NFT On-Chain Royalties (EIP-2981) 2

Question 1

What does the royaltyInfo function in EIP-2981 return?

Accepted Answer

The receiver address and royalty amount

Answer

Only the royalty percentage

Answer

The token owner and price

Answer

A boolean indicating royalty support

Question 2

Which two parameters does royaltyInfo take as inputs?

Accepted Answer

tokenId and salePrice

Answer

owner and amount

Answer

receiver and percentage

Answer

tokenURI and buyer

Question 3

EIP-2981 expresses royalties in what unit relative to sale price?

Accepted Answer

An absolute amount derived from the sale price you pass in

Answer

A fixed wei amount

Answer

Always a percentage stored as a string

Answer

USD cents

Question 4

How is EIP-2981 support advertised to other contracts?

Accepted Answer

Via ERC-165 supportsInterface with the 2981 interface ID

Answer

Through an on-chain registry contract

Answer

By emitting a RoyaltyEnabled event

Answer

It cannot be detected programmatically

Question 5

What is the ERC-165 interface ID for EIP-2981?

Accepted Answer

0x2a55205a

Answer

0x80ac58cd

Answer

0x01ffc9a7

Answer

0x5b5e139f

Question 6

Does EIP-2981 enforce that marketplaces actually pay the royalty?

Accepted Answer

No, it only signals the amount; payment enforcement is up to the marketplace

Answer

Yes, the standard reverts sales that skip royalties

Answer

Yes, the EVM blocks transfers without payment

Answer

Only on Ethereum mainnet

Question 7

EIP-2981 can be implemented for which token standards?

Accepted Answer

Both ERC-721 and ERC-1155

Answer

Only ERC-721

Answer

Only ERC-20

Answer

Only ERC-1155