer is a record of the Ternoa Chain data. You can query data for some specific entities (NFT, Collection, Marketplace(...)) using graphql. In this exemple, we use the graphql-request library.

You first need to prepare a stringified query to get NFT data from a specific marketplace id, as we did in the query(id) function. Do not hesitate to adapt the information you require in your query. You can check all the fields queryable for the NftEntity.

When the query is ready, you can make the request to our indexer by providing both the indexer endpoint and the query. To check if the NFT is listed for sale, the marketplaceId field should not be null, isListed should be true and a timestampList should be filled.

import { request, gql } from "graphql-request";

const NFT_ID = 0;
const query = (id: number) => gql`
    {
      nftEntity(id: "${id}") {
        nftId
        owner
        marketplaceId
        isListed
        timestampList
        typeOfListing
        price
        priceRounded
      }
    }
`;

const getNftData = async () => {
    try {
        const response = await request<{ nftEntity: NFTType }>(
            "https://indexer-alphanet.ternoa.dev",
            query(NFT_ID)
        );
        console.log(response);
    } catch (error) {
        console.error(error);
    }
};

type NFTType = {
    nftId: string;
    owner: string;
    marketplaceId: string | null;
    isListed: boolean;
    typeOfListing: string | null;
    price: string | null;
    priceRounded; number | null;
    timestampList: Date | null;
};

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