Bridging NFTs across layers

By Pavel Sinelnikov

Problem

A problem faced within the Ethereum blockchain as well as Layer 2s is the segmentation of assets, especially NFTs. When an NFT is created on a Layer 2, the NFT is stuck on that layer. This leads to the problem of NFT silos, where NFT assets on Layer 2 cannot be withdrawn to Layer 1. Having a way to create and transfer NFTs across multiple layers is important in order to introduce NFT applications to Layer 2s.

Solution

Create a way to easily transfer NFTs across layers and reduce the gas requirements by minting the NFTs on Layer 2. This lets the user decide when they would like to withdraw their NFTs to Layer 1.

Overview Diagram

NFT Metis-Initialization — Smart Contracts798×796 33.1 KB

Initializing the NFT Contracts

1. The Owner will provision the L1_NFT_Collection with the deployed L2_NFT_Collection, specifying:

• Address of the L2_NFT_Collection
• Chain ID of the L2_NFT_Collection
• Location of the NFT, mapping of…