LRC-721 Enumerable Extension

Abstract

LRC-721 Enumerable extension for iterating over all tokens and owner tokens.

Specification

Implements totalSupply(), tokenByIndex(), and tokenOfOwnerByIndex().

Motivation

This standard ensures compatibility with the broader EVM ecosystem while enabling Lux-specific optimizations.

Rationale

Mirrors the corresponding Ethereum standard for maximum compatibility.

Backwards Compatibility

Fully compatible with existing ERC implementations.

Reference Implementation

Repository: https://github.com/luxfi/standard Local Path: /Users/z/work/lux/standard/

Contracts

Contract	Description
lib/openzeppelin-contracts/contracts/token/ERC721/extensions/ERC721Enumerable.sol	OpenZeppelin Enumerable

Interfaces

• lib/openzeppelin-contracts/contracts/token/ERC721/extensions/IERC721Enumerable.sol

Upgradeable Variants

For proxy-based upgradeable contracts:

Contract	Description
ERC721EnumerableUpgradeable.sol	Upgradeable enumerable

Usage: Initialize in initialize() instead of constructor. See OpenZeppelin Upgrades.

Build and Test

cd /Users/z/work/lux/standard

# Build all contracts
forge build

# Run tests
forge test -vvv

# Gas report
forge test --gas-report

Security Considerations

Implementations should follow established security best practices for the corresponding ERC.

Copyright

Copyright and related rights waived via CC0.