August 2019
Intermediate to advanced
486 pages
13h 52m
English
Content preview from Mastering Blockchain Programming with Solidity
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The safeTransferFrom function
The safeTransferFrom() function is a public function that is used to safely transfer the NFT from the owner's account to the recipient account. Here, safely transfer means that, when a recipient is a contract, you need to ensure that the recipient contract has callbacks registered to let the receiver contract get a notification when ERC721 token transfer is successful.
This function takes the following arguments:
- from: The address of the current owner of the NFT
- to: The address of the recipient who will receive the NFT
- tokenId: tokenId of the NFT that is to be transferred
- _data: The bytes data that is to be forwarded to the ERC721Receiver contract, if the to address (recipient) is a contract
Let's look at the ...