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36 lines
1.0 KiB
Markdown
36 lines
1.0 KiB
Markdown
2 years ago
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# Overview
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ERC721A is an improved implementation of the [ERC721](https://eips.ethereum.org/EIPS/eip-721) Non-Fungible Token Standard that supports minting multiple tokens for close to the cost of one.
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## Announcements
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> **📢 Version 4.x introduces several breaking changes.
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> [Please refer to the migration guide for more details.](migration.md)**
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_We highly recommend reading the migration guide_, **especially** _the part on [`supportsInterface`](migration.md?id=supportsinterface) if you are using with OpenZeppelin extensions_ (e.g. ERC2981).
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## Installation
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```
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npm install --save-dev erc721a
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```
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## Usage
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Once installed, you can use the contracts in the library by importing them:
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```solidity
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pragma solidity ^0.8.4;
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import "erc721a/contracts/ERC721A.sol";
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contract Azuki is ERC721A {
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constructor() ERC721A("Azuki", "AZUKI") {}
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function mint(uint256 quantity) external payable {
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// `_mint`'s second argument now takes in a `quantity`, not a `tokenId`.
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_mint(msg.sender, quantity);
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}
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}
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```
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