SNIP-3: Non-fungible token specification

[moodysalem]

Discuss SNIP-3

[moodysalem]

I would like to send a change to remove safeTransferFrom from the specification.

safeTransferFrom is dual purpose, it both makes sure the receiver can receive the NFT as well as calls the receiver to allow for actions to be executed on receive. However:

• The former is not done with ERC20, for which there is significantly more value transferred on a daily basis. Typically validation like this should happen off-chain in wallets. Doing this on-chain is most likely losing more money to wasted gas than it saves in accidental transfers.
• Both the latter and the former is solved by native account abstraction. Simply transfer the NFT and then call the contract in one transaction.

[moodysalem]

My implementations of SNIP-3 will not include safeTransferFrom. I encourage all integrators to avoid using this method for compatibility. My contract will still return true from supportsInterface for the relevant ERC-721 and SNIP-3 interface IDs.