Cross-chain Token Claim

Objective

Allow Solana users to claim Bolarity Tokens by verifying NFT ownership via submitted proofs from Ethereum.

Overview

• Solana Side: Verifies ownership proofs and manages token claims.

• Proof Recording: Stores and tracks ownership proofs to prevent duplicate claims.

Key Modules

NFT Verification & Token Claim Contract (Solana)

• Parses Wormhole messages to extract:

  • Proxy account address

  • NFT contract address

  • Token ID

• Records proofs using Solana PDA storage (ProofRecord).

• Key functions:

  • store_proof(proxy_account: Pubkey, nft_contract: Pubkey, token_id: u64, solana_receiver: Pubkey)

  • set_approved_nft(nft_contract: Pubkey, status: bool)

  • validate_nft(nft_contract: Pubkey) -> bool

  • claim_tokens(solana_receiver: Pubkey, nft_contract: Pubkey, token_id: u64)

  • is_recorded(nft_contract: Pubkey, token_id: u64) -> bool

ProofRecord Design

• A Solana PDA to securely record proofs.

• Fields:

  • proxy_account

  • nft_contract

  • token_id

  • solana_receiver

  • claimed

Detailed Process

Step 1: Proxy Account Holds NFT

• Proxy mints an NFT on Ethereum and holds ownership.

Step 2: Proof Submission

• Proxy account submits NFT ownership proof to the relay contract.

Step 3: Cross-Chain Proof Transmission

• Relay contract sends ownership proof to Solana via Wormhole.

Step 4: Solana Records Proof

• Solana contract parses and stores the proof if not already recorded.

Step 5: Token Distribution

• After verification, Bolarity Tokens are distributed to the user.

• Prevents duplicate claims by updating ProofRecord.

Summary of Requirements

• ✅ Supports multiple NFT collections.

• ✅ Proxy account handles Ethereum-side minting.

• ✅ Proof relay via Wormhole ensures ownership verification.

• ✅ Solana contract records proof securely.

• ✅ Solana contract distributes tokens based on valid proofs.

• ✅ Prevents double claims.