Analysis and Operation Guide for Aptos on-chain NFT Cross Chain Technology

NFTs on the Aptos blockchain now have cross-chain functionality with other blockchains. This groundbreaking development brings new opportunities for users and creators. This article will delve into the technical principles of NFT cross-chain, supported blockchain networks, and specific operational steps.

How NFT Cross-Chain Bridges Work

The NFT cross-chain bridge allows for the transfer of NFTs between supported blockchains while retaining their metadata. The cross-chain process includes the following steps:

1. The original NFT is locked in the cross-chain bridge smart contract.
2. Mint equivalent wrapped NFT on the target chain
3. The packaging NFT should be consistent with the original NFT in terms of name, appearance, and functionality.

The uniqueness of packaged NFTs lies in the fact that they can be sent back to the original chain and unlock the original NFT. This means that, for example, an NFT originating from Aptos can be cross-chain to Ethereum, traded on a trading platform, and then returned to Aptos by the new owner.

Supported Blockchain Networks

Currently, users can cross-chain NFTs from multiple blockchain networks to Aptos, including but not limited to:

• Arbitrum
• Aurora
• Avalanche
• BSC
• Celo
• Ethereum
• Fantom
• Karura
• Klaytn
• Moonbeam
• Oasis
• Optimism
• Polygon
• Solana

It is worth noting that some well-known high-value NFTs, such as Cryptopunks and Beeple works, have been successfully transferred to Aptos using cross-chain technology.

The Infrastructure Behind Cross Chain Technology

The implementation of cross-chain functionality relies on an interoperability protocol that provides a universal messaging layer for projects. This technology connects multiple blockchain networks, including major public chains such as Ethereum, Solana, Polygon, Avalanche, and emerging public chains including Aptos.

The protocol achieves cross-chain functionality by sending messages between different chains. These messages are observed and validated by a network of nodes, and upon successful validation, they are submitted to the target chain for processing. This simple and efficient messaging mechanism enables cross-chain applications (xDapps) to transfer cross-chain assets (xAssets) or access cross-chain data (xData) across different networks.

Currently, the total transaction volume of the protocol has exceeded 35 billion USD, processing millions of messages daily, with over 60 protocols built on its messaging layer.

Aptos on-chain NFT cross-chain operation guide

1. Access the NFT Cross Chain Bridge page
2. Select the source chain and target NFT
3. Select the NFT to be transferred cross-chain and confirm the wallet signature.
4. After completing the cross-chain operation, the NFT will appear on the target chain.
5. If you need to cross back the NFT to the original chain, you can use the "redeem" function.

By following these simple steps, users can easily transfer NFTs across different blockchains, opening up new possibilities for the circulation and application of NFTs.

With the continuous development and improvement of cross-chain technology, we can expect to see more innovative NFT application scenarios, as well as a more prosperous cross-chain ecosystem. This not only provides NFT creators and collectors with a broader market but also brings new opportunities for interoperability and value circulation in the entire blockchain industry.