ERC-5573 multi-asset token contracts

ERC-5573 multi-asset token contracts. In the realm of blockchain and cryptocurrency, token contracts serve as the backbone of decentralized applications (DApps). Token contracts facilitate the creation and management of digital assets. Among the various token standards, ERC-20 has gained significant popularity due to its simplicity and widespread adoption. However, with the evolution of blockchain technology, new standards have emerged to address the limitations of ERC-20. One of which is ERC-5573, known as the Multi-Asset Token Contract. This article aims to provide an in-depth understanding of ERC-5573 and the process of creating a sample contract.

What is an ERC-5573 Multi-Asset Token Contract?

The ERC-5573 Multi-Asset Token Contract is an Ethereum-based smart contract standard that allows the creation and management of tokens representing multiple assets within a single contract. In simpler terms, it enables users to tokenize a variety of assets, such as real estate, commodities, or even other cryptocurrencies, all within one contract.

Why would someone create an ERC-5573 Multi-Asset Token Contract?

There are several compelling reasons why individuals or organizations might opt to create an ERC-5573 Multi-Asset Token Contract:

  • Diversification: By combining multiple assets into a single token contract, investors can easily diversify their portfolios and gain exposure to various asset classes within the blockchain ecosystem.
  • Simplified Management: Managing a diverse range of assets can be complex and time-consuming. The ERC-5573 standard streamlines this process by allowing the administration of different assets through a unified contract, reducing operational overhead.
  • Enhanced Liquidity: Traditional assets like real estate or art can be illiquid, hindering their transferability. With ERC-5573, these assets can be tokenized, enabling fractional ownership and facilitating liquidity through decentralized exchanges.
  • Interoperability: ERC-5573 tokens are fully compatible with other Ethereum-based standards, enabling seamless integration with existing DApps and supporting interactions with other contracts or platforms within the Ethereum ecosystem.
  • Cost Efficiency: Creating and maintaining multiple contracts for various assets can be costly. With ERC-5773, organizations and individuals can reduce deployment and maintenance expenses by consolidating their assets into a single contract.

Examples of an ERC-5573 multi asset token contract

Here are some example use cases that could benefit from the utilization of an ERC-5773 multi-asset token contract:

Investment Portfolio

An investment firm could create a multi-asset token that represents a diversified portfolio of various assets, such as cryptocurrencies, stocks, and commodities. Investors can then hold and trade this token, gaining exposure to multiple assets within a single contract.

Real Estate Fractional Ownership

With an ERC-5773 contract, real estate properties can be tokenized, allowing investors to own fractional shares of the property. The multi-asset token could represent a combination of different properties, enabling easier buying, selling, and management of real estate investments.

Commodities Tracking

A multi-asset token contract could be used to represent a basket of commodities, such as gold, silver, and oil. This allows investors to gain exposure to a diversified commodities portfolio without the need to manage individual contracts for each asset.

Digital Collectibles Funds

ERC-5773 tokens can be employed to create funds that hold a collection of digital collectibles, such as non-fungible tokens (NFTs). This simplifies the process of managing and trading digital collectibles as a group, providing liquidity and diversification to collectors.

Gaming Assets

In the gaming industry, this contract could be utilized to create multi-asset tokens representing various in-game assets, such as weapons, characters, or virtual properties. This facilitates seamless trading and ownership of game assets, enhancing the gaming experience for players.

Tokenized Indices

An ERC-5773 contract can be employed to create tokens that represent a specific market index. These tokens can include a diversified portfolio of assets, enabling investors to gain exposure to an entire market or sector without the need to hold individual assets.

Supply Chain Management

Multi-asset tokens can be used to represent ownership of physical assets within a supply chain. For instance, a company could tokenize goods at different stages of production and track their movement, ownership, and value throughout the supply chain process.

Intellectual Property Licensing

By utilizing an ERC-5773 contract, creators and artists can tokenize their intellectual property rights, such as music, art, or patents. This allows for easier licensing, royalty distribution, and trading of these rights within a transparent and decentralized ecosystem.

These examples highlight the versatility of ERC-5773 multi-asset token contracts, demonstrating how they can be utilized across various industries to streamline asset management, enhance liquidity, and provide innovative solutions for tokenization needs.

