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About contract acceptance erc721

2022-02-04 00:13:04 Q & A of Denglian community


Copy the above code to remix Back inside , The error message is :

DeclarationError: Undeclared identifier._registerInterface(IERC721Receiver.onERC721Received.selector);

register interface after . Why still report an error ?

How to understand registerInterface?

How to write is right ?

Other answers 1:

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author[Q & A of Denglian community],Please bring the original link to reprint, thank you.

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