Comprehensive Guide to ERC-721 and ERC-1155: Explore the distinctions between these NFT standards, their core features, advantages, and real-world use cases on the Ethereum blockchain. Perfect for developers and crypto investors.
Introduction to Non-Fungible Token Standards
In blockchain ecosystems, exchange value is represented through the tokenization of assets. These assets can be either fungible or non-fungible. Fungible assets can be split and traded for identical units, while non-fungible tokens (NFTs) are indivisible and have no duplicates. On Ethereum, two widely adopted standards enable NFT creation: ERC-721 and ERC-1155.
The ERC-721 standard, written in Solidity on Ethereum, lets developers tokenize ownership of arbitrary data. ERC-1155 improves on ERC-721 by supporting both fungible and non-fungible tokens. Its main goal is to provide a smart contract interface that can represent both categories within a single protocol.
What Is ERC-721?
ERC-721 is a non-fungible token standard implemented in Solidity for Ethereum. It enables developers to tokenize ownership of any arbitrary data. Specifically, ERC-721 is designed to create unique, indivisible NFTs. The standard was introduced in 2018 by William Entriken, Dieter Shirley, Jacob Evans, and Nastassia Sachs.
Each ERC-721 token is unique and represents a distinct asset. This key feature allows developers to build an entirely new ecosystem of tokens on Ethereum. Unlike fungible tokens such as ERC-20, where every unit is interchangeable, ERC-721 tokens have unique identifiers that set them apart. This uniqueness makes ERC-721 ideal for representing digital art, collectibles, virtual real estate, or any asset that requires individual identification.
Key Characteristics of ERC-721 Tokens
ERC-721's structure is similar to the well-known ERC-20 standard. Although their smart contracts share some functions, ERC-721 introduces important distinctions.
Notable ERC-721 features include:
Token Name: Every ERC-721 token has a name field that identifies it for external applications or contracts. This helps streamline the identification and management of NFT collections.
Ownership: ERC-721 defines ownership through a dedicated function and provides instructions for transferring ownership. This ensures traceability and security for token transfers.
Token Tracking: The "tokenOfOwnerByIndex" field in ERC-721 allows developers to track tokens using unique identifiers. This is critical for managing large collections and lets owners view all their digital assets.
These features make ERC-721 a solid and reliable standard for creating NFTs, even though it has some limitations related to efficiency and transaction costs.
What Is ERC-1155?
ERC-1155 is a major improvement over ERC-721. It’s a token standard on Ethereum that supports both fungible and non-fungible tokens. Its primary purpose is to offer a smart contract interface that manages both types within one protocol.
ERC-1155 incorporates the features of both ERC-721 and ERC-20, while delivering greater efficiency. With ERC-1155, transactions can be bundled together, significantly lowering token trading costs—an important benefit given the high gas fees on Ethereum.
This standard was designed for blockchain game and decentralized app developers who need to manage multiple asset types at once. For example, a game might need to handle both unique items (like legendary weapons) and fungible resources (such as gold or experience points).
Advantages of ERC-1155 Tokens
ERC-1155 stands out with these key features:
Efficient Transfer: ERC-1155 allows users to transfer large quantities of tokens in a single smart contract operation. For example, developers can transfer multiple fungible or non-fungible tokens at once, reducing transaction costs and minimizing network impact—especially valuable for platforms with high trading volumes.
Multiple Tokens within One Contract: ERC-1155 supports both fungible and non-fungible tokens within a single contract. This flexibility streamlines decentralized app architecture and lowers development complexity.
Secure Token Transfers: ERC-1155 includes a function to validate transactions. If a transaction fails, the token is automatically returned to the sender. This safeguard protects users from accidental losses due to errors such as mistyped addresses or incorrect information.
These advantages make ERC-1155 a top choice for developers seeking efficiency and reduced operational costs in blockchain applications.
ERC-721 vs. ERC-1155: Main Differences
Smart Contract
ERC-721 creates only NFTs and requires developers to deploy a separate smart contract for every new token, which quickly gets expensive and complicated for large collections. ERC-1155, in contrast, enables developers to use a single smart contract to create both fungible tokens and NFTs, greatly simplifying development and deployment.
Efficiency
ERC-721 only allows one operation per transaction, making it costly and slow, and it introduces redundant code that reduces blockchain network efficiency. Each transaction needs its own confirmation, increasing gas fees and processing time.
ERC-1155, on the other hand, enables multiple operations in a single transaction—making transactions cheaper and more efficient. It also uses less blockchain storage compared to ERC-721, resulting in major cost savings for large projects managing thousands or millions of tokens.
Which Standard to Choose: ERC-721 or ERC-1155?
Both standards can be used to create NFTs. So which one is best for you? The answer depends on your specific needs and preferences.
Some art collectors buy only ERC-721 NFTs, viewing them as the industry benchmark. ERC-721’s reputation is largely due to its status as the first widely adopted NFT standard and its use by top-tier platforms—making it synonymous with authenticity and legitimacy.
Other collectors are less concerned with the technical standard and focus on the artwork’s quality and intrinsic value. These users appreciate the practical and economic benefits of each standard.
ERC-1155 offers lower costs and greater efficiency thanks to reduced gas fees, making it an accessible option for creating NFTs. This is especially valuable for creators launching large collections or platforms handling high transaction volumes. ERC-1155 also delivers greater flexibility for projects that require simultaneous management of both fungible and non-fungible tokens.
Ultimately, your choice between ERC-721 and ERC-1155 should be driven by your goals, budget, and project type. For traditional digital art collections where every item is unique, ERC-721 is often the optimal choice. For gaming or projects needing flexible management of multiple asset types, ERC-1155 delivers significant advantages in cost and efficiency.
FAQ
What are the main differences between ERC-721 and ERC-1155?
ERC-721 is for unique NFTs. ERC-1155 supports multiple token types (NFTs and fungible tokens) and can cut transaction costs by up to 90%. ERC-1155 also enables batch transfers in a single contract.
ERC-721 is an Ethereum standard that sets the rules for creating unique, non-fungible NFTs. Each token has a distinct ID and represents a verified digital asset. Developers can easily build NFTs with ownership and transfer features using ERC-721.
What is the ERC-1155 standard, and why is it called the multi-token standard?
ERC-1155 is a smart contract standard that enables simultaneous representation and management of fungible and non-fungible tokens. It combines the strengths of ERC-20 and ERC-721, earning its name as the multi-token standard.
Upload your artwork to IPFS, create a JSON metadata file, deploy a smart contract via Remix IDE with the 0xcert/ethereum-erc721 library, and then use the mint function with the recipient's address and the JSON URI.
What are the pros and cons of ERC-1155 compared to ERC-721?
ERC-1155 offers better efficiency with batch operations and semi-fungible asset management, while ERC-721 is limited to unique NFTs. However, ERC-1155 doesn't provide the same level of specificity or recognition as ERC-721 for high-end collections.
Should you use ERC-721 or ERC-1155 when creating NFTs?
Choose ERC-721 for unique, single NFTs. Select ERC-1155 for bulk transfers and mixed assets—it reduces gas fees and supports multiple token types.
How do ERC-721 and ERC-1155 differ in terms of gas fees and transaction efficiency?
ERC-721 results in higher gas fees, as each NFT requires its own transaction. ERC-1155 supports batch transfers, lowering gas costs and improving transaction efficiency.
* The information is not intended to be and does not constitute financial advice or any other recommendation of any sort offered or endorsed by Gate.
