# Buy an NFT from a marketplace

### Prerequisites

Before getting started, make sure you have the following ready:

1. [Create a Ternoa](/getting-started/wallets/ternoa-wallet.md) account with [Alphanet CAPS](broken://pages/ej9gceaLIhCN2PgUBh42)
2. Install and set up your editor of choice (we will use Visual Studio Code \[VSC] in this tutorial)
3. Install [NodeJS v.14+](https://nodejs.org/en/download/) & NPM
4. [Install & initialize Ternoa-JS](/build-1/javascript/ternoa-js-library-utilities/installation-and-initialization.md)

### Buy an NFT on a marketplace using Ternoa-JS

This function buys a listed-for-sale NFT on a marketplace on the Ternoa chain. It returns an object promise containing the NFTSoldEvent provided by the Ternoa blockchain.

{% hint style="info" %}
Use your own account by updating the `//TernoaTestAccount` with your account seed when retrieving the keyring from the example below. **Replace the NFT\_ID** with the listed NFT to buy.
{% endhint %}

```typescript
import {
    buyNft,
    initializeApi,
    getKeyringFromSeed,
    WaitUntil,
} from "ternoa-js";

const buyNft = async () => {
    try {
        await initializeApi();
        const keyring = await getKeyringFromSeed("//TernoaTestAccount");
        const NFT_ID = // update with the nft id you want to buy.
        const res = await buyNft(
            NFT_ID,
            keyring,
            WaitUntil.BlockInclusion
        );
        console.log(`NFT id: ${res.nftId} bought for ${res.listedPriceRounded}CAPS on marketplace ${res.marketplaceId}.`);
    } catch (e) {
        console.error(e);
    }
};
```

#### The expected params

```markdown
`nftId`: NFT Id of the NFT to buy.
`keyring`: The provided keyring (containing the address) will be used to sign the transaction and pay the execution fee.
`waitUntil`: WaitUntil defines at which point we want to get the results of the transaction execution: BlockInclusion or BlockFinalization.
```

#### Response

The response provided from the blockchain event includes all the information below according to the parameters provided when buying an NFT.

```markdown
`nftId`: NFT id bought.
`marketplaceId`: Marketplace id where the NFT was listed for sale.
`buyer`: The NFT's new owner.
`listedPrice`: The sale price of the NFT as a string corresponding to the value in a big number.
`listedPriceRounded`: The sale price of the NFT as a number.
`marketplaceCut`: The marketplace commission fee on the NFT sale as a string corresponding to the value in a big number.
`marketplaceCutRounded`: The marketplace commission fee on the NFT sale as a number.
`royaltyCut`: The NFT creator royalty fee on the NFT sale as a string corresponding to the value in a big number.
`royaltyCutRounded`: The NFT creator royalty fee on the NFT sale as a number.
```

### Support

If you face any trouble, feel free to reach out to our community engineers in our [Discord](https://discord.gg/fUmBkPpnRu).


---

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