NEP4::check_access isn't to spec

[joshuajbouw]

Been looking through the library and had noticed that the NFT example technically isn't to spec on the check_access method.

As per spec it states:
export function check_access(token_id: TokenId): boolean;

which translates to:
fn check_access(&self, token_id: TokenId) -> bool;
in Rust.

However, the NFT example has fn check_access(&self, account_id: AccountId) -> bool; as its method.

References:

• NEP4 Spec
• Near NFT example

[joshuajbouw]

Closing this for now as I realise that NEP-141 is the standard.

[alexauroradev]

NEP-141 is a standard for fungible tokens. NEP-4 was never accepted. And now there's a new standard for NFTs, though I don't know what is the number for it. @mikedotexe owns this.

[joshuajbouw]

NEP-171