4byte

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

Install

npm install 4byte

Getting started

const fourByte = require('4byte')

const signatures = fourByte('0x51c6590a')
console.log(signatures) // ['addLiquidity(uint256)']

CLI

Install:

npm install -g 4byte

Look up a function signature:

$ 4byte 0xa9059cbb
transfer(bytes4[9],bytes5[6],int48[11])
many_msg_babbage(bytes1)
transfer(address,uint256)

$ 4byte 0xa9059cbb --format=json
[
  "transfer(bytes4[9],bytes5[6],int48[11])",
  "many_msg_babbage(bytes1)",
  "transfer(address,uint256)"
]

Test

npm test

License

MIT