https://github.com/pascaldekloe/enft

Efficient Token Contracts ⛽️
https://github.com/pascaldekloe/enft

eip712 nft solidity

Last synced: about 1 month ago
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Efficient Token Contracts ⛽️

• Host: GitHub
• URL: https://github.com/pascaldekloe/enft
• Owner: pascaldekloe
• Created: 2022-03-21T14:23:32.000Z (almost 3 years ago)
• Default Branch: master
• Last Pushed: 2023-06-15T10:56:24.000Z (over 1 year ago)
• Last Synced: 2024-10-20T09:15:02.446Z (2 months ago)
• Topics: eip712, nft, solidity
• Language: Solidity
• Homepage:
• Size: 1.17 MB
• Stars: 0
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# ENFT

The `contracts` directory provides interfaces and implementations of EIP token

standards. All payable methods are writen for minimal gas consumption.

Automated tests execute standalone with `npx hardhat test`. Hardhat itself can

be obtained with `npm install --save-dev hardhat`.

This is free and unencumbered software released into the

[public domain](https://creativecommons.org/publicdomain/zero/1.0).

[![Build Status](https://github.com/pascaldekloe/enft/actions/workflows/test.yml/badge.svg)](https://github.com/pascaldekloe/enft/actions/workflows/test.yml)

## Efficiency

A `FixedNFTSet` deployement costs 837 k gas.

Token transfers come in 3 variations.

1. A plain `transferFrom` as the onwer of a token costs 49 k gas.

2. An `approve` costs 48 k gas, with another 48 k gas on `tranferFrom`.

3. A `setApprovalForAll` costs 46 k gas, with another 49 k gas on `tranferFrom`.

## Use

The `NFTBuyout` contract is ready on the following chains. Please share when you

deploy on a chain not listed here.

* [Mainnet](https://etherscan.io/address/0xb816782c5bff5dec497d316b070b229c7cd63e83#code)

* [Sepolia](https://sepolia.etherscan.io/address/0x1b9dfecb419029a54b594327ea23d1a0ea0eafff#code)

Custom tokens can simply inherit the `FixedNFTSet` contract.

It is recommended to import contracts with a versioned path only.

```solidity

// SPDX-License-Identifier: CC0-1.0

pragma solidity >=0.8.13;

import "https://github.com/pascaldekloe/enft/blob/v1.2.0/contracts/FixedNFTSet.sol";

// NFT example with 12 tokens.

contract MyDozen is FixedNFTSet {

// Constructor assigns all 12 tokens to the receiver address.

constructor(address receiver) FixedNFTSet(12, receiver) {

	// initial Transfer emission is optional

	for (uint token = 0; token < 12; token++) {

		emit Transfer(address(0), receiver, token);

	}

}

}

```

For a full NFT example with metadata and more, see

[CollectiblesSale on mainnet](https://etherscan.io/address/0x1d9bd2379123cfdd19210aafc670b067a3fff04f#code#L410).

In a Node.js environment you can use the contracts in a project with

`npm install https://github.com/pascaldekloe/enft.git`, and then import with

`import "enft/contracts/ERC721.sol";` instead of the HTTP URL.

## Standard Compliance

*  “Token Standard” EIP-20

*  “Non-Fungible Token Standard” EIP-721