NFT On-Chain Royalties (EIP-2981) 5

Question 1

Before EIP-2981, why were royalties inconsistent across marketplaces?

Accepted Answer

Each marketplace used its own proprietary, off-chain royalty configuration

Answer

Royalties were banned on-chain

Answer

ERC-721 already enforced them

Answer

Gas costs made them impossible

Question 2

What is the primary benefit of storing royalty info on-chain via EIP-2981?

Accepted Answer

Any marketplace can read the same royalty data interoperably

Answer

It guarantees higher payouts

Answer

It removes gas fees

Answer

It prevents NFT transfers

Question 3

Which gas consideration favors a default royalty over per-token royalties?

Accepted Answer

A default avoids writing storage for every token

Answer

Per-token royalties are free to set

Answer

Defaults require more storage slots

Answer

Per-token data is never stored

Question 4

Can the royalty receiver address differ from the contract owner or NFT creator?

Accepted Answer

Yes, the receiver is set independently and can be any address

Answer

No, it must equal the contract owner

Answer

No, it must be the current token holder

Answer

Only if the token is burned

Question 5

What does it imply if a contract's supportsInterface returns false for 0x2a55205a?

Accepted Answer

The contract does not advertise EIP-2981 royalty support

Answer

Royalties are enforced at the protocol level

Answer

The contract is not an NFT

Answer

The royalty is 100%

Question 6

When migrating a collection's royalties, what is a safe pattern for updating the default fee?

Accepted Answer

Restrict _setDefaultRoyalty to an owner/admin role

Answer

Let any caller change it

Answer

Hardcode it with no setter

Answer

Store it off-chain only

Question 7

How does EIP-2981 interact with secondary-sale royalties on resales?

Accepted Answer

It provides the same royaltyInfo lookup on every resale, so each compliant sale can pay the receiver

Answer

It only applies to the first sale

Answer

It compounds the percentage each resale

Answer

It refunds prior royalties