ownerOf

The ownerOf method is exclusive to the ERC-721 token standard and serves the purpose of identifying the current owner of a particular non-fungible token (NFT). By providing a unique token identifier, this method returns the Ethereum address associated with the token's current ownership. This functionality is crucial for numerous operations and validations concerning ownership within the ERC-721 ecosystem. The method is encapsulated within the ERC721Instance object, which can be accessed through appropriate functions provided by client libraries like ZkyugaClient or similar ones.

Function Signature

async ownerOf(tokenId: string): Promise<string>

Parameters

Parameter	Type	Description
tokenId	string	The unique identifier corresponding to an ERC-721 token for which you wish to determine the current owner.

Returns

• A Promise resolving to the Ethereum address string representing the current owner of the specified token.

Usage Example

Begin by initializing the ERC-721 token contract of your choice:

const erc721 = zkyugaClient.getERC721Instance("your ERC-721 contract address here");

Proceed to invoke the ownerOf method with a specific token ID:

const tokenId = "1008"; // Example token ID
const ownerAddress = await erc721.ownerOf(tokenId);
console.log(`The owner of token ID ${tokenId} is: ${ownerAddress}`);

Notes

• If you attempt to query the owner of a non-existent or unminted token ID, the method may throw an error. Always ensure the validity of the token ID and consider implementing error handling mechanisms in your code.

• The ownerOf method plays a fundamental role in the ERC-721 standard, being extensively used in various decentralized applications (dApps) to verify ownership before executing specific actions.

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