Cross-chain NFT Minting

Objective

Implement NFT minting on the Ethereum side using proxy accounts to represent Solana users.

Overview

• EVM Side: Users mint NFTs via a proxy account on Ethereum.

• Proxy Representation: Solana users authorize proxy accounts to mint NFTs on their behalf.

• Multi-NFT Support: Multiple NFT collections (e.g., NFT1, NFT2) are supported.

Key Modules

NFT Contract (ERC-721)

• Standard ERC-721 smart contract.

• Proxy accounts mint NFTs instead of users.

• Main functions:

  • mint()

  • ownerOf()

  • transferFrom()

Relay Contract (NFT Proof Submission)

• Verifies NFT ownership by proxy accounts.

• Relays proof to Solana using Wormhole messaging.

• Key functions:

  • sendProof(address nftContract, uint256 tokenId, address solanaReceiver)

  • verifyOwnership(address nftContract, address proxyAccount, uint256 tokenId)

Wormhole Cross-Chain Messaging

• Relays ownership proof from Ethereum to Solana.

• Message content:

  • Proxy account address

  • NFT contract address

  • Token ID

  • Solana recipient address