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Erc 1155

Erc 1155 is a Solidity library implementing Ethereum ERC-1155 contracts for tracking and transferring multiple token classes, including fungible, semi-fungible and non-fungible balances. It includes a standard balance implementation and a packed-balance variant.

Explore the practical guide ↓

Independent OpenViST project profile, based on linked sources.

Erc 1155 — OpenViST project profile in Smart Contracts.
OpenViST project illustration. See the linked sources for product details.
Understand the project

Practical overview

When it fits

Use it when developing an Ethereum contract that needs to represent multiple token types and may benefit from transferring related classes together.

Who it is for

  • Solidity developers building Ethereum multi-token contracts
  • Teams managing related asset classes, such as game items, in a single token contract

Documented uses

  • Create a contract that tracks balances for multiple token IDs.
  • Transfer several token classes in a batch.
  • Choose between standard balances and a packed-balance implementation.
Before you choose

Requirements & limits

The repository is public and identifies the package as Apache-2.0 licensed.

  • The packed implementation stores multiple balances in one uint256 using bitwise operations.
  • The README gives example gas comparisons for transfers of 100 token classes; actual costs depend on the contract and transaction.
  • The documented setup uses npm or Yarn and Solidity ^0.8.0.

Check current requirements in the official documentation. Source-based guidance does not mean OpenViST has run or independently tested this project.

Source-based practical guide

Install and inherit the ERC1155 contract

Add the library to a project and start a Solidity contract that inherits from its ERC1155 implementation.

Before you start

  • An npm- or Yarn-managed project
  • A Solidity contract using pragma ^0.8.0

Steps

  1. Install with the command below or yarn add @0xsequence/erc-1155.

    Documented command
    npm install @0xsequence/erc-1155

  2. Import @0xsequence/erc-1155/contracts/tokens/ERC1155/ERC1155.sol in the Solidity source.

  3. Declare a contract that inherits from ERC1155.

Expected outcome

A Solidity contract source set up to inherit the library’s ERC1155 implementation.

Guide limitations

  • The documented example does not cover deployment, token issuance or transaction execution.
Documentation 1 ↗
Evidence and transparency

Sources & review

Official repository ↗
Source record details
Source availability
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Sources checked
16 October 2026
Original website title
0xsequence/erc-1155 · Official homepage title · retained in its source language
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