This section demonstrates how to register an IP Asset as a derivative of another. There are generally three methods of registering an IPA remix:

1. Link an existing IPA as a derivative of a "parent" IPA using a License Token.
2. Link an existing IPA as a derivative of a "parent" IPA directly.

Prerequisites

• Setup the client object.
• The "parent" IPA must be registered.
• The "child" IPA must be registered.

Register Derivative using License Token

Additional Prerequisites

• An already minted License Token from the "parent" IPA. Learn how to mint a License Token here.

If you already have a License Token, it is easier to register a derivative this way. We can register a child IPA as a derivative of a parent IPA by calling client.ipAsset.registerDerivativeWithLicenseTokens() like so:

const response = await client.ipAsset.registerDerivativeWithLicenseTokens({
  childIpId: "0xC92EC2f4c86458AFee7DD9EB5d8c57920BfCD0Ba",
  licenseTokenIds: ["5"], // array of license ids relevant to the creation of the derivative, minted from the parent IPA
  txOptions: { waitForTransaction: true }
});

console.log(`Derivative IPA linked to parent at transaction hash ${response.txHash}`)

export type RegisterDerivativeWithLicenseTokensRequest = {
  licenseTokenIds: string[];
  childIpId: Address;
  txOptions?: TxOptions;
};

export type RegisterDerivativeWithLicenseTokensResponse = {
  txHash: string;
};

Register Derivative Directly

You can also register a derivative directly, without needing a License Token. There is no real difference between registerDerivativeWithLicenseTokens (above) and registerDerivative (below) except that the former requires an already minted License Token and the latter is a convenient function that handles it for you.

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Quick Note

Remember that once License Terms are attached to an IP Asset, it becomes public to register a derivative with those terms, which is why you don't necessarily need a License Token first. Read more on that here .

const response = await client.ipAsset.registerDerivative({
  childIpId: "0xC92EC2f4c86458AFee7DD9EB5d8c57920BfCD0Ba",
  parentIpIds: ["0xC92EC2f4c86458AFee7DD9EB5d8c57920BfCD0Ba"],
  licenseTermsIds: ["5"],
  txOptions: { waitForTransaction: true }
});

console.log(`Derivative IPA linked to parent at transaction hash ${response.txHash}`)

export type RegisterDerivativeRequest = {
  childIpId: Address;
  parentIpIds: Address[];
  licenseTermsIds: string[];
  licenseTemplate?: Address;
  txOptions?: TxOptions;
};

export type RegisterDerivativeResponse = {
  txHash?: string;
  childIpId?: Address;
};