Skip to Content
Mastering Blockchain Programming with Solidity
book

Mastering Blockchain Programming with Solidity

by Jitendra Chittoda
August 2019
Intermediate to advanced
486 pages
13h 52m
English
Packt Publishing
Content preview from Mastering Blockchain Programming with Solidity

The ERC721 enumerable

The ERC721Enumerable interface is an optional interface for adding more features to the ERC721 NFT.

The interface defines the following view functions:

  • totalSupply(): The function returns the total number of NFTs issued by the contract that are not burned. Also, each token has a valid owner address that is not address(0).
  • tokenByIndex(): The function returns the tokenId of an NFT that is stored at the provided index.
  • tokenOfOwnerByIndex(): The function returns the tokenId of an NFT that is stored at a particular index of the owner's list of tokens.

Let's look at the ERC721Enumerable interface code:

interface ERC721Enumerable is ERC721 {    function totalSupply() external view returns (uint256);    function tokenByIndex
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

Mastering Ethereum

Mastering Ethereum

Andreas M. Antonopoulos, Gavin Wood
Complete Cryptocurrency and Blockchain Course | Learn Solidity

Complete Cryptocurrency and Blockchain Course | Learn Solidity

Ravinder Deol, Codestars By Rob Percival, Thomas Wiesner

Publisher Resources

ISBN: 9781839218262Supplemental Content