# chiru-labs/erc721a

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2,547 stars · 826 forks · JavaScript · mit

## Links

- GitHub: https://github.com/chiru-labs/ERC721A
- awesome-repositories: https://awesome-repositories.com/repository/chiru-labs-erc721a.md

## Description

ERC721A is an Ethereum smart contract library and implementation of the ERC721 standard for non-fungible tokens. It provides a technical framework for deploying token collections with a primary focus on reducing gas costs during the minting process.

The implementation distinguishes itself through a gas-optimized approach to batch minting, allowing multiple tokens to be created in a single transaction. It achieves this by minimizing on-chain storage writes and optimizing how ownership data is mapped and stored on the blockchain.

The project covers high-level capabilities for NFT collection deployment and the development of high-efficiency smart contracts. It utilizes specific logic for incremental identifier assignment and storage layouts to lower network fees for both creators and users.

## Tags

### Software Engineering & Architecture

- [Smart Contract Standards](https://awesome-repositories.com/f/software-engineering-architecture/smart-contract-standards.md) — Provides a high-efficiency implementation of the ERC721 standard for non-fungible tokens on Ethereum.
- [Batch Minting Utilities](https://awesome-repositories.com/f/software-engineering-architecture/batch-minting-utilities.md) — Implements optimized functions for creating large quantities of tokens in a single transaction to reduce gas costs.
- [Non-Fungible Token Implementations](https://awesome-repositories.com/f/software-engineering-architecture/non-fungible-token-implementations.md) — Provides a concrete, gas-optimized reference implementation of the ERC721 non-fungible token standard.
- [Sequential Identifier Assignments](https://awesome-repositories.com/f/software-engineering-architecture/sequential-identifier-assignments.md) — Calculates token identifiers based on a global counter to ensure sequential numbering without array iteration.
- [Smart Contract Libraries](https://awesome-repositories.com/f/software-engineering-architecture/smart-contract-libraries.md) — Offers a reusable set of Solidity components designed for inheritance-based composition in high-efficiency contracts.

### Data & Databases

- [Storage Optimization Utilities](https://awesome-repositories.com/f/data-databases/data-storage-optimizers/storage-optimization-utilities.md) — Utilizes advanced storage packing and slot management to minimize expensive SSTORE operations during minting.
- [Storage-Optimized NFT Contracts](https://awesome-repositories.com/f/data-databases/token-supply-models/minting-mechanisms/nft-minting/storage-optimized-nft-contracts.md) — Implements the ERC721 standard with a focus on reducing on-chain storage costs for batch minting operations.
- [Low-Cost Minting Deployments](https://awesome-repositories.com/f/data-databases/data-storage-optimizers/storage-optimization-utilities/gas-optimization-patterns/low-cost-minting-deployments.md) — Enables launching token collections with a focus on lowering minting costs for both creators and users.
- [NFT Minting](https://awesome-repositories.com/f/data-databases/token-supply-models/minting-mechanisms/nft-minting.md) — Facilitates the creation of large sets of digital collectibles on Ethereum while minimizing gas costs.

### Testing & Quality Assurance

- [Gas-Efficient State Mapping](https://awesome-repositories.com/f/testing-quality-assurance/storage-slot-manipulation/gas-efficient-state-mapping.md) — Maps a single storage slot to multiple token IDs to avoid repeated write operations during batch minting.

### Development Tools & Productivity

- [Lazy Initialization](https://awesome-repositories.com/f/development-tools-productivity/lazy-initialization.md) — Defines ownership for ranges of tokens at mint time rather than assigning each individual ID immediately.