How is ERC-5573 different from ERC-20?

While ERC-5573 shares some similarities with ERC-20, there are key differences that set it apart:

  • Asset Flexibility: ERC-20 contracts are primarily designed for fungible tokens, meaning each token is interchangeable with another. In contrast, ERC-5573 provides the flexibility to tokenize non-fungible assets, enabling the representation of unique assets or fractional ownership of divisible assets.
  • Multiple Asset Support: ERC-5573 allows the inclusion of various asset types within a single contract, while ERC-20 is limited to one type of token per contract.
  • Asset-Specific Functions: ERC-5573 tokens can have asset-specific functions embedded within the contract, enabling customized behavior based on the specific asset type. This feature is not available in ERC-20.
  • Enhanced Metadata: ERC-5573 supports extended metadata, allowing for richer descriptions of assets, including details like title, description, image, or external references. ERC-20 has more limited metadata capabilities.

Sample ERC-5773 Contract

Below is an example of an ERC-5773 multi-asset token contract with code comments to guide new users through the process of creating a contract:

pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC5773/ERC5773.sol";

contract MultiAssetToken is ERC5773 {
    // Constructor function to initialize the contract
        string memory _name,
        string memory _symbol,
        uint256[] memory _assetIds,
        address[] memory _assetHolders
    ) ERC5773(_name, _symbol) {
        // Check if the length of assetIds and assetHolders arrays are equal
        require(_assetIds.length == _assetHolders.length, "Invalid input");

        // Loop through the assetIds and assetHolders arrays to assign ownership of assets
        for (uint256 i = 0; i < _assetIds.length; i++) {
            // Assign the asset holder (_assetHolders[i]) as the owner of the asset with the corresponding ID (_assetIds[i])
            _addHolder(_assetIds[i], _assetHolders[i]);

    // Internal function to add a new asset holder
    function _addHolder(uint256 _assetId, address _holder) internal {
        // Check if the asset ID is valid (greater than 0)
        require(_assetId > 0, "Invalid asset ID");

        // Check if the asset holder address is valid (not the zero address)
        require(_holder != address(0), "Invalid asset holder address");

        // Set the asset holder (_holder) as the owner of the asset with the specified ID (_assetId)
        _setHolder(_assetId, _holder);

This sample contract demonstrates the basic structure of an ERC-5773 multi-asset token contract. It includes a constructor function that initializes the contract with a name, symbol, and arrays of asset IDs and asset holders. The contract verifies the validity of input parameters and assigns ownership of assets to their respective holders.

To create a contract, you can follow these steps:

  1. Define the contract by providing a name, symbol, and arrays of asset IDs and asset holders.
  2. Ensure that the length of the assetIds and assetHolders arrays is the same.
  3. Use a loop to iterate through the arrays and assign ownership of assets to their respective holders using the _addHolder function.
  4. Inside the _addHolder function, validate the asset ID and asset holder address before setting the holder as the owner of the asset using the _setHolder function.

By following these steps, you can create a custom ERC-5773 multi-asset token contract tailored to your specific requirements.


Blockchain Networks

Below is a list of EVM compatible Mainnet and Testnet blockchain networks. Each link contains network configuration, links to multiple faucets for test ETH and tokens, bridge details, and technical resources for each blockchain. Basically everything you need to test and deploy smart contracts or decentralized applications on each chain. For a list of popular Ethereum forums and chat applications click here.

Ethereum test network configuration and test ETH faucet information
Optimistic Ethereum Mainnet and Testnet configuration, bridge details, etc.
Polygon network Mainnet and Testnet configuration, faucets for test MATIC tokens, bridge details, etc.
Binance Smart Chain Mainnet and Testnet configuration, faucets for test BNB tokens, bridge details, etc.
Fanton networt Mainnet and Testnet configuration, faucets for test FTM tokens, bridge details, etc.
Kucoin Chain Mainnet and Testnet configuration, faucets for test KCS tokens, bridge details, etc.

Web3 Software Libraries

You can use the following libraries to interact with an EVM compatible blockchain.