NFT Smart Contract Development: ERC-721 vs ERC-1155

Frequently Asked Questions

01.Which NFT standard is best for cross-chain bridging?

ERC-1155 is generally easier and cheaper to bridge at scale because of its batching capabilities. However, ERC-721 is supported by nearly every bridge protocol due to its historical dominance in high-value collections.

02.How does EIP-2981 (Royalty Standard) fit into NFT development?

Regardless of using ERC-721 or ERC-1155, always implement EIP-2981. This is the standard for on-chain royalty signalling, ensuring that marketplaces can automatically reward creators across different platforms and Layer 2s.

03.Can I convert an ERC-721 collection to ERC-1155 after deployment?

No. The standards have fundamentally different internal state storage and data structures. You would need to wrap your ERC-721 tokens into a new ERC-1155 contract, which incurs significant gas costs and complicates the user experience. Choose the correct standard before deployment.

04.Can an ERC-1155 NFT own an ERC-721 NFT?

Yes, by using an ERC-6551 Token Bound Account. The ERC-1155 token ID can be assigned a smart account address, which then becomes the owner of any ERC-721 token sent to it, creating a nested asset relationship.