ERC-1155

ERC-1155 is an Ethereum token standard proposed by Enjin in 2018 that introduces an architecture Multitoken, able to manage fungible, non-fungible and semifungible tokens within a single smart contract. Unlike ERC-20 (for fungible tokens) or ERC-721 (for non-fungible tokens), ERC-1155 allows multiple types of assets to be represented under a single contract, reducing gas consumption and improving transaction efficiency. Its optimized structure is ideal for projects that require multiple instances of similar or different tokens, such as video games, marketplaces, digital art, or mixed collections.

Each token is identified by a ID unique, and its behavior (fungible or not) is defined by the logic of the contract. For example, a game can issue 1,000 units of token ID 1 (a fungible currency) and just 1 unit of token ID 2 (a legendary NFT sword), all from the same contract. In addition, ERC-1155 allows batch transfers (BatchTransfer) and efficient approval management (SetApprovalForAll), which dramatically reduces costs when operating multiple assets at the same time. This standard is also compatible with dynamic metadata interfaces, making it ideal for evolutionary NFTs, objects with levels, modifiable attributes, or integrations with external systems.

In short, ERC-1155 combines the flexibility of ERC-721 and ERC-20 in a more powerful, economical and scalable solution, and has established itself as the preferred standard in Web3 games, hybrid collections and platforms that need to handle large volumes of digital assets with efficiency and security.