https://github.com/shanefontaine/4byte

💻 Look up an Ethereum function signature by the 4 bytes of its hash
https://github.com/shanefontaine/4byte

4byte blockchain eth ethereum function-signature hash keccack sha3

Last synced: 10 months ago
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💻 Look up an Ethereum function signature by the 4 bytes of its hash

• Host: GitHub
• URL: https://github.com/shanefontaine/4byte
• Owner: shanefontaine
• License: mit
• Created: 2021-03-27T05:44:28.000Z (about 5 years ago)
• Default Branch: main
• Last Pushed: 2022-03-24T10:47:21.000Z (about 4 years ago)
• Last Synced: 2025-02-28T02:11:05.747Z (over 1 year ago)
• Topics: 4byte, blockchain, eth, ethereum, function-signature, hash, keccack, sha3
• Language: JavaScript
• Homepage:
• Size: 79.1 KB
• Stars: 20
• Watchers: 4
• Forks: 3
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# 4byte

> Look up an Ethereum function signature by the 4 bytes of its hash

[![License](http://img.shields.io/badge/license-MIT-blue.svg)](https://raw.githubusercontent.com/shanefontaine/4byte/master/LICENSE)

[![NPM version](https://badge.fury.io/js/4byte.svg)](http://badge.fury.io/js/4byte)

## Install

```bash

npm install 4byte

```

## Getting started

```javascript

const fourByte = require('4byte')

const signatures = fourByte('0x51c6590a')

console.log(signatures) // ['addLiquidity(uint256)']

```

## CLI

Install:

```bash

npm install -g 4byte

```

Look up a function signature:

```bash

$ 4byte 0xa9059cbb

transfer(bytes4[9],bytes5[6],int48[11])

many_msg_babbage(bytes1)

transfer(address,uint256)

```

```bash

$ 4byte 0xa9059cbb --format=json

[

  "transfer(bytes4[9],bytes5[6],int48[11])",

  "many_msg_babbage(bytes1)",

  "transfer(address,uint256)"

]

```

## Test

```bash

npm test

```

## License

[MIT](LICENSE)