# Validate NFT Order

### SellNFTByERC20

{% code overflow="wrap" lineNumbers="true" %}

```ts
// Step 1. getAccount
const {accInfo} = await LoopringAPI.exchangeAPI.getAccount({
  owner: LOOPRING_EXPORTED_ACCOUNT.address,
});
console.log("accInfo:", accInfo);

// Step 2. eddsaKey
const eddsaKey = await signatureKeyPairMock(accInfo);
console.log("eddsaKey:", eddsaKey.sk);

// Step 3. apiKey
const {apiKey} = await LoopringAPI.userAPI.getUserApiKey(
  {
    accountId: accInfo.accountId,
  },
  eddsaKey.sk
);
console.log("apiKey:", apiKey);

// Step 4. storageId
const storageId = await LoopringAPI.userAPI.getNextStorageId(
  {
    accountId: accInfo.accountId,
    sellTokenId: LOOPRING_EXPORTED_ACCOUNT.nftTokenId,
  },
  apiKey
);
console.log("storageId:", storageId);
// let hash: any = new BN(nftId,'hex')
// hash = toHex(hash);//new BigInteger(sha256(nftId.toString()).toString(), 16)

// Step 5. submitNFTValidateOrder
const response = await LoopringAPI.userAPI.submitNFTValidateOrder({
  request: {
    exchange: LOOPRING_EXPORTED_ACCOUNT.exchangeAddress,
    accountId: accInfo.accountId,
    storageId: storageId.orderId,
    sellToken: {
      tokenId: LOOPRING_EXPORTED_ACCOUNT.nftTokenId,
      nftData: LOOPRING_EXPORTED_ACCOUNT.nftData,
      amount: "1",
    },
    buyToken: {
      tokenId: 1,
      amount: "10000000000000",
    },
    allOrNone: false,
    fillAmountBOrS: false,
    validUntil: LOOPRING_EXPORTED_ACCOUNT.validUntil,
    maxFeeBips: 1000,
  },
  web3,
  chainId: sdk.ChainId.GOERLI,
  walletType: sdk.ConnectorNames.Unknown,
  eddsaKey: eddsaKey.sk,
  apiKey: apiKey,
});

console.log("sellNFT NFTOrderRequestV3:", response);
```

{% endcode %}

### BuyNFTByERC20

{% code overflow="wrap" lineNumbers="true" %}

```ts
 // Step 1. getAccount
const {accInfo} = await LoopringAPI.exchangeAPI.getAccount({
  owner: LOOPRING_EXPORTED_ACCOUNT.address,
});
console.log("accInfo:", accInfo);

// Step 2. eddsaKey
const eddsaKey = await signatureKeyPairMock(accInfo);
console.log("eddsaKey:", eddsaKey.sk);

// Step 3. apiKey
const {apiKey} = await LoopringAPI.userAPI.getUserApiKey(
  {
    accountId: accInfo.accountId,
  },
  eddsaKey.sk
);
console.log("apiKey:", apiKey);

// Step 4. submitNFTValidateOrder
const storageId = await LoopringAPI.userAPI.getNextStorageId(
  {
    accountId: accInfo.accountId,
    sellTokenId: LOOPRING_EXPORTED_ACCOUNT.nftTokenId,
  },
  apiKey
);
console.log("storageId:", storageId);

const response = await LoopringAPI.userAPI.submitNFTValidateOrder({
  request: {
    exchange: LOOPRING_EXPORTED_ACCOUNT.exchangeAddress,
    accountId: accInfo.accountId,
    storageId: storageId.orderId,
    sellToken: {
      tokenId: 1,
      amount: "10000000000000",
    },
    buyToken: {
      tokenId: LOOPRING_EXPORTED_ACCOUNT.nftTokenId,
      nftData: LOOPRING_EXPORTED_ACCOUNT.nftData,
      amount: "1",
    },
    fillAmountBOrS: true,
    allOrNone: false,
    validUntil: LOOPRING_EXPORTED_ACCOUNT.validUntil,
    maxFeeBips: 100,
  },
  web3,
  chainId: sdk.ChainId.GOERLI,
  walletType: sdk.ConnectorNames.Unknown,
  eddsaKey: eddsaKey.sk,
  apiKey: apiKey,
});
```

{% endcode %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs-protocol.loopring.io/counterfactual-nft/sdk-guides/trade-nft/validate-nft-order.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.