Mastering Blockchain Programming with Solidity

The transferFrom function

The transferFrom() function is a public function, used to transfer the given tokenId from the owner's account to the receiver's account. For this function to work, the approval must have been given previously by the owner to the address of the caller of this function.

This function takes the following arguments:

• from: The address of the owner who currently owns the given NFT
• to: The address of the receiver of the NFT
• tokenId: The tokenId of the NFT that is to be transferred to the to address

Let's look at the transferFrom() function code:

function transferFrom(address from, address to, uint256 tokenId) public {    require(_isApprovedOrOwner(msg.sender, tokenId));    _transferFrom(from, to, tokenId);}

As you can see in ...