ERC7211155

ERC7211155 is a term used to describe a proposed hybrid standard that aims to combine aspects of ERC-721, the non-fungible token standard, with ERC-1155, the multi-token standard. The goal is to allow a single smart contract to manage both non-fungible tokens and fungible or semi-fungible token types, providing a unified interface for diverse asset types used in games, collectibles, and digital goods.

Design and concepts

A central idea behind ERC7211155 is that token identifiers can represent either unique NFTs or fungible token classes. The standard would define a common set of operations for ownership, approvals, and transfers while supporting batch capabilities. This could include per-token ownership semantics for non-fungible items and balance-based semantics for fungible types, as well as batch transfer and batch balance queries. Metadata would typically be accessible via a URI mechanism, potentially allowing per-id metadata similar to ERC-1155’s URI approach or per-contract metadata like ERC-721. Events would reflect both NFT-like transfers and fungible-style transfers, ensuring compatibility with existing tooling.

Benefits and challenges

If adopted, ERC7211155 could reduce contract count and enable more efficient batch operations, reducing gas when handling collections that mix unique items with fungible assets. It could also simplify tooling and marketplaces that currently support both standards. However, the design is complex, and mixing NFT and fungible semantics within a single contract raises compatibility, security, and migration concerns. Clear specification, robust testing, and careful consideration of existing dapps are essential for any real-world implementation.

Status

As of now, ERC7211155 is not an officially ratified Ethereum standard. Projects and researchers discuss hybrid approaches, but most deployments continue to rely on ERC-721, ERC-1155, or bespoke contracts. See also ERC-721 and ERC-1155 for the respective foundations.

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