NFT Marketplace Integration 4

Question 1

When a marketplace enforces on-chain royalties via an operator filter registry, what does it restrict?

Accepted Answer

Transfers to marketplaces that do not honor creator royalties

Answer

Operator filter registries block approved operators (marketplaces) that bypass royalties, enforcing payment at the transfer level.

Question 2

In a cross-chain NFT marketplace integration, what is a common method to represent an NFT on a destination chain?

Accepted Answer

Lock the original and mint a wrapped/bridged representation on the target chain

Answer

Bridges typically lock or escrow the original token and mint a corresponding wrapped version on the destination chain.

Question 3

Why should a marketplace integration validate the order signature on-chain during fulfillment?

Accepted Answer

To ensure the order was genuinely authorized by the seller and not forged

Answer

On-chain signature verification confirms the seller signed the exact order terms, preventing forged or tampered listings from executing.

Question 4

What problem does a 'nonce' per maker address solve in marketplace order management?

Accepted Answer

It allows bulk cancellation of all of a maker's open orders in one transaction

Answer

Incrementing a per-maker nonce invalidates all previously signed orders at once, enabling cheap mass cancellation.

Question 5

When displaying NFT metadata from tokenURI, why should an integration handle IPFS gateways carefully?

Accepted Answer

IPFS content may be slow or unpinned, so fallback gateways or pinning improve reliability

Answer

IPFS-hosted metadata can become unavailable if unpinned, so robust integrations use multiple gateways or pin content themselves.

NFT Development Practice Test