ERC-1155 Definition

ERC-1155 is an Ethereum token standard that lets one smart contract manage many kinds of tokens at once. A single contract can mint and transfer fungible, non-fungible, and even semi-fungible tokens, which keeps things lean and fast on chain.

Why it was introduced

Older standards like ERC-20 and ERC-721 handle only one token type per contract. Projects that needed both had to deploy and interact with multiple contracts, which added cost and complexity. ERC-1155 solves that by bundling different token types under one roof for simpler operations and fewer transactions.

What a single contract can hold

With ERC-1155, each token type gets its own ID inside the same contract. Those IDs can represent identical items like game currency, unique collectibles like a 1-of-1 artwork, or semi-fungible items that start identical and later become unique. This flexible setup supports many app designs without redeploying new contracts.

Batch operations and gas savings

One standout feature is batch transfers. You can send multiple token IDs and amounts in one transaction instead of many separate ones. That reduces on-chain calls and helps cut gas usage, which is handy for marketplaces and games that move lots of items at once.

Safer transfers and approvals

The standard includes “safe transfer” behaviors that help prevent tokens from getting stuck in contracts that cannot receive them. It also reduces the need for repeated approvals across many single-purpose contracts, which trims transaction count.

Typical uses

Gaming is a natural fit. A studio can manage coins, skins, and one-of-a-kind items in one contract, then move sets of them around in a single call. Digital collectibles platforms also use ERC-1155 to handle editions, series, and unique drops together.

How it compares to other standards

  • ERC-20: fungible only. All units are interchangeable.
  • ERC-721: non-fungible only. Every token is unique.
  • ERC-1155: multi-token. One contract can support fungible, non-fungible, and semi-fungible types, plus batch actions for efficiency.