A javascript library for getting Solidity method data from a four-byte method signature.
Currently uses the parity on-chain method registry, but eventually I am interested in adding various parallel methods, whatever works and returns a valid response!
With Node.js Installed:
yarn install eth-method-registry -S
const { MethodRegistry } = require('eth-method-registry')
const Eth = require('@metamask/ethjs')
const provider = new Eth.HttpProvider('https://mainnet.infura.io/v3/YOUR-PROJECT-ID')
const registry = new MethodRegistry({ provider })
// Uses promises, pass the 4byte prefix to the lookup method:
registry.lookup('0xa9059cbb')
.then((result) => {
console.log(result) // prints 'transfer(address,uint256)'
})
// Also includes a method for parsing the resulting sig
// into something more useful for rendering:
const sig = 'transferFrom(address,uint256)'
const parsed = registry.parse(sig)
/* Parsed value:
{
name :'Transfer From',
args: [
{ type: 'address' },
{ type: 'uint256' }
]
}
*/The unit tests of this package run against Infura's v3 API.
After cloning this repository, run cp .infurarc.template .infurarc and add your Infura project ID to the file.
yarn test