Cross-Chain NFT Bridger

WHAT IT DOES

Cross-Chain NFT Bridger is a developer tool that lets you bridge NFTs across EVM chains using cross-chain NFT bridge contracts. NFTs (ERC-721 and ERC-1155 tokens) can be moved from one chain to another, enabling cross-chain ownership and interoperability. This tool reads your NFT ownership, collection metadata, bridge contract state, and destination chain parameters, then constructs and submits the bridge transaction. It provides a preview of the NFT details — collection, token ID, destination chain, recipient, and bridge fee — before you execute, enabling secure and transparent cross-chain NFT transfers. The tool handles NFT approvals and the bridge initiation call in a single transaction, simplifying the bridging process.

HOW TO USE

Connect your EVM wallet via the BGWallet bridge. Enter the NFT bridge contract address on the source chain, the NFT collection address, the token ID you want to bridge, the destination chain ID, and the recipient address on the destination chain (leave blank to use your own address). Optionally, enter the bridge fee — if left blank, the tool will attempt to auto-detect it. Click "Preview NFT Bridge" to see the bridge contract, collection, token ID, destination chain, recipient, bridge fee, and estimated gas cost. Review the details carefully. Click "Bridge NFT" to sign and broadcast the transaction. The tool provides a transaction hash for tracking and shows the bridge status.

TECHNICAL MECHANISM

The tool reads the NFT ownership from the collection contract using `ownerOf(tokenId)` (ERC-721) or `balanceOf(owner, tokenId)` (ERC-1155). It checks the bridge contract's fee using a view function like `bridgeFee()` or `getFee(destinationChain, collection)` if available. When executing, the tool first approves the bridge contract to transfer the NFT (using `approve` or `setApprovalForAll`), then calls the bridge contract's `bridgeNFT` or `sendNFT` function with the collection, token ID, destination chain, recipient, and fee. The tool uses the contract's ABI to encode the call and submits it via the connected wallet. The entire operation is atomic — if the approval or bridge call fails, the transaction reverts. The tool estimates gas using `estimateGas` and displays the estimated cost before execution.

WHAT IT CANNOT SEE

This tool cannot guarantee that the NFT will be successfully minted on the destination chain if the bridge network fails or the destination chain's collection contract changes before the message is processed. Cross-chain NFT bridges rely on off-chain relayers or validators that may experience delays, failures, or censorship. The tool cannot predict the status of the bridge network or the finality of the minting on the destination chain. Additionally, the tool cannot detect if the bridge has been paused, upgraded, or if the destination chain's collection contract has changed. Always monitor the bridge status separately and verify the NFT receipt on the destination chain. This tool is an aid for NFT bridging, not a guarantee that the NFT will arrive on the destination chain.

PLEASE NOTE

EVM chains only. This tool relies on the BGWallet connector and will not function on Solana, Tron, Starknet, SUI, TON, Aptos, Bitcoin, Cosmos, or XRP. The user is responsible for ensuring the supplied bridge contract address is correct and that the contract supports NFT bridging functions. The fee must be paid in the native token of the source chain — ensure you have sufficient balance. Always verify the bridge fee and recipient address before executing. Not all NFT collections are supported by every bridge — check your bridge's documentation for supported collections.