transferFrom, approve, safeTransferFrom function are payable function in the ERC721 Standard，but openzeppelin inplements those function are public

XdpCs · March 13, 2024, 12:52pm

Can you explain to me the reasoning behind implementing it in this particular way?

OpenZeppelin/openzeppelin-contracts/blob/8cc7f2dcbf368f2a7ea491389dae41f01c16e352/contracts/token/ERC721/ERC721.sol#L159


      
          /**
           * @dev See {IERC721-safeTransferFrom}.
           */
          function safeTransferFrom(address from, address to, uint256 tokenId) public {
              safeTransferFrom(from, to, tokenId, "");
          }
          
          /**
           * @dev See {IERC721-safeTransferFrom}.
           */
          function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory data) public virtual {
              transferFrom(from, to, tokenId);
              ERC721Utils.checkOnERC721Received(_msgSender(), from, to, tokenId, data);
          }
          
          /**
           * @dev Returns the owner of the `tokenId`. Does NOT revert if token doesn't exist
           *
           * IMPORTANT: Any overrides to this function that add ownership of tokens not tracked by the
           * core ERC-721 logic MUST be matched with the use of {_increaseBalance} to keep balances
           * consistent with ownership. The invariant to preserve is that for any address `a` the value returned by

ref: https://eips.ethereum.org/EIPS/eip-721

Amxx · March 18, 2024, 9:37am

For anyone curious, pointers to the relevant discussions can be found here https://github.com/OpenZeppelin/openzeppelin-contracts/issues/4950

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transferFrom, approve, safeTransferFrom function are payable function in the ERC721 Standard，but openzeppelin inplements those function are public

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